Highly anti-jamming operational amplifier analog switch

Using analog electronic switches instead of contact switches can prevent sparks and radio frequency interference. The picture above shows an extremely equivalent mechanical circuit using a junction field effect transistor and an operational amplifier . When the input signal Ue (or Ue1, Ue2...) has a control signal (high level 10V) at terminal B, the junction field effect transistor is turned on, and the output signal Ua (reverse phase) is generated through the operational amplifier. The figure below shows a similar circuit.

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