Modulators – Pulse or interrupted continuous wave modulator – Pulse width modulator
Reexamination Certificate
2011-01-11
2011-01-11
Pascal, Robert (Department: 2817)
Modulators
Pulse or interrupted continuous wave modulator
Pulse width modulator
C332S107000, C330S010000, C375S238000
Reexamination Certificate
active
07868711
ABSTRACT:
An arrangement for pulse-width modulating an analog or digital input signal is provided. The non-linear distortion generated in the pulse-width modulator is precompensated by applying a signal with reversed error to the pulse-width modulator. The signal with reversed error is generated by a further pulse-width modulator that receives the input signal and whose output signal is subtracted from twice the input signal. The arrangement may e.g. be used to drive class D audio amplifiers.
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patent: 6356151 (2002-03-01), Nalbant
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patent: 2003-264465 (2003-09-01), None
patent: 03/043197 (2003-05-01), None
Gerzon, “Predistortion Techniques for Complex but Predictable Transmission Systems”, Aug. 1972, JAES, vol. 20, Issue 6, pp. 475-482.
M. O. J. Hawksford: “Dynamic Model-Based Linearization of Quantized Pulse-Width Modulation for Applications . . . ”; Journal of Audio Engineering Society; vol. 40; Apr. 1992; pp. 235-252.
Dooper Lûtsen Ludgeras Albertus Hendrikus
Nuijten Petrus Antonius Cornelis Maria
Johnson Ryan
NXP B.V.
Pascal Robert
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