Phase frequency detector capable of improving noise...

Details Phase frequency detector capable of improving noise... Phase frequency detector capable of improving noise...

2006-10-12

2008-12-09

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

C331S011000, C327S003000

Reexamination Certificate

active

07463100

ABSTRACT:
A phase frequency detector for improving in-band phase noise characteristics of a PLL is disclosed. The phase frequency detector compares a reference frequency with a division frequency created by dividing an output frequency of a voltage controlled oscillator (VCO) by a predetermined division ratio, creates a phase-difference signal corresponding to a phase difference between the reference frequency and the division frequency, and improves noise characteristics.

REFERENCES:
patent: 6075416 (2000-06-01), Dalmia
patent: 6566967 (2003-05-01), Anumula et al.
patent: 6987406 (2006-01-01), Chiu
patent: 7009456 (2006-03-01), Jasa et al.
patent: 2001-144607 (2001-05-01), None
Korean Intellectual Property Office, Office Action mailed Oct. 30, 2006.

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