Coded data generation or conversion – Digital code to digital code converters – To or from 'n' out of 'm' codes
Patent
1993-09-01
1997-05-13
Williams, Howard L.
Coded data generation or conversion
Digital code to digital code converters
To or from 'n' out of 'm' codes
341 50, 326105, H03M 720
Patent
active
056296975
ABSTRACT:
A code conversion circuit includes a first decoder having a number of output lines. The first decoder is responsive to an input binary signal representing a value i to develop a signal "1" on the (i+1)-th output line thereof. A second decoder is provided which includes gates connected to the respective ones of the first decoder output lines. The second decoder develops a signal "1" on all of the first to i-th output lines thereof, and a signal "0" on all of the remaining output lines. The gates of the second decoder are divided into a plurality of blocks in which gates are connected in series. Block control signals are prepared from most significant bits of the binary input signal and applied to the respective blocks. The block to which the signal "1" is applied from the first decoder so that the signals "1" and "0" are developed on appropriate ones of the output lines. The lower order blocks are conditioned to develop a signal "1" on all of the output lines thereof, and the higher order blocks are conditioned to develop a signal "0" on all of the output lines thereof.
REFERENCES:
patent: 3599182 (1971-08-01), Henle
patent: 3653034 (1972-03-01), ReGitz
patent: 4177455 (1979-12-01), Armstrong et al.
patent: 4887084 (1989-12-01), Yamaguchi
patent: 5243348 (1993-09-01), Jackson
Jean-Pierre Peguy
Mitsubishi Denki & Kabushiki Kaisha
Morrison Thomas R.
Pastel Christopher R.
Williams Howard L.
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