Patent ID: 8614492

Claim:
A stress sensor integrated circuit for sensing a mechanical stress applied to an object, the stress sensor integrated circuit comprising: a constant current source; a first field effect transistor including a first source region electrically connected to the constant current source, a first drain region, one or more first nanowires extending from the first source region to the first drain region, and a first gate electrode extending circumferentially about the one or more first nanowires between the first source region and the first drain region, the one or more first nanowires configured to change in length in response to the mechanical stress transferred from the object; and a second field effect transistor includes a second source region electrically connected to the constant current source, a second drain region, one or more second nanowires extending from the second source region to the second drain region, and a second gate electrode extending circumferentially about the one or more second nanowires between the second source region and the second drain region, the one or more second nanowires configured to change in length in response to the mechanical stress transferred from the object, wherein the first and second field effect transistors are configured such that a first voltage output from the first drain region of the first field effect transistor is not equal to a second voltage output from the second drain region of the second field effect transistor.