US3775667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic integrable series stabilization circuit
Assignee: TDK Micronas GmbH
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Filing: 1973-03-12
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Granted: 1973-11-27
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Expires: 1993-03-12
Abstract
Abstract A series stabilization circuit to generate a regulated voltage with a leakage current in the order of a few microamperes. To provide the low leakage current a constant current source is provided that feeds the common connection point of the base of the auxiliary transistor amplifier and the collector of the reference transistor amplifier.
Inventors
- 👤 F Bartos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:05
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
291 words
A monolithic integrable series stabilization circuit for generating a stabilized constant amplitude output voltage in the order of 1 volt from a variable amplitude input voltage comprising: a main transistor having an emitter, base and collector, said emitter coupled to the input voltage and said collector coupled to the output voltage; a voltage divider having a tapping point, said voltage divider coupled between ground and the output voltage; a reference transistor of the same conductivity type as the main transistor having an emitter, base and collector, the baseemiiter voltage thereof serving as a reference voltage, said base of said reference transistor coupled to said tapping point and said emitter of said reference transistor coupled to the stabilized output voltage; an auxiliary transistor of the same conductivity type as the main transistor having an emitter coupled to the base of said main transistor, a base coupled to the collector of said reference transistor and a collector coupled to ground; a constant current transistor having a conductivity complementary to said main, reference and auxiliary transistors having an emitter, base and collector, said collector of said constant current transistor coupled to and supplying a constant current to the base of said auxiliary transistor and the collector of said reference transistor, and said emitter of said constant current transistor coupled to ground; a constant voltage transistor of the same conductivity type as said constant current transistor having an emitter, base and collector, said emitter of said constant voltage transistor coupled to ground, and said base of said constant voltage transistor coupled to the base of said constant current transistor and to the collector of said Constant voltage transistor; and a dropping resistor coupled between said input voltage and the collector of said constant voltage transistor.
Claim 2
Dependent Claim
291 words
A monolithic integrable series stabilization circuit for generating a stabilized constant amplitude output voltage in the order of 1 volt from a variable amplitude input voltage comprising: a main transistor having an emitter, base and collector, said emitter coupled to the input voltage and said collector coupled to the output voltage; a voltage divider having a tapping point, said voltage divider coupled between ground and the output voltage; a reference transistor of the same conductivity type as the main transistor having an emitter, base and collector, the baseemiiter voltage thereof serving as a reference voltage, said base of said reference transistor coupled to said tapping point and said emitter of said reference transistor coupled to the stabilized output voltage; an auxiliary transistor of the same conductivity type as the main transistor having an emitter coupled to the base of said main transistor, a base coupled to the collector of said reference transistor and a collector coupled to ground; a constant current transistor having a conductivity complementary to said main, reference and auxiliary transistors having an emitter, base and collector, said collector of said constant current transistor coupled to and supplying a constant current to the base of said auxiliary transistor and the collector of said reference transistor, and said emitter of said constant current transistor coupled to ground; a constant voltage transistor of the same conductivity type as said constant current transistor having an emitter, base and collector, said emitter of said constant voltage transistor coupled to ground, and said base of said constant voltage transistor coupled to the base of said constant current transistor and to the collector of said Constant voltage transistor; and a dropping resistor coupled between said input voltage and the collector of said constant voltage 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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |