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A Switched-Capacitor Programmable-Gain Amplifier for High-Definition Video Analog Front-Ends
ZHANG Hong 1 * #,LI Xue 2,CHEN Yongliang 2,CHENG Jun 2
1.School of Electronic and Information Engineering, Xi\'an Jiaotong University, Xi\'an 710049
2.School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049
*Correspondence author
#Submitted by
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Funding: Research Foundation for the Doctoral Program of Higher Education of China, Grant （No.No. 20090201120025）
Opened online: 6 January 2013
Accepted by: none
Citation: ZHANG Hong,LI Xue,CHEN Yongliang.A Switched-Capacitor Programmable-Gain Amplifier for High-Definition Video Analog Front-Ends[OL]. [ 6 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4505819
 
 
A switched-capacitor programmable gain amplifier (PGA) for high-definition video analog front-ends (AFEs) is presented. The PGA also acts as the sample and holder of the ADC to reduce the power consumption and chip area of the whole AFE. The 9-bit gain and offset control DACs are embedded into the switched capacitor networks of the PGA. Simulated results show that the PGA achieves a gain range of 0.9 to 2.4V/V, and an offset control range of -230 to 230mV while consuming 10.1mA from a 1.8V power supply. An AFE based on the proposed PGA is fabricated in TSMC 0.18um process. Measurement results show that the AFE achieves the capability to process variant HDTV signals up to 1080p YPbPr and computer video signals up to UXGA (1600x1200 @75Hz).
Keywords:Analog IC design; PGA; Video; Analog front-end
 
 
 

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