Multiclock controller

Details Multiclock controller Multiclock controller

1993-08-12

1996-12-24

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

Having selection between plural continuous waveforms

327298, H03K 1700

Patent

active

055876757

ABSTRACT:
A multi-clock controller circuit includes first and second inputs to which two different types of clocks, such as a crystal oscillator clock and a TTL clock, can be applied. The circuit automatically senses which of the two input clock signals is active and provides that clock signal to an output of the circuit. Power up and power down conditions are achieved without generating non-standard clock pulses on the output through use of a synchronizer stage comprising a plurality of flip flops which determines the number of input clock cycles which are received by the circuit before output clock signals for power up or power down conditions commence.

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