Software-aided time resolution doubler (TRD) operating as a TDC

M. M. Rashid, H. Matsumoto, O. Iwamoto, Akihiro Nohtomi, Yusuke Uozumi, T. Sakae, M. Matoba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A Ratio-to-Digital converter (RDC) is used to determine the position of ionization in a single wire position sensing proportional counter. In the RDC, the digital output is obtained by a TDC utilizing the principle of a linear discharge type ADC. The conversion time as well as the time resolution of this type of ADC is dependent on the frequency of the clock. An idea of a Time Resolution Doubler (TRD) has been conceived by applying a simple logic to the basic idea of a two-phase active TDC system to double the effective operating frequency of a TDC. The final output is obtained by the help of the data processing software. An attempt is made to minimize the problem of differential non-linearity, a factor that limits the practical use of a two-phase active TDC system. A prototype TRD based TDC has been developed for using in the RDC of this laboratory. Utilizing a 100 MHz clock, the TRD acts as an effective 200 MHz TDC and gives the RDC output with a full scale capacity of 8192 channels. The experimentally observed differential non-linearity of the TRD based TDC is comparable to that of a simple TDC.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium & Medical Imaging Conference
PublisherPubl by IEEE
Pages552-556
Number of pages5
Editionpt 1
ISBN (Print)0780314883
Publication statusPublished - 1994
EventProceedings of the 1993 IEEE Nuclear Science Symposium & Medical Imaging Conference - San Francisco, CA, USA
Duration: Oct 30 1993Nov 6 1993

Other

OtherProceedings of the 1993 IEEE Nuclear Science Symposium & Medical Imaging Conference
CitySan Francisco, CA, USA
Period10/30/9311/6/93

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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