# Tag Info

## Hot answers tagged analog-to-digital

Accepted

### Why do we need DFT when we already have DTFT/DTFS?

The answer is the same to the question: "Why do we need computers to process data when we have paper and pencil?" DTFT as well as the continuous-time Fourier Transform is a theoretical tool ...

### Why do we need DFT when we already have DTFT/DTFS?

TL, DR: world pervasive algorithms (FFT-related)! The continuous Fourier transform, the Discrete-time Fourier transform (DTFT) and the Discrete Fourier transform (DFT) share conceptually similar ...
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Accepted

### Why can't quantization noise be zero?

Why then we still have $\Delta^2 \over 12$ quantization noise You need to read more closely: this is the quantization noise for continuous-uniformly distributed signal amplitudes and equally spaced ...
• 26.9k

• 12.5k
Accepted

### Using oversampling to increase resolution of a DC-signal as input

My input signal is a dc signal (sensor output) and im getting kind of a headache to understand why oversampling can increase the resolution of dc signals. The ADC puts out integers. So, let $x$ be ...
• 9,136