High frequency signal envelope capacity and capacity mean value measuring device, has differential amplifier with negative feedback paths which extend from outputs to inputs, and one of detector units provided in paths

摘要

The device has a detector (2) with a detector unit, where a differential amplifier (24), which is downstream of the detector, has inputs (52, 53) and outputs (54, 55). The differential amplifier has negative feedback paths (56, 57), which extend from the outputs to the inputs. Another detector unit is provided in the negative feedback paths. The two inputs are connected with the two outputs by the two negative feed back paths, respectively.