This document discusses multistage amplifiers, including capacitively-coupled and direct-coupled configurations. It explains that multistage amplifiers increase overall voltage gain by cascading multiple amplifier stages together, with the output of one stage feeding the input of the next. The overall voltage gain is the product of the individual stage gains. Capacitive coupling allows AC signals to pass between stages while preventing DC bias interference, but it reduces low-frequency response. Direct coupling provides better low-frequency performance by directly connecting stages without coupling capacitors. Loading effects, voltage gains, and DC voltages are also analyzed for a two-stage capacitively-coupled amplifier circuit example.