Analog signal processor for electronic imaging system providing

Details Analog signal processor for electronic imaging system providing Analog signal processor for electronic imaging system providing

1992-11-05

1994-01-04

Powell, Mark R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, 358 41, 358 27, 358160, 358172, 307353, 328151, 328104, H04N 907, H04N 514

Patent

active

052765083

ABSTRACT:
An electronic imaging system employes a linear charge coupled device (CCD) imaging unit and a unique analog signal processor (ASP) implemented on a single integrated circuit chip. The ASP has a plurality of matched signal channels for receiving respective pixel image signals from the CCD unit and for providing respective color-component image signals, such as red, green and blue color-components, having amplitude balance and accurately referenced "zero" levels. The ASP also has a plurality of matched multiplexing units which directly combine the separate color-component signals from the signal channels into a single full color output image signal with the color components in timed sequence. The output signal from the ASP is applied to an analog to digital (A/D) converter and then to a digital signal processor (DSP). By virtue of its unique design, the ASP has a dynamic range of greater than 12-bits with an output signal frequency as high as 20 MHz for high throughput rates.

REFERENCES:
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patent: 4484226 (1984-11-01), Parker
patent: 4745461 (1988-05-01), Shirai
M. H. White, et al., "Characterization of Surface Channel CCD Image Arrays at Low Light Levels", IEEE Journal of Solid-State Circuits, vol. SC-9, No. 1, Feb. 1974, pp. 1-13.
M. Nayebi and B. A. Wooley, "A 10-bit Video BiCMOS Track-and-Hold Amplifier", IEEE Journal of Solid-State Circuits, vol. 24, No. 6, Dec. 1989, pp. 1507-1516.
M. Nayebi, "Video BiCMOS Sampling Systems" (Doctoral Thesis), Stanford University, Stanford, Calif., 94305.

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