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:
Jul. 15, 2014
Filed:
Jan. 19, 2012
Applicants:
Mingoo Seok, New York, NY (US);
Jing-fei Ren, Plano, TX (US);
Manish Goel, Plano, TX (US);
Inventors:
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/00 (2006.01); G06F 11/30 (2006.01); G06F 21/55 (2013.01); G06F 1/26 (2006.01);
U.S. Cl.
CPC ...
G06F 21/558 (2013.01); G06F 1/26 (2013.01);
Abstract
An embodiment of the invention provides a cryptographic device that draws a substantially constant current from an accessible electrical node that supplies power to the cryptographic device. Keeping the current drawn from the accessible electrical node substantially constant reduces the probability that secure information may be taken by unwanted third parties from the cryptographic device. The cryptographic device includes an active shunt current regulator, a low-pass filter, a linear voltage regulator and an AES (advanced encryption standard) circuit.