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.
Claims19
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 state detection and control component, and the summer.
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;
- and
- coupling the variable gain block between the state detection and control component, and the summer.
The method of claim 9, wherein the state detection and control component generates a first output signal if a state of the integrator is between a first threshold and a second threshold, and generates a second output signal if the state of the integrator is not between the first threshold and the second threshold. ii. The method of claim 10, wherein the variable gain block has a first gain value in response to the first output signal and for having a second gain value in response to the second output signal.
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;
- and
- a variable gain block coupled to the state detection and control component.
Dependencies are inferred from the claim text.