US3786339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-regenerative switching voltage regulator
Assignee: Individual
•
Filing: 1970-12-30
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Granted: 1974-01-15
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Expires: 1990-12-30
Abstract
Abstract A non-regenerative switching voltage regulator and filter circuit for converting a pulsating DC input voltage to a regulated DC output voltage. Also a non-regenerative switching voltage regulator and filter circuit for converting a pulsating DC input voltage to a regulated and well filtered DC output voltage by use of an additional series type regulator, coupled to the same reference voltage as mentioned non-regenerative switching voltage regulator and filter circuit. The reference voltage embodied in the form of a Zener diode compensates for temperature changes in the circuit in both mentioned arrangements. In addition, for purpose of better switching and the base-emitter junction protection of the series pass transistor from conductive into non-conductive state a protective resistor is connected across said base-emitter junction. Invention uses no inductance in any form, heatsinks for power transistors are minimized and overall efficiency is good.
Inventors
- 👤 S Milovancevic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:46
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/1563; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/563
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
234 words
A non-regenerative switching voltage regulator and filter circuit for converting a pulsating DC input voltage to a regulated DC output voltage and including a common terminal and an input terminal for receiving said input voltage, and an output terminal for delivering said output voltage, comprising: first series pass regulating transistor having its emittercollector circuit in series between said input terminal and a collector-emitter circuit of a second series pass regulting transistor having its emittercollector circuit connected also to said output terminal, a reference voltage source having one terminal thereof connected to said common terminal, a switching control means connected between the other terminal of said voltage reference source and the base of said first regulating transistor for switching said regulating transistor out of conduction periodically during each pulsation of said input DC voltage, a storage capacitor interconnected between series connection of said first and said second regulating transistor and said common terminal, a diode interposed between the base of said first regulating transistor and said switching means, a resistor interposed between the base and the emitter electrodes of said first regulating transistor, a resistor interposed between said input terminal and interconnection of said switching control means and said diode being connected to the base of said first regulating transistor, a resistor interconnected between control electrode of said switching control means and interconnection of said first and said second regulating transistor and said storage capacitor.
Claim 2
Dependent Claim
234 words
A non-regenerative switching voltage regulator and filter circuit for converting a pulsating DC input voltage to a regulated DC output voltage and including a common terminal and an input terminal for receiving said input voltage, and an output terminal for delivering said output voltage, comprising: first series pass regulating transistor having its emittercollector circuit in series between said input terminal and a collector-emitter circuit of a second series pass regulting transistor having its emittercollector circuit connected also to said output terminal, a reference voltage source having one terminal thereof connected to said common terminal, a switching control means connected between the other terminal of said voltage reference source and the base of said first regulating transistor for switching said regulating transistor out of conduction periodically during each pulsation of said input DC voltage, a storage capacitor interconnected between series connection of said first and said second regulating transistor and said common terminal, a diode interposed between the base of said first regulating transistor and said switching means, a resistor interposed between the base and the emitter electrodes of said first regulating transistor, a resistor interposed between said input terminal and interconnection of said switching control means and said diode being connected to the base of said first regulating transistor, a resistor interconnected between control electrode of said switching control means and interconnection of said first and said second regulating transistor and said storage capacitor.
Claim 3
Dependent Claim
28 words
The circuit of claim 1 and further including: a resistor for coupling said other terminal of said reference voltage source to the base of said second regulating transistor.
Claim 4
Dependent Claim
43 words
The circuit of claim 2 and further including : a diode connected between said input terminal and said emitter-collector circuit of said first regulating transistor and another storage capacitor connected between common terminal and interconnection between said diode and said first regulating transistor.
References Cited (Backward Citations)
GB980631A
Cited
US3204175A
Cited
US3218542A
Cited
US3284692A
Cited
US3373341A
Cited
US3373344A
Cited
US3505583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |