Miller-encoded message decoder

Details Miller-encoded message decoder Miller-encoded message decoder

1977-07-27

1978-09-05

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325321, 329106, 329107, 329122, 331 1A, 331 23, 331 25, H03K 910, H03K 1324

Patent

active

041123832

ABSTRACT:
A device for decoding a Miller-encoded message in the form of binary data at a clock frequency F. The decoder comprises: a transition detector which provides a very short pulse at each transition in the encoded message; first means controlled by a local clock at frequency F to pass only those short pulses which have the same phase; second means for stretching the short pulses passed by the first means to a duration of (1/2F); a local clock phase lock loop acting on a voltage-controlled oscillator of the local clock and responsive to the output signal of the second means; and a flip-flop to sample the output of the second means under the control of the local clock.

REFERENCES:
patent: 3537082 (1970-10-01), Vallee
patent: 3982195 (1976-09-01), Turner
Calfee et al., "Bandwidth Compression Method", IBM Technical Disclosure Bulletin, vol. 10, No. 7, Dec. 1967, pp. 909-910.

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