Patent ID: 11947734
Assignee: GOERTEK INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. The apparatus according to claim 1, wherein:
the at least one first sensor comprises a first Wheatstone-bridge circuit and a first amplifier circuit;
an arm of the first Wheatstone-bridge circuit comprises a first strain-sensitive element, and the first strain-sensitive element is attached to the deformable portion;
the first amplifier circuit comprises a first operational amplifier, an inverting input terminal and a non-inverting input terminal of the first operational amplifier are coupled to two output terminals, respectively, of the first Wheatstone-bridge circuit, and an output terminal of the first operational amplifier is coupled to an input terminal of the comparator; and
the first signal comprises a signal outputted from the output terminal of the first operational amplifier.