Title :
A wideband CMOS LC VCO with low tuning sensitivity for CMMB applications
Author :
Qin, Peng ; Jin, Jing ; Mao, Cui
Author_Institution :
Sch. of Micro-Electron., Shanghai Jiao Tong Univ. Shanghai, Shanghai, China
Abstract :
A dual core wideband voltage-controlled oscillator (VCO) with small VCO tuning gain fluctuation ( KVCO variation ) is presented. This integrated VCO has a wide tuning range from 1.8 GHz to 3.8 GHz, which can provide all desired frequency band for China Mobile Multimedia Broadcasting (CMMB) receiver. A 5-bit switched capacitor bank and a self-controlled varactor pair is used in each core to achieve required tuning range and small tuning sensitivity. Spot phase noise is -119.5 dBc/Hz at 1 MHz offset for 3.817 GHz output frequency while power dissipation is 3-4 mA from 1.5 V supply. This circuit is realized in 0.18-¿m CMOS technology and the total area is 530 × 440 ¿m2.
Keywords :
CMOS integrated circuits; mobile communication; phase noise; shot noise; tuning; varactors; voltage-controlled oscillators; CMMB applications; CMOS technology; China Mobile Multimedia Broadcasting receiver; KVCO variation; VCO tuning gain fluctuation; dual core wideband voltage-controlled oscillator; frequency band; low tuning sensitivity; power dissipation; self-controlled varactor; spot phase noise; switched capacitor bank; tuning range; wideband CMOS LC VCO; CMOS technology; Capacitors; Circuit optimization; Digital multimedia broadcasting; Fluctuations; Frequency; Multimedia communication; Tuning; Voltage-controlled oscillators; Wideband;
Conference_Titel :
Microelectronics & Electronics, 2009. PrimeAsia 2009. Asia Pacific Conference on Postgraduate Research in
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4668-1
Electronic_ISBN :
978-1-4244-4669-8
DOI :
10.1109/PRIMEASIA.2009.5397397
