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. 20, 2005
Filed:
Oct. 09, 2003
Davide Tesi, Ferney-Voltaire, IT;
Davide Tesi, Ferney-Voltaire, IT;
STMicroelectronics S.A., Montrouge, FR;
Abstract
A circuit for generating a reference voltage of bandgap type. The circuit includes a current mirror assembly of cascode type including, from a high supply rail, at least two parallel branches of P-channel MOS transistors. The circuit also includes a bipolar assembly in series with one of the branches of the mirror assembly down to a low supply rail, formed of two parallel branches each including, in series, a diode-connected bipolar transistor and, respectively, one resistor and two resistors. The circuit also includes a differential amplifier for balancing the currents in the two branches of the bipolar assembly, the reference voltage being provided by the terminal of interconnection of the mirror assembly with the bipolar assembly.