Variable reactance circuit
Abstract
Abstract CIRCUIT IS APPLIED TO THE INPUT POINT, AND, BECAUSE OF THE CAPACITOR, THE CURRENT THUS APPLIED TO THE INPUT TRANSISTOR IS PHASE DISPLACED IN COMPARISON WITH THE CURRENT AT THE INPUT POINT. BY ADJUSTING THE CONTROL VOLTAGE ACROSS THE OUTPUT TRANSISTORS, THE EFFECTIVE CAPACITANCE IN PARALLEL WITH THE LC REACTANCE CIRCUIT IS VARIED. A VARIABLE CONTROL VOLTAGE UR IS APPLIED BETWEEN THE BASES OF TWO DIFFERENTIAL-AMPLIFIER OUTPUT TRANSISTORS, WHICH ARE CONNECTED IN CASCADE TO AN INPUT TRANSISTOR. ONE OF THE OUTPUT TRANSISTORS IS CONNECTED TO PROVIDE A CURRENT TO AN INPUT POINT BY FEEDBACK. THE INPUT POINT IS CONNECTED THROUGH A CAPACITOR OR A RESISTOR AND A CAPACITOR TO THE INPUT TRANSISTOR. AN LC PARALLEL CIRCUIT IS CONNECTED BETWEEN THE INPUT POINT AND GROUND. CURRENT FROM THE LC
Inventors
- 👤 E Legler
Bibliographic Details
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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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |