Patent ID: 7778784
Filing Date: 2010-08-17
Classification: G01D,G01F

Abstract:
1. Field-device electronics for a field device, said electronics being fed by an external, electric energy supply providing a supply voltage and delivering a variable supply current driven by said supply voltage, said field-device electronics comprising: an electric current controller for adjusting and/or modulating said supply current, said current controller being flowed-through by said supply current; an internal operating and evaluating circuit for controlling the field device; and an internal supply circuit feeding said internal operating and evaluating circuit, said internal supply lying at an internal input voltage of the field-device electronics derived from the supply voltage, and said internal supply circuit including a first voltage controller flowed-through, at least at times, by a first current component of the supply current for providing in the field-device electronics a first internal, useful voltage, a second voltage controller flowed-through, at least at times, by a second current component of the supply current for providing in the field-device electronics a second internal, useful voltage variable over a predeterminable voltage range, and a voltage stabilizer flowed-through, at least at times, by a third current component of the supply current for adjusting and maintaining said internal input voltage of the field-device electronics at a predeterminable voltage level; wherein the operating and evaluating circuit is flowed-through, at least at times, both by a first useful current driven by the first useful voltage and by a second useful current driven by the second useful voltage.