To provide a pressure sensor device with adjustable sensitivity of a plurality of pressure detection parts even if a common system and a common processing circuit chip are used.
A processing circuit chip comprises a plurality of resistance parts 38b and 38c equipped with a plurality of resistances 381a-386a, and a plurality of switches 381b-386b selectively carrying a current to one of the plurality of resistances 381a-386a by turning on or off the switch. The circuit chip is equipped with an addition reverse amplification circuit part 38 whose amplification factor is set according to the respective combined resistance values of the respective resistance parts 38b and 38c. In the circuit part 38, one of the switches 381b-386b is turned on or off to form circuits by any one of the resistances 381a-386a so that the resistance parts 38b and 38c respectively have desired combined resistance values. Desired amplification factors are set corresponding to the formed circuits.
| JP2002013995A | 2002-01-18 | |||
| JPH05248975A | 1993-09-28 |
Takahiro Miura
Fumihiro Mizuno