Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11023868 | Microelectronics Journal | 2018 | 23 Pages |
Abstract
In this paper a new active resistor is proposed which is suitable for tunable linear voltage to current converters. The proposed resistor is composed of the main and auxiliary triode-mode transistors in which the resistance of auxiliary transistor adds to that of main transistor at a specific tune voltage. By this way the triode operation of both transistors is ensured throughout the tuning range. The proposed resistor is used in a tunable linear transconductor. The proposed transconductor which is implemented in 0.13â¯Î¼m CMOS technology works with 1.2â¯V supply voltage and its power consumption changes between 682 and 980â¯Î¼W. Simulation results show 20â¯dB improvement in THD of transconductor thanks to using proposed resistor rather than conventional one for input voltage amplitude of 1Vpp at 1â¯MHz. The transconductance can be tuned from 68 to 177.4 μA/V and the THD remains less than â55â¯dB for input voltage amplitudes up to 1.2Vpp and for the entire tuning range.
Keywords
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Physical Sciences and Engineering
Computer Science
Hardware and Architecture
Authors
Farzan Rezaei,