Importance

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Abstract

An electronic circuit for demodulating a carrier signal, for modulating a wanted signal and for supplying a consumer with power. The carrier signal is an alternating signal having a positive half-wave and a negative half-wave, comprising: a galvanically isolating, especially an inductive, interface with a first contact and a second contact, wherein the carrier signal is applied to the interface; a bridge rectifier having a first diode, second diode, third diode and fourth diode connected to the interface. The first diode and the second diode are conducting in the case of a positive half-wave, wherein the first contact of the interface is connected with the anode of the first diode, wherein the third diode and the fourth diode are conducting in the case of a negative half-wave, and wherein the second contact of the interface is connected with the anode of the third diode; a supply circuit, which is connected to the cathode of the first diode. A demodulation circuit is provided, which is connected to the cathode of the third diode; a modulation circuit, which is connected with the first contact; and the consumer, wherein the output of the demodulation circuit and the output of the supply circuit are connected with the consumer. The invention relates further to a field device comprising at least one such circuit as well as to a method.

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First Claim