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:
Mar. 09, 1993
Filed:
Jun. 28, 1991
Applicant:
Inventor:
William C Martin, Carrollton, TX (US);
Assignee:
VLSI Technology, Inc., Sa Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307468 ; 307270 ; 307469 ; 307443 ;
Abstract
Circuitry within a device provides an output signal to an output pad of the device. One of a plurality of current levels is selected. When a first current level is selected, the circuitry generates only a first amount of current to maintain the output signal on the output pad. When a second current level is selected, the circuitry, in addition to the first amount of current, generates a second amount of current to maintain the output signal on the output pad. The first current level may be used in a test mode. In this way high current switching noise can be eliminated during testing. The second current level may then be used in a normal operating mode.