Patent ID: 7411375
Filing Date: 2008-08-12
Classification: G05F

Abstract:
1. An apparatus for the output of at least one electrical output signal (Iout), wherein the desired electrical current level of the output signal (Iout) is predeterminable, comprising: at least one measuring resistor, at which the electrical current level of the output signal (Iout) is measurable; at least one adjuster, via which the electrical current level of the output signal (Iout) is settable; at least one controller, which compares the electrical current level of the output signal (Iout) measured at said at least one measuring resistor with the electrical current level desired for the output signal (Iout), and which controls the electrical current level of the output signal (Iout) via said at least one adjuster; at least one microprocessor, which provides a digital desired value (Ddes) for the electrical current level of the output signal (Iout): at least one digital/analog converter which lies at the base potential of (VGND) and which converts the digital desired value (Ddes) of said at least one microprocessor, or a signal (Ddes*) independent thereon, into an analog value (Vdes); said at least one microprocessor lies at a reference potential other than that of said at least one controller and said at least one digital/analog converter; and at least one level converter, which adapts the level of said digital/analog converter, wherein: at least one signal output is provided for issuing the output signal (Iout) to a load resistor; said controller and said measuring resistor are connected with a base-potential (VGND), which changes with said electrical current level of said output signal (Iout) and with the value of the load resistor; the base-potential (VGND) is a reference potential for said controller, said adjuster comprises an electrical component having an adjustable electrical resistance; a connection of said at least one controller for the reference potential (VGND) is connected with a point between said at least one measuring resistor and said at least one adjuster: and said at least one level converter adapts the digital output signals of said at least one microprocessor to the level of said digital/analog converter.