| 摘要 |
PROBLEM TO BE SOLVED: To provide a sample hold circuit having excellent noise characteristics, not influenced by a variation of input common voltage, and preventing a gain error.SOLUTION: Differential input signals VIP, VIN are connected to respective ends of sampling capacitors C1, C2 in a sample phase. Dummy capacitors CPP2, CPN2 are provided each of which has a capacity equal to corresponding capacities of the parasitic capacitance CPP1, CPN1 of an input terminal of a differential operational amplifier 11. An input signal having opposite polarity of the sampling capacitors C1, C2 is sampled. |
