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:
Apr. 09, 2019
Filed:
Jul. 07, 2017
Silicon Laboratories Inc., Austin, TX (US);
SILICON LABORATORIES INC., Austin, TX (US);
Abstract
An integrated circuit includes an energy detection circuit, a switching circuit, and a tamper response circuit. The integrated circuit has an input for receiving a radio frequency (RF) signal, a first output for providing a demodulated signal, and a second output for selectively providing a detect signal. The detect signal is provided in response to detecting that an energy of an internal signal exceeds a first threshold when the integrated circuit is in a secure mode. The switching circuit is used to alternatively switch the input of the energy detection circuit to an RF input terminal in a normal mode and to an internal antenna in a secure mode. The tamper response circuit disables a function of the integrated circuit in response to an activation of the detect signal in the secure mode.