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:
Jun. 27, 2000
Filed:
Dec. 30, 1998
Jong-hyoung Lim, Kyungki-do, KR;
Sang-suk Kang, Kyungki-do, KR;
Abstract
Integrated circuit devices include preferred mode selection circuits therein which generate a signal that designates a first mode of the integrated circuit device when a potential of a first control signal is within a first range and a potential of a power supply signal (e.g., Vcc) is within a second range at the same time. The mode selection circuit also prevents changes in the potential of the first control signal from disabling the first mode when the potential of the power supply signal is not within the second range. When the integrated circuit device is a memory device, the first control signal may be a row or column address signal (Ai), for example. The mode selection circuit may comprise a level shifter which generates a downward level shifted version of the address signal. The mode selection circuit generates a signal that designates a first mode of the memory device when a potential of the address signal exceeds a first threshold (e.g., 5 volts) and a potential of the power supply signal (Vcc) is below a second threshold at the same time. The mode selection circuit also prevents changes in the potential of the address signal (Ai) from disabling the first mode so long as a potential of the power supply signal (Vcc) exceeds the second threshold.