Semiconductor integrated circuit which performs phase synchroniz

Details Semiconductor integrated circuit which performs phase synchroniz Semiconductor integrated circuit which performs phase synchroniz

1991-04-19

1993-06-22

Mis, David

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 39, G11B 502

Patent

active

052220028

ABSTRACT:
Pulse detector and a data separator are integrated on a single chip semiconductor integrated circuit. In the pulse detector, an input stage of a gain variable amplifier, which amplifies an input signal applied thereto so as to have a constant peak, includes a bipolar transistor, and a pulse generator for generating a pulse shape signal according to a differential value of an output from the gain variable amplifier includes a Bi-CMOS gate or a CMOS gate. In the data separator, a voltage controlled oscillator for generating a clock signal includes a bipolar transistor. A frequency phase comparator for comparing the pulse shape signal in phases with the clock signal generated by the voltage controlled oscillator to obtain a phase difference, includes a Bi-CMOS gate and a CMOS gate.

REFERENCES:
patent: 5119244 (1992-06-01), Hardeng

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