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Proceedings Paper

Switching noise insensitive power module for infrared imaging system
Author(s): Yong-quan An; Yan Zhao
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Paper Abstract

Existing switching mode power supply solutions cause unacceptable self-pollution within the infrared imaging system. The band unlimited PWM signal will be coupled to the input of ADC, and then be sampled. High order harmonics are aliased down to the frequency band of the image signal. With the use of the digital PWM controller, the switching frequency can be precisely synchronized with the ADC sampling clock. The predominant parts of the noise signal will be down converted into the DC signals and eliminated by image processing units. The noise immunity principle was tested and proved on an infrared image capture system.

Paper Details

Date Published: 28 January 2009
PDF: 4 pages
Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 715631 (28 January 2009); doi: 10.1117/12.811794
Show Author Affiliations
Yong-quan An, Beihang Univ. (China)
North Univ. of China (China)
Yan Zhao, Beihang Univ. (China)


Published in SPIE Proceedings Vol. 7156:
2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments

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