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A CMOS multi-gain transconductance amplifier and its applications

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Abstract

Transconductance amplifier (gm) based circuits are attractive due to their inherent programmability features. Single output gm’s are often replaced by multi-output gm’s to reduce the number of active devices for a given application. However, this usually results in losing the circuit programmability features. This work shows that this problem can be circumvented through adopting a new programmable multi-gain gm. The advantages of the proposed multi-gain gm are demonstrated using two filter design examples. They show that the proposed multi-gain gm reduces the number of active devices by two-third compared with their single output gm based counterparts while maintaining their versatile programmability characteristics. Experimental results obtained from a 0.18 μm CMOS process for one of the applications are provided.

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Acknowledgements

The author would like to thank King Abdulaziz City for Science and Technology (KACST) for the financial support (Project No. AT-32-94).

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Authors and Affiliations

  1. Electrical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

    Hussain Alzaher

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  1. Hussain Alzaher
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Correspondence to Hussain Alzaher.

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Alzaher, H. A CMOS multi-gain transconductance amplifier and its applications. Analog Integr Circ Sig Process 95, 357–364 (2018). https://doi.org/10.1007/s10470-018-1178-5

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  • DOI: https://doi.org/10.1007/s10470-018-1178-5

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