Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-10-03
1978-12-12
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
H03K 1302
Patent
active
041298632
ABSTRACT:
An array of binary weighed capacitors, an additional capacitor having a capacitance value equivalent to that of the least of the binary weighted capacitors, a voltage comparator, switches for interconnecting the capacitors with certain predetermined voltage levels and the comparator, and a sequencing circuit are included. One side of all of the capacitors is connected to one input terminal on the comparator and the other side has applied thereto the signal to be quantized. Switch sequencing combines divided portions of a reference voltage with the signal to be quantized for presentation to the input of the comparator which thereby provides a serial digit output connected to the sequencing circuit. In this fashion, a linear conversion between an analog and a digital signal is made by the sequencing circuit. A nonlinear converter between digital and analog signal presentation is also disclosed.
REFERENCES:
patent: 3056085 (1962-09-01), James
patent: 3251052 (1966-05-01), Hoffman
patent: 3653030 (1972-03-01), Carbrey
patent: 3906488 (1975-09-01), Suarez
Gray Paul R.
Hodges David A.
McCreary James L.
Miller Charles D.
Regents of the University of California
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