Multiple bandwidth crystal controlled oscillator

Details Multiple bandwidth crystal controlled oscillator Multiple bandwidth crystal controlled oscillator

H - Electricity

03

B

H03B 5/32 (2006.01)

Patent

CA 2053907

A dual bandwidth crystal controlled oscillator (200) is described having a first transconductance amplifier (202) providing sufficient gain to maintain oscillation with an oscillator crystal (210) at a minimum current drain. A second transconductance am- plifier (218) is provided which can be selectively coupled to the first transconductance amplifier (202), thereby augmenting the gain of the first transconductance amplifier (202) to provide the capability for rapid oscillator start-up following battery saver op- eration. The dual bandwidth crystal controlled oscillator (200) can be utilized in conventional oscillator and frequency synthesiz- er applications.

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