Temperature compensated crystal oscillator

Oscillators – Automatic frequency stabilization using a phase or frequency... – Plural oscillators controlled

Reexamination Certificate

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Details

C331S158000, C331S1160FE, C331S1160FE, C331S018000, C331S020000

Reexamination Certificate

active

07541878

ABSTRACT:
An apparatus, comprising: a first oscillator made from piezoelectric material to oscillate at a first frequency; a second oscillator to oscillate at a second frequency; a comparator to compare the first frequency to the second frequency; and a controller to change the first frequency in response to the comparing of the first frequency to the second frequency.

REFERENCES:
patent: 6545550 (2003-04-01), Frerking
patent: 7098748 (2006-08-01), Schmidt

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