US3290518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for detecting amplitude modulated pulses appearing in frequency modulated waveforms
Assignee: Ampex Corp
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Filing: 1964-01-21
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Granted: 1966-12-06
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Barrett E Guisinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:14
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A PULSE DETECTOR FOR PRODUCING AN OUTPUT PULSE IN RESPONSE TO AN AM INPUT PULSE SUPERIMPOSED UPON AN INPUT WAVEFORM, COMPRISING: MEANS FOR SWITCHING ALTERNATELY BETWEEN A FIRST VOLTAGE LEVEL AND A SECOND VOLTAGE LEVEL WHENEVEN THE INPUT WAVEFORM CROSSES A SELECTED REFERENCE LEVEL, MEANS FOR CREATING A VOLTAGE RISE FROM AN INITIAL LEVEL IN RESPONSE TO EACH INTERVAL AT SAID FIRST VOLTAGE LEVEL BETWEEN ALTERNATE SWITCHES OF THE SWITCHING MEANS, SAID VOLTAGE RISE PROPORTIONAL TO THE LENGTH OF SAID INTERVAL, MEANS FOR RESETTING SAID VOLTAGE RISE TO SAID INITIAL LEVEL IN RESPONSE TO EACH INTERVAL AT SAID SECOND VOLTAGE LEVEL BETWEEN ALTERNATE SWITCHES OF THE SWITCHING MEANS, AND AN ACTIVE SWITCHING ELEMENT WITH CONTROL ELECTRODE COUPLED TO RECEIVE THE VOLTAGE RISE AND WITH BIAS CIRCUITRY INCLUDING A ZENER DIODE ARRANGED TO PREVENT SWITCHING OF THE ACTIVE SWITCHING ELEMENT UNTIL THE VOLTAGE RISE EXCEEDS A SELECTED VALUE.
Claim 2
Dependent Claim
147 words
A PULSE DETECTOR FOR PRODUCING AN OUTPUT PULSE IN RESPONSE TO AN AM INPUT PULSE SUPERIMPOSED UPON AN INPUT WAVEFORM, COMPRISING: MEANS FOR SWITCHING ALTERNATELY BETWEEN A FIRST VOLTAGE LEVEL AND A SECOND VOLTAGE LEVEL WHENEVEN THE INPUT WAVEFORM CROSSES A SELECTED REFERENCE LEVEL, MEANS FOR CREATING A VOLTAGE RISE FROM AN INITIAL LEVEL IN RESPONSE TO EACH INTERVAL AT SAID FIRST VOLTAGE LEVEL BETWEEN ALTERNATE SWITCHES OF THE SWITCHING MEANS, SAID VOLTAGE RISE PROPORTIONAL TO THE LENGTH OF SAID INTERVAL, MEANS FOR RESETTING SAID VOLTAGE RISE TO SAID INITIAL LEVEL IN RESPONSE TO EACH INTERVAL AT SAID SECOND VOLTAGE LEVEL BETWEEN ALTERNATE SWITCHES OF THE SWITCHING MEANS, AND AN ACTIVE SWITCHING ELEMENT WITH CONTROL ELECTRODE COUPLED TO RECEIVE THE VOLTAGE RISE AND WITH BIAS CIRCUITRY INCLUDING A ZENER DIODE ARRANGED TO PREVENT SWITCHING OF THE ACTIVE SWITCHING ELEMENT UNTIL THE VOLTAGE RISE EXCEEDS A SELECTED VALUE.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |