Title :
On the optimal choice of the output stage in CMOS transconductors
Author :
Lopez-Martin, Antonio J. ; Carvajal, R.G. ; Ramirez-Angulo, Jaime
Author_Institution :
Dept. Electr. & Electron. Eng., Public Univ. of Navarra, Pamplona, Spain
Abstract :
The optimal choice of output stages in CMOS transconductors in the presence of nonideal effects is analyzed. It is shown that current folding employing source-coupled differential pairs is advantageous versus the conventional approach based on current mirrors. Two versions of a CMOS transconductor, each one using one of the mentioned approaches, have been fabricated in a 0.5μm CMOS technology and tested. Measurement results confirm the linearity improvements of current folding at the output stage.
Keywords :
CMOS integrated circuits; circuit testing; conductors (electric); CMOS technology; CMOS transconductors; mirrors; size 0.5 mum; source-coupled differential pairs; CMOS integrated circuits; Harmonic distortion; Linearity; Mirrors; Resistance; Resistors; Transistors; CMOS Transconductor; Current Folding; Current Follower; Current Mirror;
Conference_Titel :
Communications and Information Technologies (ISCIT), 2013 13th International Symposium on
Conference_Location :
Surat Thani
Print_ISBN :
978-1-4673-5578-0
DOI :
10.1109/ISCIT.2013.6645878
