Patent ID: 8542057
Filing Date: 2013-09-24
Classification: G01K,H03M

Abstract:
1. A circuit arrangement for an iterative temperature measurement, comprising: a first input for connecting a temperature-sensitive element that produces a measurement voltage dependent on a temperature; a comparator with a first input, which is connected to the first input for connecting the temperature-sensitive element and receives the measurement voltage, a second input for feeding a reference voltage, and an output that is connected to a sequential logic unit, the sequential logic unit having a first output and a second output; and a digitally controllable switching element for iteratively providing a superposition signal that is connected to the first output of the sequential logic unit and is coupled to the first input of the comparator, the digitally controllable switching element comprising a digital-analog converter, wherein each iteration of the superposition signal produces a successive approximation of the temperature that involves converging the measurement voltage toward the reference voltage.