Arbitrary frequency signal generator

Details Arbitrary frequency signal generator Arbitrary frequency signal generator

2007-08-21

2007-08-21

Lee, Benny (Department: 2817)

Oscillators

Ring oscillators

C331S00100A, C327S160000

Reexamination Certificate

active

11104555

ABSTRACT:
The present invention is based on the objective of constructing a PLL as arbitrary frequency generator for frequency multiplication purposes without utilizing a VCO. The invention shows a solution which can be realized with a pure digital circuit which can be easily integrated on a chip. In digital oscillators, the frequency can be changed, by changing over the number of time-delay elements. It is also possible to realize very slight frequency changes per switching stage by changing over between different elements with very similar delay times. In addition, a pulse-width modulator is utilized that periodically changes over between two or more of these stages and consequently different frequencies. Furthermore a PLL is introduced using such a frequency generator.

REFERENCES:
patent: 6404247 (2002-06-01), Wang
patent: 6507247 (2003-01-01), Langston

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