الفهرس 
chapter 1Only 14 pages are availabe for public view
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Abstract
Pulse shaper is a part of startup amplifier which is the most
important element in pulse shaping of a nuclear pulse. Startup
amplifier usually has three major stages: a differential preamplifier,
pulse shaper, and a discriminator.
This system is traditionally implemented on a Printed Circuit Board
(PCB) with discrete components which is deemed bulky, noisy, and
complicated. In this thesis, MATLAB is used for system level
analysis in order to simulate this system and to find out optimum
design parameters. Input signal pulses are modeled in M-file. Thermal
and flicker noises are taken into account as well. The designed shaper
is of Semi-Gaussian type. The optimum time constants and numbers
of integrators are determined from the system level analysis.
The pulse shaper transfer function is implemented using passive
elements. In practice, cascading passive filters together to produce
larger-order filters is difficult to implement accurately as the dynamic
impedance of each filter order affects its neighboring network.
However, to reduce the loading effect we can make the impedance of
each following stage lOx the previous stage. Then a proposal pulse
shaper is designed in CMOS technology. A Current Multiplier Cell
(CMC) is used to implement capacitors which use inverters and op-
amp only. The whole circuit is designed in a O.13llm IBM-CMOS
process