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http://dx.doi.org/10.5573/ieek.2013.50.12.080

Design of a Novel Instrumentation Amplifier using Current-conveyor(CCII)  

CHA, Hyeong-Woo (Department of Electronics Eng., Cheongju University)
Jeong, Tae-Yun (Department of Electronics Eng., Cheongju University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.12, 2013 , pp. 80-87 More about this Journal
Abstract
A novel instrumentation amplifier(IA) using positive polarity current-conveyor(CCII+) for electronic measurement systems with low cost, wideband, and gain control with wide range is designed. The IA consists of two CCII+, three resistor, and an operational amplifier(op-amp). The principal of the operating is that the difference of two input voltages applied into two CCII+ used voltage and current follower converts into same currents, and then these current drive resistor of (+) terminal and feedback resistor of op-amp to obtain output voltage. To verify operating principal of the IA, we designed the CCII+ and used commercial op-amp LF356. Simulation results show that voltage follower used CCII+ has offset voltage of 0.21mV at linear range of ${\pm}$4V. The IA had wide gain range from -20dB to 60dB by variation of only one resistor and -3dB frequency for the gain of 60dB was 400kHz. The IA also has merits without matching of external resistor and controllable offset voltage using the other resistor. The power dissipation of the IA is 130mW at supply voltage of ${\pm}$5V.
Keywords
current conveyor; instrumentation amplifier; analog circuit; sensor signal processing; op-amp;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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