Title :
A new time calibration method for switched-capacitor array-based waveform samplers
Author :
Heejong Kim ; Chin-Tu Chen ; Ronzhin, Anatoly ; Ramberg, Erik ; Los, Sergey ; Murat, Pak ; Moses, W.W. ; Woon-Seng Choong ; Chien-Min Kao
Author_Institution :
Dept. of Radiol., Univ. of Chicago, Chicago, IL, USA
fDate :
Oct. 27 2013-Nov. 2 2013
Abstract :
We have developed a new time calibration method for DRS4 waveform sampler. The method is based on the correlation between differential amplitude and time interval of adjacent switched-capacitor cells responding to a simple saw-tooth shape pulses. In the experiment, saw-tooth pulse with 40ns period from a Tektronix AWG7104 is fed to DRS4 evaluation board for calibrating all 1024 cells of the board. The electronic time resolution of the DRS4 board with the new time calibration is measured to be ~5.6ps FWHM using two identical simulataneous Gaussian pulses. The time resolution dependencies on the delay and the sampling speed are measured also. The new method is applicable for other switched-capacitor array technology-based waveform samplers for precise time calibration.
Keywords :
calibration; switched capacitor networks; waveform generators; DRS4 evaluation board; DRS4 waveform sampler; Tektronix AWG7104; adjacent switched-capacitor cells; differential amplitude; electronic time resolution; identical simulataneous Gaussian pulse; simple saw-tooth shape pulses; switched-capacitor array; time 40 ns; time calibration; time interval; Calibration; Capacitors; Delays; Linearity; Pulse measurements; Semiconductor device measurement;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2013 IEEE
Conference_Location :
Seoul
Print_ISBN :
978-1-4799-0533-1
DOI :
10.1109/NSSMIC.2013.6829060
