Phase locked loop with loop gain stabilization circuit

Details Phase locked loop with loop gain stabilization circuit Phase locked loop with loop gain stabilization circuit

1993-07-28

1994-09-06

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

331 17, 331 18, 331 25, H03L 708, H03L 7093

Patent

active

053451937

ABSTRACT:
A phase locked loop includes a linear phase detector responsive to a first signal having a predetermined range of frequencies and a second signal for comparing the relative phase of the first signal and the second signal, and a loop gain stabilization circuit coupled between the source of the first signal and the linear phase detector for reducing the magnitude of variations in the loop gain of the phase locked loop over the predetermined range of frequencies of the first signal source. An embodiment of the linear phase detector comprises a harmonic sampler/presteer circuit. The construction and operation of the loop gain stabilization circuit depends on whether the phase locked loop is being used in a frequency multiplying or dividing circuit.

REFERENCES:
patent: 4864257 (1989-09-01), Vandegraaf
patent: 4965533 (1990-10-01), Gilmore

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