Title :
A power optimized transconductance amplifier and its application to a 6th order lowpass GmC filter
Author :
Po, F. Chan Wai ; De Foucauld, E. ; Morche, D. ; Vincent, P. ; Molin, R. Dal ; Pons, P. ; Pierquin, R. ; Kerherve, Eric
Author_Institution :
LETI, MINATEC, Grenoble, France
Abstract :
We present the design of an ultra low power sixth-order Butterworth low pass GmC filter in 0.13 ¿m CMOS process. A method to optimize the power consumption of a fully differential telescopic OTA is also presented to achieve an input linearity of 220 mVpp and transconductance value of 6 ¿S. The OTA is then used to implement an ultra low power filter and to show the impact of parasitic capacitances and resistances on the system. Simulation results shows that the frequency response of the sixth order Butterworth low pass filter is achieved with high precision and a THD of -60 dB for 200 mVpp input signal is obtained. The overall power consumption is less than 150 ¿W.
Keywords :
Butterworth filters; CMOS integrated circuits; capacitance; electric resistance; frequency response; low-pass filters; operational amplifiers; power amplifiers; power filters; CMOS process; frequency response; fully differential telescopic OTA; input linearity; operational transconductance amplifier; parasitic capacitance; power consumption; power optimized transconductance amplifier; resistance; size 0.13 mum; ultra low power sixth-order Butterworth low pass GmC filter; voltage 220 mV; CMOS process; Energy consumption; Frequency response; Linearity; Low pass filters; Optimization methods; Parasitic capacitance; Power amplifiers; Power filters; Transconductance;
Conference_Titel :
Electronics, Circuits, and Systems, 2009. ICECS 2009. 16th IEEE International Conference on
Conference_Location :
Yasmine Hammamet
Print_ISBN :
978-1-4244-5090-9
Electronic_ISBN :
978-1-4244-5091-6
DOI :
10.1109/ICECS.2009.5410858
