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:
Jul. 22, 2008
Filed:
Mar. 29, 2007
Ira G. Pollock, Hillsboro, OR (US);
William A. Hagerup, Portland, OR (US);
Paul G. Chastain, Portland, OR (US);
William Q. Law, Beaverton, OR (US);
Ira G. Pollock, Hillsboro, OR (US);
William A. Hagerup, Portland, OR (US);
Paul G. Chastain, Portland, OR (US);
William Q. Law, Beaverton, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A wide bandwidth attenuator input circuit for a measurement probe has a Zattenuator circuit coupled in series with a compensated RC attenuator circuit. The series attenuator elements of the Zand the compensated RC attenuator circuits are coupled via a controlled impedance transmission line to the shunt attenuator elements of the Zand the compensated RC attenuator circuits. The shunt element of the Zattenuator element terminates the transmission line in its characteristic impedance. The junction of the series and shunt attenuator elements are coupled to the input of a buffer amplifier. At low and intermediate frequencies, the compensated RC attenuator circuit attenuates an input signal while at high frequencies, the compensated RC attenuator circuit acts as a short and the Zattenuator circuits attenuates the input signal.