Manchester decoder using gated delay line oscillator

Details Manchester decoder using gated delay line oscillator Manchester decoder using gated delay line oscillator

1988-08-31

1990-02-27

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

341 70, H04B 1402, H04L 2722

Patent

active

049052578

ABSTRACT:
Manchester level coded data is converted to NRZ by two gated delay line oscillators responsive to differential Manchester signals for providing a single gated pulse in response to consecutive data cells conveying the same data and for providing two pulses in response to a data change. A decoder circuit responds to the two pulse condition by toggling a data flip-flop that provides the NRZ data. The flip-flop also controls gates responsive to the two oscillators for selecting between the two oscillator signals to provide the NRZ clock. When the system bus ceases data transmission, three or more oscillator pulses are generated, the detection of which is utilized to preset the data flip-flop.

REFERENCES:
patent: 3491349 (1970-01-01), Sevilla et al.
patent: 4185273 (1980-01-01), Gowan
patent: 4344041 (1982-08-01), Maine
patent: 4542420 (1985-09-01), Kozlik et al.

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