Oscillator and driving circuit and oscillation method thereof

Details Oscillator and driving circuit and oscillation method thereof Oscillator and driving circuit and oscillation method thereof

2008-11-13

2010-12-28

Pascal, Robert (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S1160FE, C331S158000, C331S183000

Reexamination Certificate

active

07859353

ABSTRACT:
An oscillator, a driving circuit and an oscillation method are provided. The driving circuit and a crystal are coupled in parallel to generate a clock signal. The driving circuit includes a buffer unit and a control unit. The buffer unit is coupled in parallel to the crystal, and used to amplify an oscillation signal outputted from the crystal to generate the clock signal. The control unit is coupled to the buffer unit, and used to generate a control signal to the buffer unit. The control unit determines a voltage level of the control signal by detecting whether the clock signal or the oscillation signal satisfies an oscillation condition of the crystal, so as to control a gain value of the buffer unit. Therefore, noise of different frequency bands loaded into the clock signal can be avoided.

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patent: 2007/0024385 (2007-02-01), Greenberg

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