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# Questions tagged [analog]

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### Why is TV static noise always black and white?

Most modern day Cathode Ray Tube (CRT) televisions manufactured after the 1960s (after the introduction of NTSC and PAL standards) supported the circuit-based decoding of colored signals. It is well ...
21k 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 ...
1k views

So while answering how to design a PI controller for a first order time delayed system (Question Here ) Here is the closed loop equation to a control system: $$G_C(s) = \frac{\frac{K}{T}(1-sT)(s)... 2answers 1k views ### Understanding a Bainter Circuit (chebychev filter) As part of a class in Signal Processing, I am building a 3rd order Chebychev band reject filter. We implement this by using three cascading Bainter circuits. Although not part of the class, I have a ... 8answers 8k views ### 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 ... 3answers 335 views ### Going from digital to analog filters I've been learning about digital signal processing for some time, and I understand the principles in the digital world, as well as the conversion of continuous filters in the s-domain to digital ... 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 ... 3answers 209 views ### Low analog lowpass + ADC vs High analog lowpass + ADC + low digital lowpass I'm doing EEG data collection and my amp forces use of an analog lowpass filter before the ADC. I'm fairly sure that I won't be interested in phenomena associated with frequencies of 30Hz or higher, ... 1answer 72 views ### Is gamma correction applied in my setup I am working on a scientific application where I would like to evaluate luminance in an image, however I am unsure if what I receive from my setup is luminance (Y) or luma (Y'). I use a camera with a ... 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) ... 1answer 636 views ### Are there characteristics of photographic film that would make it an analog medium? There was an article a few years ago entitled "Analog is Not the Opposite of Digital". Film is not analog, period. I used to shoot film on a Canon AE-1 from the ’70s. Now I have a digital SLR from ... 1answer 93 views ### Compensating the Group Delay of an Analog Filter using DSP I am having a problem in my current project where I need to measure different biological signals (like ECG) simultaneously. As the instrumentation hardware is developed by different people over time, ... 1answer 59 views ### analog-to-discrete-to-analog system sampling problem This is not a homework problem, I am solving practice problems for my exam. Consider the analog-to-discrete-to-analog system shown in figure 1. The CT signal x_a(t) is sampled at a frequency of ... 1answer 2k views ### Understanding “voltage” and “power” in SNR of a sampled signal I'm facing a gap in my understanding of when a signal is a "voltage" signal and when it is a "power" signal that I've always managed to avoid resolving until now... First what I think I understand, ... 2answers 2k views ### Analog Hilbert transformer I know the FIR approach, I have seen IIR, to, but I'd like to know if it's possible to implement a Hilbert transformer in analog domain, i.e. with integrators instead of delays. Is it possible? If yes,... 1answer 295 views ### Proof-of-concept for active noise cancellation to block consistent low-frequency HVAC noise transmission Background We live in a multi-unit building where each unit's HVAC system/closet is located directly across a party-wall from the neighboring unit's bedroom, and adjacent to a shared external curtain ... 3answers 11k views ### If Digital Signal has frequency components then why we don't use it As we know there are two kinds of signals: analog signals and digital signals. And there are two common techniques for multiplexing the signals: Time Division Multiplexing (TDM) and Frequency ... 1answer 18k 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 330 views ### DAC to Analog Filter to ADC As the order of filter needed for digital information gets higher, it takes longer to process and requires more memory. Maybe analog filtering could be of use here. I know that the words analog and ... 1answer 290 views ### Plotting the discrete time signal Consider the following analog signal$$x(t) = 2 \sin(100\pi t)$$The signal x(t) is sampled with a sampling rate F_s=50\textrm{Hz}. Determine the discrete time signal. Plot the discrete time ... 1answer 303 views ### Can we determine if a filter is butterworth or chebyshev from its physical topology? Can all analog filters be classified as Bessel, Elliptic, Butterworth or Chebyshev? Given a physical ladder topology of several stages of {L, C or LC} in {series or parallel}, is it possible to ... 0answers 199 views ### Designing a practical integrator One way to describe a practical integrator ("leaky integrator") is$$ H(s) = \frac{g R}{1 + sRC} $$I am trying to understand how to choose the values g, R and C because in practice, I will ... 1answer 292 views ### Digital Vs. Analog Phase measurement [closed] I'm working on a Ultrasonic Transducers resonance tracking system. Where phase shift between Voltage and Current is the feedback signal for my system when phase difference is Zero that means system is ... 3answers 164 views ### Linearizing digital-analog converters I'm looking at ways to improve the effective resolution of DACs. It seems that element mismatch (i.e. integral non-linearity) is the main contributor to distortion in modern DACs. Apart from ... 3answers 655 views ### FIR analog low-pass filter? Is there a way to construct FIR analog low-pass filter? (By this, I believe I am asking for no-pole analog low-pass filter, in terms of Laplace transform.) 3answers 617 views ### Applying Nyquist theorem to digital vs. analog audio quality I had a recent conversation with a friend about analog vs. digital recordings. He shared his opinion that music recorded by analog techniques is of superior sound quality to music recorded by digital ... 1answer 60 views ### When calculating SNR, is noise included in signal? Given a signal x(t) = s(t) + n(t) where s(t) is the desired signal voltage and n(t) is the noise, should the signal to noise ratio of this signal be 20log(xrms/nrms) or 20log(srms/nrms)? i.e., ... 1answer 826 views ### How to simulate analog VU meter response to audio? I'd like to simulate the movement of an analog VU meter dial as shown below and often found on stereos and other music monitoring equipment. I just learned through this article by Rod Elliot (ESP) ... 2answers 2k views ### Relation between Normal Phase Shift of a wave and Phase Modulation I am little confused with the Phase Modulation and the phase of a sine wave. I get the phase modulated wave from the google images as below: Phase modulation has the form:$$PM(t)=A_c \cos\big(2\pi ...
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I have a $14$-$\textrm{bit}$ ADC which can take $-10\textrm{ V}$ to $10\textrm{ V}$ as input. So, $0$ to $16383$ (digital) represents the voltage from $-10$ to $10$. If I want to get the actual ...
39 views