US3843907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable over-current detector
Assignee: Bull HN Information Systems Italia SpA
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Filing: 1973-11-07
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Granted: 1974-10-22
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Expires: 1993-11-07
Abstract
Abstract An over-current detector monitors the current delivered by each section of a multi-section switching regulator and provides a signal for disabling the switching regulator when the current in any one of the sections exceeds a threshold value. The threshold value is adjustable so that the multi-section switching regulator can be used to safely deliver a wide range of values of current.
Inventors
- 👤 L Genuit
- 👤 J Nowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5157; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/1213
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
An over-current detector for use with a switching regulator, said detector comprising: first and second input terminals; a current transformer having a primary winding and a secondary winding, said first input terminal being connected to a first end of said primary winding, said second input terminal being connected to a second end of said primary winding; first and second diodes each having an anode and a cathode, said anode of said first diode being connected to a first end of said secondary winding, said anode of said second diode being connected to a second end of said secondary winding; first, second and third resistors, said first resistor being connected between said cathode of said second diode and said first end of said secondary winding, said second resistor being connected between said cathode of said first diode and said second end of said secondary winding; a voltage comparator having first and second input leads and an output lead, said third resistor being connected between said cathode of said first diode and said first input lead of said comparator; a capacitor, said capacitor being connected between said first input lead of said comparator and said second end of said secondary winding; and a reference potential, said potential being coupled to said second input lead of said comparator.
Claim 2
Dependent Claim
215 words
An over-current detector for use with a switching regulator, said detector comprising: first and second input terminals; a current transformer having a primary winding and a secondary winding, said first input terminal being connected to a first end of said primary winding, said second input terminal being connected to a second end of said primary winding; first and second diodes each having an anode and a cathode, said anode of said first diode being connected to a first end of said secondary winding, said anode of said second diode being connected to a second end of said secondary winding; first, second and third resistors, said first resistor being connected between said cathode of said second diode and said first end of said secondary winding, said second resistor being connected between said cathode of said first diode and said second end of said secondary winding; a voltage comparator having first and second input leads and an output lead, said third resistor being connected between said cathode of said first diode and said first input lead of said comparator; a capacitor, said capacitor being connected between said first input lead of said comparator and said second end of said secondary winding; and a reference potential, said potential being coupled to said second input lead of said comparator.
Claim 3
Dependent Claim
386 words
An over-current detector for use with a dual switching regulator, said detector comprising: first and second current transformers each having a primary winding and a secondary winding; first, second, third and fourth input terminals, said first terminal being connected to a first end of said primary winding of said first transformer, said second terminal being connected to a second end of said primary winding of said first transformer, said third terminal being connected to a first end of said primary winding of said second transformer, said fourth terminal being connected to a second end of said primary winding of said second transformer; first and second rectifiers each having an anode and a cathode, said anode of said first rectifier being connected to a first end of said secondary winding of said first transformer, said anode of said second rectifier being connected to a first end of said secondary winding of said second transformer; first and second resistors, said first resistor being connected between said cathode of said first rectifier and a second end of said primary winding of said first transformer, said second resistor being connected between said cathode of said second rectifier and a second end of said primary winding of said second transformer; first and second integrator circuits each having first and second input leads and an output lead, said first input lead of each of said circuits being connected To said cathode of a corresponding one of said rectifiers, said second input lead of each of said circuits being connected to said second ends of said secondary winding of said first and said second transformers; first and second voltage comparators each having first and second input leads and an output lead, said first input lead of said first comparator being connected to said output lead of said first circuit, said first input lead of said second comparator being connected to said output lead of said second circuit; a reference potential, said potential being coupled to said second input leads of said first and said second comparators; and an OR-gate having first and second input leads and an output lead, said first input lead of said gate being connected to said output lead of said first comparator, said second input lead of said gate being connected to said output lead of said second comparator.
Claim 4
Dependent Claim
386 words
An over-current detector for use with a dual switching regulator, said detector comprising: first and second current transformers each having a primary winding and a secondary winding; first, second, third and fourth input terminals, said first terminal being connected to a first end of said primary winding of said first transformer, said second terminal being connected to a second end of said primary winding of said first transformer, said third terminal being connected to a first end of said primary winding of said second transformer, said fourth terminal being connected to a second end of said primary winding of said second transformer; first and second rectifiers each having an anode and a cathode, said anode of said first rectifier being connected to a first end of said secondary winding of said first transformer, said anode of said second rectifier being connected to a first end of said secondary winding of said second transformer; first and second resistors, said first resistor being connected between said cathode of said first rectifier and a second end of said primary winding of said first transformer, said second resistor being connected between said cathode of said second rectifier and a second end of said primary winding of said second transformer; first and second integrator circuits each having first and second input leads and an output lead, said first input lead of each of said circuits being connected To said cathode of a corresponding one of said rectifiers, said second input lead of each of said circuits being connected to said second ends of said secondary winding of said first and said second transformers; first and second voltage comparators each having first and second input leads and an output lead, said first input lead of said first comparator being connected to said output lead of said first circuit, said first input lead of said second comparator being connected to said output lead of said second circuit; a reference potential, said potential being coupled to said second input leads of said first and said second comparators; and an OR-gate having first and second input leads and an output lead, said first input lead of said gate being connected to said output lead of said first comparator, said second input lead of said gate being connected to said output lead of said second comparator.
Claim 5
Dependent Claim
113 words
An over-current detector as defined in claim 2 including: third and fourth rectifiers each having an anode and a cathode, said anode of said third rectifier being connected to said second end of said secondary winding of said first transformer, said anode of said fourth rectifier being connected to said second end of said secondary winding of said second transformer; and third and fourth resistors, said third resistor being connected between said cathode of said third rectifier and said first end of said secondary winding of said first transformer, said fourth resistor being connected between said cathode of said fourth rectifier and said first end of said secondary winding of said second transformer.
Claim 6
Dependent Claim
177 words
An over-current detector as defined in claim 2 including: third and fourth rectifiers each having an anode and a cathode, said anode of said third rectifier being connected to said second end of said secondary winding of said first transformer, said anode of said fourth rectifier being connected to said second end of said secondary winding of said second transformer; third and fourth resistors, said third resistor being connected between said cathode of said third rectifier and said first end of said secondary winding of said first transformer, said fourth resistor being connected between said cathode of said fourth rectifier and said first end of said secondary winding of said second transformer; and a potentiometer having first and second input leads and an output lead, said first input lead of said potentiometer being connected to said reference potential, said second input lead of said potentiometer being connected to said anodes of said third and said fourth rectifiers, said output lead of said potentiometer being connected to said second input leads of said first and said second comparators.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |