Servo data decoder for any amplitude dependent servo data encodi

Details Servo data decoder for any amplitude dependent servo data encodi Servo data decoder for any amplitude dependent servo data encodi

1986-07-10

1988-04-26

Dobeck, Benjamin

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318561, 318636, 360 77, G05B 101

Patent

active

047407360

ABSTRACT:
There is disclosed herein a servo data decoder which can decode both quadrature and non quadrature servo data. The decoder is comprised of a servo data amplitude demodulator to generate position error signals and a position error signal processor to generate a GPES signal to serve as a position error signal during the track following mode and a velocity signal and a track crossing signal for use in the seek mode. The user system may have either single or double pulse sync, and double pulse sync spacing, pulse window time and sync to first data pulse delay are user definable. The user may adjust the gain of the system in two manners and may program the frequency response characteristics of the phase locked loop. Many other user definable or user alterable features are provided.

REFERENCES:
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4379256 (1983-04-01), Maury
patent: 4412165 (1983-10-01), Case et al.

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