Current source loop filter with automatic gain control

Details Current source loop filter with automatic gain control Current source loop filter with automatic gain control

1994-10-21

1995-12-19

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Transistorized controls

331 10, 331 17, 331 25, 327157, H03L 7089, H03L 7093

Patent

active

054771935

ABSTRACT:
A current source suitable for use as a loop filter in a phase-locked loop having two aspects of automatic gain control one for prohibiting the voltage controlled oscillator from stopping as the input voltage approaches the limits of the oscillator and another to compensate for current limiting drain to source voltage drops.

REFERENCES:
patent: 3594649 (1971-07-01), Rauch
patent: 4498020 (1985-02-01), Giolma et al.
patent: 4692717 (1987-09-01), Ouyang et al.
patent: 4812784 (1989-03-01), Chung et al.
patent: 4922139 (1990-05-01), Giebel
patent: 4959618 (1990-09-01), Shier
patent: 4987387 (1991-01-01), Kennedy et al.
patent: 5300898 (1994-04-01), Chen et al.
patent: 5341113 (1994-08-01), Baron et al.
patent: 5384502 (1995-01-01), Volk
patent: 5422603 (1995-06-01), Soyuer

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