> Are there any true analog adder circuits? Sure. Here is a semantics with an op-amp: https://www.tutorialspoint.com/linear_integrated_circuits_applications/li

> Are there any true analog adder circuits? Sure. Here is a semantics with an op-amp: https://www.tutorialspoint.com/linear_integrated_circuits_applications/linear_integrated_circuits_applications_arithmetic_circuits.htm#:~:text=An%20op%2Damp%20based%20adder,output%20is%20an%20amplified%20one https://www.tutorialspoint.com/linear_integrated_circuits_ap...