Clock generator using a state machine to switch between two offs

Details Clock generator using a state machine to switch between two offs Clock generator using a state machine to switch between two offs

1995-04-03

1997-02-18

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

Having selection between plural continuous waveforms

327407, 326 46, 326 93, H03K 1700

Patent

active

056044526

ABSTRACT:
A simple structure for switching between two clock signals to produce an output without a glitch or short pulse. The invention is basically a three-input multiplexer controlled by a modified two-bit state machine. The state machine includes flip-flop memories which are driven by the two different clocks, as opposed to using a single clock as in a traditional state machine. The state machine output is used to control the three-input multiplexer, selecting between the first clock, the second clock and an intermediate high level signal during transition. The intermediate high level signal bridges the gap between pulses, eliminating any short glitches.

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