CMI encoder circuit

Details CMI encoder circuit CMI encoder circuit

1994-04-25

1996-04-23

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

To or from nrz codes

H03M 512

Patent

active

055107869

ABSTRACT:
A Coded Marked Inversion (CMI) encoding circuit having a completely synchronous and digital implementation for encoding a stream of digital data in non-return-to-zero (NRZ) format into the CMI format. The encoding circuit includes a clock for providing a clock signal having a certain period, an input circuit for obtaining two samples of the NRZ data during each clock period, and a state machine which, in response to the two samples of the NRZ data, produces CMI encoded data. In a more advanced implementation, the encoding circuit includes error encoding circuitry for detecting errors in the incoming samples of NRZ data. The encoding circuit then outputs data indicative of the rate at which errors are received.

REFERENCES:
patent: 4189621 (1980-02-01), Scott
patent: 5107263 (1992-04-01), Kim et al.
patent: 5113187 (1992-05-01), Gorshe

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