CMI Decoder

Details CMI Decoder CMI Decoder

1984-01-16

1985-12-31

Hix, L. T.

Communications: electrical

Audible indication

Percussion-type sound producer

360 44, H03M 512

Patent

active

045624224

ABSTRACT:
The invention involves a decoder for converting CMI-coded signals into binary signals. Existing decoders of this type have a comparatively elaborate design and high power consumption. The invention teaches an improved decoder which has an AND gate and a NOR gate with at least two inputs each, where one input of the two gates is connected directly to the signal input, and the other input is connected via a delay element with a delay corresponding to one half of a bit period of the CMI-coded signals. Each of the outputs of the two gates are connected separately to the inputs of an OR gate with the binary signals being available at its output further features of the present embodiment are a clock pulse generator and a CMI code protocol violation monitor. The present decoder can be used for transmission devices for of digital signals with bit rates of approximately 140 Mbit/sec.

REFERENCES:
patent: 3953673 (1976-04-01), Dorward
patent: 4185273 (1980-01-01), Gowan
patent: 4189621 (1980-02-01), Scott
patent: 4276649 (1981-06-01), Groenendaal et al.
patent: 4325053 (1982-04-01), Le Brozec et al.
IBM Technical Disclosure Bulletin (vol. 23, No. 7B, Dec. 1980).

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