A Pseudodifferential Class AB DAC for Low-Power Wireless Transmitter

被引：2

作者：

Seo, Dongwon ^{[1
]}

Mishra, Manu ^{[1
]}

Sun, Bo ^{[1
]}

McAllister, Gene H. ^{[1
]}

机构：

[1] Qualcomm Inc, San Diego, CA 92121 USA

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2009年 / 56卷 / 10期

关键词：

Class A digital-to-analog converter (DAC); class AB DAC; code-dependent dc; DAC; fully differential; low-power wireless transmitter; pseudodifferential; CMOS; STRESS; DESIGN;

D O I：

10.1109/TCSI.2008.2012230

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A low spurious 12-bit 122.88-MS/s digital-to-analog converter (DAC) enabling a low-power wireless transmit (Tx) chain is proposed and demonstrated. Pseudodifferential class AB DACs are introduced, and the benefits of using them in wireless Tx paths are discussed. The major power savings are achieved in multistage baseband Tx filters and upconversion mixers by using code-dependent linearly scaled dc that is generated from class AB transmit DACs. A two-channel I/Q DAC core consumes 6 mA with a 1.3/2.2-V dual supply. The 0.18-mm(2) I/Q DAC core fabricated in a 65-nm digital CMOS process, along with a highly integrated digital baseband processor and radio frequency transceiver, achieves a 73-dB spurious free dynamic range, 61-dB signal-to-noise-plus-distortion ratio, and 70-dB total harmonic distortion for a 990-kHz sinusoid at a 122.88-MS/s sample rate.

引用

页码：2332 / 2340

页数：9

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