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. 11, 2003
Filed:
Nov. 08, 2001
Applicant:
Inventor:
Peicheng Ju, Berkeley Heights, NJ (US);
Assignee:
Agere Systems, Inc., Berkeley Heights, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 3/16 ;
U.S. Cl.
CPC ...
G05F 3/16 ;
Abstract
A bandgap reference circuit that uses reduced substrate area while requiring relatively low voltage. The circuit may include a bipolar transistor with a resistor electrically connected across the emitter-base of the bipolar transistor. The resistor sums a first current with a second current and also generates a fractional V . The bandgap reference circuit may have a first current proportional to V , and a second current proportional to a PTAT current. An impedance booster may be incorporated into the circuit. Also disclosed is a method of regulating a voltage level using embodiments of the bandgap reference circuit.