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:
Jun. 23, 2009
Filed:
Jan. 31, 2008
Min-jon Lee, Taoyuan Shien, TW;
Min-Jon Lee, Taoyuan Shien, TW;
Delta Electronics, Inc., Taoyuan Shien, TW;
Abstract
An Inverter system includes a comparator unit compares an analog input voltage with at least one voltage threshold to judge a voltage range for the input voltage. A DC-offset unit determines a DC-offset value to limit the input voltage within a predetermined bound. The input voltage is level-shifted and amplified by a non-inverting adder unit according to the DC-offset value and a fixed gain, and then processed by an analog to digital converter (ADC) to obtain a digital count value. A microcontroller unit calculates an original value for the input analog voltage according to the voltage range and the digital count value. When the analog input voltage could be negative value, a full-wave rectifier unit and a polarity judgment unit are used to find an absolute value and a polarity of the analog input voltage for further processing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile