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US 12,439,204 B2Granted
Efficient seamless switching of sigma-delta modulators
AssigneeInfineon Technologies AG
InventorDietmar Straeussnigg
Life of this patent
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Abstract
A digital microphone includes at least one integrator; a state detection and parameter control component directly coupled to an output of the integrator; and a signal processing component coupled to an output of the state detection and parameter control component, wherein a parameter of the signal processing component includes a first value in a first operational mode and a second value in a second operational mode different from the first operational mode.
Claims20
A digital modulator comprising:
- a summer;
- at least one integrator coupled to the summer;
- a quantizer coupled to the at least one integrator;
- a state detection and control component coupled to an output of the at least one integrator;
- and
- a variable gain block coupled between the quantizer and the summer,
- wherein a gain control output of the state detection and control component is coupled to a gain control input of the variable gain block.
4 more elements
A digital modulation method comprising:
- summing an input signal and an output signal of a variable gain block in a summer;
- coupling at least one integrator to the summer;
- coupling a quantizer to the at least one integrator;
- coupling a state detection and control component to an output of the at least one integrator;
- coupling the variable gain block between the quantizer and the summer;
- and
- controlling a gain control input of the variable gain block with a gain control output of the state detection and control component.
4 more elements
A digital modulator comprising:
- at least one integrator coupled to an input of the digital modulator;
- a quantizer coupled to the at least one integrator and to an output of the digital modulator;
- a state detection and control component coupled to an output of the at least one integrator;
- a variable gain block coupled between the input of the digital modulator and the quantizer;
- and
- wherein a gain control output of the state detection and control component is coupled to a gain control input of the variable gain block.
3 more elements
Dependencies are inferred from the claim text.