This is a Simple Summing Amplifier Circuit Diagram. This circuit uses a CA3193 BiMOS op amp. Because input noise of the amplifier is increased by Rp/ Rl//R2/ /R3, and the gain that a single input will amplify is the gain of only one of the input channels (Rp/ Rl), for good noise performance, use the smallest number of inputs.
Simple Summing Amplifier Uses CA3193 Circuit Diagram
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