Design of an Energy-efficient DPSK Receiver Using Injection-locking Technique

• Main Authors: Jian-You Chen, 陳建祐
• Other Authors: 林宗賢
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/02982127824344891490

碩士 === 國立臺灣大學 === 電子工程學研究所 === 101 === In short range wireless communication like multichannel neural recoding system and body area network (BAN), energy efficiency is critical under stringent power budget. Conventional mixer-based architecture suffers from power hungry mixers and frequency synthesizer may be a poor choose for this application. MUX-based PSK transmitter has been proposed to increase energy efficiency by achieving much higher data rate up to 20 Mbps. However, PSK receiver with high data rate and good energy efficiency has not been published yet. In this work, an energy-efficient 400-MHz DPSK receiver is implemented. The proposed DPSK receiver adopts injection locking technique to perform amplitude-to-phase conversion. This technique can demodulate the PSK modulated signal with envelope detector. The proposed receiver demodulates DPSK signal without using Costas loop and mixers, which leads to reduced power consumption and cost. An automatic gain control loop is also proposed to regulate the injection power by controlling the injection current to the DCO. The receiver is fabricated in TSMC 0.18-μm CMOS technology. It consumes 1.77 mW with 0.9-V supply. The system sensitivity is -63 dBm. The energy efficiency is 177 pJ/bit with 10-Mbps input signal.