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US 9,871,533 B2Granted
Hybrid digital/analog noise shaping in the sigma-delta conversion
AssigneeInfineon Technologies AG
InventorIgor Ullmann
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Abstract
An analog/digital converter (ADC) includes an analog stage with at least one first sigma-delta modulator and includes a digital stage with at least one second sigma-delta modulator. The analog stage is configured for outputting a digital signal to the digital stage that is indicative of a noise contribution of the at least one first sigma-delta modulator. The analog stage and the digital stage may be arranged in a multi-stage noise shaping architecture (MASH) architecture.
Claims15
An analog/digital converter comprising:
- an analog stage comprising at least one first sigma-delta modulator;
- and
- a digital stage comprising at least one second sigma-delta modulator,
- wherein the at least one first sigma-delta modulator is configured to convert an analog input signal into a first digital output signal,
- wherein the analog stage is configured to output a digital signal to the digital stage, wherein the digital signal is indicative of a noise contribution of the at least one first sigma-delta modulator,
- wherein the at least one second sigma-delta modulator is configured to convert the digital signal into a second digital output signal,
- wherein the analog/digital converter is configured to determine a digital result signal which is indicative of the analog input signal on the basis of the first digital output signal and the second digital output signal, and
- wherein the analog stage and the digital stage are arranged in a multi-stage noise shaping architecture.
5 more elements
An analog/digital converter comprising:
- an analog stage comprising at least one first sigma-delta modulator;
- and
- a digital stage comprising at least one second sigma-delta modulator,
- wherein the analog stage is configured to output a digital signal to the digital stage, wherein the digital signal is indicative of a noise contribution of the at least one first sigma-delta-modulator, and
- wherein the analog stage and the digital stage are arranged in a multi-stage noise shaping architecture.
2 more elements
A method comprising:
- using a digital signal, coupling an analog stage with at least one first sigma-delta modulator and one digital stage with at least one second sigma-delta modulator,
- wherein the analog stage and the digital stage are arranged in a multi-stage noise shaping architecture.
Dependencies are inferred from the claim text.