A Low Power SiGe BiCMOS Baseband Circuitry for a Direct Conversion CMMB Tuner IC
An analog baseband circuitry for a China Mobile Multimedia Broadcasting (CMMB) direct conversion tuner IC is introduced in this paper. It includes an 8th order channel select filter with sharp transition band and utilizes a novel gain-bandwidth-product (GBW) extension technique in designing the low power, high speed operational amplifiers (Op-Amps) of the active-RC filter. A current steering type variable gain amplifier (VGA) is adopted to provide more than 40 dB baseband gain range and an on-chip DC offset cancellation (DCOC) circuit is designed to prevent the baseband chain from saturation due to DC offsets. The chip is fabricated in a 0.35-um SiGe BiCMOS process and consumes 15mA from 3V supply with filters f.3dB at 4 MHz.
Zheng Gong Bei Chen Xueqing Hu Yin Shi Fa Foster Dai
Suzhou-CAS Semiconductors Integrated- Technology Research Center Suzhou, Jiangsu, 215021, P.R.China Department of Electrical Computer Engineering Auburn University Auburn Alabama, 36849-5201, US
国际会议
上海
英文
478-481
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）