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US 2019/0165775 A1Published application
Pulse density modulation adjustment
AssigneeInfineon Technologies AG
InventorsPedro Costa, Ketan Dewan
Life of this patent
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Abstract
A modulator having a pulse density modulator configured to generate from bit stream information a Pulse Density Modulation (PDM) stream based on a PDM clock; and a bit stream adjuster configured to divide the PDM clock into a PDM multi-phase clock, adjust a duration of at least one pulse of the generated PDM stream by selecting a PDM clock phase of the PDM multi-phase clock for sampling the generated PDM stream, and output an adjusted PDM stream.
Claims20
A modulator, comprising:
- a pulse density modulator configured to generate from bit stream information a Pulse Density Modulation (PDM) stream based on a PDM clock;
- and
- a bit stream adjuster configured to divide the PDM clock into a PDM multi-phase clock, adjust a duration of at least one pulse of the generated PDM stream by selecting a PDM clock phase of the PDM multi-phase clock for sampling the generated PDM stream, and output an adjusted PDM stream.
A modulation method, comprising:
- generating, by a pulse density modulator, from bit stream information, a Pulse Density Modulation (PDM) bit stream based on a PDM clock;
- dividing, by a bit stream adjuster, the PDM clock into a PDM multi-phase clock;
- adjusting, by the bit stream adjuster, a duration of at least one pulse of the generated PDM bit stream by selecting a PDM clock phase of the PDM multi-phase clock for sampling the generated PDM bit stream;
- and
- outputting, by the bit stream adjuster, an adjusted PDM bit stream,
- wherein the adjusted PDM bit stream has a higher resolution than the generated PDM bit stream.
3 more elements
Dependencies are inferred from the claim text.