Title :
A linear transconductor and its application in an analog filter in 120nm CMOS
Author :
Kolm, Robert ; Zimmermann, Horst
Author_Institution :
Inst. of Electr. Measurements & Circuit Design, Vienna Univ. of Technol.
Abstract :
A gmC-filter in 120nm CMOS with a digital programmable gain and cut-off-frequency is presented. For this application a technique to enhance the linearity of a fully differential operational transconductance amplifier (OTA) is proposed. A filter of 3rd order with a cut-off-frequency between 235MHz and 285 MHz and a gain between 0dB and 5dB is implemented. The third harmonic distortion of this filter is -43dB for a 400mV peak-to-peak differential output signal for minimum gain and -48dB for maximum gain
Keywords :
CMOS analogue integrated circuits; continuous time filters; differential amplifiers; harmonic distortion; operational amplifiers; 0 to 5 dB; 120 nm; 235 to 285 MHz; 400 mV; CMOS process; analog filter; differential operational transconductance amplifier; linear transconductor; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS technology; Digital filters; Harmonic distortion; Linearity; Nonlinear filters; Resistors; Transconductors; Voltage;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693213
