Two-mode CMOS square-rooting circuits
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Abstract
Two square-rooting circuits based on negative feedback technique are proposed. The first circuit gives two output voltage signals proportional to the square root of input current, and the second circuit gives the output current signal proportional to the square root of input current. Moreover, all CMOS transistor of both circuits can work in both saturation region at the used supply voltage of 3VT and subthreshold at the used supply voltage of VT. Simulation results by Spice program agree well with theoretical anticipation.
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References
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