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:
Jan. 09, 2018
Filed:
Mar. 28, 2017
Powerchip Technology Corporation, Hsinchu, TW;
Akihiro Hirota, Tokyo, JP;
Powerchip Technology Corporation, Hsinchu, TW;
Abstract
A semiconductor memory apparatus performs a selection in a normal readout/write-in mode and an automatic refreshing mode and includes a sense amplifier reading out data from a memory device, a first switching device connecting a first power supply voltage acting as an overdrive voltage to a first power supply intermediate node during a first period and then connecting a second power supply voltage acting as an array voltage to the first power supply intermediate node, a second switching device connecting the fourth power supply voltage to a second power supply intermediate node of the sense amplifier when the sense amplifier is driven, a first capacitor connected to the overdrive voltage and charging it, a third switching device switched on in the automatic refreshing mode, and a voltage generator generating a third power supply voltage and applying it and the first power supply voltage in parallel through the third switching device.