05095288 is referenced by 42 patents and cites 3 patents.

The invention relates to a phase-locked loop having a variable bandwidth and comprising a controlled oscillator, a phase comparison device, two current generating devices (21-22, 25-26) and a loop filter (23-24). Each of the current generating devices is intended to produce a positive or a negative pulsed current in response to signals from the phase comparison device. The outputs of the current generating devices are each connected to a respective point in the loop filter. The loop bandwidth can be varied continuously while maintaining a desired damping factor, by increasing the amplitude of the currents from each of the current generating devices (21-22, 25-26) when the bandwidth is to be increased, and vice versa.

Title
Phase-locked loop having a variable bandwidth
Application Number
7/611523
Publication Number
5095288
Application Date
November 13, 1990
Publication Date
March 10, 1992
Inventor
Paul W Dent
Stehag
SE
Agent
Burns Doane Swecker & Mathis
Assignee
Telefonaktiebolaget L M Ericsson
SE
IPC
H03L 7/00
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