Low power consumption high speed CMOS dual-modulus 15/16 prescaler for optical and wireless communications

• Published in: Optoelectronics letters Vol. 7; no. 5; pp. 341 - 345
• Main Author: 刘慧敏 张小兴 戴宇杰 吕英杰
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University of Technology 01.09.2011
• Subjects: CMOS工艺; Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; 互补金属氧化物半导体; 低功耗; 光通信; 双模; 无线通信系统; 预分频器; 频率合成器; Frequency Synthesizer; NAND Gate; Control Logic; Complementary Metal Oxide Semiconductor; Critical Path
• ISSN: 1673-1905; 1993-5013
• DOI: 10.1007/s11801-011-0173-1

Frequency synthesizer is an important part of optical and wireless communication system. Low power comsumption prescaler is one of the most critical unit of frequency synthesizer. For the frequency divider, it must be programmable for channel selection in multi-channel communication systems. A dual-modulus prescaler （DMP） is needed to provide variable division ratios. DMP is considered as a critical power dissipative block since it always operates at full speed. This paper introduces a high speed and low power complementary metal oxide semiconductor （CMOS） 15/16 DMP based on true single-phase- clock （TSPC） and transmission gates （TGs） cell. A conventional TSPC is optimized in terms of devices size, and it is resimulated. The TSPC is used in the synchronous and asynchronous counter. TGs are used in the control logic. The DMP circuit is implemented in 0.18 μm CMOS process. The simulation results are provided. The results show wide operating frequency range from 7.143 MHz to 4.76 GHz and it comsumes 3.625 mW under 1.8 V power supply voltage at 4.76 GHz.