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:
Apr. 02, 2002
Filed:
Mar. 21, 2001
Yoshizumi Sekii, Tokyo, JP;
NEC Corporation, , JP;
Abstract
When a first switch is closed, a power-supply voltage V is applied to a serial resonance circuit that is made up of a coil and a capacitive load. When the voltage V of the capacitive load exceeds the power-supply voltage V, a diode conducts a current, and thereby the voltage V of the capacitive load is clamped at the power-supply voltage V, and resonance stops. As a result, a flywheel current flows through a closed loop that is made up of a coil, a first diode, and a first switch in a closed state, in this order. When the first switch is opened, the flywheel current has the loop shut off, and, therefore, the voltage of the serial resonance circuit falls rapidly in order to sustain or maintain the current, and falls below the earth potential so as to allow a second diode to conduct the current. Thereby, the flywheel current flows through the path that is made up of the second diode, the coil, and the first diode, and is regenerated to the power source, and the current energy saved in the coil is returned to the power source.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile