Patent ID: 9500728
Filing Date: 2016-11-22
CPC Classification: G01F,G01N,G01R

Claim Text:
1. A signal analyzer, comprising: a power signal line in a power signal path for the transmission of electrical signals; a decoupling circuit that decouples a first signal characterizing an excitation signal occurring in a load and that decouples a second signal characterizing a part of the excitation signal reflected at the load; a first attenuator; a second attenuator; a detector that determines the ratio of a magnitude of the first signal to a magnitude of the second signal and that determines a phase difference between the first signal and the second signal, wherein: the decoupling circuit includes a first transformer and a second transformer; the first transformer includes a primary side having a primary-side input and a primary-side output; the first transformer includes a secondary side having a secondary-side input and a secondary-side output; the second transformer includes a primary side having a primary-side input and a primary-side output; the second transformer includes a secondary side with a secondary-side input and a secondary-side output; the voltage on the primary-side input of the first transformer with respect to the primary-side output of the first transformer is in phase with the voltage at the secondary-side input of the first transformer with respect to the secondary-side output of the first transformer; the voltage on the primary-side input of the second transformer with respect to the primary-side output of the second transformer is in phase with the voltage at the secondary-side input of the second transformer with respect to the secondary-side output of the second transformer; the primary-side input of the first transformer is connected to the power signal line; the primary-side output of the first transformer is connected to a reference potential; the primary-side input and the primary-side output of the second transformer are connected to the power signal line; the current flowing through the power signal line flows through the primary side of the second transformer; the secondary-side input of the second transformer is connected to the reference potential; the secondary-side output of the second transformer is connected to the secondary-side input of the first transformer; the first signal is applied to the secondary-side output of the first transformer; and the second signal is applied to the connection of the secondary-side input of the first transformer and the secondary-side output of the second transformer.