High-Frequency Compensation of RC Amplifiers

The high-frequency compensation of single- and multistage resistance-coupled amplifiers is discussed with special reference to the transient response. Optimum parameters are given for a number of typical cases. It is shown that, for the simplest type of high-frequency compensation with one coil in the anode lead, staggering of the time constants in a multistage amplifier reduces the rise time to less than 45 per cent of the uncompensated value, as against a reduction to between 55 and 60 per cent for the case of identical stages. Other practical design considerations are also discussed.