Single Supply Signal Amplification:
We are going to build a signal amplifier with a single power supply; four op amps, where one is used to create a fortified half‐supply, and the other three are used as three stages of amplification. We will use a 5V single‐supply for a set of four (MCP6004) op amps. Use one the op amps in this package to create a steady 2.5V (A simple voltage divider with two ~10k resistors fortified by a voltage follower.) We are going to name this potential “signal ground”. a.We will use the signal generator (1kHz sine, 50mVpp as the model for our input). We will connect the signal through a 100nF series coupling capacitor. The first stage of amplification is an inverting set‐up, with an input resistance of 100k and an amplification factor of 5. Connect the signal’s ground and the V+ of the amplifier to the “signal ground”. Since signal ground is connected to the scope’s common, observe the VDD and VSS with the scope (what do you see?). Check the output signal.
