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:
Feb. 19, 2013
Filed:
Jul. 14, 2010
Lutsen Ludgerus Albertus Hendrikus Dooper, Brummen, NL;
Gerrit Dijkstra, Renkum, NL;
Lutsen Ludgerus Albertus Hendrikus Dooper, Brummen, NL;
Gerrit Dijkstra, Renkum, NL;
NXP B.V., Eindhoven, NL;
Abstract
A switching amplifier comprising: an output driving circuit () including a pair of switching transistors (M, M) connected in series between a pair of supply voltage lines (V, gnd); a switch driver circuit () configured to drive the switching transistors (M, M) with first and second respective PWM signals dependent on an input signal (); an output connection between the pair of transistors (M, M) for driving an output load (); and an output current sensing circuit for measuring a current through the output load, the output current sensing circuit comprising: a current sensing resistor () connected between a first one (M) of the pair of transistors and an adjacent supply voltage line (gnd); and a voltage sense circuit () connected across the current sensing resistor, wherein the voltage sense circuit is configured to sample a voltage across the current sensing resistor () at a midpoint of successive corresponding portions of one of the PWM signals.
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