Title :
CMOS differential pair transconductor with active-error feedback
Author :
Szczepanski, Stanislaw ; Slawomir, K. ; Schaumann, Rolf
Author_Institution :
Inst. of Telecommun., Tech. Univ. Gdansk, Poland
Abstract :
A linearization method based on the active-error feedback concept is presented for the design of highly linear, CMOS differential pair transconductor. The proposed circuit implementation combines a conventional source-coupled differential pair with a simple error amplifier in negative feedback path. As a result, improved linearity of the developed transconductor is obtained. SPICE simulations show that for 0.5μm HP AMOS14TB process (MOSIS) with a ±2.5V power supply, total harmonic distortion (THD) at 1.2VPP is less then 0.15% in comparison to 1.85% without linearization.
Keywords :
CMOS analogue integrated circuits; SPICE; differential amplifiers; feedback amplifiers; harmonic distortion; linearisation techniques; operational amplifiers; transfer functions; 2.5 V; CMOS differential pair transconductor; DC transfer function; SPICE simulations; active-error feedback; circuit implementation; highly linear transconductor; linearization method; negative feedback path; simple error amplifier; source-coupled differential pair; total harmonic distortion; Circuit topology; Differential equations; Feedback circuits; Informatics; Linearity; Output feedback; Transconductance; Transconductors; Transfer functions; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on
Print_ISBN :
0-7803-8163-7
DOI :
10.1109/ICECS.2003.1302003
