METHOD AND CONTROL CIRCUIT FOR CONTROLLING PULSE WIDTH MODULATION

WIPO Patent Application WO/2009/131440

A8

The invention provides a method and a modulation circuit for pulse width modulation with feedback, wherein a pulse width modulated signal is provided on the basis of an input signal and a reference signal that is periodic and has a reference frequency. The pulse width modulated signal is provided in that an output signal is switched from a first voltage level to a second voltage level in dependence on a comparison between the input signal and the reference signal at least once in every cycle of the reference signal, and in that at least once at a fixed moment in time in every cycle the pulse width modulated signal is switched from the second voltage level to the first voltage level. Furthermore, a periodic correction signal is added for compensation of the switching from the second voltage level to the first voltage level in the pulse width modulated signal.

JPS56162516	POWER AMPLIFYING CIRCUIT ON PULSE-WIDTH MODULATION SYSTEM
JP4116005	Delta-sigma modulator and switching amplifier circuit using it
JP5713543	Pulse width modulation circuit and switching amplifier using it

PUTZEYS BRUNO JOHAN GEORGES (BE)

PCT/NL2009/000100

December 02, 2010

April 22, 2009

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HYPEX ELECTRONICS B V (NL)
PUTZEYS BRUNO JOHAN GEORGES (BE)

H03F3/217; H03F1/32; H03F1/34; H03K7/08

NIESTADT, Bart, Jan (P.O. Box 645, AP Eindhoven, NL)

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