Patent ID: 7825839
Filing Date: 2010-11-02
Classification: G01R

Abstract:
1. A measuring device for measuring the power of a high-frequency signal comprising: a detector for detecting the high-frequency signal and for generating an analog detector signal, an analog/digital converter for generating a digital signal, a chopper disposed between the detector and the analog/digital converter, the chopper configured to periodically chop the analog detector signal with a chopper signal, an evaluation device for evaluating the digital signal, a synchronous demodulator, which operates synchronously to the chopper, is disposed between the analog/digital converter and the evaluation device, wherein the dither supply device supplies the dither signal synchronously with the chopper signal, the dither signal is a sectionally-constant signal, and the time, during which the dither signal is constant, corresponds to the period of the chopper signal or is an integer multiple thereof, and wherein the detector, chopper, analog/digital converter, synchronous demodulator and evaluation device are coupled in a single branch.