Patent US3139538A successfully refreshed from Google Patents.
US3139538A
Expired / Lapsed
US
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Sawtooth current generator employing r. c. network and diode effecting low power loss in circuit
Assignee: GTE Sylvania Inc
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Filing: 1962-01-11
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Granted: 1964-06-30
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Expires: 1982-01-11
Abstract
No abstract record available.
Inventors
- 👤 Geller William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:03
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62; H03K4/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A GENERATOR FOR PRODUCING A SAWTOOTH CURRENT WAVEFORM HAVING TRACE AND RETRACE PORTIONS COMPRISING (A) A TRANSISTOR HAVING FIRST, SECOND, AND THIRD ELECTRODES, (B) A RESISTANCE-CAPACITANCE NETWORK COUPLED BETWEEN THE FIRST AND SECOND ELECTRODES OF SAID TRANSISTOR, THE TIME CONSTANT OF SAID RESISTANCE-CAPACITANCE NETWORK HAVING A VALUE WHEREBY SAID CAPACITOR SUBSTANTIALLY DISCHARGES DURING THE RETRACE PORTION OF SAID SAWTOOTH CURRENT WAVEFORM, (C) RECTIFYING MEANS COUPLED BETWEEN THE FIRST AND THIRD ELECTRODES OF SAID TRANSISTOR, AND (D) AN INDUCTANCE COUPLED BETWEEN THE FIRST AND THIRD ELECTRODES OF SAID TRANSISTOR.
Claim 2
Dependent Claim
88 words
A GENERATOR FOR PRODUCING A SAWTOOTH CURRENT WAVEFORM HAVING TRACE AND RETRACE PORTIONS COMPRISING (A) A TRANSISTOR HAVING FIRST, SECOND, AND THIRD ELECTRODES, (B) A RESISTANCE-CAPACITANCE NETWORK COUPLED BETWEEN THE FIRST AND SECOND ELECTRODES OF SAID TRANSISTOR, THE TIME CONSTANT OF SAID RESISTANCE-CAPACITANCE NETWORK HAVING A VALUE WHEREBY SAID CAPACITOR SUBSTANTIALLY DISCHARGES DURING THE RETRACE PORTION OF SAID SAWTOOTH CURRENT WAVEFORM, (C) RECTIFYING MEANS COUPLED BETWEEN THE FIRST AND THIRD ELECTRODES OF SAID TRANSISTOR, AND (D) AN INDUCTANCE COUPLED BETWEEN THE FIRST AND THIRD ELECTRODES OF SAID TRANSISTOR.
References Cited (Backward Citations)
US2747136A
Cited
US2921231A
Cited
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 |