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:
Jul. 06, 1999
Filed:
Jun. 23, 1997
Mauro Sali, S. Angelo Lodigiano, IT;
Corrado Villa, Sovico, IT;
Marcello Carrera, Trescore Balneario, IT;
STMicroelectronics, S.r.l., Agrate Brinza, IT;
Abstract
A negative word line voltage regulation circuit integratable in an electrically erasable semiconductor memory device. The circuit regulates a negative word line voltage to be supplied to word lines of the memory device during an electrical erasure of the memory device. The circuit includes an operational amplifier with a first input coupled to a reference voltage, a second input coupled to the negative word line voltage, and an output controlling a voltage regulation branch connected between an external power supply and the negative word line voltage, to provide a regulation current for regulating the negative word line voltage. The output of the operational amplifier also controls a voltage sensing branch, connected between the external power supply and the negative word line voltage, to provide a sensing signal coupled to the second input of the operational amplifier.