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:
Nov. 07, 2000
Filed:
Feb. 29, 2000
David Rodriguez, Phoenix, AZ (US);
Richard S Griffith, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A power cut detection and recovery system (36) provides for the recovery of an electronic apparatus (20) in response to a momentary interruption in the voltage level of a power supply (46) coupled to that apparatus. The system includes a level detecting circuit (80) coupled to the power supply (46) for monitoring the voltage supplied to the apparatus (20). The system further includes internal reference supply circuits (86) that provide voltage and current references to operate the apparatus (20). A power cut monitor and reference control circuit (84) is coupled to the level detecting circuit (80) and is capable of causing the internal reference supply circuits (86) to remain enabled upon the detection of a momentary cut in the externally supplied power (46). A second level detecting circuit (90), dependent on the internal reference supply circuits (86), and the power cut monitor and reference control circuit (84) are coupled to an under voltage monitor and recovery circuit (88) that can cause the apparatus (20) to restart upon the recovery of the voltage level to a value above a predetermined level. By maintaining the internal reference supply circuits (86) in an enabled state, the apparatus (20) is able to restart in its pre-interruption state if the voltage level remains above a POR level.