NCO with rational frequency and normalized phase

Details NCO with rational frequency and normalized phase NCO with rational frequency and normalized phase

2005-10-11

2005-10-11

Choe, Henry (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S179000

Reexamination Certificate

active

06954114

ABSTRACT:
A numerically controlled oscillator (NCO) system for generating rational frequencies with normalized phase is disclosed. In one embodiment, the system comprises a rational NCO and a simple NCO. The rational NCO generates an overflow or correction value, based on a desired rational frequency of the system, and the simple NCO uses the overflow or correction value to generate the desired rational frequency.

REFERENCES:
patent: 5425055 (1995-06-01), Blaker
patent: 5521534 (1996-05-01), Elliott
patent: 5612975 (1997-03-01), Becker et al.
patent: 5748677 (1998-05-01), Kumar
patent: 5808493 (1998-09-01), Akiyama et al.
P.V. Brennan, “Phase-Locked Loops”>>, 1996, pp. 1-204; Published by McCraw-Hill.

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