Delta-sigma modulator with modified quantization error shaping
AssigneeInfineon Technologies AG
InventorsLuigi Grimaldi, Dmytro Cherniak, Fabio Padovan, Giovanni Boi
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Abstract
A digital phase-locked loop (DPLL) may include a delta-sigma modulator (DSM). The DSM may include a delay component configured to perform noise shaping of a quantization error introduced by the DSM. The DSM may include a noise transfer function (NTF) component configured to perform filtering of the quantization error introduced by the DSM. The DSM may include an adjustment transfer function (ATF) component configured to cause the filtering of the quantization error to be applied on top of the noise shaping such that an impact of the NTF component on the noise shaping is reduced.
Claims20
A digital phase-locked loop (DPLL), comprising:
- a delta-sigma modulator (DSM), including:
- a delay component configured to perform noise shaping of a quantization error introduced by the DSM;
- a noise transfer function (NTF) component configured to perform filtering of the quantization error introduced by the DSM;
- and
- an adjustment transfer function (ATF) component configured to cause the filtering of the quantization error to be applied on top of the noise shaping such that an impact of the NTF component on the noise shaping is reduced.
A delta-sigma modulator (DSM), comprising:
- a delay component configured to perform noise shaping of a quantization error in an output signal of the DSM;
- a noise transfer function (NTF) component configured to performing filtering of the quantization error;
- and
- an adjustment transfer function (ATF) component configured to cause the filtering of the quantization error to be applied without impairing the noise shaping.
A method, comprising:
- performing, by a delay component of a delta-sigma modulator (DSM), noise shaping of a quantization error introduced by the DSM;
- performing, by a noise transfer function (NTF) component of the DSM, filtering of the quantization error introduced by the DSM;
- and
- causing, by an adjustment transfer function (ATF) component of the DSM, the filtering of the quantization error by the NTF component to be applied in addition to the noise shaping performed by the delay component and without impairing the noise shaping.
Dependencies are inferred from the claim text.