Broadband amplifier incorporating a circuit device effective to improve frequency response

摘要

A broadband amplifier comprising insulated collector vertical pnp transistors, a circuit device effective to improve frequency response, and a final stage comprising a so-called complementary pair formed of an npn transistor and a pnp transistor having emitters connected to each other and to an epitaxial layer n of the insulated collector vertical pnp transistor incorporated in the gain circuit of said amplifiers. The complementary pair afford minimization of the junction parasitic capacitances of the aforesaid vertical pnp transistor.