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:
Nov. 29, 2011
Filed:
Jun. 19, 2008
Marco Berkhout, Tiel, NL;
Benno Krabbenborg, Arnhem, NL;
Marco Berkhout, Tiel, NL;
Benno Krabbenborg, Arnhem, NL;
NXP B.V., Eindhoven, NL;
Abstract
A pulse width modulation (PWM) circuit comprises a first integrator (g m1) with a first feedback capacitor (C), a second integrator (g) with a second feedback capacitor (C) and a comparator (A) having a first input (V) connected to the output of the first integrator (g) and a second input (V) connected to the output of the second integrator (g). A connection path comprising a resistor (R) is established from the output of the first integrator (g) to an input of the second integrator (g). The first and second feedback capacitors (C, C) have capacities with a non-linear factor X(V) and a circuit with an inversely non-linear factor X(V) is arranged in the connection path between the output of the first integrator (g) and said input of the second integrator (g). The PWM circuit may form path of a Class-D amplifier.