Would you characterize this transistor amplifier in figure 8 as being inverting or non-inverting to outputs 2+ and 2- with the base terminal of transistor M1 being considered the input? Explain your answer.
By analyzing the plot for the circuit in figure 10, we can notice that the input signal (W1) reaches its maximum voltage, the output voltage on 2+ reaches its minimum value, therefore we can conclude that the amplifier has an inverting behavior.
Describe what happens to each of the output voltages (2+ and 2- ) as the input voltage (W1) increases or decreases.
The easiest way to analyze the output/input relationship with respect to the amplitude is to simulate the circuit using LTspice software. By decreasing the input voltage amplitude, we will notice a decrease in the amplitude of the output voltage. In the example below, the input signal has amplitude reduced to 2-volts peak-to-peak.