A CMOS Wideband Linear Current Attenuator with Electronically Variable Gain
نویسنده
چکیده
A~SZFUCZ In this paper 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. Then the circuit can be used as a four-quadrant current multiplier. The current attenuator was realized in a standard 2.5 pm CMOS process using channel lengths of 5 pm. The measured nonlinearity is less than 1 O/O over the entire input current range. Simulations indicate a feasible -3dB bandwidth of over 100 MHz.
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تاریخ انتشار 1993