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Chopper Modulators Using Current Conveyor Analogue Switches

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Abstract

The new CMOS Cowan, Ring, and Full-AM chopper modulators using current conveyor analogue switches are presented. The proposed chopper modulators use a square wave carrier current for controlling the transfer of a sine wave baseband voltage from nodes Y to nodes X, and the baseband currents from nodes X to nodes Z, of the current conveyors. The proposed chopper modulators are verified by simulating from the layout with a 0.5 μ m/level 49 MOSFET model of AMI obtained through MOSIS. With a supply voltage of ± 1.5 V, the operation range for the baseband voltage is between −300 mV and 300 mV. The operation range for the carrier current, bias currents for CCIIs, is ranged from ten to few hundred microamps. Using the carrier current of 20 μ A, the power consumption is not more than 0.8 mW in the operation range of the baseband voltage.

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Authors and Affiliations

  1. Department of Electronic Engineering, South-East Asia University, Nongkheam, Bangkok, 10160, Thailand

    Adisak Monpapassorn

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  1. Adisak Monpapassorn
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Correspondence to Adisak Monpapassorn.

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Monpapassorn, A. Chopper Modulators Using Current Conveyor Analogue Switches. Analog Integr Circ Sig Process 45, 155–162 (2005). https://doi.org/10.1007/s10470-005-4008-5

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  • DOI: https://doi.org/10.1007/s10470-005-4008-5

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