Patent ID: 8835779
Filing Date: 2014-09-16
Classification: G01L

Abstract:
1. A method of performing ratiometric measurement, the method comprising: receiving a supply voltage signal; supplying the received supply voltage signal directly to operate a transducer having a signal gain from an input to an output, the signal gain being substantially proportional to the supply voltage, and wherein the transducer is a load-cell; supplying the received supply voltage directly to a compensation circuit; generating from the compensation circuit an offset signal and a reference signal; coupling an output of the transducer to an input of an amplifier; coupling the output of the amplifier to an input of an analog-to-digital converter (ADC); coupling the reference signal to the ADC, the reference signal making a dynamic range of the ADC substantially proportional to a dynamic range of the transducer; and coupling the offset signal to the amplifier, the offset signal centering the dynamic range of the output of the amplifier within a dynamic range of the input of the ADC.