Patent US2888129A successfully refreshed from Google Patents.
Patent US6650095B2 successfully refreshed from Google Patents.
US6650095B2
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Low power, dual output AC/DC and DC/DC converter
Assignee: STMicroelectronics SRL
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Filing: 2002-03-01
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Granted: 2003-11-18
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Expires: 2022-03-01
Abstract
Abstract The converter uses the energy stored in the output filter of a step-down (or buck) converter and in the inductor of a step up/down (or buck-boost) converter to supply a second output of opposite sign. In particular, the converter has a first input receiving an input voltage; a first output supplying a first output voltage of a first sign; a second output supplying a second output voltage of opposite sign; a controlled switch connected between the first input and a first intermediate node; an inductor connected between the first intermediate node and the first output; a diode connected between the first intermediate node and a second intermediate node; and a dual voltage generating circuit connected between the second intermediate node and the second output.
Inventors
- 👤 Natale Aiello
- 👤 Francesco Giovanni Gennaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:50
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M1/00; H02M1/0083; H02M1/009
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
218 words
An AC/DC and DC/DC converter, comprising: a first input to receive an input voltage; a first output to supply a first output voltage, of a first sign; a second output to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input and a first intermediate node; a first component, connected between said first intermediate node and said first output; a second component, connected between said first intermediate node and a reference potential line, one of said first and second components comprising an inductive element and another of said first and second components comprising a unidirectional current conducting element that is open in a conduction phase of said controlled switch and closed in a recirculation phase; and a dual voltage generating circuit, coupled to said inductive element and connected to said second output of said converter, wherein said dual voltage generating circuit comprises a recirculation energy acquisition element, connected to said inductive element in said recirculation phase, and an energy accumulation and filtering element, connected between said recirculation energy acquisition element and said second output of said converter, wherein the dual voltage generating circuit can use at least part of an energy stored by the inductive element to generate the second output voltage during the recirculation phase.
Claim 2
Dependent Claim
218 words
An AC/DC and DC/DC converter, comprising: a first input to receive an input voltage; a first output to supply a first output voltage, of a first sign; a second output to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input and a first intermediate node; a first component, connected between said first intermediate node and said first output; a second component, connected between said first intermediate node and a reference potential line, one of said first and second components comprising an inductive element and another of said first and second components comprising a unidirectional current conducting element that is open in a conduction phase of said controlled switch and closed in a recirculation phase; and a dual voltage generating circuit, coupled to said inductive element and connected to said second output of said converter, wherein said dual voltage generating circuit comprises a recirculation energy acquisition element, connected to said inductive element in said recirculation phase, and an energy accumulation and filtering element, connected between said recirculation energy acquisition element and said second output of said converter, wherein the dual voltage generating circuit can use at least part of an energy stored by the inductive element to generate the second output voltage during the recirculation phase.
Claim 3
Dependent Claim
68 words
The converter according to claim 1 wherein said dual voltage generating circuit is connected between said second component and said reference potential line, and forms, with said second component, a second intermediate node; said recirculation energy acquisition element being connected between said second intermediate node and said reference potential line; and said energy accumulation and filtering element being connected between said reference potential line and said second output.
Claim 4
Dependent Claim
17 words
The converter according to claim 2 wherein said recirculation energy acquisition element comprises a first voltage generator.
Claim 5
Dependent Claim
17 words
The converter according to claim 3 wherein said recirculation energy acquisition element comprises a first Zener diode.
Claim 6
Dependent Claim
17 words
The converter according to claim 4 wherein said energy accumulation and filtering element comprises a capacitive element.
Claim 7
Dependent Claim
17 words
The converter according to claim 5 , further comprising a regulation circuit connected to said second output.
Claim 8
Dependent Claim
34 words
The converter according to claim 6 wherein said regulation circuit comprises: a modulated load connected between said first output and said reference potential line and having a modulation input connected to said second output.
Claim 9
Dependent Claim
25 words
The converter according to claim 7 wherein said modulation input of said modulated load is connected to said second output via a second voltage generator.
Claim 10
Dependent Claim
78 words
The converter according to claim 8 wherein said modulated load comprises: a first transistor element connected between said first output and said reference potential line and having a control input; a second transistor element connected between said control input of said first transistor element and said reference potential line and having a control terminal; and said second voltage generator comprises a second Zener diode connected between said control input of said second transistor element and said second output.
Claim 11
Dependent Claim
62 words
The converter according to claim 5 wherein said first component is an inductor and said second component is a diode having a cathode connected to said first intermediate node, and an anode connected to said second intermediate node, and wherein said first Zener diode having an anode connected to said second intermediate node and a cathode connected to said reference potential line.
Claim 12
Dependent Claim
65 words
The converter according to claim 9 wherein said first component is an inductor and said second component is a diode having a cathode connected to said first intermediate node, and an anode connected to said second intermediate node, and wherein said second Zener diode having a cathode connected to said control input of said second transistor element, and an anode connected to said second output.
Claim 13
Dependent Claim
61 words
The converter according to claim 5 wherein said first component is a diode having a cathode connected to said first intermediate node and an anode connected to said first output, and said second component is an inductor, and wherein said first Zener diode having a cathode connected to said second intermediate node, and an anode connected to said reference potential line.
Claim 14
Dependent Claim
64 words
The converter according to claim 9 wherein said first component is a diode having a cathode connected to said first intermediate node and an anode connected to said first output, and said second component is an inductor, and wherein said second Zener diode having an anode connected to said control input of said second transistor element and a cathode connected to said second output.
Claim 15
Dependent Claim
166 words
An AC/DC and DC/DC converters comprising: a first input terminal to receive an input voltage; a first output terminal to supply a first output voltage, of a first sign; a second output terminal to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input terminal and a first intermediate node; a first component, connected between said first intermediate node and said first output terminal; and a second component, connected between said first intermediate node and a second intermediate node, wherein one of said first and second components comprises an inductive element and another of said first and second components comprises a unidirectional current conducting element, thereby forming a dual voltage generating circuit connected between said second intermediate node and said second output terminal, wherein the dual voltage generating circuit is coupled to use at least part of an energy supplied by the inductive element to generate the second output voltage during a recirculation phase.
Claim 16
Dependent Claim
166 words
An AC/DC and DC/DC converters comprising: a first input terminal to receive an input voltage; a first output terminal to supply a first output voltage, of a first sign; a second output terminal to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input terminal and a first intermediate node; a first component, connected between said first intermediate node and said first output terminal; and a second component, connected between said first intermediate node and a second intermediate node, wherein one of said first and second components comprises an inductive element and another of said first and second components comprises a unidirectional current conducting element, thereby forming a dual voltage generating circuit connected between said second intermediate node and said second output terminal, wherein the dual voltage generating circuit is coupled to use at least part of an energy supplied by the inductive element to generate the second output voltage during a recirculation phase.
Claim 17
Independent Claim
122 words
A method for AC/DC and DC/DC conversion, comprising the steps of: supplying an input voltage to an output filter comprising an inductive component in a first operating step; filtering said input voltage to generate a first output voltage, of a first sign; interrupting said step of supplying an input voltage; causing a recirculation current to flow through said inductive element in a second operating step, said recirculation current being associated to a recirculation energy; acquiring, in said second operating step, at least part of said recirculation energy; and accumulating said part of the recirculation energy in a storage element to generate a second output voltage, of a second sign opposite to said first sign, directly from said part of the recirculation energy.
Claim 18
Independent Claim
122 words
A method for AC/DC and DC/DC conversion, comprising the steps of: supplying an input voltage to an output filter comprising an inductive component in a first operating step; filtering said input voltage to generate a first output voltage, of a first sign; interrupting said step of supplying an input voltage; causing a recirculation current to flow through said inductive element in a second operating step, said recirculation current being associated to a recirculation energy; acquiring, in said second operating step, at least part of said recirculation energy; and accumulating said part of the recirculation energy in a storage element to generate a second output voltage, of a second sign opposite to said first sign, directly from said part of the recirculation energy.
Claim 19
Dependent Claim
252 words
A converter, comprising: a switch having a control terminal, input terminal coupled to an input node of the converter, and an output terminal; a first device having a first terminal coupled to the output terminal of the switch, and a second terminal coupled to a first output node of the converter; a second device having a first terminal coupled to the first terminal of the first device, and a second terminal coupled to a second output node of the converter; an energy recovery device having a first terminal coupled to the second terminal of the second device and to the second output node of the converter, and a second terminal coupled to a reference line; a first charge storage device having a first terminal coupled to the second terminal of the first device, and a second terminal coupled to the reference line; a second charge storage device having a first terminal coupled to the second output node of the converter, and a second terminal coupled to the reference line; and a variable load control circuit having a first terminal coupled to the first output node of the converter, a second terminal coupled to the second output node of the converter, and a third terminal coupled to the reference line wherein the energy recovery device is coupled to use at least part of an inductor energy provided from either one of the first or second devices to generate an output voltage at the second output node of the converter during a recirculation phase.
Claim 20
Dependent Claim
252 words
A converter, comprising: a switch having a control terminal, input terminal coupled to an input node of the converter, and an output terminal; a first device having a first terminal coupled to the output terminal of the switch, and a second terminal coupled to a first output node of the converter; a second device having a first terminal coupled to the first terminal of the first device, and a second terminal coupled to a second output node of the converter; an energy recovery device having a first terminal coupled to the second terminal of the second device and to the second output node of the converter, and a second terminal coupled to a reference line; a first charge storage device having a first terminal coupled to the second terminal of the first device, and a second terminal coupled to the reference line; a second charge storage device having a first terminal coupled to the second output node of the converter, and a second terminal coupled to the reference line; and a variable load control circuit having a first terminal coupled to the first output node of the converter, a second terminal coupled to the second output node of the converter, and a third terminal coupled to the reference line wherein the energy recovery device is coupled to use at least part of an inductor energy provided from either one of the first or second devices to generate an output voltage at the second output node of the converter during a recirculation phase.
Claim 21
Dependent Claim
20 words
The converter according to claim 16 wherein the first device comprises an inductor, and the second device comprises a diode.
Claim 22
Dependent Claim
20 words
The converter according to claim 16 wherein the first device comprises a diode, and the second device comprises an inductor.
Claim 23
Dependent Claim
15 words
The converter according to claim 16 wherein the energy recovery device comprises a Zener diode.
Claim 24
Dependent Claim
151 words
The converter according to claim 16 wherein the variable load control circuit comprises: a first transistor having control, first and second terminals wherein the first terminal is coupled to the first output node of the converter, and the second terminal is coupled to the reference line; a second transistor having control, first and second terminals wherein the first terminal is coupled to the reference line, and the second terminal is coupled to the control terminal of the first transistor; a resistor having a first and second terminals wherein the first terminal is coupled to the first output node of the converter, and the second terminal is coupled to the control terminal of the first transistor; and a diode having first and second terminals wherein the first terminal is coupled to the control terminal of the second transistor, and the second terminal is coupled to the second output node of the converter.
Claim 25
Dependent Claim
188 words
The converter according to claim 16 wherein the variable load control circuit comprises: a first transistor having control, first and second terminals wherein the first terminal is coupled to the first output node of the converter, and the second terminal is coupled to the reference line; a second transistor having control, first and second terminals wherein the first terminal is coupled to the reference line, and the second terminal is coupled to the control terminal of the first transistor; a first resistor having a first and second terminals wherein the first terminal is coupled to the first output node of the converter, and the second terminal is coupled to the control terminal of the first transistor; a second resistor having first and second terminals wherein the first terminal is coupled to the first output node of the converter, and the second terminal is coupled to the control terminal of the second transistor; and a diode having first and second terminals wherein the first terminal is coupled to the first output node of the converter, and the second terminal is coupled to the second output node of the converter.
Claim 26
Independent Claim
299 words
An apparatus, comprising: a first input terminal to receive an input voltage; a first output terminal to supply a first output voltage, of a first sign; a second output terminal to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input terminal and a first intermediate node; a first component, connected between said first intermediate node and said first output terminal; a second component, connected between said first intermediate node and a reference potential line, one of said first and second components comprising an inductive element and another of said first and second components comprising a unidirectional current conduction element that is open in a conduction phase of said controlled switch and closed in a recirculation phase; and a dual voltage generator circuit, coupled to said inductive element and connected to said second output terminal, wherein said dual voltage generator circuit comprises a voltage generator having a Zener diode, connected to said inductive element in said recirculation phase, and a capacitive element, connected between said Zener diode and said second output terminal, wherein said dual voltage generator circuit is connected between said second component and said reference potential line, and forms, with said second component, a second intermediate node, wherein said Zener diode being connected between said second intermediate node and said reference potential line, and said capacitive element being connected between said reference potential line and said second output terminal, and wherein said first component comprises an inductor and said second component comprises a diode having a cathode connected to said first intermediate node, and an anode connected to said second intermediate node, and wherein said Zener diode has an anode connected to said second intermediate node and a cathode connected to said reference potential line.
Claim 27
Independent Claim
299 words
An apparatus, comprising: a first input terminal to receive an input voltage; a first output terminal to supply a first output voltage, of a first sign; a second output terminal to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input terminal and a first intermediate node; a first component, connected between said first intermediate node and said first output terminal; a second component, connected between said first intermediate node and a reference potential line, one of said first and second components comprising an inductive element and another of said first and second components comprising a unidirectional current conduction element that is open in a conduction phase of said controlled switch and closed in a recirculation phase; and a dual voltage generator circuit, coupled to said inductive element and connected to said second output terminal, wherein said dual voltage generator circuit comprises a voltage generator having a Zener diode, connected to said inductive element in said recirculation phase, and a capacitive element, connected between said Zener diode and said second output terminal, wherein said dual voltage generator circuit is connected between said second component and said reference potential line, and forms, with said second component, a second intermediate node, wherein said Zener diode being connected between said second intermediate node and said reference potential line, and said capacitive element being connected between said reference potential line and said second output terminal, and wherein said first component comprises an inductor and said second component comprises a diode having a cathode connected to said first intermediate node, and an anode connected to said second intermediate node, and wherein said Zener diode has an anode connected to said second intermediate node and a cathode connected to said reference potential line.
Claim 28
Dependent Claim
17 words
The apparatus of claim 22 , further comprising a regulation circuit coupled to the second output terminal.
Claim 29
Dependent Claim
35 words
The apparatus of claim 23 wherein the regulation circuit comprises a modulated load coupled between the first output terminal and the reference potential line, and having a modulation input coupled to the second output terminal.
Claim 30
Independent Claim
298 words
An apparatus, comprising: a first input terminal to receive an input voltage; a first output terminal to supply a first output voltage, of a first sign; a second output terminal to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input terminal and a first intermediate node; a first component, connected between said first intermediate node and said first output terminal; a second component, connected between said first intermediate node and a reference potential line, one of said first and second components comprising an inductive element and another of said first and second components comprising a unidirectional current conduction element that is open in a conduction phase of said controlled switch and closed in a recirculation phase; and a dual voltage generator circuit, coupled to said inductive element and connected to said second output terminal, wherein said dual voltage generator circuit comprises a voltage generator having a Zener diode, connected to said inductive element in said recirculation phase, and a capacitive element, connected between said Zener diode and said second output terminal, wherein said dual voltage generator circuit is connected between said second component and said reference potential line, and forms, with said second component, a second intermediate node, wherein said Zener diode being connected between said second intermediate node and said reference potential line, and said capacitive element being connected between said reference potential line and said second output terminal, and wherein said first component comprises a diode having a cathode connected to said first intermediate node and an anode connected to said first output, and said second component comprises an inductor, and wherein said Zener diode has a cathode connected to said second intermediate node, and an anode connected to said reference potential line.
Claim 31
Independent Claim
298 words
An apparatus, comprising: a first input terminal to receive an input voltage; a first output terminal to supply a first output voltage, of a first sign; a second output terminal to supply a second output voltage, of a second sign opposite to said first sign; a controlled switch, connected between said first input terminal and a first intermediate node; a first component, connected between said first intermediate node and said first output terminal; a second component, connected between said first intermediate node and a reference potential line, one of said first and second components comprising an inductive element and another of said first and second components comprising a unidirectional current conduction element that is open in a conduction phase of said controlled switch and closed in a recirculation phase; and a dual voltage generator circuit, coupled to said inductive element and connected to said second output terminal, wherein said dual voltage generator circuit comprises a voltage generator having a Zener diode, connected to said inductive element in said recirculation phase, and a capacitive element, connected between said Zener diode and said second output terminal, wherein said dual voltage generator circuit is connected between said second component and said reference potential line, and forms, with said second component, a second intermediate node, wherein said Zener diode being connected between said second intermediate node and said reference potential line, and said capacitive element being connected between said reference potential line and said second output terminal, and wherein said first component comprises a diode having a cathode connected to said first intermediate node and an anode connected to said first output, and said second component comprises an inductor, and wherein said Zener diode has a cathode connected to said second intermediate node, and an anode connected to said reference potential line.
Claim 32
Dependent Claim
23 words
The apparatus of claim 25 , further comprising a regulation circuit having a modulated load and being coupled to the second output terminal.
Claim 33
Dependent Claim
80 words
The apparatus of claim 26 wherein the regulation circuit comprises: a first transistor element coupled between said first output terminal and said reference potential line and having a control input terminal; a second transistor element connected between said control input terminal of said first transistor element and said reference potential line and having a control terminal; and another voltage generator having another Zener diode connected between said control input terminal of said second transistor element and said second output terminal.
Claim 34
Independent Claim
325 words
An apparatus, comprising: a switch having a control terminal, an input terminal coupled to an input node, and an output terminal; a first device having a first terminal coupled to the output terminal of the switch, and a second terminal coupled to a first output node; a second device having a first terminal coupled to the first terminal of the first device, and a second terminal coupled to a second output node; an energy recovery device having a first terminal coupled to the second terminal of the second device and to the second output node, and a second terminal coupled to a reference node; a first charge storage device having a first terminal coupled to the second terminal of the first device, and a second terminal coupled to the reference node; a second charge storage device having a first terminal coupled to the second output node, and a second terminal coupled to the reference node; and a variable load control circuit having a first terminal coupled to the first output node, a second terminal coupled to the second output node, and a third terminal coupled to the reference node, wherein the variable load control circuit includes: a first transistor having control, first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the reference node; a second transistor having control, first and second terminals wherein its first terminal is coupled to the reference node, and its second terminal is coupled to the control terminal of the first transistor; a resistor having a first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the control terminal of the first transistor; and a diode having first and second terminals wherein its first terminal is coupled to the control terminal of the second transistor, and its second terminal is coupled to the second output node.
Claim 35
Independent Claim
325 words
An apparatus, comprising: a switch having a control terminal, an input terminal coupled to an input node, and an output terminal; a first device having a first terminal coupled to the output terminal of the switch, and a second terminal coupled to a first output node; a second device having a first terminal coupled to the first terminal of the first device, and a second terminal coupled to a second output node; an energy recovery device having a first terminal coupled to the second terminal of the second device and to the second output node, and a second terminal coupled to a reference node; a first charge storage device having a first terminal coupled to the second terminal of the first device, and a second terminal coupled to the reference node; a second charge storage device having a first terminal coupled to the second output node, and a second terminal coupled to the reference node; and a variable load control circuit having a first terminal coupled to the first output node, a second terminal coupled to the second output node, and a third terminal coupled to the reference node, wherein the variable load control circuit includes: a first transistor having control, first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the reference node; a second transistor having control, first and second terminals wherein its first terminal is coupled to the reference node, and its second terminal is coupled to the control terminal of the first transistor; a resistor having a first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the control terminal of the first transistor; and a diode having first and second terminals wherein its first terminal is coupled to the control terminal of the second transistor, and its second terminal is coupled to the second output node.
Claim 36
Dependent Claim
19 words
The apparatus of claim 28 wherein the first device comprises an inductor and the second device comprises another diode.
Claim 37
Dependent Claim
14 words
The apparatus of claim 28 wherein the energy recovery device comprises a Zener diode.
Claim 38
Independent Claim
356 words
An apparatus, comprising: a switch having a control terminal, an input terminal coupled to an input node, and an output terminal; a first device having a first terminal coupled to the output terminal of the switch, and a second terminal coupled to a first output node; a second device having a first terminal coupled to the first terminal of the first device, and a second terminal coupled to a second output node; an energy recovery device having a first terminal coupled to the second terminal of the second device and to the second output node, and a second terminal coupled to a reference node; a first charge storage device having a first terminal coupled to the second terminal of the first device, and a second terminal coupled to the reference node; a second charge storage device having a first terminal coupled to the second output node, and a second terminal coupled to the reference node; and a variable load control circuit having a first terminal coupled to the first output node, a second terminal coupled to the second output node, and a third terminal coupled to the reference node, wherein the variable load control circuit includes: a first transistor having control, first and second terminals wherein its first terminal is coupled to the first output node, and the second terminal is coupled to the reference node; a second transistor having control, first and second terminals wherein its first terminal is coupled to the reference node, and its second terminal is coupled to the control terminal of the first transistor; a first resistor having a first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the control terminal of the first transistor; a second resistor having first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the control terminal of the second transistor; and a diode having first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the second output node.
Claim 39
Independent Claim
356 words
An apparatus, comprising: a switch having a control terminal, an input terminal coupled to an input node, and an output terminal; a first device having a first terminal coupled to the output terminal of the switch, and a second terminal coupled to a first output node; a second device having a first terminal coupled to the first terminal of the first device, and a second terminal coupled to a second output node; an energy recovery device having a first terminal coupled to the second terminal of the second device and to the second output node, and a second terminal coupled to a reference node; a first charge storage device having a first terminal coupled to the second terminal of the first device, and a second terminal coupled to the reference node; a second charge storage device having a first terminal coupled to the second output node, and a second terminal coupled to the reference node; and a variable load control circuit having a first terminal coupled to the first output node, a second terminal coupled to the second output node, and a third terminal coupled to the reference node, wherein the variable load control circuit includes: a first transistor having control, first and second terminals wherein its first terminal is coupled to the first output node, and the second terminal is coupled to the reference node; a second transistor having control, first and second terminals wherein its first terminal is coupled to the reference node, and its second terminal is coupled to the control terminal of the first transistor; a first resistor having a first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the control terminal of the first transistor; a second resistor having first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the control terminal of the second transistor; and a diode having first and second terminals wherein its first terminal is coupled to the first output node, and its second terminal is coupled to the second output node.
Claim 40
Dependent Claim
19 words
The apparatus of claim 31 wherein the first device comprises another diode and the second device comprises an inductor.
Claim 41
Dependent Claim
14 words
The apparatus of claim 31 wherein the energy recovery device comprises a Zener diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-11-17 | 2007-05-19 | 2007-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-17 | 2011-05-19 | 2011-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-17 | 2015-05-19 | 2015-11-18 | $7700.00 | Window Closed / Lapsed |