Electrical circuit, such as a wheatstone bridge is provided with a part of the adjustment of resistance.

摘要

Electrical circuit, such as a wheatstone bridge comprising resistors (7 to 10) connected by means of the widened portions of the track (11 to 14). The widened portions connected to a measuring apparatus (v) of high impedance comprise sections of variable resistor (17, 18). As the portions (12 and 14) essentially to widen these sections, no substantial current passes through the segments of chopped strands, the end of which has undergone a change of its chemical composition, which could otherwise disturb the stability of the circuit as a function of time. The measurements of very great accuracy is therefore possible. & br / an application relates to the pressure sensors subjected to strong variations of temperature and of the measurements are very long.