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. 18, 2003
Filed:
Dec. 04, 2001
Joseph D. Wert, Arlington, TX (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A system for generating a reference voltage is provided that includes a first p-type, thick-gate transistor, a second p-type, thick-gate transistor, a third p-type, thick-gate transistor, and a fourth p-type, thick-gate transistor. The first p-type transistor has a source that is coupled to an external power supply, a gate, and a drain that is coupled to the gate. The second p-type transistor has a source that is coupled to the drain of the first p-type transistor, a gate, and a drain that is coupled to the gate. The third p-type transistor has a source that is coupled to the drain of the second p-type transistor, a gate that is operable to receive a mode indicator, and a drain that is coupled to ground. The fourth p-type transistor has a source that is coupled to the drain of the second p-type transistor, a gate that is operable to receive an inverted mode indicator, and a drain that is coupled to ground.