Shared pin resonator oscillators

Details Shared pin resonator oscillators Shared pin resonator oscillators

2008-05-09

2009-12-29

Chang, Joseph (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S162000, C331S1160FE

Reexamination Certificate

active

07639094

ABSTRACT:
An oscillator circuit for a plurality of resonator-based oscillators is provided. In a dual oscillator circuit, a first oscillator circuit operating at a first frequency is coupled to a second oscillator circuit operating at a lower frequency. The two circuits are separated by a low-pass filter that isolates the input stage of the first oscillator circuit from the input stage of the second oscillator circuit. A circuit leg shared between the first oscillator circuit and the second oscillator circuit is configured to couple the first input stage of the first oscillator circuit to a first external resonator resonate at the first frequency and couple the second input stage of the second oscillator circuit to a second external resonator resonate at the second frequency.

REFERENCES:
patent: 4107625 (1978-08-01), Courier de Mere
patent: 4575690 (1986-03-01), Walls et al.
patent: 5481227 (1996-01-01), Komori et al.
patent: 5748049 (1998-05-01), Bayruns et al.
patent: 2002/0171511 (2002-11-01), Oita

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