# Questions tagged [analog]

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### Nyquist Frequency Phase Shift

The figure below shows in dashed lines sinusoidal signals of the same frequency at three different phase shifts. The signals are then sampled such that the sinusoidal frequency is exactly a half of ...
9answers
20k views

### Why do we use window in time domain rather than do FFT modify the spectrum and than inverse FFT

I thought that DSP would be done by using FFT of portions of a signal, modify the samples that result from FFT (since they represent the spectrum of our signal + noise) and remove any unwanted signals ...
1answer
17k views

### What is the difference between continuous, discrete, analog and digital signal?

It's my first time studying DSP and I've faced a problem finding a convenient definition. Are the following definitions correct? And if so why there are some resources defining it in other terms such ...
2answers
5k views

### Essential Bandwidth of rect(t/T)

Here is a question I have been trying to solve: Estimate the "essential bandwidth" of a rectangular pulse $$g(t) = \operatorname{rect}\left(\frac{t}{T}\right),$$ with $T>0$, where this "...
2answers
1k views

### How increasing the Signal to Quantization noise increases the resolution of ADC

Inside ADC we have a quantizer, when the sampled signal is passed through it, the signal values get discretized. The number of discrete levels in which the signal is discretized is called the ...
1answer
2k views

### Analog signal can be discrete time?

I am new to this site and field too.I always thought analog is continuous and digital signal is discrete. I read this today and got confused about analog signal Analog can be continuous time(CT) ...
0answers
181 views

### Designing a practical integrator

One way to describe a practical integrator ("leaky integrator") is $$H(s) = \frac{g R}{1 + sRC}$$ I am trying to understand how to choose the values $g$, $R$ and $C$ because in practice, I will ...
1answer
66 views

### Separate Complicated Signal into Exponential Components

This morning, I asked a similar question about separating simple signals - with constant frequency - into exponential components. User @AndreasH suggested that a hilbert transform can do this as ...
2answers
724 views

### Confused about anti-aliasing in analog filters

I'm a newbeginner when it comes to signal processing. I'm reading up about anti-aliasing, Nyquist and band-pass filters. There's something I don't get: Anti-aliasing in analog filters. Lemme try to ...