Free electronic circuit design and schematic diagram
This is JFET sample and hold circuit. In this circuit, the logic voltage is applied simultaneously to the sample and hold JFETs. Here is the circuit : The errors due to rds(on) of the JFETs can be minimized by matching feedback capacitance and resistance and input impedance. The circuit performance is greatly improved because of matched leakage currents of the […]
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The schematic diagram below shows a very simple sample-and-hold circuit using the CA3140 as the readout amplifier for the memory capacitor. The CA3080A is used as both input buffer amplifier and low feed-through transmission switch. System offset nulling is provided for CA3140 via its offset nulling pins. A load simulation of 2k and 30pF is shown in the schematic , […]
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