Semiconductor pressure sensor and data processing device

Details Semiconductor pressure sensor and data processing device Semiconductor pressure sensor and data processing device

2011-04-19

2011-04-19

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Electrical

C073S725000

Reexamination Certificate

active

07926352

ABSTRACT:
For example, to adjust an offset of a pressure sensor, there are provided an external resistor RE and an internal resistor circuit that is connected to both ends of RE and formed in a semiconductor chip such as a processor. The internal resistor circuit includes N pieces of internal resistors RI connected in series between both ends of RE, and (N+1) pieces of switches selecting one of voltages of respective nodes of the serial resistors and outputs the same as a signal. RE has a high absolute value precision of, e.g., several ten ohms to several hundred ohms, and RI has a high relative value precision of, e.g., several kilo-ohms. Therefore, an offset adjustment range is decided at a high absolute value precision mainly by RE, and with regard to the arrangement resolution, a high precision can be obtained along with the relative value precision of the RI.

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Fujikura Ltd., “FPN, FGN-6 Data Sheet” [on line], [searched on Nov. 19, 2007] Internet URL:www.fujikura.co.jp/00/sensor/jpn/j—pdf/j—fpngn.pdf, (Japanese and English versions).

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