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:
Feb. 15, 2005
Filed:
May. 01, 2002
James W. Frame, Highland Park, IL (US);
Richard W. Chrusciel, Belmont, MA (US);
James W. Frame, Highland Park, IL (US);
Richard W. Chrusciel, Belmont, MA (US);
Advantest Corp., Tokyo, JP;
Abstract
A comparator circuit for use in a semiconductor test system for comparing differential output signals of a semiconductor device under test (DUT). The comparator circuit is formed of a first pair of comparators having a DC comparator and an AC comparator which receives a first differential signal, a second pair of comparators having a DC comparator and an AC comparator which receives a second differential signal, a first latch for latching output of the first pair of comparators, a second latch for latching output of the second pair of comparators, and first and second serial-parallel converters for converting output signals of the first and second latches into parallel signals. The comparator circuit is formed of discrete components on a dielectric substrate.