Patent ID: 9331684
Filing Date: 2016-05-03
CPC Classification: G01D,G01K,G01L,H03K

Claim Text:
1. A semiconductor device for sensing a physical quantity, the semiconductor device including a first sensor element generating an electric signal corresponding to a detected value of the physical quantity and a nonvolatile main memory circuit storing a trimming data for adjusting an output characteristic of the first sensor element during a writing operation, and for adjusting the output characteristic of the first sensor element based on the trimming data, wherein the semiconductor device further includes: an input terminal that receives an input signal at a specified voltage; a second sensor element that generates an electric signal corresponding to a detected temperature; a comparator circuit that compares the specified voltage applied to the input terminal and a predetermined reference voltage, and that delivers a control signal for controlling writing operations into the main memory circuit based on the comparison result; a first switch; and a first changeover circuit that changes-over ON and OFF of the first switch for selectively connecting the input terminal and the second sensor element according to the control signal; wherein the input terminal also serves as an output terminal to deliver externally an electric signal generated by the second sensor element when the first changeover circuit changes the first switch to an ON state and connects the input terminal and the second sensor element.