A simulation of 450mhz amplifier with distributed output using bipolar junction transistor from Ni-circuit design

Abstract

A study of the frequency response of a single stage common emitter amplifier, emitter –coupled amplifier and multistage distributed amplifier is carried out. In this work, a single stage common emitter amplifier is designed. Two such amplifiers were connected in a differential pair and designed. In this second design, the coupling between the stages is provided by the emitter resistor which carries the combined currents of the pair. From the previous stages, the multistage distributed amplifier was also designed. Such an arrangement employs two transmission lines, one for the input and the other for the output. Results obtained from simulation exercise indicate significant improvement in the gain, bandwidth and gain bandwidth product of the distributed amplifier.

Keywords: Simulation, Amplifier, Bipola, Transmitter, Circuit Design