Simulating transistor and other nonlinear circuits

Abstract

Analog simulations of nonlinear systems involving al gebraic loops or high-gain amplifiers are often unsta ble. Simple stabilizing measures, which are often successful, are suggested, and a method is given for producing alternative flow diagrams in cases of difficulty. The illustrations are of simulations of transistor circuits with exponential functions de scribing the DC junction characteristics and of a varactor circuit with a square-root law for the charge-voltage relationship.