A 1.2 V dual-channel 10 bit pipeline ADC in 55 nm CMOS for WLAN receivers  

作　　者：龚正 胡雪青 颜峻 石寅 

机构地区：[1]Institute of Semiconductors,Chinese Academic of Sciences

出　　处：《Journal of Semiconductors》2013年第9期112-116,共5页半导体学报（英文版）

摘　　要：A power-efficient technique for pipeline analog-to-digital converters （ADCs） is proposed. By sharing amplifiers between 1/Q channels, the power dissipation of the ADCs is reduced by almost one-half compared to conventional topologies, which makes this technique suitable for low-power direct-conversion WLAN receivers. A dual-channel ADC test chip is fabricated in 55 nm CMOS technology. The 10 bit ADC with on-chip reference generators dissipates 19.2 mW per channel from a 1.2 V supply. At an 80 MS/s sample rate, the measured spuriousfree dynamic range, signal-to-noise and distortion ratio, and corresponding effective number of bits are 69.5 dB, 56.8 dB and 9.14 bits with a 1 MHz input frequency （fn）, and 61.3 dB, 56.5 dB and 9.09 bits with a 15 MHz fn, respectively. The active area is 1.01 x 0.77 mm2.A power-efficient technique for pipeline analog-to-digital converters （ADCs） is proposed. By sharing amplifiers between 1/Q channels, the power dissipation of the ADCs is reduced by almost one-half compared to conventional topologies, which makes this technique suitable for low-power direct-conversion WLAN receivers. A dual-channel ADC test chip is fabricated in 55 nm CMOS technology. The 10 bit ADC with on-chip reference generators dissipates 19.2 mW per channel from a 1.2 V supply. At an 80 MS/s sample rate, the measured spuriousfree dynamic range, signal-to-noise and distortion ratio, and corresponding effective number of bits are 69.5 dB, 56.8 dB and 9.14 bits with a 1 MHz input frequency （fn）, and 61.3 dB, 56.5 dB and 9.09 bits with a 15 MHz fn, respectively. The active area is 1.01 x 0.77 mm2.

关 键 词：ADC amplifier sharing I/Q amplifier sharing WLAN receiver reference buffer 

分 类 号：TN925.93[电子电信—通信与信息系统] TN792[电子电信—信息与通信工程]