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:
Nov. 04, 1997
Filed:
Nov. 14, 1995
Heng-Sheng Huang, Taipei, TW;
Kun-Luh Chen, Hsinchu, TW;
United Microelectronics Corporation, Taipei, TW;
Abstract
A data sensing apparatus particularly useful for sensing a ROM device. The apparatus can be used with various voltage level devices because it has an adjustable load. A first load element is connected to the voltage source applied to the ROM device. A second load element is connected in parallel with the first load element. A switching element is connected to the first load element and provides a path for a sensing current of the ROM device. An inverter, responsive to the sensing current, controls the switching element. An amplifier, connected to the switching element, provides a useful output indicative of the sensing current of the ROM device. A voltage level detector detects the voltage level of the voltage source. It disables the second load element so as to increase the load when the voltage level of the voltage source is higher than a predetermined value.