Realization of a passive RTC (ratio to time converter) using a new conversion technique for charge division readout

F. Javanmardi, T. Sakae, Akihiro Nohtomi, Yusuke Uozumi, M. Matoba

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


A dynamic conversion method is introduced to realize a novel RTC (passive RTC) for the charge division readout position sensing. Almost all the methods used for ratio to time conversion are static methods and start the conversion process after the signal peak sensing. Then, the static RTCs are monopolar input converters. The dynamic conversion performs the conversion process during the position signal forming and is based on the ratio to time responses of delay transmission lines. Then, the dynamic RTCs based on this method are bipolar converters. For the dynamic conversion method the ratio can be converted to time at any adjustable moment on leading edges of the input signals. Using the leading edges of the signals decreases the conversion dead time for on-line readouts. A delay line, using this conversion method, is substituted for a conventional RTC which includes at least 20 active elements. Since the delay line is a passive element, it is possible to install it within the position sensitive chambers. Using the dynamic conversion method, the signals of a Backgammon pattern are converted to position and position resolutions of about 2% of the full length were achieved.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium & Medical Imaging Conference
EditorsO. Nalcioglu
Number of pages5
Publication statusPublished - 1997
Externally publishedYes
EventProceedings of the 1997 IEEE Nuclear Science Symposium - Albuquerque, NM, USA
Duration: Nov 9 1997Nov 15 1997


OtherProceedings of the 1997 IEEE Nuclear Science Symposium
CityAlbuquerque, NM, USA

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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