Symmetrical clock crystal oscillator circuit

Details Symmetrical clock crystal oscillator circuit Symmetrical clock crystal oscillator circuit

1993-11-22

1995-10-03

Pascal, Robert J.

Oscillators

Electromechanical resonator

Crystal

331116R, 331116FE, 331 74, 331 77, H03B 530

Patent

active

054555426

ABSTRACT:
An oscillator circuit provides a symmetrical signal without halving the frequency of a crystal oscillator 12. The input 14 of the crystal oscillator 12 is low pass filtered, and the output 18 of the filter 16 is differential voltage compared with the input 14 of the crystal oscillator 12. The output 22 of the differential voltage comparator 20 is symmetrical and of the same frequency as the crystal oscillator 12. The crystal oscillator 12 is preferably a Pierce oscillator.

REFERENCES:
patent: 5163263 (1992-08-01), Lane
patent: 5270670 (1993-12-01), Bladh

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