US3155838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse-width modulator
Assignee: RTX Corp
•
Filing: 1960-05-20
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Granted: 1964-11-03
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Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Charles B Brahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:36
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/26; G05B11/28; H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806; H02M7/539
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A POWER REGULATING SYSTEM FOR A STATIC INVERTER COMPRISING AN ALTERNATING INPUT SIGNAL OF CONSTANT FREQUENCY, MEANS FOR CONVERTING SAID INPUT SIGNAL INTO A CONSTANT FREQUENCY TRIANGULAR WAVE, AMPLIFER CIRCUIT, MEANS FOR SUPPLYING SAID TRIANGULAR WAVE TO SAID AMPLIIFER CIRCUIT TO PRODUCE A SERIES OF PULSED SIGNALS HAVING A WIDTH PROPORTIONAL TO THE VOLTAGE LEVEL OF SAID TRIANGULAR WAVE, MEANS FOR CONVERTING SAID SERIES OF PULSED SIGNALS INTO A SUBSTANTIALLY SINUSOIDAL OUTPUT VOLTAGE, MEANS FOR PRODUCING A CONSTANT AMPLITUDE REFERENCE VOLTAGE FROM SAID SINUSOIDAL OUTPUT VOLTAGE, MEANS FOR COMPARING SAID OUTPUT VOLTAGE WITH SAID REFERENCE VOLTAGE TO PRODUCE AN ERROR SIGNAL, AND MEANS FOR APPLYING SAID ERROR SIGNAL AS A BIAS TO SAID TRIANGULAR WAVE TO VARY THE VOLTAGE LEVEL OF SAID TRIANGULAR WAVE AND THEREBY REGULATE SAID OUTPUT VOLTAGE.
Claim 2
Dependent Claim
130 words
A POWER REGULATING SYSTEM FOR A STATIC INVERTER COMPRISING AN ALTERNATING INPUT SIGNAL OF CONSTANT FREQUENCY, MEANS FOR CONVERTING SAID INPUT SIGNAL INTO A CONSTANT FREQUENCY TRIANGULAR WAVE, AMPLIFER CIRCUIT, MEANS FOR SUPPLYING SAID TRIANGULAR WAVE TO SAID AMPLIIFER CIRCUIT TO PRODUCE A SERIES OF PULSED SIGNALS HAVING A WIDTH PROPORTIONAL TO THE VOLTAGE LEVEL OF SAID TRIANGULAR WAVE, MEANS FOR CONVERTING SAID SERIES OF PULSED SIGNALS INTO A SUBSTANTIALLY SINUSOIDAL OUTPUT VOLTAGE, MEANS FOR PRODUCING A CONSTANT AMPLITUDE REFERENCE VOLTAGE FROM SAID SINUSOIDAL OUTPUT VOLTAGE, MEANS FOR COMPARING SAID OUTPUT VOLTAGE WITH SAID REFERENCE VOLTAGE TO PRODUCE AN ERROR SIGNAL, AND MEANS FOR APPLYING SAID ERROR SIGNAL AS A BIAS TO SAID TRIANGULAR WAVE TO VARY THE VOLTAGE LEVEL OF SAID TRIANGULAR WAVE AND THEREBY REGULATE SAID OUTPUT VOLTAGE.
References Cited (Backward Citations)
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US2891726A
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US2983872A
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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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |