Elimination of Undesirable Undershoot in the Operation and Testing of Nuclear Pulse Amplifiers

Abstract

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.

Low-noise voltage-sensitive preamplifier with output stabilization by pole-zero cancellation in the feedback circuit

“…6. 1 To simulate the response to signals from a proportional counter, the preamplifier was tested with steplike voltage signals from a random pulse generator. 5 for steplike input signals of 120 mV amplitude occurring randomly at a mean rate of 4 x 10"' signals/sec.…”

Comparison between the noise performance of current-mode and voltage-mode amplifiers

“…II. Its design needs no comment except for the fact that by choosing RoCo = R,fCf we apply pole-zero cancellation [23] to the transfer function which enables us to increase the value of R f, until its noise contribution becomes negligible. This technique, routinely applied in conventional nucleonic instrumentation, has only rarely been applied to the design of optical receivers [24] [25], although it is capable of practically eliminating the noise contribution of RI.…”

Comparison of Two Pole-Zero Cancellation Circuits for Fast Charge Sensitive Amplifier in CMOS Technology

“…2b) by applying the pole-zero cancellation (PZC) circuit [7]. The idea of PZC circuit is shown in fig.…”