US3713034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio signal controlled amplitude modulation circuit of square wave output
Assignee: United States Department of the Navy
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Filing: 1971-10-26
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Granted: 1973-01-23
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Expires: 1991-10-26
Abstract
Abstract AMPLITUDE MODULATION OF A RADIO FREQUENCY WITH MINIMUN DISTORTION AND GOOD LINEARITY IS ACCOMPLISHED BY DRIVING A SQUARING CIRCUIT OF THE ALTERNATELY CONDUCTING TWO TRANSISTOR TYPE AT THE RADIO FREQUENCY WHILE USING THE AUDIO SINAL TO CONTROL AMPLITUDE OF THE SQUARE WAVE OUTPUT. BRIDGE AND DIFFERENTIAL AMPLIFER FEEDBACK MEANS ARE USED TO ASSURE 50% DUTY CYCLES FOR THE SQUARING CIRCUIT TRANSISTORS.
Inventors
- 👤 A Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/02; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/542; H03C2200/00; H03C2200/0004; H03C2200/0012; H03C2200/0037; H03C2200/0045; H03C2200/0079
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |