Patent US3723852A successfully refreshed from Google Patents.
US3723852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output voltage adjusting circuit
Assignee: Superior Electric Co
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Filing: 1972-05-05
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Granted: 1973-03-27
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Expires: 1992-05-05
Abstract
Abstract A circuit connectible to an integrated circuit fixed voltage D.C. regulator for providing an adjustable value of output voltage to a load, especially a load consisting of an incandescent lamp.
Inventors
- 👤 T Peterson
- 👤 I Giguere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
An adjustable D.C. voltage regulating circuit connectible to a D.C. input source for providing an output voltage adjustable in value comprising a semiconductor voltage regulator means having an input, output and common terminals and having the input terminal being connectible to the positive input source to provide a constant value of voltage between the common and the output terminals with the common terminal being negative with respect to the output terminal and with a quiescent current normally flowing from the common terminal, a potential divider connected between the output terminal and the ground of the source and across which the desired value of output voltage appears, said divider including an adjustable resistance having a tap with a first portion being connected between the output terminal and the tap and a second portion being connected between the tap and the ground,a shunt path connected between the common terminal and the ground and means for maintaining a selected value of voltage across the first portion of the divider.
Claim 2
Dependent Claim
166 words
An adjustable D.C. voltage regulating circuit connectible to a D.C. input source for providing an output voltage adjustable in value comprising a semiconductor voltage regulator means having an input, output and common terminals and having the input terminal being connectible to the positive input source to provide a constant value of voltage between the common and the output terminals with the common terminal being negative with respect to the output terminal and with a quiescent current normally flowing from the common terminal, a potential divider connected between the output terminal and the ground of the source and across which the desired value of output voltage appears, said divider including an adjustable resistance having a tap with a first portion being connected between the output terminal and the tap and a second portion being connected between the tap and the ground,a shunt path connected between the common terminal and the ground and means for maintaining a selected value of voltage across the first portion of the divider.
Claim 3
Dependent Claim
45 words
The invention as defined in claim 1 in which the shunt path includes a transistor having an emitter collector path with the emitter being connected to the common terminal and with the emitter collector path being connected between the said common terminal and the ground.
Claim 4
Dependent Claim
36 words
The invention as defined in claim 2 in which there are means for causing the transistor to be conducting during the flow of quiescent current and the shunt path carries substantially all of the quiescent current.
Claim 5
Dependent Claim
62 words
The invention as defined in claim 1 in which the shunt path has a transistor connected as in an emitting follower connection, means for placing a fixed value of voltage from the output terminal at the emitter and in which the selected value of voltage is the fixed value less the diode voltage drop between the base and emitter of the transistor.
Claim 6
Dependent Claim
41 words
The invention as defined in claim 1 in which the last named means includes a transistor, a connection between the tap and the base of the transistor and a resistor connected between the output terminal and the emitter of the transistor.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |