Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1980-06-03
1982-07-27
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
235311, G06F 502
Patent
active
043420265
ABSTRACT:
An apparatus for converting an input BCD number into its equivalent output binary number in a first mode of operation or an input binary number into its equivalent output BCD number in a second mode of operation. Each input or output number comprises at least one two-digit character. An addressable storage circuit selectively stores the characters of the input number, as well as subsequent interim characters from a combining circuit, in predetermined storage locations. A developing circuit is selectively responsive to each character read out from a storage location and to an associated lower digit of each delayed odd character from a delay circuit for developing an odd addend and an odd multiplier, which are utilized by a first conversion circuit to develop an odd character. The odd character is delayed by the delay circuit to produce the delayed odd character. A second conversion circuit utilizes an even multiplier from an output circuit and the upper digit of the delayed odd character as an even addend to develop an even character. A combining circuit selectively combines consecutive pairs of the upper digits of the even characters into interim characters which are selectively stored in the predetermined storage locations of the addressable storage circuit. The output circuit is selectively responsive to associated lower digits of the even and delayed odd characters for developing even multipliers and the converted output number.
REFERENCES:
patent: 2814437 (1957-11-01), Woodbury
patent: 2860831 (1958-11-01), Hobbs
patent: 2894686 (1959-07-01), Holmes
patent: 2929556 (1960-03-01), Hawkins
patent: 3257547 (1966-07-01), Bernstein
patent: 3505675 (1970-04-01), Holtey
Burroughs Corporation
Cass Nathan
Miller Charles D.
Peterson Kevin R.
Rasmussen David G.
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