Multiple frequency clock generation and synchronization

Details Multiple frequency clock generation and synchronization Multiple frequency clock generation and synchronization

1998-05-04

2000-05-16

Wambach, Margaret R.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

327115, 327145, 327151, 327175, 377 47, G06F 104

Patent

active

060642475

ABSTRACT:
A method and apparatus for generating multiple frequency clock signals using a single input clock signal are provided. Each clock signal generated has a cycle time that is an integer multiple of the input clock cycle time. The fastest clock signal, i.e., the clock signal with the highest frequency generated has the same cycle time as the input clock. The rising edges of all the clock signals generated are synchronized and each clock signal generated has an approximate duty cycle of 50%. This is achieved by first applying the input clock signal to an input terminal of a plurality of registers and of a frequency control module of the signal generator, presenting control signals to input terminals of the registers and of the frequency control module, and generating a plurality of output clock signals in the frequency control module, dependent on the input clock signal and on the control signals.

REFERENCES:
patent: 5365119 (1994-11-01), Kivari

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