Title :
A 30 GHz CMOS Frequency Synthesizer for V-Band Applications
Author :
Weng, Po-Shuan ; Lu, Liang-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A CMOS sub-harmonic frequency synthesizer suitable for V-band applications is presented in this letter. By employing distributed switches, the output swing of the voltage- controlled oscillator can be significantly enhanced while maintaining sufficient frequency tuning range for the second-harmonic extraction. With a direct injection-locked divide-by-two circuit and current-mode-logic dividers as the prescaler stage, a nested 2/3-cell-based retimed programmable counter is adopted for frequency synthesis. Based on the proposed architecture, a 30 GHz frequency synthesizer is implemented using a 0.18 μm standard CMOS process.
Keywords :
CMOS integrated circuits; circuit tuning; counting circuits; frequency dividers; frequency synthesizers; microwave switches; CMOS frequency synthesizer; V-band applications; current-mode-logic dividers; distributed switches; frequency 30 GHz; frequency tuning range; injection-locked divide-by-two circuit; nested 2/3-cell-based retimed programmable counter; prescaler stage; second-harmonic extraction; size 0.18 mum; standard CMOS process; voltage-controlled oscillator; CMOS integrated circuits; Frequency conversion; Frequency measurement; Frequency synthesizers; Synthesizers; Tuning; Voltage-controlled oscillators; Distributed band-selection switches; program mable divider; sub-harmonic frequency synthesizer;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2012.2206016
