Oscillators – Electromechanical resonator – Crystal
Patent
1991-11-01
1993-07-06
Mis, David
Oscillators
Electromechanical resonator
Crystal
331179, 455310, H03B 536, H04B 110
Patent
active
052257924
ABSTRACT:
An oscillator circuit (200) is provided having a crystal oscillator (202) operating in a first oscillator mode to produce an oscillator output signal (201). The oscillator output signal (201) has a desired frequency of operation. The oscillator circuit (200) also includes switches (206A and 206B) for selectively forcing the crystal oscillator (202) to operate in a second oscillator mode in order to shift the frequency of the oscillator output signal (201).
REFERENCES:
patent: 4378532 (1983-03-01), Burgoon
patent: 4987388 (1991-01-01), Prakash et al.
Ghomeshi M. Mansour
Mis David
Motorola Inc.
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