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:
Aug. 23, 1994
Filed:
Nov. 06, 1992
Waleed S Almulla, Folsom, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
An input buffer capable of operating at a plurality of power supply levels. The input buffer of the present invention includes input logic that receives the data and has pull-up and pull-down devices that are coupled together in series as an inverter to generate a signal indicative of the data input. The input buffer also includes a mechanism for adjusting the strength of the pull-up and pull-down devices independent of each other so that the trip point and the propagation delay remain the same for the different power supply levels. This allows the input buffer to be CMOS and TTL compatible for all inputs. The input buffer also includes output logic which outputs the data in response to the signal from the input logic.