Questions tagged [random]
Use this tag when referring to systems that are random i.e are driven by stochastic processes.
52 questions
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What is the purpose of masking the LFSR value in STM32's noise generation?
I read on section 14.3.8 of the STM32F4 reference manual that you can mask the LFSR output value partially or totally.
At first I thought that it was used to change the pseudo random pattern (...
12
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1
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Are reverse biased transistors stable?
The usual circuit (found widely across the internet) for a true random number generator's (TRNG) entropy source is a reverse biased transistor like so:
Q1 is typically a 2N3904 as it has been found ...
Null♦
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1
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Time Auto-correlation function for a polar reutrn-to-zero waveform
I used matlab to calculate the time Auto-correlation function for a polar return-to-zero waveform
to make sure that it has an ergodic property . I implemented the following formula as a function in ...
CommunityBot
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1
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Questions about strange behavior with 74194
I would like to use a shift register to control source-select in a pre-amplfier.
After watching this very nice video on https://www.youtube.com/watch?v=Y4djl3oYqDQ,
I made the same setup on my bread ...
- 1,466
0
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1
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Synchronize random edge to clock edge
I have a steady clock signal and another signal with random binary pulses. Is there a simple circuit that can detect the rising edge of the random pulses and generate a pulse that is synchronized to ...
CommunityBot
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3
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Why does adding a capacitor in parallel with an avalanche diode reduce the noise amplitude?
I'm trying to make a simple avalanche noise random number generator.
This is my circuit:
simulate this circuit – Schematic created using CircuitLab
Without C1 the "avalanche rate" is ...
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0
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2
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random interval pulse for triggering sound effect [closed]
I am working on a small project using a cheap chinese MP3 player module, that can be triggered to play an mp3 by just sending it a pulse on one of its inputs.
The modules are of this type: https://nl....
- 112k
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Switching regulator issues?
I'm trying to use a switching regulator (ptr08060w) to step 12V DC down to 2V DC, however it is not achieving this at all (even with no load connected), and is outputting a voltage that varies ...
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1
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Effective resistance from a random resistance network
I am trying to calculate the equivalent resistance from a random resistance network formed by carbon nanotubes (CNTs.)
I have a MATLAB program where the CNTs are randomly distributed inside a volume. ...
CommunityBot
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1
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Second moments (i.e. E[X²]) for this WSS random process
I've attempted the question, please see attached image of my working out and solution to the question.
My main question is how to go from the last line of my working out to “2Rx(0) - 2Rx(t)" in ...
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Avalanche effect of a Zener diode, or simulator bug?
On the Falstad simulator, I tried to illustrate the phenomenon of the avalanche effect of Zener diodes. I've added a capacitor to remove the DC component, too.
However, I'm not sure that the (very low)...
- 34.7k
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4
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Simple low pass digital filter implementation for non-uniform sampling?
I have a system sampling an analog input and I want to filter that value using a simple, first order filter. EG something of the form:
Yn = A*Xn + B*Yn-1
However I have no control over the ...
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2
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2
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Transaction randomization succeeds, yet values do not meet constraints
In the following code, I attempt to randomize the transaction which contains a dynamic array 'PhyRB', with the constraint that each element in the array is less than 'ResBlks' value. Please note that ...
- 10.9k
1
vote
1
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Generating unique values for multiple cyclic random variables
In the following code, I have 2 cyclic random variables in a class. One (an enumerated type) takes 3 possible values, and the other takes 288 possible values (due to a constraint).
So, I expect to get ...
- 10.9k
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Why does output of this reverse bias noise source not have normal distribution?
I am trying to build a noise source based on reverse biased PN junction (i am trying to replicate this project https://altusmetrum.org/ChaosKey/ ). At this point i tried multiple iterations but so far ...
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