SIMPLE_ANALOG_AVERAGING_CIRCUIT

Published:2009/6/18 21:34:00 Author:May | From:SeekIC

At times，an analog circuit that averages rather than sums call be quite handy. You won’t usually find this type of circuit in op-amp books，possibly because the op amp is used only as a buffer Forbest accuracy，an FET should be used with the offset adjusted out.In addition，the“averagtng”resistors（R1 through R4）should be of Close tolerance.Looldng at the test circuit，op amps 1 through 4 are used to alleviate interaction between adjustment potentiometers P1 through P4 and so that R1 through R4 see the same low impedance.The table shows some arbitrarily set voltages and the resulting output voltage across RL．



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