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Questions tagged [loop]

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Rise in Loop Gain (Part 2?)

All, I am going through an older textbook and am looking at some examples regarding stability. I can successfully model the circuit in the book and get the same results as the author. In this case ...
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0answers
25 views

Shunt Shunt Feedback SImulations

I am trying to simulate the solution to an old text book example on a simple Shunt-Shunt feedback amplifier. simulate this circuit – Schematic created using CircuitLab The book only shows BF = ...
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0answers
71 views

Basic electrical circuit loops

Hi I have a basic electrical circuit and I am trying to make loops. Those things on IMG-2. I just don't understand how are they made. Why are the "one square loops" only in upper squares and not ...
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0answers
43 views

Calculating equivalent resistance using loop analysis with no applied voltage

I have a bridge circuit that I am supposed to find an equivalent resistance between points K and P for using loop analysis. I am aware that a delta Y transformation is the much more direct route, ...
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2answers
2k views

Two parallel wires with no resistance - why it's wrong?

I've built the scheme below in circuit simulator and it didn't work because of "wire loop" mistake. Why it's wrong? Why it's wrong physically? The simulator is falstad.com/circuit
3
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3answers
557 views

getting error from for loops in vhdl

Hi I am trying to use 2 nested for loops in vhdl but I get this error. [Synth 8-561] range expression could not be resolved to a constant [318] I do not understand why this code is not working since ...
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0answers
42 views

VHDL Transition Function - Loop Range [duplicate]

So I was tasked with creating a function "transitions" that takes as input a value of type std_logic of arbitrary length. The returned value should be an integer that records the number of transitions ...
2
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3answers
214 views

Why must current loop in a circuit? [duplicate]

This is a problem that's bothering me for a while, and I'm going off accepting other people's claims rather than figuring out the first principles of circuits. Consider this circuit right here. From ...
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1answer
46 views

Mesh Current Method.(Current assignment)

simulate this circuit – Schematic created using CircuitLab I am trying to solve this using the mesh current method. I assigned the current direction as follows From this I used KVL for each ...
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1answer
7k views

Question about Synthesizable For loop and Generate

I am using the Verilog language and Zedboard as a target board. As far as I know, the for loop can be synthesized, and the synthesis tool translates the for loop as a sequence of duplicated ...
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1answer
98 views

Two Mesh Currents through One Source

I am trying to determine the mesh currents in the following circuit. I consider the mesh currents (from left mesh to right mesh) to be called I1 and I2. simulate this circuit – Schematic ...
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2answers
629 views

Does electricity always flow in a closed loop and why does current flow to ground?

I have been taught that current flows in a closed loop back to the source. And with electrical distribution, current flows to ground because the whole grid is effectively grounded back to the source. ...
1
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1answer
193 views

End of loop resistor or “terminator resistor”

In fire alarm control panel, I saw that at the end of the fire loop a 4.7kΩ resistor is used. My question is why we use the value 4.7kΩ? Is their any law for this choice?
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1answer
81 views

Loop Analysis - Resistor always a drop?

I feel really dumb asking this, but why is a resistor always a drop in loop analysis? For instance, in the picture the KVL #2 equations are the correct ones, but why? Shouldn't the resistors keep the ...
0
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1answer
39 views

Variable does not bounce back as desired (LED's)

I am changing a variable with a predetermined rate. When my variable gets too large, I cap it back to the largest value I want to make it, and change the sign on the rate to make the change go the ...
0
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1answer
141 views

Closing the loop and creating the current in antennas

I remember Feynman explained that raid waves are emitted by accelerated charged particles. So, the only the things that antenna transmitters do is just up-down oscillation of the current simulate ...
3
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3answers
324 views

Baffling combinatorial feedback loop message in VHDL with ISE Design Suite

When I try to synthesize my VHDL design (using Xilinx ISE Design Suite), I get the message: ...
0
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3answers
172 views

Shouldnt the magnetic field at a certain angle be minimum in center of current loop?

Magnetic field is strongest at the center of current loop. But if it is calculated along a single magnetic field line like this: A and B are magnetic lines. Shouldnt it minimum in the center since ...
0
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1answer
64 views

Phase lock loop frequency of reference signal

I am writing a Matlab code for phase locked loop and up to now I assumed that frequency of input signal is given (known) and I choose frequency of my VCO close or exactly the same as reference signal. ...
0
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1answer
362 views

Loop for two binary values in VHDL

I'm trying to write a loop for two binary values that repeat periodically at a specific amount of time that goes indefinitely or until a certain condition is met. Here is what I have wrote (below), ...
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1answer
165 views

Find test current in Thevenin circuit

I deactivated all the independent sources and removed the load resistance across terminals a and b, then applied test voltage Vt=1V across 1V. I have to find It. My calculations: It=i2-i1 Mesh 1: -1 ...
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1answer
382 views

for Loop Through String in VHDL

I'm trying to write a loop in VHDL that will print a certain message on an LCD screen. I have predefined the following: ...
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2answers
184 views

Loop current of the loop containing a current source

I am currently studying circuit analysis methods and there is one thing regarding the Loop Current Method I do not fully understand. Let us take a look on the loop current sketched below: As far as ...
2
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1answer
2k views

AVR asm wait loop explain

Can someone please explain me this code (it is from wait loop calculator), I cannot clearly understand calculation. ; Delay 1 600 000 cycles ; 100ms at 16 MHz ...
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2answers
2k views

ModelSim VHDL - Nested 'for' loops behaviour

I've now been a couple years working with VHDL in college and I've been using ModelSim to simulate my designs. Today, however, I noticed something I couldn't understand about for loops, so I thought I'...
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3answers
2k views

main program run like an infinite while loop [duplicate]

I'm working in PIC24F microcontroller. My main program doesn't have infinite loop, but it is run like an infinite loop. Before I test the code with infinite while loop (while (1)), but when I remove ...
0
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1answer
249 views

Insertion Resistance of Current Transformers

Given a current transformer like this: there is an insertion resistance that appears as a very small equivalent series resistance on the measured circuit. Since it is usually small (say, 0.0001 \$\...
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1answer
307 views

SPICE how to assign a variable voltage generator for receiving antenna

I would like to do an AC analysis, noise analysis and signal to noise simulations using TINA TI - LT spice is OK How do I assign a variable voltage with parameters to an AC voltage source in SPICE? ...
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2answers
1k views

Help! Verilog loop! The following signal(s) form a combinatorial loop

I'm trying to complete an assignment using Verilog, the details aren't too important, except that it must be a combinatorial design. Unfortunately I'm running into what I assume is the hardware ...
0
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1answer
754 views

Current loop Converter

Is it possible to convert a 2 wires current loop to RS232, and from RS232 to current loop, I am trying to put an RS232 sniffer in the middle so I can see what they are communicating to each other. I ...
1
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1answer
246 views

When an isolation transformer is not enough? [closed]

I work for a fairly large church and we have powered line array speakers that do not have attenuators in them. Over time a ground loop occurred from the stage lighting causing a very distracting hiss/...
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1answer
4k views
0
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3answers
647 views

Step response to feedback loop with disturbance

When using step response to a feedback loop with disturbance. Why do we analyze the step response of the disturbance D and the step response of the input R separately. Instead of considering them ...
2
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2answers
142 views

VHDL: Looping through a module asynchronously

I have a VHDL module that applies a shuffle algorithm to a 64 bit input and outputs the 64bit result. I need to loop this output back through the module exactly 4 times, i was wondering if there was ...