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. 19, 2016
Filed:
Oct. 09, 2014
Qualcomm Switch Corp., San Diego, CA (US);
Perry Lou, Carlsbad, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
Various methods and devices that involve power-on-reset (POR) circuits are disclosed herein. An exemplary POR circuit for generating a POR signal upon detecting that a supply voltage has reached a desired level comprises a sense circuit and a delayed buffer. The sense circuit comprises: (i) an inverter powered by a known bias voltage; (ii) a feedback circuit powered by the supply voltage; and (iii) an output node of the sense circuit that experiences a voltage transition when the supply voltage has reached the desired level. The delayed buffer is coupled to the output node of the sense circuit that generates the POR signal in response to the voltage transition. The feedback circuit shuts off the sense circuit in response to the voltage transition. The POR circuit generates the POR signal for a local system. The known bias voltage is provided by an external system.