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Sample-and-hold amplifier circuit with SMP04 op amp and 10 g

2015-01-04 05:09  
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Sample-and-hold amplifier circuit with SMP04 op amp and 10 gain
The circuit will place SMP04 in the feedback loop of op amp OP490, when S Non / H = 0, OP490 feedback loop is turned off, SMP04 internal switch is closed, the op amp gain of the circuit is decided by the op-amp and the feedback resistor, the gain in figure is set to 10, the output terminal outputs the amplified sampled voltage. When S non / H = 1, SMP04 internal switch is turned off, the op amp OP490 feedback loop can not form.