High speed phase/frequency detector

Details High speed phase/frequency detector High speed phase/frequency detector

1998-03-27

2000-03-14

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By frequency

327156, G01R 2302, H03K 906

Patent

active

060378069

ABSTRACT:
A phase/frequency detector (18) includes a first memory circuit (50), a second memory circuit (52), a first set circuit (54), a second set circuit (58) and a reset circuit (56). The first memory circuit (50) provides a first output signal (20) in response to the first input signal (12). The second memory circuit (52) provides a second output signal (22) in response to the second input signal (14). The first set circuit (54) initiates the transition of the first memory circuit (50) to the active state, and the second set circuit (58) initiates the transition of the second memory circuit (52) to the active state. The reset circuit (56) initiates the transition of the memory circuits (50, 52) to the inactive state.

REFERENCES:
patent: 4804928 (1989-02-01), Chloupek et al.
patent: 5142555 (1992-08-01), Whiteside
patent: 5483558 (1996-01-01), Leon et al.
patent: 5592110 (1997-01-01), Noguchi
patent: 5619148 (1997-04-01), Guo
patent: 5629651 (1997-05-01), Mizuno
patent: 5903195 (1999-05-01), Lukes et al.

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