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:
Apr. 21, 1998
Filed:
Feb. 16, 1996
Marvin W Martinez, Jr, Plano, TX (US);
Cyrix Corporation, Richardson, TX (US);
Abstract
An input buffer circuit provides programmable resistors for inputs to a microprocessor and compensates for switching voltage timing differences caused when a selected programmable resistor is utilized for a selected input. In a preferred embodiment, an input buffer circuit has a weak transistor coupled between the input and an operating voltage source or ground, and a compensation circuit including two transistors in series between the operating voltage source or ground, and an output. When the weak transistor is on, thereby raising or lowering the input signal, one of the transistors is also on and the other transistor couples the output to the operating voltage source or ground.