Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1984-06-27
1986-11-18
Roskoski, Bernard
Communications: electrical
Audible indication
Percussion-type sound producer
H03M 500
Patent
active
046238727
ABSTRACT:
A circuit for coding a binary number represented in two's complement in a CSD-code wherein it is impossible for two immediately adjacent binary digits to respectively exhibit a "1". The circuit is simply constructed and has a high operating speed. This is achieved by means of a series of logic components which respectively evaluate according to an exclusive-OR function and which create an output bit -1 from two respectively adjacent binary digits of the number to be encoded upon appearance of the bit combination 1,0. A series of second logic components create a CSD-coded bit combination 0, 1 from two respectively adjacent first logic components having the output bits 1,-1, but which accept the output bits of the remaining first logic components into the CSD-coded bit combination in unaltered fashion. The circuit is used in signal processors.
REFERENCES:
patent: 4271523 (1981-06-01), Gable
IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-24, No. 1, Feb. 1976, pp. 76-86, by Abraham Peled, entitled "On the Hardware Implementation of Digital Signal Processors".
Roskoski Bernard
Siemens Aktiengesellschaft
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