Patent ID: 9234768
Filing Date: 2016-01-12
CPC Classification: G01D,G01L

Claim Text:
1. A method for calibrating a sensor, the sensor having a Wheatstone bridge with one or more sense elements coupled to a reference voltage, an amplifier coupled to the Wheatstone bridge for providing a sensor output signal, a resistor and a series connected switch for connecting an adjustable power source output voltage to the sensor to induce an offset in the sensor output signal, the method comprising: activating the switch to connect the adjustable power source output voltage to the sensor via the switch and the resistor to induce an offset in the sensor output signal; reading a value of the sensor output signal; comparing the value of the sensor output signal with a predetermined value; adjusting the adjustable power source output voltage to a value that moves the value of the sensor output signal toward the predetermined value; and repeating the reading, comparing and adjusting steps until the value of the sensor output signal is within a predetermined range of the predetermined value.