Patent ID: 9557230
Date: 2017-01-31
CPC Classifications: G01L

Claim:
1. A pressure transducer comprising: a deflecting membrane, said membrane comprising at least two piezoresistors of different types, said piezoresistors being arranged such that (i) a same stress or a same strain, in both magnitude and sign, is applied on said piezoresistors, and (ii) said piezoresistors yield changes in resistance, wherein a piezoresistor of a first type is positioned such that its current direction is perpendicular to the stress direction and a piezoresistor of a second type is positioned such that its current direction is parallel to the stress direction, such that when a tensile stress is applied to the transducer, said piezoresistor of the first type increases its resistance and said piezoresistor of the second type decreases its resistance, or said piezoresistor of the first type decreases its resistance and said piezoresistor of the second type increases its resistance.