Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1979-07-20
1981-08-04
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
328151, 307352, 340347M, 340347AD, 340347SH, H03K 1302
Patent
active
042825156
ABSTRACT:
A new encoder for an analog to digital converter of the successive approximation type incorporates instrumentation amplifier and signal sample and hold functions within the encoder proper, thereby substantially simplifying the converter circuitry. An input analog current signal is applied to a sample and hold capacitor within the encoder through the encoder comparator at a time when the weighted reference signal to the comparator is set to zero. The capacitor stored analog voltage is subsequently applied to the encoder summing node and the encoding sequence ensues. The encoder may be provided with offset and gain correction circuitry, conventionally found exterior to the encoder. In one embodiment of the invention, offset correction is effected using the signal sample and hold capacitor.
REFERENCES:
patent: 3027079 (1962-03-01), Fletcher et al.
patent: 3530458 (1970-09-01), Willard et al.
patent: 3943506 (1976-03-01), Peattie
patent: 3982241 (1976-09-01), Lipcon
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 387-389.
Harris Corporation
Sloyan Thomas J.
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