CDBA based current instrumentation amplifier

Priyanka Gupta, Kunal Gupta, Neeta Pandey, Rajeshwari Pandey


This paper presents a novel method to realize a current mode instrumentation amplifier (CMIA) through CDBA (Current difference Buffered Amplifier). It employs two CDBAs and two resistors to obtain desired functionality. Further, it does not require any resistor matching. The gain can be set according to the resistor values. It offers high differential gain and a bandwidth, which is independent of gain. The working of the circuit is verified through PSPICE simulations using CFOA IC based CDBA realization.


CDBA; CMIA; current gain; slew rate; parasitic capacitance.

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