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.

Date of Patent:
Mar. 24, 2015

Filed:

Apr. 22, 2010
Applicants:

Takao Kawahara, Tokyo, JP;

Takayuki Nakamura, Tokyo, JP;

Inventors:

Takao Kawahara, Tokyo, JP;

Takayuki Nakamura, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/20 (2006.01); G01R 31/28 (2006.01);
U.S. Cl.
CPC ...
G01R 31/2851 (2013.01); G01R 31/2841 (2013.01);
Abstract

A first switch is arranged such that a first terminal thereof is connected to an AC test unit and a second terminal thereof is connected to an I/O terminal and a DC test unit. A first switch is configured so as to be capable of switching states between a connection state in which the first terminal and the second terminal are connected to each other, and a disconnection state in which they are disconnected from each other. A bypass capacitor is arranged between the first terminal and the second terminal, and is configured to bypass the frequency component which is cut off by the first switch.


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