Patent US6038150A successfully refreshed from Google Patents.
US6038150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized rectifier for a multiple output converter
Assignee: Shindengen Electric Manufacturing Co Ltd
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Filing: 1998-03-13
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Granted: 2000-03-14
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Expires: 2018-03-13
Abstract
Abstract A secondary subcircuit of a converter circuit is disclosed where a method and circuit for operating a transistor to prevent reverse conduction of the current in the secondary subcircuit is disclosed. The diode in the secondary subcircuits of the prior art is replaced by a transistor and the circuitry for controlling the transistor is made part of the control circuit (ASIC). The secondary converter subcircuit includes a secondary coil for generating a voltage that passes through a first transistor M1, a capacitor, and a second transistor M2, where the output terminal of the subcircuit is across said capacitor. A presently preferred embodiment of a control circuit detects the voltage level at a sync node and the output voltage level at the output terminal and controls transistors M1 and M2 accordingly in generating the desired voltage level at the output terminal.
Inventors
- 👤 Hsian-Pei Yee
- 👤 Satoru Sawahata
- 👤 Masaru Wakatabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:32
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33561; H02M3/33569; H02M3/33576
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
107 words
A method for generating a voltage potential from a provided energy source, comprising the steps of: generating a first voltage potential from a provided energy source; regulating said first voltage potential to generate a second voltage potential by turning on said first transistor at a point in time before the primary switch for generating said magnetic field turns off, turning off said first transistor at a point in time corresponding to the generation of said second voltage potential; and rectifying said second voltage potential through the use of a second transistor and operating said second transistor as a function of the Vds voltage of said second transistor.
Claim 2
Independent Claim
107 words
A method for generating a voltage potential from a provided energy source, comprising the steps of: generating a first voltage potential from a provided energy source; regulating said first voltage potential to generate a second voltage potential by turning on said first transistor at a point in time before the primary switch for generating said magnetic field turns off, turning off said first transistor at a point in time corresponding to the generation of said second voltage potential; and rectifying said second voltage potential through the use of a second transistor and operating said second transistor as a function of the Vds voltage of said second transistor.
Claim 3
Dependent Claim
16 words
A method as recited in claim 1 wherein said provided energy source is a magnetic field.
Claim 4
Independent Claim
137 words
A method for generating a voltage potential from a provided energy source, comprising the steps of: generating a first voltage potential from a provided energy source; regulating said first voltage potential to generate a second voltage potential; and rectifying said second voltage potential through the use of a second transistor and operating said second transistor as a function of the Vds voltage of said second transistor, said rectifying step including generating a periodic ramp voltage as a function of the voltage for generating said magnetic field and said magnetic field; generating a bias voltage having a voltage potential in the same range as the voltage potential of said ramp voltage; and turning off said second transistor when the voltage potential of said bias voltage is at the same level as the voltage potential of said ramp voltage.
Claim 5
Independent Claim
137 words
A method for generating a voltage potential from a provided energy source, comprising the steps of: generating a first voltage potential from a provided energy source; regulating said first voltage potential to generate a second voltage potential; and rectifying said second voltage potential through the use of a second transistor and operating said second transistor as a function of the Vds voltage of said second transistor, said rectifying step including generating a periodic ramp voltage as a function of the voltage for generating said magnetic field and said magnetic field; generating a bias voltage having a voltage potential in the same range as the voltage potential of said ramp voltage; and turning off said second transistor when the voltage potential of said bias voltage is at the same level as the voltage potential of said ramp voltage.
Claim 6
Dependent Claim
20 words
A method as recited in claim 3 further including the step of sensing the Vds voltage across said second transistor.
Claim 7
Dependent Claim
33 words
A method as recited in claim 4 further including the step of determining the time for turning off said second transistor as a function of the sensed Vds voltage across said second transistor.
Claim 8
Dependent Claim
53 words
A method as recited in claim 5 further including the step of upwardly adjusting said bias voltage to turn off said second transistor at a later point in time when the Vds voltage of said second transistor is at a particular diode voltage potential for a duration greater than a first predefined duration.
Claim 9
Dependent Claim
32 words
A method as recited in claim 6 wherein said particular diode voltage is the forward diode voltage of an external diode connected across the drain and source terminal of said second transistor.
Claim 10
Dependent Claim
22 words
A method as recited in claim 6 wherein said particular diode voltage is the forward body diode voltage of said second transistor.
Claim 11
Dependent Claim
53 words
A method as recited in claim 5 further including the step of downwardly adjusting said bias voltage to turn off said second transistor at an earlier point in time when the Vds voltage of said second transistor is at a particular diode voltage potential for a duration less than a second predefined duration.
Claim 12
Dependent Claim
32 words
A method as recited in claim 9 wherein said particular diode voltage is the forward diode voltage of an external diode connected across the drain and source terminal of said second transistor.
Claim 13
Dependent Claim
22 words
A method as recited in claim 9 wherein said particular diode voltage is the forward body diode voltage of said second transistor.
Claim 14
Dependent Claim
99 words
A converter circuit for generating a secondary voltage potential from a provided energy source, comprising: generating means for generating a first voltage potential from said provided energy source; regulating means including a first transistor for regulating said first voltage potential to generate a second voltage potential; rectifying means including a second transistor for preventing reverse conduction of the current of said second voltage potential, said second transistor being operative to prevent reverse conduction and being operated as a function of the Vds voltage of said second transistor; and control means for operating said regulating means and said rectifying means.
Claim 15
Dependent Claim
99 words
A converter circuit for generating a secondary voltage potential from a provided energy source, comprising: generating means for generating a first voltage potential from said provided energy source; regulating means including a first transistor for regulating said first voltage potential to generate a second voltage potential; rectifying means including a second transistor for preventing reverse conduction of the current of said second voltage potential, said second transistor being operative to prevent reverse conduction and being operated as a function of the Vds voltage of said second transistor; and control means for operating said regulating means and said rectifying means.
Claim 16
Dependent Claim
15 words
A converter circuit as recited in claim 12 wherein said generating means is a coil.
Claim 17
Dependent Claim
42 words
A converter circuit as recited in claim 12 wherein a ramp voltage potential and a bias voltage potential are provided where said second transistor is turned off when said bias voltage potential is at the same level as the ramp voltage potential.
Claim 18
Dependent Claim
46 words
A converter circuit as recited in claim 14 wherein said second transistor is turned off at an earlier point in time when the Vds voltage of said second transistor equals to a particular diode voltage for a duration that is less than a second predefined duration.
Claim 19
Dependent Claim
23 words
A converter circuit as recited in claim 15 wherein said particular diode voltage is the forward body diode voltage of said second transistor.
Claim 20
Dependent Claim
28 words
A converter circuit as recited in claim 15 wherein said particular diode voltage is the forward diode voltage across the drain and source terminals of said second transistor.
Claim 21
Dependent Claim
46 words
A converter circuit as recited in claim 14 wherein said second transistor is turned off at a later point in time when the Vds voltage of said second transistor equals to a particular diode voltage for a duration that is greater than a first predefined duration.
Claim 22
Dependent Claim
28 words
A converter circuit as recited in claim 18 wherein said particular diode voltage is the forward diode voltage across the drain and source terminals of said second transistor.
Claim 23
Dependent Claim
23 words
A converter circuit as recited in claim 18 wherein said particular diode voltage is the forward body diode voltage of said second transistor.
Claim 24
Dependent Claim
139 words
A converter circuit for generating a secondary voltage potential, comprising: a coil responsive to an energy source to generate a first voltage potential, said energy source including a magnetic field; a first transistor connected in series with said coil for regulating said first voltage potential to generate a second voltage potential; a capacitor connected in series with said first transistor; a second transistor connected in series with said capacitor at one terminal and said coil at another terminal; an output terminal across said capacitor for outputting said generated second voltage potential; and a control circuit for operating said first transistor and said second transistor in response to said generated second voltage potential, said control circuit being operative to generate an adjustable bias voltage having a voltage potential in the same range as the voltage potential of said ramp voltage.
Claim 25
Dependent Claim
139 words
A converter circuit for generating a secondary voltage potential, comprising: a coil responsive to an energy source to generate a first voltage potential, said energy source including a magnetic field; a first transistor connected in series with said coil for regulating said first voltage potential to generate a second voltage potential; a capacitor connected in series with said first transistor; a second transistor connected in series with said capacitor at one terminal and said coil at another terminal; an output terminal across said capacitor for outputting said generated second voltage potential; and a control circuit for operating said first transistor and said second transistor in response to said generated second voltage potential, said control circuit being operative to generate an adjustable bias voltage having a voltage potential in the same range as the voltage potential of said ramp voltage.
Claim 26
Dependent Claim
27 words
A converter circuit as recited in claim 21 wherein said control circuit generates a ramp voltage as a function of the voltage for generating the magnetic field.
Claim 27
Dependent Claim
53 words
A converter circuit as recited in claim 21 wherein a primary switch operates a primary coil to generate said magnetic field and said control circuit operates said first transistor in generating said second voltage potential and turns on said first transistor at a point in time before said primary switch is turned off.
Claim 28
Dependent Claim
40 words
A converter circuit as recited in claim 21 wherein said control circuit operates said first transistor in generating said second voltage potential and turns off said first transistor at a point in time before said primary switch is turned on.
Claim 29
Dependent Claim
36 words
A converter circuit as recited in claim 21 wherein said second transistor is turned off when the voltage potential of said bias voltage is at the same level as the voltage potential of said ramp voltage.
Claim 30
Dependent Claim
57 words
A converter circuit as recited in claim 25 wherein said control circuit downwardly adjusts said bias voltage to a lower potential to turn off said second transistor at an earlier point in time when the Vds voltage of said second transistor is at a particular diode voltage potential for a duration less than a second predefined duration.
Claim 31
Dependent Claim
23 words
A converter circuit as recited in claim 26 wherein said particular diode voltage is the forward body diode voltage of said second transistor.
Claim 32
Dependent Claim
28 words
A converter circuit as recited in claim 26 wherein said particular diode voltage is the forward diode voltage across the drain and source terminals of said second transistor.
Claim 33
Dependent Claim
16 words
A converter circuit as recited in claim 26 where said second predefined duration is 20 ns.
Claim 34
Dependent Claim
58 words
A converter circuit as recited in claim 15 wherein said control circuit upwardly adjusts said bias voltage to a higher voltage potential to turn off said second transistor at a later point in time when the Vds voltage of said second transistor is at a particular diode voltage potential for a duration greater than a first predefined duration.
Claim 35
Dependent Claim
23 words
A converter circuit as recited in claim 30 wherein said particular diode voltage is the forward body diode voltage of said second transistor.
Claim 36
Dependent Claim
28 words
A converter circuit as recited in claim 30 wherein said particular diode voltage is the forward diode voltage across the drain and source terminals of said second transistor.
Claim 37
Dependent Claim
16 words
A converter circuit as recited in claim 30 where said first predefined duration is 100 ns.
Claim 38
Dependent Claim
26 words
A converter circuit as recited in claim 21 wherein said control circuit operates said second transistor as a function of the Vds of said second transistor.
References Cited (Backward Citations)
US3582758A
Cited
US4870555A
Cited
US4922404A
Cited
US5144547A
Cited
US5528480A
Cited
US5774350A
Cited
US5734563A
Cited
US5742491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-14 | 2003-09-13 | 2004-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-14 | 2007-09-13 | 2008-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-14 | 2011-09-13 | 2012-03-14 | $7700.00 | Window Closed / Lapsed |