Switching noise insensitive power module for infrared imaging system

Yong-quan An; Yan Zhao

doi:10.1117/12.811794

28 January 2009 Switching noise insensitive power module for infrared imaging system

Yong-quan An, Yan Zhao

Proceedings Volume 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments; 715631 (2009) https://doi.org/10.1117/12.811794
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

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.

Citation Download Citation

Yong-quan An and Yan Zhao "Switching noise insensitive power module for infrared imaging system", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 715631 (28 January 2009); https://doi.org/10.1117/12.811794

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