Title :
A 2.4-GHz spur-cancelled fractional-n frequency synthesizer with PFD/DAC structure for WSN application
Author :
Cheng, Shiwei ; Zhang, Ke ; Lu, Wenqing ; Liu, Yang ; Cao, Shengguo ; Zhou, Xiaofang ; Zhou, Dian
Author_Institution :
Fudan Univ., Shanghai
Abstract :
A 2.4-GHz wideband fractional-N frequency synthesizer utilizing PFD/DAC structure for Wireless Sensor Network (WSN) Application is presented. In this synthesizer, hybrid of phase/frequency detector and compensated digital-to-analog converter (PFD/DAC) is utilized to achieve phase noise performance as an integer-N synthesizer. The synthesizer is implemented with wide 400 kHz loop bandwidth and 4 us setting time. The chip occupies 1.9 mm2 and consumes 16.4 mA at 1.8-V supply.
Keywords :
digital-analogue conversion; frequency synthesizers; phase detectors; phase noise; wireless sensor networks; PFD/DAC structure; WSN; digital-to-analog converter; frequency 2.4 GHz; integer-N synthesizer; phase noise; phase/frequency detector; spur-cancelled fractional-n frequency synthesizer; wireless sensor network; Bandwidth; Charge pumps; Frequency synthesizers; Noise shaping; Phase frequency detector; Phase modulation; Phase noise; Radio frequency; Voltage-controlled oscillators; Wireless sensor networks; Fractional synthesizer; delta-sigma modulator; hybrid of PFD/DAC; spur cancellation;
Conference_Titel :
ASIC, 2007. ASICON '07. 7th International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4244-1132-0
Electronic_ISBN :
978-1-4244-1132-0
DOI :
10.1109/ICASIC.2007.4415726
