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
Two-stage wideband amplifier - schematic

The bandwidth is 5 to 130 MHz, with a noise figure only marginally greater than the 2 dB specified for a single stage circuit.



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