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Low supply voltage high-performance CMOS current mirror with low input and output voltage requirements

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3 Author(s)
J. Ramirez-Angulo ; Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA ; R. G. Carvajal ; A. Torralba

This paper presents a scheme for the efficient implementation of a low supply voltage continuous-time high-performance CMOS current mirror with low input and output voltage requirements. This circuit combines a shunt input feedback and a regulated cascode output stage to achieve low input resistance and very high output resistance. It can be used as a high-precision current mirror in analog and mixed signal circuits with a power supply close to a transistor's threshold voltage. The proposed current mirror has been simulated and a bandwidth of 40 MHz has been obtained. An experimental chip prototype has been sent for fabrication and has been experimentally verified, obtaining 0.15-V input-output voltage requirements, 100-Ω input resistance, and more than 200-MΩ (GΩ ideally) output resistance with a 1.2-V supply in a standard CMOS technology.

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IEEE Transactions on Circuits and Systems II: Express Briefs  (Volume:51 ,  Issue: 3 )