This document analyzes the high frequency response of an amplifier. It discusses how the gain is reduced at high frequencies due to internal transistor capacitances and parasitic capacitances in the wiring. It presents equations to calculate the critical frequencies fHi and fH0 for the input and output networks. An example is provided to calculate these frequencies given circuit parameters. A Bode plot graph is shown indicating how the voltage gain decreases at -20dB/decade past fHi and -40dB/decade past fH0.