Patent ID: 11877864
Assignee: MEASUREMENT SPECIALTIES, INC.
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A pre-amplifier circuit for a pressure sensor system, the pre-amplifier circuit comprising:
a differential-output operational-amplifier having an inverting input, a noninverting input, and a differential output comprising a positive output and a negative output;
a first node coupled to the positive output of the differential-output operational-amplifier, where the first node is configured to connect to a first side of a first external pressure-sensitive element;
a second node coupled to the negative output of the differential-output operational-amplifier, where the second node is configured to connect to a first side of a second external pressure-sensitive element; and
a protection circuit including a plurality of resistors coupled between the first node and the inverting input of the differential-output operational-amplifier, and between the second node and the noninverting input of the differential-output operational-amplifier.