PLL Circuit in which output oscillation signal frequency can be

Details PLL Circuit in which output oscillation signal frequency can be PLL Circuit in which output oscillation signal frequency can be

1997-09-08

2000-11-21

Kinkead, Arnold

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 2, 331 16, 331 17, 331177R, 327156, 375376, H03L 708, H03L 722, H03L 723

Patent

active

06150887&

ABSTRACT:
In a phase locked loop (PLL) circuit, a phase comparator compares an input signal and a feed back signal in phase to generate a phase difference voltage signal. A loop filter filters the phase difference voltage signal, and generates a filter output voltage signal. A bias signal generating section automatically generates a bias signal. A voltage controlled oscillating section generates an oscillation output signal based on the filter output voltage signal and the bias signal. The voltage controlled oscillating section generates the oscillation output signal having a same frequency as that of the input signal based on the bias signal. A counter generates the feed back signal based on the oscillation output signal.

REFERENCES:
patent: 5072195 (1991-12-01), Graham et al.
patent: 5334953 (1994-08-01), Mijuskovic
patent: 5629650 (1997-05-01), Gersbach et al.

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