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- W2104985998 abstract "A new CMOS current source is described for biomedical implantable microstimulator applications, which utilizes MOS transistors in deep triode region as linearized voltage controlled resistors (VCR). The VCR current source achieves large voltage compliance, up to 97% of the supply voltage, while maintaining high output impedance in the 100 M/spl Omega/ range to keep the stimulus current constant within 1% of the desired value irrespective of the site and tissue impedances. This approach improves stimulation efficiency, extends power supply lifetime, and saves chip area especially when the stimulation current level is high in the milliampere range. A prototype 4-channel microstimulator chip is fabricated in the AMI 1.5-/spl mu/m, 2-metal, 2-poly, n-well standard CMOS process. With a 5-V supply, each stimulating site driver provides at least 4.25-V compliance and >10 M/spl Omega/ output impedance, while sinking up to 210 /spl mu/A, and occupies 0.05 mm/sup 2/ in chip area. A modular 32-site wireless neural stimulation microsystem, utilizing the VCR current source, is under development." @default.
- W2104985998 created "2016-06-24" @default.
- W2104985998 creator A5030810852 @default.
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- W2104985998 date "2005-01-01" @default.
- W2104985998 modified "2023-09-24" @default.
- W2104985998 title "A Compact Large Voltage-Compliance High Output-Impedance Programmable Current Source for Implantable Microstimulators" @default.
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- W2104985998 doi "https://doi.org/10.1109/tbme.2004.839797" @default.
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