Title :
CCII-based current-mode active-RC filter with image rejection in 0.18 µm CMOS
Author :
Ye Zhan ; Zhigong Wang ; Yiqiang Wu ; Jianping Chen
Author_Institution :
Inst. of RF-&OE-ICs, Southeast Univ., Nanjing, China
Abstract :
A current-mode active-RC filter is presented in this paper. With the center frequency of 2MHz and bandwidth 1.6MHz,the filter is a 3rd order complex band-pass filter. A fully differential current amplifier (FDCA) based on second-generation current conveyor (CCII) is introduced. Furthermore, programmable capacitor array and adjustable DC bias are used to help tuning the filter. The filter is designed in full custom design flow with standard SMIC 0.18μm CMOS technology. Post simulation results exhibit that the GF (gain flatness) of passing-band is within 2.5dB, IRR (image reject ratio) and ACS (adjacent channel selectivity) both exceed 35dB.
Keywords :
CMOS integrated circuits; RC circuits; band-pass filters; current conveyors; current-mode circuits; differential amplifiers; integrated circuit design; 3rd order complex band-pass filter; ACS; CCII-based current-mode active-RC filter; DC bias; FDCA; SMIC CMOS technology; adjacent channel selectivity; bandwidth 1.6 MHz; frequency 2 MHz; fully differential current amplifier; gain flatness; image rejection ratio; programmable capacitor array; second-generation current conveyor; size 0.18 mum; Bandwidth; CMOS integrated circuits; CCII; FDCA; active-RC; complex filter; leapfrog;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2014 IEEE International Conference on
DOI :
10.1109/EDSSC.2014.7061160
