UHF crystal oscillator

Details UHF crystal oscillator UHF crystal oscillator

1988-04-27

1989-06-27

Laroche, Eugene R.

Oscillators

Solid state active element oscillator

Transistors

331158, H03B 530

Patent

active

048433497

ABSTRACT:
A crystal-controlled oscillator operable at a direct UHF frequency includes an amplifier having a feedback circuit formed from an SC-cut crystal and an impedance network. The impedance network provides an impedance load for the cyrstal, and the values of the individual components forming the impedance network are selected to provide an overall inductive load for the SC-cut crystal. Inductively loading the cyrstal permits the crystal to oscillate at the C mode or UHF frequency mode, and prevents unwanted crystal oscillation at the B mode or VHF mode.

REFERENCES:
patent: 3875533 (1975-04-01), Irwin et al.
patent: 4001724 (1977-01-01), Keller
patent: 4570132 (1986-02-01), Driscoll
patent: 4646034 (1987-02-01), Chauvin et al.
Direct Frequency Crystal Oscillators, Lewis B. Dart and Jacques Chauvin, Proc. 35th Annual Frequency Control Symposium, USAERADCOM, Fort Monmouth, N.J. (May, 1981).

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