A 300-mW Programmable QAM Transceiver for VDSL Applications(Microwaves, Millimeter-Waves)

概要

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This paper describes the design of a programmable QAM transceiver for VDSL applications. A 12-b DAC with 64-dB spurious-free dynamic range (SFDR) at 75-MS/s and an 11-b ADC with 72.3-dB SFDR at 70-MS/s are integrated in this complete physical layer IC. A digital IIR notch filter is included in order to not interrupt existing amateur radio bands. The proposed dual loop AGC adjusts the gain of a variable gain amplifier (VGA) to obtain maximum SNR while avoiding saturation. Using several low power techniques, the total power consumption is reduced to 300-mW at 1.8-V core and 3.3-V I/O supplies. The transceiver is fabricated in a 0.18-μm CMOS process and the chip size is 5-mm×5-mm. This VDSL transceiver supports 13-Mbps data rate over a 9000-ft channel with a BER <10^<-7>.
社団法人電子情報通信学会の論文
2004-08-01