Title :
A high phase accuracy, low amplitude mismatch quadrature LO driver
Author :
Shuguang, Han ; Baoyong, Chi ; Zhihua, Wang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A 1.25∼1.35GHz CMOS high phase accuracy, low amplitude mismatch quadrature LO driver is presented, it consists of a high frequency amplifier, an integrated poly phase filter and an I/Q phase and magnitude calibration circuit (PMCC). PMCC is proposed to improve the phase accuracy and reduce the amplitude mismatch. The simulation shows the phase error with PMCC is reduced to one half and the amplitude mismatch is reduced to one quarter compared to the LO driver without PMCC. Moreover, the calibration circuit is also the buffer to drive mixers, so in this design, the additional buffer is not needed. The LO driver is implemented in 0.25μm CMOS process.
Keywords :
CMOS integrated circuits; HF amplifiers; driver circuits; oscillators; radiofrequency filters; 0.25 micron; CMOS process; amplitude mismatch; buffer circuit; high frequency amplifier; phase and magnitude calibration circuit; poly phase filter; quadrature LO driver; CMOS process; Calibration; Circuit simulation; Driver circuits; Filters; Frequency; Microelectronics; Modems; Transceivers; Virtual manufacturing;
Conference_Titel :
Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on
Print_ISBN :
0-7803-8511-X
DOI :
10.1109/ICSICT.2004.1436764