Cart (Loading....) | Create Account
Close category search window

A high-speed, low-noise CMOS 16-channel charge-sensitive preamplifier ASIC for APD-based PET detectors

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Weng, M. ; Micrel Semicond., San Jose, CA, USA ; Mandelli, E. ; Moses, W.W. ; Derenzo, S.E.

A high-speed, low-noise 16-channel amplifier IC has been fabricated in the UP 0.5 μm CMOS process. It is a prototype for use with a PET detector which uses a 4×4 avalanche photodiode (APD) array having 3 pF of capacitance and 75 nA of leakage current. This requires that the preamplifier have a fast rise time (a few ns) in order to generate an accurate timing signal, low noise in order to accurately measure the energy of the incident gamma radiation, and high density in order to read out 2-D arrays of small (2 mm) pixels. A single channel consists of a charge-sensitive preamplifier followed by a pad-driving buffer. The preamplifier is reset by an NMOS transistor in the triode region which is controlled by an externally supplied current. The IC has 16 different gain settings which were measured to range from 2.085 mV/fC to 10.695 mV/fC. The gain is determined by four switched capacitors in the feedback loop. The switch state is set by two digital input lines which control a 64-bit shift register on the IC. A preamplifier 10-90% rise time as low as 2.7 ns with no external input load and 3.6 ns with a load of 5.8 pF was achieved. For the maximum gain setting and 5.8 pF of input load, the amplifier had 400 electrons of RMS noise at a peaking time of 0.7 μs. The IC is powered by a +3.3 V supply drawing 60 mA.

Published in:

Nuclear Science Symposium Conference Record, 2002 IEEE  (Volume:1 )

Date of Conference:

10-16 Nov. 2002

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.