Voltage_controlled_resistor

Published:2009/7/17 3:05:00 Author:Jessie | From:SeekIC

This circuit uses one section of an XR-13600 (Fig. 11-1B) as a single-ended voltage-controlled resistor. A signal applied at RX generates an input to the XR-13600, which is then multiplied by the gm of the amplifier to produce an output current. The resulting resistor or RX = (R + RA)/(gm RA), where gm 19.2 IB at 25℃. Notice that the attenuation of VO by R and RA is necessary to maintain the input within the linear range of the XR-13600 input. EXAP corporation Dalabook 1990 p 5 25



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