Title :
A wideband CMOS voltage-controlled oscillator with switched-capacitor array
Author :
Shu, Ran ; Subramanian, Viswanathan ; Boeck, George ; Wu, Jianhui ; Lu, Shengli
Author_Institution :
Microwave Eng. Lab., Berlin Inst. of Technol., Berlin, Germany
Abstract :
In this paper, a wideband CMOS LC VCO operating from 1.8 GHz to 3.0 GHz has been presented. The VCO is realized utilizing a standard 0.18 μm CMOS technology. The design utilizes 6-bit binary switched-capacitor array to realize 55% tuning range. An automatic frequency calibration (AFC) circuit that could generate the control-code to select the optimum frequency sub-band is also designed. The measurement results showed that the realized VCO exhibits a wide tuning range from 1.75 GHz~3.04 GHz. At the center frequency of 2.4 GHz, a phase noise performance of -101 dBc/Hz at 100 KHz offset and -122 dBc/Hz at 1 MHz offset has been achieved.
Keywords :
CMOS integrated circuits; MMIC oscillators; UHF oscillators; switched capacitor networks; voltage-controlled oscillators; CMOS technology; automatic frequency calibration circuit; binary switched-capacitor array; frequency 1.8 GHz to 3 GHz; size 0.18 mum; wideband CMOS LC VCO; wideband CMOS voltage-controlled oscillator; Automatic frequency control; CMOS technology; Circuit optimization; Phase locked loops; Phase noise; Tuning; Varactors; Voltage; Voltage-controlled oscillators; Wideband; 0.18 µm CMOS; automatic calibration circuits; switched-capacitor array; voltage-controlled oscillator (VCO); wide tuning range;
Conference_Titel :
Microwave Conference, 2010 German
Conference_Location :
Berlin
Print_ISBN :
978-1-4244-4933-0
Electronic_ISBN :
978-3-9812668-1-8
