The techniques of modern network theory have been applied to some of the problems of pulse shaping in nuclear pulse amplifiers. A technique referred to as pole‐zero cancellation has been evolved which permits a system designer to specify the pulse decay time at the amplitude‐limiting section of the system and the pulse shape at the final output as completely independent parameters. The deadtime of the amplifier system can be reduced by orders of magnitude without degrading the signal‐to‐noise ratio. In addition, the usual charge‐injection system has been examined, and a simple, linear lumped‐element network has been evolved which makes possible an improved evaluation of the amplifier response to detector charge pulses.