Title :
A Low Phase Noise Quad-Band CMOS VCO with Minimized Gain Variation for GSM/GPRS/EDGE
Author :
Samadian, Sohrab
Author_Institution :
Skyworks Solutions Inc., Irvine, CA
Abstract :
A differential LC VCO is presented for commercial quad-band GSM/GPRS/EDGE applications. The VCO is designed in 0.13 mum CMOS process and meets stringent phase noise specifications. A technique to minimize the VCO gain variation is presented which reduces the Kvco variation to plusmn14%; more than three times smaller than the previous solutions. This technique results in reduction of the delay mismatch between the amplitude and phase paths in a polar loop transmitter.
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF oscillators; cellular radio; packet radio networks; phase noise; voltage-controlled oscillators; 0.13 micron; CMOS process; EDGE; GPRS; GSM; delay mismatch reduction; differential LC VCO; minimized gain variation; phase noise; polar loop transmitter; quad-band CMOS VCO; CMOS process; Frequency; GSM; Ground penetrating radar; Inductors; Noise level; Phase locked loops; Phase noise; Topology; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378213
