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:
Sep. 30, 2008
Filed:
Jan. 05, 2005
William H. Owen, Los Altos Hills, CA (US);
William H. Owen, Los Altos Hills, CA (US);
Intersil Americas, Inc., Milpitas, CA (US);
Abstract
A system and method is provided for improving the accuracy of the voltage reference output of a floating gate voltage reference circuit by minimizing the temperature coefficient, Tc. The system and method provides a minimized Tc on output reference voltage, for a wide variety of such output voltages. In a dual floating gate voltage reference circuit wherein a voltage reference output (Vref) is generated as a function of the difference in charge of said floating gates, a method includes causing each of the floating gates to change voltage substantially the same amount as a function of temperature such that, during a read mode of the reference circuit, the temperature coefficient, Tc, of the voltage reference output is substantially reduced. The system and method achieves very low Tc over a wide range of reference or comparator voltages using low cost analog test equipment and methods.