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:
Sep. 12, 2006
Filed:
Jun. 10, 2004
Stewart E. Hall, Wellington, FL (US);
Douglas A. Drew, Boca Raton, FL (US);
Stewart E. Hall, Wellington, FL (US);
Douglas A. Drew, Boca Raton, FL (US);
Sensormatic Electronics Corporation, Boca Raton, FL (US);
Abstract
A method and apparatus to perform resonant recharge transfers energy from an AC power source (e.g., a power line) or from a DC power source or from bulk capacitors to a deactivation capacitor. The resonant recharge occurs faster than conventional techniques without the need for dissipative current limiting control elements. Through the employment of a resonant approach, the natural impedance of the resonant circuit limits the current without high resistive losses of a limiting resistor or other current limiting regulator. This may increase the efficiency of the recharge circuit and may charge the deactivation capacitor to a voltage that is higher than the voltage of the power source.