Design and Simulation of a New Front-end Read-out Circuit based on Switched Capacitor Array (SCA)
Keywords:Switched capacitor array, Sample and hold, Transient recorder, Transient digitizer, leakage current
In this paper, a switched capacitor array (SCA) for front-end read-out circuit of silicon strip, Si(Li), CdZnTe and CsI detectors, etc., which has 7 channels and 448 sample/hold cells with up to 2 MHz sample rates, is designed. The circuit is completely made by CMOS technology and 64 switched capacitors per channel are used to record 7 parallel analog transient signals. Trigger and clock are provided by the combination of several counter rings with a number of logic chips. The readout is made in column and permits to read the entire channel at more than 32MHz rate. This paper will also describe a novel T-Network configuration which is used to eliminate leakage current in the reset switch for each integrator, and a Clock generator which is used to optimize the gate logic to ensure nonlinearity of the SCA less than 0.2% at the 2MHz sample rate.
S. A. Kleinfelder, A 4096 switched capacitor analog waveform storage integrated circuit. IEEE Trans Nucl Sci, 1990, 37 (3): 1230-1236.
L. Jeong-Sup and P. In-Cheol, Capacitor Array Structure and Switch Control for Energy-Efficient SAR Analog-to-Digital Converters IEEE Trans Nucl Sci, 2008.
P. Baron, D. Calvet, E. Delagnes, et al., AFTER, an ASIC for the Readout of Large T2K Time Projection Chambers. IEEE Trans Nucl Sci, 2008, 55(3):1744-1752.
E. T. Wembe., H. Su, Y. Gao, et al., Design and simulation of charge sensitive preamplifier with CMOS FET implemented as feedback capacitor Cfp. Nucl Sci Tech, 2008, 19(4): 241â€“245.
A. Wang, B. H. Calhoun, and A. P. Chandrakasan, Sub-Threshold Design for Ultra Low-Power Systems. New York: Springer-Verlag, 2006.
Y. Taur and T. H. Ning, Fundamentals of Modern VLSI Devices. Cambridge, U.K.: Cambridge Univ. Press, 2002.
Proteus 7.6 SP0. Labcenter Electronic, 1989-20
How to Cite
- Papers must be submitted on the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture, review, or thesis) and are not currently under consideration by another journal published by any other publisher.
- It is also the authors responsibility to ensure that the articles emanating from a particular source are submitted with the necessary approval.
- The authors warrant that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required.
- The authors ensure that all the references carefully and they are accurate in the text as well as in the list of references (and vice versa).
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Attribution-NonCommercial 4.0 International that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.