Skip to main content
Article
A CMOS Time to Digital Converter IC with 2 Level Analog CAM
Departmental Papers (ESE)
  • Eric J. Gerds, University of Pennsylvania
  • Jan Van der Spiegel, University of Pennsylvania
  • Rick Van Berg, University of Pennsylvania
  • Hugh H. Williams, University of Pennsylvania
  • L. Callewaert, Kath. University of Leuven
  • W. Eyckmans, Kath. University of Leuven
  • Willy Sansen, Kath. University of Leuven
Document Type
Journal Article
Date of this Version
9-1-1994
Comments
Copyright 1994 IEEE. Reprinted from IEEE Journal of Solid State Circuits, Volume 29, Issue 9, September 1994, pages 1068-1076.
Publisher URL: http://dx.doi.org/10.1109/4.309902

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Pennsylvania's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
Abstract

A time to charge converter IC with an analog memory unit (TCCAMU) has been designed and fabricated in HP's CMOS 1.2-µm n-well process. The TCCAMU is an event driven system designed for front end data acquisition in high energy physics experiments. The chip includes a time to charge converter, analog Level 1 and Level 2 associative memories for input pipelining and data filtering, and an A/D converter. The intervals measured and digitized range from 8-24 ns. Testing of the fabricated chip resulted in an LSB width of 107 ps, a typical differential nonlinearity of < 35 ps, and a typical integral nonlinearity of < 200 ps. The average power dissipation is 8.28 mW per channel. By counting the reference clock, a time resolution of 107 ps over ~ 1 s range could be realized.

Keywords
  • time to charge converter,
  • CAM,
  • pipelining,
  • associative memory
Citation Information
Eric J. Gerds, Jan Van der Spiegel, Rick Van Berg, Hugh H. Williams, et al.. "A CMOS Time to Digital Converter IC with 2 Level Analog CAM" (1994)
Available at: http://works.bepress.com/jan_vanderspiegel/28/