Spectrally shaped random signal

Abstract

An apparatus (100) comprises a signal generator (101) that is set up to produce a digital random signal (191). The apparatus (100) also comprises at least one filter element (102, 121, 122) that is set up to apply a high pass filter and a low pass filter to the digital random signal (191) in order to produce a spectrally shaped random signal (112). The apparatus (100) also comprises a modulator (103) that is set up to apply the spectrally shaped random signal (192) as dither.

Description

technical field [0001] Various embodiments relate to a device that includes a signal generator that is configured to generate a digital pseudo-random signal. The device also includes at least one filter element arranged to apply a high-pass filter and a low-pass filter to the digital pseudo-random signal to thus generate a spectrally shaped pseudo-random signal. The device also includes a modulator, which is set up to use the spectrally shaped pseudo-random signal as dither. Various embodiments relate to a corresponding method. Background technique [0002] Modulators, such as analog-to-digital converters (ADCs) or digital modulators, typically generate quantization noise. This quantization noise can cause undesired components in the output spectrum, so-called spikes, which are sometimes also called idle tones. This quantization noise generally causes a degradation in the quality of the modulator. [0003] Techniques for reducing such undesired components of quantization...

AI Technical Summary

Problems solved by technology

But such an application may have a large number of components and thus be expensive and error-prone

Images