US3142806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonreference pulse position demodulator
Assignee: Lockheed Martin Corp
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Filing: 1961-06-29
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Granted: 1964-07-28
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Expires: 1981-06-29
Abstract
No abstract record available.
Inventors
- 👤 Humbert M Fernandez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:14
CPC Classifications
H; H03; H03K; H03K9/00; H03K9/04; H04; H04B; H04B14/00; H04B14/02; H04B14/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A NONREFERENCE DEMODULATOR COMPRISING ELECTRONIC MEANS TO GENERATE A SAWTOOTH WAVEFORM, SAMPLING MEANS FOR SAMPLING SAID SAWTOOTH WAVEFORM, SAID SAMPLING MEANS HAVING AN INPUT TERMINAL, SAID SAMPLING MEANS SAMPLING SAID SAWTOOTH WAVEFORM AT TIMES DETERMINED BY SAMPLE SIGNAL INPUTS IN THE FORM OF PULSE POSITION MODULATION PULSES RECEIVED AT SAID INPUT TERMINAL FROM AN EXTERNAL SOURCE, SAID SAMPLING MEANS HAVING A PULSE AMPLITUDE MODULATED OUTPUT PROPORTIONAL TO THE AMPLITUDE OF THE SAWTOOTH WAVEFORM AT THE TIME THE SAID SAMPLE SIGNAL INPUT PULSES OCCUR, MEMORY MEANS FOR RETAINING THIS VOLTAGE AFTER EACH SAMPLE, THUS CREATING A STEPPED WAVEFORM, BANDPASS FILTER MEANS FOR SEPARATING OUT THE DESIRED SIGNAL OUTPUT FROM SAID STEPPED WAVEFORM, LOW PASS FILTER MEANS TO EXTRACT A DIRECT CURRENT OUTPUT FROM
Claim 2
Dependent Claim
122 words
A NONREFERENCE DEMODULATOR COMPRISING ELECTRONIC MEANS TO GENERATE A SAWTOOTH WAVEFORM, SAMPLING MEANS FOR SAMPLING SAID SAWTOOTH WAVEFORM, SAID SAMPLING MEANS HAVING AN INPUT TERMINAL, SAID SAMPLING MEANS SAMPLING SAID SAWTOOTH WAVEFORM AT TIMES DETERMINED BY SAMPLE SIGNAL INPUTS IN THE FORM OF PULSE POSITION MODULATION PULSES RECEIVED AT SAID INPUT TERMINAL FROM AN EXTERNAL SOURCE, SAID SAMPLING MEANS HAVING A PULSE AMPLITUDE MODULATED OUTPUT PROPORTIONAL TO THE AMPLITUDE OF THE SAWTOOTH WAVEFORM AT THE TIME THE SAID SAMPLE SIGNAL INPUT PULSES OCCUR, MEMORY MEANS FOR RETAINING THIS VOLTAGE AFTER EACH SAMPLE, THUS CREATING A STEPPED WAVEFORM, BANDPASS FILTER MEANS FOR SEPARATING OUT THE DESIRED SIGNAL OUTPUT FROM SAID STEPPED WAVEFORM, LOW PASS FILTER MEANS TO EXTRACT A DIRECT CURRENT OUTPUT FROM
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |