Back to results
US 10,601,439 B2Granted
Sigma-delta converters and corresponding methods
AssigneeInfineon Technologies AG
InventorsMartin Pernull, Massimo Rigo, Herwig Wappis
Life of this patent
Estimating the term…
Abstract
Sigma-delta converters having a sampling circuit are provided. The sampling circuit is actuated such that sampling times are at least partially random.
Claims19
A sigma-delta converter, comprising:
- a sampling circuit configured to sample an input signal,
- a sigma-delta modulator configured to process the sampled input signal and generate an output signal, and
- a sampling controller, configured to actuate the sampling circuit in order to sample the input signal at at least partially random sampling times, wherein the at least partially random sampling times are based on a variable delay, and wherein a maximum length of the variable delay is a clock period of a clock signal controlling a quantizer of the sigma-delta modulator.
A sigma-delta converter, comprising:
- a sampling circuit configured to sample an input signal,
- a sigma-delta modulator configured to process the sampled input signal and generate an output signal, and
- a sampling controller, configured to actuate the sampling circuit in order to sample the input signal at at least partially random sampling times, wherein the sigma-delta converter is an asynchronous apparatus in which the sampling controller is configured to actuate the sampling circuit based on a decision made by the sigma-delta modulator.
A method for controlling a sigma-delta converter, comprising:
- generating at least one clock signal on based on a random value, and
- actuating the sigma-delta converter on based on the at least one clock signal such that sampling times of a sampling circuit of the sigma-delta converter are at least partially random sampling times, wherein the at least partially random sampling times are based on a variable delay, and wherein a maximum length of the variable delay is a clock period of a clock signal controlling a quantizer of a sigma-delta modulator of the sigma-delta converter.
A method for controlling a sigma-delta converter, comprising:
- generating at least one clock signal on based on a random value, and
- actuating the sigma-delta converter on based on the at least one clock signal such that sampling times of a sampling circuit of the sigma-delta converter are at least partially random, wherein the sigma-delta converter is an asynchronous apparatus in which the sampling controller is configured to actuate the sampling circuit based on a decision made by a sigma-delta modulator of the sigma-delta converter.
Dependencies are inferred from the claim text.