Title :
A/D processing of video signals at very high pixel rates
Author :
Turko, B.T. ; Albright, K.L. ; King, N.S.P. ; Yates, G.J.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
fDate :
8/1/1994 12:00:00 AM
Abstract :
The video wave-form of CCD photocharge, clocked out at very high pixel rates, is a sequence of narrow voltage pulses. Pulse height is proportional to the recovered charge. A method and circuits are described for digitizing such waveforms in a 10-bit range at rates exceeding 75 MHz. Signal processing includes a wide-band clamping amplifier, a self-clocked peak detector, a very fast track/hold amplifier and a 75 MSPS, 10-bit flash converter. Digital data can be stored either in a local high speed RAM or transferred by a fast fiber-optic link to the remote digital storage. Test results (such as linearity, dynamic range and signal/noise ratio) are also given
Keywords :
CCD image sensors; analogue processing circuits; analogue-digital conversion; detector circuits; image processing equipment; random-access storage; sample and hold circuits; video amplifiers; video signals; 10-bit flash converter; 10-bit range; 75 MHz; A/D processing; CCD photocharge; digitization; dynamic range; fast fiber-optic link; linearity; local high speed RAM; narrow voltage pulses; peak detector/stretcher; pulse height; recovered charge; remote digital storage; self-clocked peak detector; signal processing; signal/noise ratio; very fast track/hold amplifier; very high pixel rates; video signals; video waveform; wide-band clamping amplifier; Broadband amplifiers; Charge coupled devices; Circuits; Clamps; Clocks; Detectors; Pulse amplifiers; Signal processing; Video signal processing; Voltage;
Journal_Title :
Nuclear Science, IEEE Transactions on
