Translator Disclaimer
Paper
23 July 2014 Using dummy and pseudo-dummy amplifiers to correct for common mode CCD noise
Author Affiliations +
Abstract
Some modern CCD designs provide a dummy readout amplifier that is designed to be operated with the same clock and bias signals as the true amplifier in order to provide a measurement of clock induced and other common-mode noise signals in the true amplifier readout. In general the dummy output signal is subtracted electronically from the true output signal in a differential input preamplifier before digitization. Here we report on an alternative approach where both signals are digitized and the subtraction done in software. We present the results of testing this method of operation using the ARC SDSU generation III CCD controllers and an e2v CCD231 device and find it works well, allowing a noise figure of ~ 2:2 electrons to be reached in the presence of significantly higher (~ 6 electrons) pickup noise. In addition we test the effectiveness of using unused (but still genuine) readout amplifiers on the detector to provide a pseudo-dummy output, which we also find effective in cancelling common mode noise. This provides the option of implementing noise reduction on CCDs that are not equipped with dummy outputs at the expense of overall readout speed.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
I. A. Steele, C. J. Mottram, R. J. Smith, and R. M. Barnsley "Using dummy and pseudo-dummy amplifiers to correct for common mode CCD noise", Proc. SPIE 9154, High Energy, Optical, and Infrared Detectors for Astronomy VI, 915428 (23 July 2014); https://doi.org/10.1117/12.2056602
PROCEEDINGS
6 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

The Primordial Inflation Polarization Explorer (PIPER)
Proceedings of SPIE (July 23 2014)
DESI-GFA testbench facilities for CCDs characterization
Proceedings of SPIE (August 09 2016)
Control system of the VLT secondary mirror unit
Proceedings of SPIE (May 26 1998)
The CFHT CCD Detector
Proceedings of SPIE (November 08 1984)
Rubber focal plane for sky surveys
Proceedings of SPIE (December 24 2002)

Back to Top