Abstract: An integrated, programmable, feed forward current controller supplies a control current to control or compensate a drive current used to drive a device having a response that depends upon a physical parameter such as temperature. Control current compensation data are stored in a programmable look-up table as a function of the physical parameter. A transducer converts a measurement of the physical parameter into an electrical signal that is digitized and used to address the contents of the look-up table. The compensated control current stored in the look-up table is converted into an analog current and used to control or compensate a drive current used to drive the device under control, thereby minimizing the dependence of the device's response on the physical parameter.

Abstract: An integrated, programmable, feed forward current controller supplies a control current to control or compensate a drive current used to drive a device having a response that depends upon a physical parameter such as temperature. Control current compensation data are stored in a programmable look-up table as a function of the physical parameter. A transducer converts a measurement of the physical parameter into an electrical signal that is digitized and used to address the contents of the look-up table. The compensated control current stored in the look-up table is converted into an analog current and used to control or compensate a drive current used to drive the device under control, thereby minimizing the dependence of the device's response on the physical parameter.