Patent US3671852A successfully refreshed from Google Patents.
US3671852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Series transistor power supply regulator
Assignee: HP Inc
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Filing: 1971-09-01
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Granted: 1972-06-20
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Expires: 1991-09-01
Abstract
Abstract A power supply regulator of the series transistor type employing a current limiter transistor circuit coupled to the output of the series transistor and a constant current supply comprising a transistor and Zener diode for supplying current to the current limiter transistor circuit, and a voltage multiplier circuit coupled to the rectifier circuit input of the regulator circuit, said constant current supply being coupled to said voltage multiplier circuit.
Inventors
- 👤 Jean Ritzenthaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:36
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/575
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A series regulator circuit comprising a full wave rectifier circuit coupled to the AC input, an output line, a current regulating transistor coupled in series between said rectifier circuit and said output line; a current transistor circuit coupled between said series regulating transistor and said output line, and a constant current supply including a transistor and Zener diode coupled to said rectifier circuit for supplying current to the collector-emitter circuit of said current limiter transistor, the improvement comprising a voltage multiplier circuit coupled to said full wave rectifier circuit for producing a voltage higher than that coupled to said series transistor, the elevated voltage output of said voltage doubler circuit being coupled to said constant current supply.
Claim 2
Dependent Claim
117 words
A series regulator circuit comprising a full wave rectifier circuit coupled to the AC input, an output line, a current regulating transistor coupled in series between said rectifier circuit and said output line; a current transistor circuit coupled between said series regulating transistor and said output line, and a constant current supply including a transistor and Zener diode coupled to said rectifier circuit for supplying current to the collector-emitter circuit of said current limiter transistor, the improvement comprising a voltage multiplier circuit coupled to said full wave rectifier circuit for producing a voltage higher than that coupled to said series transistor, the elevated voltage output of said voltage doubler circuit being coupled to said constant current supply.
Claim 3
Dependent Claim
83 words
A series regulator circuit as claimed in claim 1 wherein the collector-emitter circuit of said series regulator transistor is coupled in series between said rectifier circuit and said output line, a second transistor having its collector-emitter circuit coupled across the collector-base circuit of said series regulator transistor, the collector-emitter circuit of said current limiter transistor being coupled to the base of said second transistor to control the current flow through said second transistor and thus the current flow through said series regulator transistor.
Claim 4
Dependent Claim
69 words
A series regulator as claimed in claim 1 wherein said full wave rectifier circuit includes the secondary winding of an input transformer, said voltage doubler circuit comprising a first capacitor and first diode connected in series across said secondary winding, and a second capacitor and second diode connected in series between the junction of said first capacitor and said first diode and the high side of said rectifier circuit.
Claim 5
Dependent Claim
39 words
A series regulator circuit as claimed in claim 3 including a Zener diode and a resistor connected in series across said second capacitor, said constant current supply circuit being coupled to the junction between said Zener diode and resistor.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |