Patent ID: 9083372
Filing Date: 2015-07-14
Classification: H03M

Abstract:
1. A method of controlling an analog-to-digital (A/D) converter in a process variable transmitter that converts an analog input signal indicative of an industrial process variable to a digital output signal, the method comprising: receiving the analog input signal indicative of the industrial process variable; performing a first measurement measuring a signal level of the analog input signal using the A/D converter, wherein a resolution of the A/D converter changes as the measured signal level of the analog input signal varies; introducing a signal offset into the signal level of the analog input signal to move the measured signal level to increase the resolution of the A/D converter; performing a second measurement measuring the signal level of the analog input signal with the offset; converting the analog input signal, measured using the second measurement, to the digital output signal; and sending information, using the converted signal, related to the industrial process variable over a transmission connection.