US3243707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformerless demodulator
Assignee: North American Aviation Corp
•
Filing: 1962-07-02
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Granted: 1966-03-29
•
Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 George B Cottrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/542; H03C1/545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A TRANSFORMERLESS DEMODULATOR CIRCUIT FOR ACHIEVING PHASE SENSITIVE DEMODULTION OF A MODULATED INPUT SIGNAL, AN OUTPUT LOAD, AN ALTERNATING REFERENCE SIGNAL SOURCE, A BIPOLAR SWITCH CONNECTED BETWEEN SAID SIGNAL INPUT AND SAID LOAD; GATING MEANS CONNECTED BETWEEN SAID SWITCH AND SAID REFERENCE SIGNAL SOURCE FOR ALTERNATELY CAUSING SAID SWITCH TO CONNECT AND DISCONNECT SAID MODULATED SIGNAL TO SAID LOAD, SAID GATING MEANS INCLUDING MEANS FOR STORING ENERGY FROM SAID REFERENCE SIGNAL IN RESPONSE TO ONE HALF CYCLE OF THE OUTPUT THEREOF AND MEANS FOR CAUSING AN ENERGY OUTPUT IN RESPONSE TO THE OTHER HALF CYCLE OF THE OUTPUT OF SAID REFERENCE SIGNAL SOURCE, SAID SWITCH BEING TURNED ON IN RESPONSE TO THE ENERGY, OUTPUT OF SAID GATING MEANS.
Claim 2
Dependent Claim
119 words
IN A TRANSFORMERLESS DEMODULATOR CIRCUIT FOR ACHIEVING PHASE SENSITIVE DEMODULTION OF A MODULATED INPUT SIGNAL, AN OUTPUT LOAD, AN ALTERNATING REFERENCE SIGNAL SOURCE, A BIPOLAR SWITCH CONNECTED BETWEEN SAID SIGNAL INPUT AND SAID LOAD; GATING MEANS CONNECTED BETWEEN SAID SWITCH AND SAID REFERENCE SIGNAL SOURCE FOR ALTERNATELY CAUSING SAID SWITCH TO CONNECT AND DISCONNECT SAID MODULATED SIGNAL TO SAID LOAD, SAID GATING MEANS INCLUDING MEANS FOR STORING ENERGY FROM SAID REFERENCE SIGNAL IN RESPONSE TO ONE HALF CYCLE OF THE OUTPUT THEREOF AND MEANS FOR CAUSING AN ENERGY OUTPUT IN RESPONSE TO THE OTHER HALF CYCLE OF THE OUTPUT OF SAID REFERENCE SIGNAL SOURCE, SAID SWITCH BEING TURNED ON IN RESPONSE TO THE ENERGY, OUTPUT OF SAID GATING MEANS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |