A CMOS Wideband Linear Current Attenuator with Electronically Variable Gain

Wiegerink, Remco J. (1993) A CMOS Wideband Linear Current Attenuator with Electronically Variable Gain. In: IEEE International Symposium on Circuits and Systems, ISCAS 1993, 3-6 May 1993, Chicago, IL, USA.

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Abstract:	A CMOS highly linear current attenuator is described. The circuit is suited for both differential and single input currents. The current gain is electronically variable between -1 and +1 by means of two controlling currents. A simple additional circuit is described to obtain a gain that is linearly dependent on a single control current. The circuit can be used as a four-quadrant current multiplier. The current attenuator is realized in a standard 2.5 μm CMOS process using channel lengths of 5 μm. The measured nonlinearity is less than 1% over the entire input current range. Simulations indicate a feasible -3dB bandwidth of over 100 MHz.
Item Type:	Conference or Workshop Item
Copyright:	©1993 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Transducers Science and Technology (TST)
Link to this item:	http://purl.utwente.nl/publications/15944
Official URL:	http://dx.doi.org/10.1109/ISCAS.1993.393883
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