The interface circuit having two input terminals and enabling to supply a circuit for the application and communicate with the latter .

摘要

The present invention relates to an interface circuit (50) intended to be connected to the one hand to a two-wire bus (58, 60), and secondly to a circuit (66). br / the interface circuit (50) includes a rectifier bridge double - alternation (d1, d2, d3, d4) serving to supply the circuit of the application (66), together with a supply capacitor (68). According to a preferred embodiment of the invention, the interface circuit further comprises a first switch (70) and a second switch (72) serving to define a voltage which is constantly determined between an external reference point (54) and a point of reference (62) to the circuit of application.