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:
Mar. 12, 2001
Richard Forsyth, Graz, AT;
Austria Mikro Systeme International Aktiengesellschaft, Unterpremstäten, AT;
Abstract
In a method for obtaining a temperature-independent voltage reference by an energy gap reference circuit using at least one bipolar transistor and a voltage source, only a single bipolar transistor is connected in series with a resistor. Different voltages are facultatively applied to the resistor. The voltages are detected upstream and downstream of the series resistor and fed to an A/D converter. The gain constant of the A/D converter is calculated from the digitalized measurements and used for measurement correction. The circuit arrangement for obtaining such a temperature-independent voltage reference includes a bipolar transistor and a resistor connected in series with the transistor. An A/D converter configured to yield digitalized voltage measurements is connected via switches to ports provided on either side of the resistor. The digital signals from the A/D converter are fed to a computer to determine the gain constant, from which the corrected voltage signal can be read out digitally.