# Tag Info

## Hot answers tagged matlab

10 votes

### Sine generator - Bubba Oscillator

It does oscillate, you can see that it does on the right side of the plot. If you zoom in on the left side you should also see the oscillation but at a much smaller amplitude. Your misconception ...
• 80.2k
8 votes
Accepted

### Why do MATLAB and LTspice give me different results for a band-pass filter?

Have a think about this extract from your LTSpice bode plot and the words I added to it: - And, if I used my simulator of choice (micro-cap) and told it to use 1 million points when calculating the ...
• 437k
7 votes
Accepted

### How to use Voltage Measurement in Matlab Simulink?

Your model is not built in simpowersystem environment so you can not use the voltage measurement block. The correct way to measure the voltage, is by using "voltage sensor" from Simscape>foundation ...
• 1,084
7 votes
Accepted

### Perfect component on LTspice

LTspice solves nonlinear differential equations numerically. It's not an AI system that can figure out intelligently whether a diode is conducting or not, and thus solve your homework questions or ...
• 379k
7 votes

### Why do MATLAB and LTspice give me different results for a band-pass filter?

You're seeing a few types of numerical issues: quantization of the frequency sample points, interpolation between those points, as well as rounding in the plot display. I built your circuit in the ...
• 3,654
6 votes
Accepted

• 7,505
4 votes
Accepted

### Generating a realistic sine wave in MATLAB

I have two approaches to do that when working in MATLAB. The first is to generate a clean sine wave, and then apply a distorting function. For instance applying x*(1+kx^2) for small k to your ...
• 159k
4 votes
Accepted

### How do we interpret frequency from fft command in matlab?

The output of the fft function will go from 0 Hz to fs/2, then -fs/2 to almost 0. If you ignore the 2nd half (for purely real signals), the following works well: For n samples at a sampling rate of ...
• 1,591
4 votes

### Does the bandwidth of an NBFM modulation change depending with the modulation index?

First note that the Carlson formula is only an approximation. Second, narrowband FM is defined as FM modulation for which the modulation index is small compared to one. When this is the case, the ...
• 15.8k
4 votes

### How would this circuit work?

As the "Graphene frequency doubler paper" which you indirectly refer to states, their frequency doubler schematic uses non-linearity of a GFET's current voltage characteristic (Fig. 4) to ...
• 3,626

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