Title :
A Low-power Tunable Bandpass Amplifier for RF Applications
Author :
Lin, Kun-Yi ; Weng, Ro-Min
Author_Institution :
Inst. of Electr. Eng., Nat. Dong Hwa Univ., Hualien
Abstract :
A bandpass amplifier with enhanced image rejection for radio frequency (RF) applications is presented. The proposed amplifier using MOS varactors and active inductors is designed for both 2.4GHz bandpass and 2.8GHz image-rejection notch filtering. With active inductors and MOS varactors, this amplifier needs no passive devices. With 2V supply voltage, the circuit exhibits gain of 20dB and image-rejection of 86dB. The tuning range of the image frequency is from 2.8 GHz to 2.87GHz with power dissipation of 3.2mW
Keywords :
CMOS analogue integrated circuits; UHF amplifiers; UHF filters; active filters; band-pass filters; inductors; notch filters; varactors; 0.18 micron; 2 V; 2.4 GHz; 2.8 to 2.87 GHz; 20 dB; 3.2 mW; MOS varactors; RF applications; active inductors; image rejection; notch filtering; tunable bandpass amplifier; Active inductors; Band pass filters; Circuit optimization; Filtering; Radio frequency; Radiofrequency amplifiers; Tunable circuits and devices; Tuning; Varactors; Voltage;
Conference_Titel :
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0387-1
DOI :
10.1109/APCCAS.2006.342162
