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:
May. 05, 1992
Filed:
Sep. 05, 1990
James Ward, Gilbert, AZ (US);
VLSI Technology, Inc., San Jose, CA (US);
Abstract
A CMOS drive circuit an integrated circuit bonding pad is controlled by a pre-driver signals to change the potential on the output pad in accordance with these signals. Undesirable interference (emi) problems are eliminated or significantly reduced by slowing the ramp of change of the signal appearing on the output bonding pad when it changes from a high or positive binary state to a lower, relatively negative binary state. This is effected by splitting the output NMOS transistor of the CMOS output driver into two parallel connected, relatively small-sized transistor. Each of these transistors is driven from the signal input terminal through a relatively low current source which causes the gate capacitance to be slowly charged.