Servo data demodulator

Details Servo data demodulator Servo data demodulator

1985-11-01

1987-10-06

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307353, 328151, H03K 515, H03K 5153, G11C 2702

Patent

active

046985239

ABSTRACT:
There is disclosed herein a servo data demodulator for use in magnetic head positioning servo system for disk drives. The demodulator is comprised of a single peak detector which detects the maximum amplitude of the peaks in an input signal during specific times. A storage capacitor is used in the peak detector to store the peak level. This peak level is sampled a predetermined number of times during each data frame. Each sample is taken by a different sample and hold circuit, and the sequence of the samples is controlled by a timing generator. The capacitor of the peak detector is discharged by a switch controlled by the timing generator after each sample and before the next sample. The time delay before the first sample from the start of the frame and the sample time in the sequence is programmable by the user by setting certain inputs into the timing generator.

REFERENCES:
patent: 3602826 (1971-08-01), List et al.
patent: 4069452 (1978-01-01), Conway et al.
patent: 4373141 (1983-02-01), Sanders

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