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. 16, 1991
Filed:
Jul. 31, 1990
Applicant:
Inventors:
James Woo, Portland, OR (US);
Marvin E LaVoie, Aloha, OR (US);
Assignee:
Tektronix, Inc., Beaverton, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H / ;
U.S. Cl.
CPC ...
333 / ; 333103 ; 330 51 ;
Abstract
A high performance attenuator configuration divides a signal path into a plurality of parallel attenuator paths, each path having a predetermined attenuation value. A switch for each attenuator path is provided to couple selectively one of the attenuator paths to an input connector. Each attenuator path has an FET buffer amplifier, and the outputs of the FET buffer amplifiers are input to an electronic switch or multiplexer. The electronic switch selects the FET buffer amplifier output to be passed on to an output drive circuit.