Patent US3139595A successfully refreshed from Google Patents.
US3139595A
Expired / Lapsed
US
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Variable pulse width generator
Assignee: Control Data Corp
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Filing: 1960-02-24
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Granted: 1964-06-30
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Expires: 1980-02-24
Abstract
No abstract record available.
Inventors
- 👤 Gene D Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:09
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PULSE WIDTH MODULATOR INCLUDING A FREE RUNNING BLOCKING OSCILLATOR ADAPTED TO GENERATE OUTPUT PULSES OF VARIABLE WIDTH IN ACCORDANCE WITH THE MAGNITUDE OF AN INPUT SIGNAL, SAID OSCILLATOR INCLUDING A MAGNETIC CORE, MEANS RESPONSIVE TO THE OUTPUT OF SAID OSCILLATOR FOR SUCCESSIVELY VARYING THE MAGNETIC FLUX IN SAID CORE IN A PREDETERMINED SENSE, AND MEANS RESPONSIVE TO SAID INPUT SIGNAL FOR ESTABLISHING A QUIESCENT MAGNETIC FLUX IN SAID CORE PROPORTIONAL TO SAID INPUT SIGNAL, ADDITIONAL MEANS ASSOCIATED WITH SAID MAGNETIC CORE FOR MAGNETICALLY BIASING SAID CORE TO HAVE A QUIESCENT MAGNETIC OPERATING POINT OF ZERO FLUX DENSITY, WHEREBY THE SENSITIVITY OF SAID CIRCUIT TO SAID INPUT SIGNAL IS INCREASED, AND OUTPUT MEANS RESPONSIVE TO THE RESULTANT MAGNETIC FLUX CHANGE IN SAID CORE FOR PROVIDING OUTPUT PULSES EACH HAVING A WIDTH RELATED TO THE MAGNITUDE OF SAID INPUT SIGNAL.
Claim 2
Dependent Claim
139 words
A PULSE WIDTH MODULATOR INCLUDING A FREE RUNNING BLOCKING OSCILLATOR ADAPTED TO GENERATE OUTPUT PULSES OF VARIABLE WIDTH IN ACCORDANCE WITH THE MAGNITUDE OF AN INPUT SIGNAL, SAID OSCILLATOR INCLUDING A MAGNETIC CORE, MEANS RESPONSIVE TO THE OUTPUT OF SAID OSCILLATOR FOR SUCCESSIVELY VARYING THE MAGNETIC FLUX IN SAID CORE IN A PREDETERMINED SENSE, AND MEANS RESPONSIVE TO SAID INPUT SIGNAL FOR ESTABLISHING A QUIESCENT MAGNETIC FLUX IN SAID CORE PROPORTIONAL TO SAID INPUT SIGNAL, ADDITIONAL MEANS ASSOCIATED WITH SAID MAGNETIC CORE FOR MAGNETICALLY BIASING SAID CORE TO HAVE A QUIESCENT MAGNETIC OPERATING POINT OF ZERO FLUX DENSITY, WHEREBY THE SENSITIVITY OF SAID CIRCUIT TO SAID INPUT SIGNAL IS INCREASED, AND OUTPUT MEANS RESPONSIVE TO THE RESULTANT MAGNETIC FLUX CHANGE IN SAID CORE FOR PROVIDING OUTPUT PULSES EACH HAVING A WIDTH RELATED TO THE MAGNITUDE OF SAID INPUT SIGNAL.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |