Keywords: op amp, low input offset voltage, precision, operational amplifier
IQ1 = (VCC - VBE) / (R3 + R2).The voltage across R4 is IQ1 × R4. Adjust R4 to cancel the DC level of the input signal. The output signal can then be monitored using DC couple on the oscilloscope. The circuit has a gain of +1. The advantage of this circuit is that the output is in phase with the input signal and draws negligible current from the signal source.
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APPLICATION NOTE 1144,AN1144, AN 1144, APP1144, Appnote1144, Appnote 1144
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