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:
Oct. 31, 2006
Filed:
Dec. 23, 2002
Hsi Chin Cheng, Keelung, TW;
Hsi Chin Cheng, Keelung, TW;
Abstract
A low cost, board level, inductor-based charge pump is provided to generate a sufficiently high voltage to drive a power MOSFEThaving a rotor coilattached on its source side in an automotive alternator voltage regulator. A first BJT transistorof the charge pump receives a clock signal at its base from an application specific integrated circuit (ASIC). The clock signal continuously turns transistoron and off, forcing a current to flow through an inductorconnected to a voltage supply terminal. A second BJT transistorreceives a gate control signal at its base from the ASICfor turning the second transistoron and off to enable the circuit. In operation when the first transistoris turned off, a slowly decreasing current flows from the inductorto an output node. With the base of the second transistorlow to enable the system, the second transistoris turned off and the current flows from the output node through a capacitorto ground. The current charges the capacitorto a higher voltage level than the alternator system voltage Vcc. The voltage across the capacitoris sufficiently high to drive the power MOSFETin an automotive alternator voltage regulator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile