Crystal-based oscillator for use in synchronized system

Details Crystal-based oscillator for use in synchronized system Crystal-based oscillator for use in synchronized system

2009-03-05

2010-10-12

Pascal, Robert (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S055000, C331S158000

Reexamination Certificate

active

07812682

ABSTRACT:
A crystal oscillator-based module, which includes a crystal resonator receiving a conditioned signal from a first bus and passing a resonator signal to a sustaining stage amplifier. A synchronization range expansion circuit is connected between a gain control network and the resonator. A tri-state buffer has a main input connected to receive the resonator signal through a buffer. The output of the tri-state buffer is connected to a second bus, through a matching network if necessary. A synchronous clock system can be formed by connecting these modules alternately to the two busses. The tri-state buffer also has a control input, which may be connected to a delay circuit between Vcc and ground, so as to allow hot swapping and for other benefits.

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International Search Report for application No. PCT/US2010/025554; mailed May 3, 2010.

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