Method for processing a digital signal in a digital delta-sigma modulator, and digital delta-sigma modulator therefor
AssigneesSTMicroelectronics S.r.l., Centre National De La Recherche Scientifique
InventorsAndreia Cathelin, Antoine Frappe, Andreas Kaiser
Life of this patent
Estimating the term…
Abstract
The digital delta-sigma modulator includes a signal input for receiving digital samples of N bits, and a digital filter connected to the signal input. The digital filter performs addition/subtraction and integration operations according to a redundant arithmetic coding for delivering digital filtered samples. A quantizer performs a nonexact quantization operation so as to deliver digital output samples of n bits, with n being less than N. The input of the quantizer is connected within the digital filter.
Claims23
1-12. (canceled)
A method of processing a digital input signal sampled on N bits within a digital delta-sigma modulator the method comprising:
- providing a filtered sampled signal according to a redundant arithmetic coding;
- and
- providing an output signal that is anticipated, the output signal being sampled on n bits using a nonexact quantization, with n being less than N.
A method of processing a digital input signal comprising:
- receiving digital samples of N bits an input signal;
- performing addition/subtraction and integration operations according to a redundant arithmetic coding for providing digital filtered samples based on the received input signal;
- and
- providing the digital filtered samples to a quantizer for performing a nonexact quantization operation for providing digital output samples of n bits, with n being less than N.
A digital delta-sigma modulator comprising:
- a signal input for receiving digital samples of N bits of an input signal;
- a digital filter coupled to the signal input for performing addition/subtraction and integration operations according to a redundant arithmetic coding for providing digital filtered samples;
- and
- a quantizer comprising an input coupled to said digital filter and performing a nonexact quantization operation for providing digital output samples of n bits, with n being less than N.
A wireless communication device comprising:
- a signal input for receiving digital samples of N bits of an input signal;
- a transmission chain coupled to the signal input and comprising
- a digital filter for performing addition/subtraction and integration operations according to a redundant arithmetic coding for providing digital filtered samples and
- a quantizer comprising an input coupled to said digital filter and performing a nonexact quantization operation for providing digital output samples of n bits, with n being less than N.
Dependencies are inferred from the claim text.