Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1989-06-19
1990-04-17
Shoop, Jr., William M.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341158, 341160, 358 11, H03M 136
Patent
active
049184504
ABSTRACT:
An analog/digital converter circuit including a capacitor having a first end, to which an analog voltage is applied, and a second end, an input buffer circuit having an input terminal, connected to the second end of said capacitor, and an output terminal, a reference voltage generating circuit for generating a plurality of reference voltages having different voltage levels, a voltage comparator circuit having a plurality of voltage comparators for comparing the output voltage of the input buffer circuit with each of the reference voltages generated by the reference voltage generating circuit, and generating a digital signal corresponding to the comparison results, a decoder circuit for decoding the output of the voltage comparator circuit, and D.C. bias voltage selection/supply circuit for selecting one of the reference voltages of the reference voltage generating circuit and supplying the selected reference voltage as a D.C. bias voltage to the input terminal of the input buffer circuit.
REFERENCES:
patent: 3678413 (1972-07-01), Wakeling
patent: 4119960 (1978-10-01), Hill
patent: 4262282 (1981-04-01), Maida
patent: 4323885 (1982-04-01), Carriere et al.
patent: 4364028 (1982-12-01), Masuda et al.
patent: 4608555 (1986-08-01), Hoeft
patent: 4635036 (1987-01-01), Yoshizawa
patent: 4812817 (1989-03-01), Bernard
patent: 4837527 (1989-06-01), Sauer
Sugimoto Yasuhiro
Sugiyama Hisashi
Kabushiki Kaisha Toshiba
Romano G.
Shoop Jr. William M.
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