| 摘要 |
PROBLEM TO BE SOLVED: To obtain a true circuit output value by eliminating the influence of an electric charge caused by charge injection from the output of a sample-and-hold circuit and eliminating the error of the circuit output even when voltages input in each switch are different and amounts of electric charge caused by the charge injection are different from one another. SOLUTION: This device for correcting output of a sample-and-hold circuit has the sample-and-hold circuit 1 having a first switch group comprised of a plurality of first switches SWnA(n=1-8) and a second switch group comprised of a plurality of second switches S"nB (N=1-8) and a correction circuit 5 of a charge injection effect, wherein the second switches are switched independently of the first switches, have gate area of real number multiple to the first switches, the sample-and-hold circuit performs sampling by any switching patterns in the first sampling operation, performs the sampling by a pattern different from that in the first operation in the second sampling operation and the correction circuit performs a correction operation using output results of the first and second sampling operations. COPYRIGHT: (C)2007,JPO&INPIT
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