Title :
A low-voltage, low-power CMOS fifth-order elliptic GM-C filter for baseband mobile, wireless communication
Author :
Hung, Chung-Chih ; Halonen, Kari A I ; Ismail, Mohammed ; Porra, Veikko ; Hyogo, Akira
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
8/1/1997 12:00:00 AM
Abstract :
The design and performance of a rail-to-rail low-voltage CMOS fifth-order elliptic low-pass GM-C filter for baseband mobile communication are presented. The operational transconductance amplifier (OTA) used in this filter is a low-voltage rail-to-rail voltage-to-current converter (V-I converter). In this V-I converter, an N-type V-I converter cell is connected in parallel with its counterpart, a P-type V-I converter cell, to achieve common-mode (CM) rail-to-rail operation. Two maximum-current selecting circuits and an output current subtraction circuit are utilized to generate constant-gm output currents for this OTA. This fifth-order elliptic low-pass GM-C filter operates at a supply voltage of 3 V and has a cutoff frequency of 280 to 405 kHz. It provides up to 700 mVpp output with 1% total harmonic distortion (THD), dissipates 2.48 mW at Vcm=1.5 V, and occupies 1.62 mm2 in a 1.2-μm CMOS technology
Keywords :
CMOS analogue integrated circuits; VLSI; active filters; convertors; elliptic filters; land mobile radio; low-pass filters; operational amplifiers; transceivers; 1.2 micron; 1.5 V; 2.48 mW; 280 to 405 kHz; 3 V; CMOS technology; N-type V-I converter cell; P-type V-I converter cell; analog VLSI; baseband mobile wireless communication; common mode rail to rail operation; cutoff frequency; fifth order elliptic GM-C filter; low power CMOS IC; low voltage CMOS IC; low-pass GM-C filter performance; maximum current selecting circuits; operational transconductance amplifier; output current subtraction circuit; supply voltage; total harmonic distortion; transceiver; voltage to current converter; Baseband; CMOS technology; Circuits; Low pass filters; Mobile communication; Operational amplifiers; Rail to rail amplifiers; Rail to rail operation; Transconductance; Voltage;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
