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Current-controlled linear MOS earthed and floating resistors and their application

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1 Author(s)
Wang, Z. ; Dept. of Electr. Eng., Swiss Federal Inst. of Technol., Zurich, Switzerland

A current-controlled linear MOS earthed resistor that requires only three transistors is realised by means of a new linearisation technique. A nonlinearity within ±1.5% full scale in the 0-4 V voltage range for a 5 V supply is experimentally achieved with discrete MOS devices. However, much higher linearity can be expected if the ratio of two transistor sizes are chosen exactly, according to the derivation. A floating resistor, derived from the earthed one, is also presented

Published in:

Circuits, Devices and Systems, IEE Proceedings G  (Volume:137 ,  Issue: 6 )