Universal CMOS current-mode analog function synthesizer

Author

Atti, Muhammad Taher Abuelma´

Author_Institution

King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia

Volume

49

Issue

10

fYear

2002

fDate

10/1/2002 12:00:00 AM

Firstpage

1468

Lastpage

1474

Abstract

A CMOS integratable current-mode analog function synthesizer circuit is presented. The proposed circuit is based on approximating the required function using the first three terms of its Taylor series expansion. These approximations can be implemented by adding the output currents of a weighted current square, a weighted current amplifier (or attenuator) and a constant current. The proposed circuit can simultaneously realize 18 different mathematical functions and can be easily expanded to accommodate others. SPICE simulation results demonstrating the circuit performance are included.

Keywords

CMOS analogue integrated circuits; current-mode circuits; function generators; nonlinear functions; nonlinear network analysis; nonlinear network synthesis; CMOS function synthesizer circuit; Taylor series expansion; current-mode analog function generator; mathematical functions; universal function synthesizer circuit; weighted current amplifier; weighted current square; CMOS analog integrated circuits; Circuit synthesis; Current mode circuits; Function approximation; MOSFETs; Operational amplifiers; Piecewise linear techniques; Signal synthesis; Synthesizers; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/TCSI.2002.803356

Filename

1039498