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High frequency saturated CMOS floating resistor for fully-differential analogue signal processors

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3 Author(s)
Steyaert, M. ; Dept of Elektrotechniek, Katholieke Univ. Leuven, Belgium ; Silva-Martinez, J. ; Sansen, W.

A floating resistor on a current source technique is introduced. All the transistors are saturated leading to higher frequency response than previously proposed techniques. Simulated results, using HSPICE level 3, for a 214 k Omega floating resistor have shown a -3 dB frequency of the order of 1 GHz. Its total harmonic distortion at 10.7 MHz and including 2% worst case transistor mismatches is less than -62 dB for fully differential applied signals up to 2 V peak to peak.

Published in:

Electronics Letters  (Volume:27 ,  Issue: 18 )