I am working on the non-inverting amplifier using a single supply, which can amplify bipolar input signal. Non-inverting amplifier is working fine without any issues, only the negative portion of the input is clipped. The schematic is shown below.
To amplify both positive and negative portion of the circuit, I gave DC bias voltage at non-inverting terminal, but in the output I was not getting any signal. Schematic is shown below. I even simulated the circuit and I got proper waveform amplifying both positive and negative signal, but while making, it is not working. I am getting flat line in the oscilloscope.
Best Answer
Good start, just one more thing to add... R1 cannot be DC-grounded. It must be AC-grounded with a capacitor. You would choose the capacitor value so that its reactance is equal to (or less than) R1 at the lowest frequency that's important to you. For example, if R1 is 1000 ohms, and you are amplifying audio where 20 Hz is the lowest audio frequency, C1 (below) is about 10uF.
With such a low DC supply voltage, a rail-to-rail opamp is a good choice...many common opamps cannot provide enough output signal swing with a +5V supply.
simulate this circuit – Schematic created using CircuitLab