A low power 8th order elliptic low-pass filter for a CMMB tuner |
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| Authors: | Gong Zheng Chen Bei Hu Xueqing Shi Yin Dai Fa Foster |
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| Affiliation: | 1. Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2. Department of Electrical and Computer Engineering, Auburn University, Auburn, AL 36849-5201, USA |
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| Abstract: | This paper presents an 8th order active-RC elliptic low-pass filter(LPF) for a direct conversion China Mobile Multimedia Broadcasting(CMMB) tuner with a 1 or 4 MHz -3 dB cutoff frequency(f_(-3dB)).By using a novel gain-bandwidth-product(GBW) extension technique in designing the operational amplifiers(op-amps), the proposed filter achieves 71 dB stop-band rejection at 1.7f_(-3dB) to meet the stringent CMMB adjacent channel rejection(ACR) specifications while dissipates only 2.8 mA/channel from a 3 V supply,i... |
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| Keywords: | CMMB tuner IC continuous-time filter active-RC filter low power analog filter gain-bandwidth-product extension CMRR |
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