Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1991-05-10
1992-04-21
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341162, 341172, H03M 140
Patent
active
051072661
ABSTRACT:
An algorithmic analog/digital converting circuit in accordance with the present invention comprising a control signal generator for inputting a least significant bit signal from a shift register, a start signal and a clock signal to output a first to a tenth switching signals for controlling ON/OFFs of a first to tenth switches and a latch signal for controlling latch of said shift register, in order to perform an operation of steps of sampling an input signal and a reference voltage signal, comparing the sampled input signal with the sampled reference voltage signal, subtracting or holding in accordance with an output signal from a comparator reproducing the subtracted or held signal and amplifying the reproduced signal. Therefore, in accordance with the present invention, there can be provided the algorithmic analog/digital converting circuit which is capable of reducing the layout area on chip by reducing the number of its condensers and operational amplifiers, and requiring no further techniques for the offset voltage by ofsetting the offset voltage from the operational amplifier by the switching control without use of condenser.
REFERENCES:
patent: 3585634 (1971-06-01), Sharples
patent: 4119960 (1978-10-01), Hill
patent: 4143362 (1979-03-01), Ulmer
patent: 4325055 (1982-04-01), Colardelle et al.
patent: 4529965 (1985-07-01), Lee
patent: 4691190 (1987-09-01), Robinson
patent: 4760376 (1988-07-01), Kobayashi et al.
Goldstar Electron Co. Ltd.
Williams Howard L.
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