A CMOS multi-gain transconductance amplifier and its applications |
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Authors: | Hussain Alzaher |
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Affiliation: | 1.Electrical Engineering Department,King Fahd University of Petroleum and Minerals,Dhahran,Saudi Arabia |
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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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