Title :
Design of a fourth-order continuous-time filter for UWB receivers
Author :
Zhu, Xi ; Moritz, James ; Sun, Yichuang
Author_Institution :
Univ. of Hertfordshire, Hatfield
Abstract :
The design and implementation of a CMOS current- mode fourth-order Butterworth continuous-time leap-frog (LF) multiple loop feedback (MLF) lowpass filter is described. The filter is implemented using a fully-differential linear, low voltage and low power operational transconductance amplifier (OTA). PSpice simulations using a standard TSMC 0.18 mum CMOS process with 1.5 V power supply have shown that the cut-off frequency of the filter ranges from 240 MHz to 300 MHz and dynamic range is about 58 dB at 240 MHz of cut-off frequency. The power consumption of the filter is only from 22.3 to 55 mW. The total output noise density is about 390 nA/VHz.
Keywords :
Butterworth filters; CMOS integrated circuits; VHF filters; integrated circuit design; low-pass filters; operational amplifiers; radiofrequency integrated circuits; ultra wideband technology; CMOS current- mode process; OTA; PSpice simulations; UWB receivers; fourth-order Butterworth continuous-time leap-frog filter; frequency 240 MHz to 300 MHz; multiple loop feedback lowpass filter; output noise density; power 22.3 mW; power 55 mW; power consumption; power operational transconductance amplifier; size 0.18 mum; voltage 1.5 V; CMOS process; Cutoff frequency; Dynamic range; Energy consumption; Feedback loop; Low voltage; Nonlinear filters; Operational amplifiers; Power supplies; Transconductance;
Conference_Titel :
Norchip, 2007
Conference_Location :
Aalborg
Print_ISBN :
978-1-4244-1516-8
Electronic_ISBN :
978-1-4244-1517-5
DOI :
10.1109/NORCHP.2007.4481072
