Bi-phase decoder apparatus and method

Details Bi-phase decoder apparatus and method Bi-phase decoder apparatus and method

1978-03-28

1979-09-11

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 43, G11B 509

Patent

active

041677609

ABSTRACT:
The apparatus and method of this invention provides an improved decoder capable of decoding data that has been encoded in accordance with the Bi-phase or Manchester encoding rules, which encoded data may be transmitted over a data channel at varying and various rates. A phase-locked loop circuit, including a phase locked oscillator, phase comparator and missing signal level transition detector, forms an integral part of the decoder apparatus that functions to sample the incoming data at the proper time regardless of the rate of data transmission, and decode the data from the encoded data. Also, a clock signal indicative of the data transmission rate is decoded from the encoded data.

REFERENCES:
patent: 3699554 (1972-10-01), Jones
patent: 3794987 (1974-02-01), Walentz
patent: 4012786 (1977-03-01), McKie et al.

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