The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2017
Filed:
Oct. 14, 2013
National Instruments Ireland Resources Limited, Dublin, IE;
Marc Vanden Bossche, Bornem, BE;
NATIONAL INSTRUMENTS IRELAND RESOURCES LIMITED, Dublin, IE;
Abstract
An impedance control device for tuning a device under test comprising: a first terminal port arranged for connecting a device under test, a second terminal port arranged for connecting a termination, a first signal path for a signal travelling between the first and the second terminal port, first coupling means arranged for picking up a part of the signal travelling in the first signal path, a second signal path arranged for receiving the part of the signal from the first coupling means, said second signal path comprising a correction circuit for adapting as a function of frequency the amplitude and phase of the received part of the signal, second coupling means arranged for coupling back into the first signal path an adapted signal outputted by the correction circuit, and an attenuator and phase shifter for applying attenuation and phase shifting on the signals travelling between the first and the second terminal port.