Ad converter

Details Ad converter Ad converter

1988-10-18

1990-03-27

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341156, H03M 136

Patent

active

049124706

ABSTRACT:
A serial-parallel type AD converter comprises a first parallel type AD converting portion determining a higher order bit of a digital signal, a second parallel type AD converting portion determining a lower order bit of the digital signal and error correcting circuit. In the first parallel type Ad converting portion, a shifter is connected between a first determining circuit and a first encoder. In the second parallel type AD converting portion, a selector is connected between three second voltage comparator groups and a second determining circuit. The error correcting circuit applies control signals to the shifter and the selector for correcting errors derived from sampling skew of analog input voltages. The shifter determines the connection between the first determining circuit and first encoder in response to the control signal. The selector connects one of the three voltage comparator groups to the second determining circuit in response to the control signal.

REFERENCES:
patent: 4612531 (1986-09-01), Dingwall et al.
patent: 4635036 (1987-01-01), Yoshizawa
patent: 4719447 (1988-01-01), Garuts
Data Acquisition of Analog Devices Inc., the third edition published Jul., 1986, pp. 10-345.

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