Zero phase shift active microwave oscillators with resistive fee

Details Zero phase shift active microwave oscillators with resistive fee Zero phase shift active microwave oscillators with resistive fee

1986-07-02

1989-01-17

LaRoche, Eugene R.

Oscillators

Ring oscillators

331108B, 331135, H03B 520

Patent

active

047990287

ABSTRACT:
A microwave oscillator in a loop configuration comprises three substantially identical amplifier stages each having its own phase shift at a selected oscillating frequency. A transmission delay element having a phase shift at the selected oscillating frequency, is also in the loop configuration, so that the oscillator has zero phase shift around the loop at the oscillating frequency. Each amplifier stage has at least one active component with resistive feedback, which is connected to DC blocking and filtering capacitors. Capacitor values between 2.2 and 5.1 pf are used making the oscillator design amenable to cost effective conventional hybrid and semiconductor processes.

REFERENCES:
patent: 3737806 (1973-06-01), Darrow
patent: 3764745 (1973-10-01), Bottcher et al.
Micro-Electronics, by Jacob Millman Phd., Columbia University, McGraw Hill Book Company, copyright 1979, chapter 17, Waveshaping and Waveform Generators, pp. 649-657.
Microwaves & RF, Aug. 1984, published by Hayden Publishing Co., Hasbrouck Heights, N.J., title: Choosing Devices for Quiet Oscillators, pp. 166-170.
Avantek Inc., Santa Clara, Calif., Semiconductor Device Catalog, 1985, copyright 1984, pp. 92-95.
Wireless World, Mar. 1968, p. 25.

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