Arabian Journal for Science and Engineering

, Volume 44, Issue 8, pp 6727–6740 | Cite as

A LP, Very High-CMRR, Wide-Bandwidth FDCCII-Based CMIA Adapted to Both Current and Voltage Inputs

  • S. Ahmadi
  • S. J. AzhariEmail author
Research Article - Electrical Engineering


This paper presents a novel current-mode instrumentation amplifier (CMIA) which is based on a fully differential second-generation current conveyor (FDCCII). This circuit is innovatively adapted to both types of input signals, thus becoming uniquely versatile. As another unique quality, neither does it need well-matched active blocks nor does it require matched resistors; but it can inherently improves common-mode rejection ratio (CMRR), bandwidth (BW), power and area consumption and hence becomes an excellent matchless choice for integration. Most favorably, its CMRR is enormously (100–105 dB) improved using a current subtracting stage. The proposed CMIA is designed using TSMC 0.18 um RF CMOS 2P6M Technology and supply voltages of ± 1 V. Its pre-layout and post-layout performances both plus Monte Carlo analysis are simulated using CADENCE. In pre-layout, it achieves voltage and current CMRR magnitude-BW of 224.9 dB–7.2 KH and 104 dB–0.94 KHz, respectively, differential voltage/current gain BW of 8.42 MHz/9.02 MHz, very low consumed power of 521.7 uW, output offset of 2.23 uV and area of 63.4 um \(\times \) 87 um. Exceptionally, post-layout plus Monte Carlo results are tightly close to pre-layout ones; altogether, it proves its well PVT insensitivity.


Current-mode instrumentation amplifier (CMIA) Fully differential second-generation current conveyor (FDCCII) High CMRR Wide bandwidth 


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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.Electronics DepartmentIran University of Science and TechnologyTehranIran
  2. 2.Electronics Department and Electronics Research CenterIran University of Science and TechnologyTehranIran

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