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Title: A Digitization Scheme of Sub-Microampere Current Using a Commercial Comparator with Hysteresis and FPGA-Based Wave Union TDC

Abstract

A digitization scheme of sub-microampere current using a commercial comparator with adjustable hysteresis and FPGA-based Wave Union TDC has been tested. The comparator plus a few passive components forms a current controlled oscillator and the input current is sent into the hysteresis control pin. The input current is converted into the transition times of the oscillations, which are digitized with a Wave Union TDC in FPGA and the variation of the transition times reflects the variation of the input current. Preliminary tests show that input charges < 25 fC can be measured at > 50 M samples/s without a preamplifier.

Authors:
 [1]
  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1419024
Report Number(s):
FERMILAB-CONF-12-615-E
1204870
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Journal Name:
JINST
Additional Journal Information:
Journal Volume: 8; Conference: Topical Workshop on Electronics for Particle Physics, Oxford, UK, 09/17-09/21/2012
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Wu, Jinyuan. A Digitization Scheme of Sub-Microampere Current Using a Commercial Comparator with Hysteresis and FPGA-Based Wave Union TDC. United States: N. p., 2012. Web. doi:10.1088/1748-0221/8/01/C01019.
Wu, Jinyuan. A Digitization Scheme of Sub-Microampere Current Using a Commercial Comparator with Hysteresis and FPGA-Based Wave Union TDC. United States. doi:10.1088/1748-0221/8/01/C01019.
Wu, Jinyuan. Thu . "A Digitization Scheme of Sub-Microampere Current Using a Commercial Comparator with Hysteresis and FPGA-Based Wave Union TDC". United States. doi:10.1088/1748-0221/8/01/C01019. https://www.osti.gov/servlets/purl/1419024.
@article{osti_1419024,
title = {A Digitization Scheme of Sub-Microampere Current Using a Commercial Comparator with Hysteresis and FPGA-Based Wave Union TDC},
author = {Wu, Jinyuan},
abstractNote = {A digitization scheme of sub-microampere current using a commercial comparator with adjustable hysteresis and FPGA-based Wave Union TDC has been tested. The comparator plus a few passive components forms a current controlled oscillator and the input current is sent into the hysteresis control pin. The input current is converted into the transition times of the oscillations, which are digitized with a Wave Union TDC in FPGA and the variation of the transition times reflects the variation of the input current. Preliminary tests show that input charges < 25 fC can be measured at > 50 M samples/s without a preamplifier.},
doi = {10.1088/1748-0221/8/01/C01019},
journal = {JINST},
number = ,
volume = 8,
place = {United States},
year = {2012},
month = {11}
}

Conference:
Other availability
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