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:
May. 27, 2003
Filed:
May. 30, 1995
John Jerome Janssen, Round Lake Beach, IL (US);
Alexander Wayne Hietala, Cary, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A portable radio communication device ( ) includes power control circuitry ( ) for monitoring the voltage level incoming from a battery ( ), and provides power to the rest of the radio communication device ( ). The power control circuitry ( ) includes a boost regulator ( ) that is used to generate an internal reference signal for use throughout the radio communication device including an analog to digital converter (ADC) for digitizing the battery voltage for use by the power control circuitry ( ). The power control circuitry ( ) compares the digitized battery voltage to thresholds to control power to the remainder of the radio communication device ( ). Additionally, a secondary comparator ( ) is provided to prevent damage to the battery and radio communication device circuitry. The secondary comparator uses multiple undervoltage thresholds depending upon the power state of the radio communication device ( ).