Wave Generation and Shaping Through Transistor Constant Current Characteristics

Abstract

A transistor biased to operate in the active region can be considered as a constant current source, or a constant current drain. The paper describes simple techniques of generating triangular, trapezoidal, staircase, etc., waveforms making use of this property of the transistor. The circuit developed uses a pair of PNP and NPN transistors in the constant current mode. Depending on the type of input gating waveforms used, a variety of waveforms can be generated.