US4048552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digitally regulated inverter
Assignee: AT&T Inc
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Filing: 1976-02-12
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Granted: 1977-09-13
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Expires: 1996-02-12
Abstract
Abstract An inverter for direct current power generation is shown in which both voltage regulation and logical control of the output are achieved by digitally controlling the application of clock signals to the inverter circuit. A standard clock source is used to drive the inverter and digital circuitry, timed from the same clock source, is used to control the gating of clock pulses to the inverter. Entire clock pulses including both positive going and negative going transitions are blocked so as to preserve the balanced excitation of the inverter transformer. Logical control signals can also be used to disable the application of clock pulses.
Inventors
- 👤 Dale Eugene Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:49
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/001; H04M19/008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
A digitally-controlled inverter comprising: a source of clock pulses, a transformer responsive to said clock pulses, a rectifier connected to the output of said transformer, means for inhibiting only one or more successive full cycles of said clock pulses, and means responsive to the output of said rectifier for controlling said inhibiting means.
Claim 2
Dependent Claim
53 words
A digitally-controlled inverter comprising: a source of clock pulses, a transformer responsive to said clock pulses, a rectifier connected to the output of said transformer, means for inhibiting only one or more successive full cycles of said clock pulses, and means responsive to the output of said rectifier for controlling said inhibiting means.
Claim 3
Dependent Claim
27 words
The digitally-controlled inverter according to claim 1 wherein said controlling means includes binary logic circuits, and a source of binary control signals to control said logic circuits.
Claim 4
Dependent Claim
41 words
The digitally-controlled inverter according to claim 1 wherein said controlling means includes an analog comparison circuit for comparing said output of said rectifier with a reference voltage, and means for generating a binary control signal in response to said comparison circuit.
Claim 5
Dependent Claim
31 words
The digitally-controlled inverter according to claim 1 wherein said source of clock pulses includes means responsive to the loss of pulses from said source for blocking the operation of said inverter.
Claim 6
Dependent Claim
57 words
A regulated inverter comprising: a clock pulse source, a transformer responsive to said clock pulse source, a rectifier connected to the output of said transformer, a source of reference voltage, a comparator for comparing said reference voltage and the output of said rectifier, and means responsive to said comparator for blocking entire clock pulses from said source.
Claim 7
Dependent Claim
57 words
A regulated inverter comprising: a clock pulse source, a transformer responsive to said clock pulse source, a rectifier connected to the output of said transformer, a source of reference voltage, a comparator for comparing said reference voltage and the output of said rectifier, and means responsive to said comparator for blocking entire clock pulses from said source.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |