US3760256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous dc power supply
Assignee: United States Department of the Army
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Filing: 1972-07-31
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Granted: 1973-09-18
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Expires: 1992-07-31
Abstract
Abstract A synchronous direct current (dc) power supply has the power supply input drive synchronized with the pulse repetition frequency (PRF) of the amplifying or load circuit requiring the dc power for operation. This limits the occurrence of ripple components in the power supply output to the spectral positions of the PRF lines, eliminating ripple interference with signal processing in the load. An astable multivibrator is synchronized with the PRF generator output frequency. The multivibrator output is converted to a square wave, filtered, and processed to provide a fully rectified output voltage for coupling to the desired load circuit.
Inventors
- 👤 G Rast
- 👤 T Barley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:33
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14; G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282; H04; H04B; H04B15/00; H04B15/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
A synchronous dc power supply for supplying an output signal having ripple components synchronous with a predetermined input signal and comprising: a high frequency alternating current power source having an input and an output, an ac-to-dc converter having an input connected to the output of said power source and an output for coupling to a load circuit, and a pulse repetition frequency generator coupled to said power source input for coupling said predetermined input signal thereto.
Claim 2
Dependent Claim
76 words
A synchronous dc power supply for supplying an output signal having ripple components synchronous with a predetermined input signal and comprising: a high frequency alternating current power source having an input and an output, an ac-to-dc converter having an input connected to the output of said power source and an output for coupling to a load circuit, and a pulse repetition frequency generator coupled to said power source input for coupling said predetermined input signal thereto.
Claim 3
Dependent Claim
76 words
A synchronous dc power supply as set forth in claim 1 wherein said ac power source comprises a multivibrator having an input coupled as said power source input and an output, a flip-flop coupled to the output of said multivibrator for providing a square wave drive signal, a filter connected to receive said drive signal for converting said square wave to a sine wave, and an output of said filter being coupled to said converter input.
Claim 4
Dependent Claim
86 words
A synchronous dc power supply as set forth in claim 2 wherein said multivibrator is astable and said converter comprises an amplifier, a transformer, a rectifier, and a low-pass filter; the output of said amplifier being coupled as a transformer input, the transformer output being coupled to said rectifier and the output of said rectifier being coupled to said low-pass filter; the input of said converter being connected as an input to said amplifier and the output being coupled from said low-pass filter to load circuitry.
Claim 5
Dependent Claim
36 words
A synchronous dc power supply as set forth in claim 3 wherein said rectifier is full wave and the output of said low-pass filter is coupled back to said amplifier for providing automatic gain control thereto.
Claim 6
Dependent Claim
35 words
A synchronous dc power supply as set forth in claim 4 and further comprising a plurality of ac to dc converters connected to said power supply filter output for providing predetermined voltage level output signals.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |