The synthesis of compensation circuits of parasitic capacitances of the output circuit of classical broadband amplifiers of signal and telecommunications systems
The paper considers the conditions of synthesis of a special compensation circuit (CC) of parasitic capacitance connected with an output of classic transistor stage (TS) from the common ground of the theory of automatic control systems. The purpose of CC is to extend the frequency range of TS, especially at high-resistance loads, including active ones. It is shown that the connected CC should contain a differentiating link. The analysis of scheme stability of a broadband amplifier (BA) with CC is carried out. The analytical expressions are obtained to estimate maximum advantage on bandwidth and transient time in classic transistor stages (circuits with common-emitter, common base). Three main options of practical implementation of CC in the basis of non-inverting voltage/current followers are considered.