- #1
hadroneater
- 59
- 0
I have a sinusoidal AC voltage with roughly Vrms = 50mV. I wanted to amplify with a non-inverting amplifier circuit with the LM358 op-amp. I used resistors of 100ohm and 10kohm for a theoretical gain of 100x. However, my output signal is rectified so that only the positive half of the signal shows. I reckon this is because the LM358 is a low power op-amp and only uses a single, positive power supply. What can I do to ensure that a full AC signal is amplified with the LM358? I thought of giving the input signal an offset using diodes but that seem to complicated.