Optimal sampling of charge-coupled devices

Details Optimal sampling of charge-coupled devices Optimal sampling of charge-coupled devices

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85.1421h&link_type=abstract

Astronomical Journal, vol. 85, Oct. 1980, p. 1421-1424.

Statistics

Applications

4

Astrometry, Charge Coupled Devices, Noise Spectra, Signal To Noise Ratios, Astronomical Photometry, Electric Potential, Light Amplifiers, Matched Filters

Scientific paper

It is shown that when the output noise spectrum of a charge-coupled device is flat, the maximum signal-to-noise ratio is obtained using a differential-averaging sampling function (positive, then negative square wave sampling). However, in astronomical applications, where image quality rather than readout speed is more desirable, 1/f flicker noise on the on-chip amplifier dominates the noise spectrum. It is shown that even when 1/f noise dominates, the same differential-averaging sampling function yields a signal-to-noise ratio which is never more than 36% from optimum. The results were obtained using a matched-filter analysis.

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