Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2011-06-21
2011-06-21
Pascal, Robert (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S251000
Reexamination Certificate
active
07965138
ABSTRACT:
Systems and methods for switched-mode amplifiers having improved harmonic distortion are disclosed. High order in-band filtering is enabled without undue trade-off of distortion due to intermodulation/aliasing. A pre-modulation block is introduced, deployed between a loop filter block and a pulse-width modulation block, performing uniform pulse-width modulation. The pre-modulation block attenuates/removes amplitude dependent high frequency ripples before pulse-width modulation. The pre-modulation block in conjunction with the pulse-width modulation block performs double sampling of the input signals.
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European Search Report 09368026.0-2215, Mar. 23, 2010, Dialog Semiconductor GmbH.
Ackerman Stephen B.
Dialog Semiconductor GmbH
Nguyen Khiem D
Pascal Robert
Saile Ackerman LLC
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