Title :
A 22-GHz push-push CMOS oscillator using micromachined inductors
Author :
To-Po Wang ; Ren-Chieh Liu ; Hong-Yeh Chang ; Liang-Hung Lu ; Huei Wang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This letter presents a low phase noise 0.35-μm CMOS push-push oscillator utilizing micromachined inductors. This oscillator results in an improvement in phase noise compared with the previously published Si-based voltage-controlled oscillators (VCOs) around 20GHz. With the high-Q inductors introduced by the micromachined structure, the oscillator achieves an oscillating frequency of 22.2GHz while exhibiting an output power of -7.5dBm with a phase noise of -110.1dBc/Hz at 1-MHz offset. This work also demonstrates the highest operating frequency among previously published Si-based VCOs using micromachined structures.
Keywords :
CMOS analogue integrated circuits; inductors; micromachining; microwave integrated circuits; microwave oscillators; phase noise; voltage-controlled oscillators; 0.35 micron; 22.2 GHz; micromachined inductors; microwave oscillators; phase noise; push-push CMOS oscillator; CMOS process; CMOS technology; Circuits; Frequency; Inductors; Phase noise; Power generation; Q factor; Silicon; Voltage-controlled oscillators; Micromachined inductors; voltage-controlled oscillators (VCOs);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.860003
