# 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 ...
23k 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 ...
20k 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 ...
139 views

### Binary and Quadrature Phase Shift Keying [duplicate]

I was learning Modulation Techniques and was on the topic Phase Shift Keying (PSK). As far as I have understood, In Binary PSK we encode a single bit on a one signal element and we differentiate ...
7k 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 "...
2k 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 ...
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) ...
264 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 ...