Cascode Amplifiers

Common emitters feed into the common base in two stages. One transistor act as cascode transistor and the other act as an amplifier transistor. The Miller effect is the multiplication of the bandwidth robbing collector-base capacitance by voltage gain Av. in cascade amplifiers, the transistors are connected in series. Whereas in a cascode amplifier, transistors are connected in parallel. The graph compare input and output magnitude/phase high output impedance