US4126891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching regulator with feedback system for regulating output current
Assignee: Sony Corp
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Filing: 1976-12-17
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Granted: 1978-11-21
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Expires: 1996-12-17
Abstract
Abstract A switching regulator includes a chopper circuit and a DC-DC converter. A switching signal for use with the chopper circuit is derived from an inverter portion of the DC-DC converter so as not to use an external pulse oscillator. A DC voltage feeback circuit is provided from the output of the DC-DC converter to the chopper circuit so as to stabilize the DC output signal of the DC-DC converter.
Inventors
- 👤 Tadao Suzuki
- 👤 Shigeaki Wachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:30
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/165; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M3/3385; H02M3/3387
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A switching regulator comprising: (a) a DC voltage source means; (b) first switching means supplied with the output of said DC voltage source means and producing a first pulse signal; (c) a pulse width modulator for applying a pulse width modulation signal to said first switching means; (d) a low pass filter supplied with said first pulse signal and producing a first DC voltage; (e) second switching means supplied with said first DC voltage and producing a second pulse signal across an output transformer having primary and secondary windings; (f) a rectifier circuit supplied with said second pulse signal and producing a second DC voltage; and (g) feedback circuit means connected between further separate secondary winding means of said output transformer and said pulse width modulator for supplying a DC voltage feedback signal and a separate synchronizing control pulse signal to said pulse width modulator in response to said second pulse signal.
Claim 2
Dependent Claim
152 words
A switching regulator comprising: (a) a DC voltage source means; (b) first switching means supplied with the output of said DC voltage source means and producing a first pulse signal; (c) a pulse width modulator for applying a pulse width modulation signal to said first switching means; (d) a low pass filter supplied with said first pulse signal and producing a first DC voltage; (e) second switching means supplied with said first DC voltage and producing a second pulse signal across an output transformer having primary and secondary windings; (f) a rectifier circuit supplied with said second pulse signal and producing a second DC voltage; and (g) feedback circuit means connected between further separate secondary winding means of said output transformer and said pulse width modulator for supplying a DC voltage feedback signal and a separate synchronizing control pulse signal to said pulse width modulator in response to said second pulse signal.
Claim 3
Dependent Claim
58 words
A switching regulator according to claim 1 in which the output transformer separate secondary winding means are a separate feedback voltage detecting winding producing the DC voltage feedback signal and a separate synchronizing winding producing the synchronizing control pulse signal, a separate voltage rectifier and filter being provided between the voltage detecting winding and the pulse width modulator.
Claim 4
Dependent Claim
29 words
A switching regulator according to claim 1 in which said second switching means are part of an inverter and said separate synchronizing control pulse signal also feeds the inverter.
Claim 5
Dependent Claim
80 words
A switching regulator according to claim 1, in which said pulse width modulator comprises: (a) an integrator supplied with said synchronizing control pulse signal so as to produce a triangular waveform signal; (b) a summing circuit for receiving said triangular waveform signal and said DC voltage feedback signal and for producing an output signal; and (c) a differential amplifier supplied with the output signal of said summing circuit and a reference DC voltage so as to produce said PWM signal.
Claim 6
Dependent Claim
44 words
A switching regulator according to claim 4, in which said output transformer includes a first detecting winding for producing said synchronizing control pulse signal and a second detecting winding for producing a pulse signal which is rectified to produce said DC voltage feedback signal.
Claim 7
Dependent Claim
149 words
A switching regulator according to claim 4, in which said first switching means includes a first transistor with the collector and emitter electrodes connected in series between one terminal of said DC voltage source and one terminal of a L-C type low pass filter, and said pulse width modulator differential amplifier comprises second and third transistors each having base, emitter and collector electrodes, the emitter electrodes thereof being connected to each other and to a reference point through an emitter impedance, the base electrode of said second transistor being supplied with said reference DC voltage, the collector of said second transistor being connected to the base electrode of said first transistor, the base electrode of said third transistor being supplied with the output signal of said summing circuit and the collector electrode of said third transistor being connected to the output side of said L-C type low pass filter.
Claim 8
Dependent Claim
18 words
A switching regulator according to claim 6, in which said first transistor is comprised in a darlington-connected circuit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |