Servo control mechanism with wide input dynamic range and fast r

Details Servo control mechanism with wide input dynamic range and fast r Servo control mechanism with wide input dynamic range and fast r

1994-09-13

1996-08-06

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359194, H04B 1006

Patent

active

055439535

ABSTRACT:
A servo control loop for tuning a center frequency of a tuning device to a desired frequency. More specifically, the dynamic range and response time of the servo loop are improved by closing the loop when the sign of the dither signal is such that the center frequency of filter would move towards the desired frequency when the loop is closed and by shifting the phase of the residual dither so that it adds at least partially in phase with the dither signal. The two components thus added are used to supply the control signal for the tuning device.

REFERENCES:
patent: 4215936 (1980-08-01), Wincour
patent: 4841519 (1989-06-01), Nishio
patent: 5204640 (1993-04-01), Logan, Jr.
patent: 5287073 (1994-02-01), Den Braber

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