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. 02, 2011
Filed:
Dec. 30, 2008
Yoon-jae Shin, Gyeonggi-do, KR;
Yoon-Jae Shin, Gyeonggi-do, KR;
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Abstract
A power-up signal generating circuit includes a detecting unit configured to output a bias signal having a voltage level corresponding to an external power voltage in response to an internal voltage and a deep power down (DPD) signal; and a signal generating unit configured to generate a power-up signal having a logic level corresponding to the voltage level of the external power voltage in response to the DPD signal and the bias signal, wherein the internal voltage increases during an activation time of the power-up signal to reach a predetermined voltage level after a predetermined time, and maintains a ground voltage level during an inactivation period of the power-up signal.