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:
Mar. 01, 2005
Filed:
Feb. 05, 2003
Jungwon Suh, Apex, NC (US);
Jungwon Suh, Apex, NC (US);
Infineon Technologies AG, Munich, DE;
Abstract
A voltage down converter for a semiconductor memory device to convert an external voltage to a lower value internal voltage for the device, has a voltage generator that produces a reference voltage corresponding to the value of the internal voltage, a comparator having opposite polarity inputs for producing an amplified output control signal, and a pull-up device operating from the external voltage that receives the control signal from the comparator to produce the internal voltage as an input. A dual source follower is located between the reference voltage generator and comparator and has two sections having cross-coupled inputs which respectively receive the internal reference voltage and the internal voltage to produce output voltages moving in opposite directions, each of which is applied to one input of the comparator, thereby translating the difference between Vintref and Vint to a level in a range that can be better amplified by the comparator.