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:
Aug. 17, 2010
Filed:
Oct. 04, 2007
Holger Haiplik, Swindon, GB;
Holger Haiplik, Swindon, GB;
Wolfson Microelectronics plc, Edinburgh, GB;
Abstract
A converter including an inductor (L), a first switch (SW, S) connected between an input terminal (V) and the inductor, a diode/switch (D, S), connected between the first end of the inductor and ground, a diode/switch (D, S) connected between the inductor and an output terminal (V), and a second switch (SW, S) coupled between inductor and ground. A current sensor senses current in the first switch (SW, S) as a measure of inductor current. Waveform generators () generate buck and boost slope compensation ramps (RMP-BUCK, RMP-BOOST). Control logic () opens and closes the switches every clock period at individual duty cycles determined using a feedback signal derived from the output terminal, the sensed current and the slope compensation ramps. The slope compensation ramps are mutually offset such that current sensing is needed only while the first switch (SW, S) is closed.