Logarithmic_current_source

Published:2009/7/17 3:57:00 Author:Jessie | From:SeekIC

This circuit uses both sections of an XR-13600 (Fig. 11-1B) to form a logarithmic current source. The current can be used for IB (the bias current) in many OTA applications by providing a logarithmic current output for a linear voltage in.For example, the circuit can be used to bias the stereo volume control (Fig. 11-2) to provide temperature-independent stereo attenuation characteristics. EXAP Corporation Databook 1990 p5- 258



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