Title :
Positive/negative floating resistor using OTAs
Author :
Petchmaneelumka, Wandee ; Julsereewong, Prasit ; Riewruja, Vanchai
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok
Abstract :
A method for realizing a floating resistor based on operational transconductance amplifiers (OTAs) is presented in this paper. The proposed design is composed of only OTAs without any external resistor. The magnitude of the obtained resistance is electronically varied by adjusting the external bias currents of OTAs. Both a positive and a negative resistance can be achieved in the same circuit. The proposed scheme provides the simple configuration and low cost. The circuit performances based on the use of the commercially available OTAs are confirmed by the experimental results.
Keywords :
operational amplifiers; resistors; OTA; external bias currents; negative floating resistor; negative resistance; operational transconductance amplifiers; positive floating resistor; positive resistance; Automatic control; Automation; Circuit simulation; Control systems; Costs; Electrical resistance measurement; Operational amplifiers; Resistors; Transconductance; Voltage; OTA; floating resistor; negative resistance; simulated resistance;
Conference_Titel :
Control, Automation and Systems, 2008. ICCAS 2008. International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-89-950038-9-3
Electronic_ISBN :
978-89-93215-01-4
DOI :
10.1109/ICCAS.2008.4694481
