Design and Development of Low-Power Multistage Amplifier Laboratory Kit for Electronic Engineering Education

A low-power multistage amplifier laboratory kit has been developed and tested for engineering education. The laboratory kit contains a multistage amplifier built by the basic transistor stages used in operational amplifiers. Each stage is implemented with discrete components. The key functional blocks of the circuit are a differential amplifier as an input stage, followed by a common-collector amplifier as a buffer and an output stage. The output stage includes common-emitter amplifier section with current-source load and output section with two complementary bipolar transistors. Moreover, it is possible to study the operational principle of the separate amplifier stages and the effect of the negative feedback to a multistage voltage amplifier at non-inverting operation. The proposed laboratory kit is intended for second-year students on the Bachelor degree program of “Electronic Engineering” at the Technical University of Sofia.