Two-stage wideband amplifier
A wideband high gain configuration using two SL550s connected in series. The first stage is connected in common emitter configuration, the second stage is a common base circuit. Stable gains of up to 65 dB can be achieved by the proper choice of Rl and R2
The bandwidth is 5 to 130 MHz, with a noise figure only marginally greater than the 2 dB specified for a single stage circuit.