Digital input class-D amplifier
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United States of America Patent
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Mar 16, 2010
Grant Date -
Sep 18, 2008
app pub date -
Mar 14, 2008
filing date -
Mar 16, 2007
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Abstract
A digital input class-D amplifier includes a decoder which outputs a plurality of lines of time-series digital signals having a density of 1 or 0 conforming to an input digital signal, an error integrator which integrates a difference between a drive waveform to be applied to a load and a sum of the plurality of lines of time-series digital signals output from the decoder, and a modulation circuit which generates a pulse modulated with a pulse width or a pulse density based on a result of integration performed by the error integrator. The load is driven in accordance with the pulse generated by the modulation circuit.
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