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:
Dec. 08, 2009
Filed:
Mar. 25, 2008
Ting-chung Hsieh, Taoyuan Shien, TW;
Cheng-yen Lin, Taoyuan Shien, TW;
Sheng-chieh Chang, Taoyuan Shien, TW;
Min-jon Lee, Taoyuan Shien, TW;
Ting-Chung Hsieh, Taoyuan Shien, TW;
Cheng-Yen Lin, Taoyuan Shien, TW;
Sheng-Chieh Chang, Taoyuan Shien, TW;
Min-Jon Lee, Taoyuan Shien, TW;
Delta Electronics, Inc., Taoyuan, TW;
Abstract
An inverter apparatus has an adaptable high-resolution voltage-to-frequency (V/f) control. The inverter apparatus receives an analog input signal and includes a first circuit, a second circuit, a third circuit, and a micro-controller unit. The first circuit processes a small-signal portion of the analog input signal with a larger voltage gain. The second and the third circuit both processes large-signal portions of the analog input signal with smaller voltage gains respectively. The three processed analog input signals of the first, the second, and the third circuits are converted into three digital output values respectively. The largest digital output value is selected by the micro-controller unit and supplied to a frequency operation unit for generating a corresponding output frequency.