Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1983-07-29
1985-09-03
Miska, Vit W.
Communications: electrical
Audible indication
Percussion-type sound producer
330 9, 307362, H03K 1302, H03K 3023
Patent
active
045395519
ABSTRACT:
A differential voltage amplifier comprises a first and second capacitive coupling type amplifiers in each of which an autozeroed mode period for setting an operating point and a signal amplifying mode period for amplifying an input voltage are alternately set up, and the autozeroed mode periods in said first and second amplifier are shifted from each other, first and second mode selector for alternately setting up the autozeroed mode and the signal amplifying mode in the first and second capacitive coupling type amplifiers, first and second signal selectors provided corresponding to the first and second capacitive coupling type amplifiers, the first and second signal selectors alternately selecting a reference voltage and an input signal voltage to apply the selected signal to the first and second capacitive coupling type amplifiers, the first and second signal selectors further selecting the reference voltage corresponding to the autozeroed mode periods of the first and second capacitive coupling type amplifiers and the input signal voltage corresponding to the signal amplifying mode periods, and a selector for selecting the amplified signal output from the first and second capacitive coupling type amplifiers when the first and second capacitive coupling type amplifiers are in the signal amplifying mode.
REFERENCES:
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Electronics, May 5, 1982, p. 138, FIG. 1.
Allstot, "A Precision Variable-Supply CMOS Comparator," IEEE Journal of Solid-State Circuits, vol. SC-17, No. 6, Dec. 1982.
Dingwall, "Monolithic Expandable 6 Bit 20 MHz CMOS/SOS A/D Converter," IEEE J. Solid-State Circuits, vol. SC-14, No. 6, pp. 926-932, Dec. 1979.
Fujita Yasuhiko
Masuda Eiji
Miska Vit W.
Tokyo Shibaura Denki Kabushiki Kaisha
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