Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1986-12-18
1988-08-16
Shoop, Jr., William M.
Communications: electrical
Audible indication
Percussion-type sound producer
H03M 700
Patent
active
047647493
ABSTRACT:
An encoder circuit comprising a plurality of input lines on each of which is to appear a logic "1" or "0" signal bit, a plurality of output lines, a first set of transistors of a first conductivity type, each of the first set transistors having a control terminal connected to each of the input lines and input and output terminals connected between each of the output lines and a supply voltage source, a second set of transistors of a second conductivity type opposite to the first conductivity type, each of the second set transistors having a control terminal connected to each of the input lines and input and output terminals between each of the output lines and ground, and a plurality of logic inverter devices each connected between each of the input lines and each of the transistors of one of the first and second conductivity types.
REFERENCES:
patent: 3945000 (1976-03-01), Suzuki et al.
Blum Richard K.
NEC Corporation
Shoop Jr. William M.
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