| 摘要 |
A sample-hold circuit which outputs output differential signals by sample-holding input differential signals includes an input amplifying circuit that amplifies the input differential signal and has a first output terminal pair; a diffusion switch having a group of transistor switches that switches the first output terminal pair into reverse or non-reverse; a second input terminal pair connected to the first output terminal pair via the diffusion switch; and an integrator which has an output amplifier that outputs output differential signals amplified according to the differential signal of the second input terminal pair, a pair of capacitors each installed between the second input terminal pair and the second output terminal pair to charge or discharge current input to the second input terminal pair, and a reset circuit resetting a charging state of the capacitor pair. Since the first output terminal pair and the second input terminal are retained to the same potential, a signal distortion in the diffusion switch can be prevented.
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