Bit-serial decoder for a specially encoded bit stream

Details Bit-serial decoder for a specially encoded bit stream Bit-serial decoder for a specially encoded bit stream

1992-12-23

1994-12-20

Logan, Sharon D.

Coded data generation or conversion

Digital code to digital code converters

To or from particular bit symbol

H03M 508

Patent

active

053749278

ABSTRACT:
A method and apparatus for decoding a specially encoded bit stream without the use of an external clock. A bit stream is encoded so that the relative lengths of the pulse widths between the transitions in the bit stream are indicative of the type bit being transmitted. A decoder receives the bit stream, measures the lengths of the pulses between the transitions, determines the type of bit by comparing the lengths, and stores the bit in a shift register. The bits can then be output in parallel form.

REFERENCES:
patent: 3760412 (1973-09-01), Barnes
patent: 4032915 (1977-06-01), Shanks et al.
patent: 4312070 (1982-01-01), Coombes et al.
patent: 4425645 (1984-01-01), Weaver et al.
patent: 4501000 (1985-02-01), Immink et al.
patent: 4592072 (1986-05-01), Stewart
patent: 4951049 (1990-08-01), Whitfield
patent: 4954825 (1990-09-01), Chi
patent: 5042053 (1991-08-01), Hoppes
patent: 5073905 (1991-12-01), Dapper et al.
M. Banu and A. E. Dunlap, "Clock Recover Circuits With Instantaneous Locking", published Nov. 5, 1992 in the Electronic Letters.

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