FM canceler loop to reduce shock and vibration effects in crysta

Details FM canceler loop to reduce shock and vibration effects in crysta FM canceler loop to reduce shock and vibration effects in crysta

1997-08-22

1999-10-05

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 36C, 331 65, 331116R, 331158, 331175, 331177V, H03B 104, H03B 504, H03B 532

Patent

active

059630981

ABSTRACT:
A canceler loop is used to provide negative feedback to a crystal oscillator to reduce the effects of shock and vibration on the spectral purity of the crystal oscillator. The canceler loop demodulates the output of the crystal oscillator and supplied a stabilizing voltage representative of the demodulated output to cancel frequency modulation induced by shock and vibration. The stabilizing voltage is used to cancel the noise sidebands of the frequency spectrum of the crystal oscillator output without tuning the center frequency.

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