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. 27, 1995
Filed:
May. 24, 1994
Kim L Kha, Kowloon, HK;
Astec International Limited, Hong Kong, HK;
Abstract
A switching mode power supply is disclosed in which an input voltage is modulated by a switch and the modulated waveform is passed through an inductance, rectified and filtered to provide an output of a controlled value, and in which to determine the current passing through the inductance, the smaller of the root mean square (rms) current through the switch and the rms current through the rectifier is measured by including a current measuring resistor in series with that respective component, and the current through the other component is measured by including a current-sensing transformer in series with that component, the current through the inductor then being determinable as the combination of the other two currents.