# Questions tagged [electrical-signal]

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### Pulse signal to sine signal with the same frequency

I have a pulse signal with frequency f(t) And i want to generate from it a sine signal with frequency f(t) (f(t) doesn't vary a lot in time) Is there a method to do it directly with a function ...
1 vote
26 views

### Wavelet Scattering features extraction

I want ask about the wavelet scattering feature extraction with machine learning -- if it is correct to use it for fault detection in induction machines?
29 views

### Issues obtaining Clarke Park transform

I have a three-phase electric signal and I've been asked to obtain its Clarke-Park transform (also called direct-quadrature-zero or dq0 transformation). I'm using this Python library, and I've gotten ...
• 101
44 views

### What am i doing wrong?

How do I remove the noise (long vertical lines) from signal? I am applying AC voltage via function generator which is amplified by the power amplifier to a 6mm thick steel specimen. The signals are ...
49 views

### control system : time domain analysis

This is the question. According to this, when we solve for transfer function we will get $20/s^2+5s+24$. but this is not the correct format as numerator should be equal to the last term, i.e., 24, in ...
1 vote
2k views

### Computing phase difference between two sinusoidal signals

Based on this post here, I tried to calculate the phase difference between sine waves. Here is my code. ...
• 149
100 views

### Bandpass filter with a changing passband

The problem: I have a signal that contains multiple, relatively stable frequency components and I want to extract only one of them. I attached a plot that illustrates the situation with a simple ...
• 21
1 vote
104 views

### I have a problem in writing a program in MATLAB to plot the frequency spectrum of the double tuned amplifier

The equation of the double tuned amplifier is shown below in the image, the plot of the spectrum should look similar the the plot in the image below.
• 11
1k views

### Easy way of calculating peak to peak voltage of an AC voltage wave

I want to measure the peak to peak voltage of an AC voltage signal. The voltage itself is around 220V and 60Hz. When measured through a sensor connected to an Arduino, it is scaled down to, let's say ...
39 views

### total rms current from rms current values

I would like to calculate the RMS current value over a say an hour from RMS current values taken at minute intervals. I don't have access to the instantaneous current values, just the rms current ...
273 views

### The transmission distance of a signal

I am no professional in this area so please forgive me if this question is too immature. And thanks in advance for any help and information. I want to know how to calculate the transmission distance ...
1 vote
28 views

### Extracellular potential during extracellular stimulation

A biomembrane separates extracellular and intracellular space. It is known that the resting membrane potential of a nerve cell is -70mV and is caused by an electrochemical gradient acting on the ...
• 13
251 views

### Amplitude and phase compensation of analog filter

My analog filter perform much needed antialiasing and input protection. Unfortunately, the filter adds undesired changes in the gain/phase across frequency. For example, here is an example of ...
32 views

### Inverter voltage signal pulses data

We're performing analysis as a part of a project and we're looking for some data sources which we could use for our analysis. What we're looking for are specifically inverter voltage pulses which are ...
• 101
43 views

### Approximate irregular signal to square signal

I'm trying to approximate this irregular signal to a square signal because I need to get the amplitude and pulse width of it. Is it possible to do an approximation for it?
1 vote
169 views

### What is the importance of obtaining a linear signal?

I am a computer scientist who has started doing some work in the electrical engineering space – in particular, photonics. While reading about interferometric systems, I have noticed that there seems ...
• 155
113 views

### Transform lowpass filter to highpass filter, what happened to unit sample response and difference equation?

I know that multiple a lowpass filter signal by $(-1)^n$ can transform it to a highpass filter. $$s_{hp}[n]=(-1)^n s_{lp}[n]$$ But exactly what happened to the unit sample response and difference ...
• 11
1 vote
117 views

### porting matlab code on to TI OMAP L138

I have already working matlab based code for an application. i want to port on to OMAP L138 using matlab coder. I have some queries related to this Is it possible to do on a omap based custom board.?...
• 31
33 views

### Manipulating line level signals

I need to manage several line level signals (physically, not in software), and need to know what to expect. I was expecting AC signals, but am not quite sure. Are line level audio signals AC or DC? ...
• 103
1k views

### Why does the control effort increase if the bandwidth of the system is higher then the bandwidth of the plant?

I am studying control systems and I am focusing on the control effort. I have seen that if I place a pole at higher and higher frequencies, if the bandwidth of the system goes above the bandwidth of ...
• 183
347 views

### Generating band-limited NRZ signal

What is the bandwidth of a NRZ signal (of a given frequency) and how would you directly synthesize a discrete version a band-limited NRZ signal at some higher sample rate?
• 318
62 views

### What is the electrical equivalent circuit for this interaction? (Is this correct?)

A DSP text gives an example of an ideal mass striking an ideal string here: This is drawn as an equivalent electrical circuit as follows, where each R represents one of the two string segments the ...
• 533
254 views

### What does kchip/s datarate mean? [closed]

I am working in w mbus and came across this term kchip/s in datarate like 37.768 kchip/s what does the unit specify?
• 3
1 vote
186 views

### Nyquist frequency , sampling distance

I have few questions I tried to solve regarding nyquist theorem, and I would like to see your opinion if I'm doing it correctly?(one I know the answer second one not sure). 1.Let $f(x)$ and $g(x)$ be ...
• 137
1 vote
166 views

### Nyquist sampling

I know that if $f_\mathrm{m}$ is the "Nyquist frequency" (max frequency) and $f_\mathrm{s}$ sampling rate then $f_\mathrm{s}>2f_\mathrm{m}$. Am I correct so far? I have a signal $x(t)$ with max ...
• 137
12k views

### What is the difference between undersampling and oversampling in analog to digital conversion ?

When converting a signal from analog to digital, we observe undersampling and oversampling. Does oversampling means that the sampling frequency is greater that the signal's frequency and does ...
• 165
1 vote
1k views

### How to envelope a non periodic Impulse signal?

I want to analyse a trc oscilloscope file, find impulses and envelope them. In the end I want to plot the envelope. data file (trc): https://ufile.io/z4m4d Code: (Python) ...
1 vote
249 views

### Separating two frequency component

How can we separate two frequency component when they get mixed means when signal get mixed with noise how receiver can judge which part is signal and which is noise ?
169 views

### Unexpected peaks in power density following downsampling and filtering

I first applied a 100 Hz lowpass filter to my data, which was recorded at 30000 Hz: ...
109 views

### non-Mel Frequency Cepstral Coefficients

I'm trying to summarize the frequency domain information of an electrical signal as a feature engineering step for a machine learning algorithm. My hypothesis is that an anomaly will appear in the ...
• 101
35 views

### How best to analyse a 130volt +/- 20volt signal?

I want to measure and log a relatively high variable voltage signal, with minimum impact on the original signal. Normally the signal should average 130volts and vary by +/- 20volts at 10Hz. However ...
• 146
1 vote
93 views

### Time Delay Margin

I have a question regarding the time delay margin. I know the definition of time delay margin now I want to know that for the stability of the system is it good to have large time delay margin or ...
341 views

### Power Spectrum of the Current of Compact Fluorescent Lamp (CFL) Compared to the AC Input

Is it possible for an AC current (current passing from CFL) to have a harmonic component greater in magnitude than its fundamental? In my country fundamental frequency which carries power is 50 Hz. ...
2k views

### Problems Using FFT to Compute Impedance in a Model Neuron

I'm a neuroscientist currently investigating the resonance properties of a single neuron model that a colleague and I have constructed. The language we code in is Julia, which I hope is similar enough ...
• 151
411 views

### How to look at Rubidium frequency standard using the oscilloscope?

This question is about the checking hardware, please help if someone who has done it before. I have the Rubidium frequency standard: http://www.thinksrs.com/products/PRS10.htm and the Oscilloscope: ...
1 vote