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. 17, 2012
Filed:
Oct. 14, 2009
Applicants:
Yasuyuki Arai, Tokyo, JP;
Shoji Kojima, Tokyo, JP;
Inventors:
Yasuyuki Arai, Tokyo, JP;
Shoji Kojima, Tokyo, JP;
Assignee:
Advantest Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 19/086 (2006.01);
U.S. Cl.
CPC ...
Abstract
A first current source supplies a tail current It to a plurality of differential pairs. A pre-driver outputs gate signals to the gates of transistors of the corresponding differential pair. A pre-driver is configured to switch the state between the enable state and the disable state. In the enable state, the pre-driver outputs the gate signals that correspond to the differential signals. In the disable state, the pre-driver outputs the gate signals having levels which instruct the transistors of the corresponding differential pair to switch off.