Power saving method using interleaved programmable gain amplifier and A/D converters for digital imaging devices
1. Field of the Invention For use in a low-power digital imaging devices, for example a low-power single CCD-based digital camera, particularly in a battery-operated camera, a method for implementing video signal processing is provided wherein a single amplifier is employed in switched but parallel...
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Format | Patent |
Language | English |
Published |
29.01.2002
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Abstract | 1. Field of the Invention
For use in a low-power digital imaging devices, for example a low-power single CCD-based digital camera, particularly in a battery-operated camera, a method for implementing video signal processing is provided wherein a single amplifier is employed in switched but parallel and uncorrelated signal paths in a manner which avoids fixed pattern noise that would be introduced by mismatches in gain and offset in various paths. The desired effect is achieved through use of a controller that switches appropriate sets of capacitors in parallel paths to establish different gains for each pixel component. The invention achieves power savings and flexibility to independently control gain of each color component. |
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AbstractList | 1. Field of the Invention
For use in a low-power digital imaging devices, for example a low-power single CCD-based digital camera, particularly in a battery-operated camera, a method for implementing video signal processing is provided wherein a single amplifier is employed in switched but parallel and uncorrelated signal paths in a manner which avoids fixed pattern noise that would be introduced by mismatches in gain and offset in various paths. The desired effect is achieved through use of a controller that switches appropriate sets of capacitors in parallel paths to establish different gains for each pixel component. The invention achieves power savings and flexibility to independently control gain of each color component. |
Author | Opris, Ion E |
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References | "CCD Signal Proces For Electronic Cameras," Analog Devices, AD9802 (1997). W. Bright, "8b 75MSample/s 70m W Parallel Pipelined ADC Incorporating Double Sampling," ISSCC98, Feb. 6, 1998 IEEE 0-7803-4344-1/98 p. 146. Hanlon (5229772) 19930700 Michel (4806874) 19890200 Tomizuka (5661522) 19970800 Manelsdorf et al. (5736886) 19980400 Tamayama (5572155) 19961100 Hirasawa (5216509) 19930600 Boisvert et al. (5329312) 19940700 Wang et al. (4652766) 19870300 Boisvert et al. (5276508) 19940100 |
References_xml | – year: 19930600 ident: 5216509 contributor: fullname: Hirasawa – year: 19961100 ident: 5572155 contributor: fullname: Tamayama – year: 19940700 ident: 5329312 contributor: fullname: Boisvert et al. – year: 19870300 ident: 4652766 contributor: fullname: Wang et al. – year: 19970800 ident: 5661522 contributor: fullname: Tomizuka – year: 19890200 ident: 4806874 contributor: fullname: Michel – year: 19930700 ident: 5229772 contributor: fullname: Hanlon – year: 19980400 ident: 5736886 contributor: fullname: Manelsdorf et al. – year: 19940100 ident: 5276508 contributor: fullname: Boisvert et al. |
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Snippet | 1. Field of the Invention
For use in a low-power digital imaging devices, for example a low-power single CCD-based digital camera, particularly in a... |
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Title | Power saving method using interleaved programmable gain amplifier and A/D converters for digital imaging devices |
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