A discriminator and shaper circuit realized in CMOS technology for BABAR

Author

Ardalean, J. ; Chase, R.L. ; Hrisoho, A. ; Sen, S. ; Tocut, V. ; Truong, K. ; Wormser, G.

Author_Institution

CNRS, Orsay, France

Volume

1

fYear

1998

fDate

1998

Firstpage

12

Abstract

An analog chip is designed to receive from a PM, trough a 50 Ω coaxial cable signals rising in 3 ns, falling in 8 ns, and to provide: (i) digital signals for timing purposes, (ii) multiplexed analog output, proportional to the input, for spectral measurements. There are 8 channels per chip with a common gain adjustment for the preamplifier, and individual control for the offset and threshold setting. The discriminator sensitivity is 2 mV. The dynamic range is from 2 mV to 100 mV. The noise equivalent at the input is ≅100 μV. The RMS time dispersion is less than 500 ps for 3 mV threshold. The shaping amplifier is of bipolar shape with 80 ns peaking time and 2.5 V mean output voltage. The crosstalk between channels is less than 2%

Keywords

CMOS analogue integrated circuits; Cherenkov counters; discriminators; nuclear electronics; position sensitive particle detectors; pulse shaping circuits; semiconductor counters; BABAR; CMOS technology; analog chip; discriminator; shaper circuit; CMOS technology; Circuits; Coaxial cables; Crosstalk; Dynamic range; Multi-stage noise shaping; Preamplifiers; Semiconductor device measurement; Signal design; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE

Conference_Location

Toronto, Ont.

ISSN

1082-3654

Print_ISBN

0-7803-5021-9

Type

conf

DOI

10.1109/NSSMIC.1998.774788

Filename

774788