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Questions tagged [gyrator]

For questions about gyrators: linear, two-port, non-reciprocal electrical network elements which couple the current on one port to the voltage on the other and vice versa. Consider using related tags as applicable (e.g. "operational-amplifier" for gyrator circuits built with op amps using feedback).

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Recreating a transformer using gyrators

I have a transformer that I would like to recreate using gyrators. What I know about it: two coils wrapped around the same core the resistance and inductance of each coil the coupling factor the ...
andya's user avatar
  • 45
3 votes
4 answers
898 views

How does this EQ circuit work?

This is a "basic transformerless 5-band EQ using gyrators" schematic. I think I understand the top part (pots remove the frequency from either input of the op-amp, either increasing or ...
higefo's user avatar
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0 votes
2 answers
380 views

Circuit that makes capacitors behave like inductor and vice versa

They can be used in ICs. I vaguely remember reading about it few months ago, but I cannot remember its name right now. Can anyone help?
Łukasz Smoła's user avatar
2 votes
0 answers
102 views

Is the Gate-Controlled Diode an instance of a trancitor?

I'm not sure it entirely counts. It certainly isn't useful in the way that the current-controlled voltage source is useful as the original transcitor paper describes, but more importantly, I am unsure ...
NXTangl's user avatar
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0 votes
0 answers
91 views

Preventing opamp from possible saturation maybe

I am trying to simulate a gyrator circuit for implementing capacitor as inductor in LTSpice. While simulation I am encountering the following problem : It seems that top left opamp undergoes ...
beta_me me_beta's user avatar
1 vote
0 answers
93 views

Inductor Based on capacitor and gyrator

I was trying to implement Inductor using capacitor in Lt spice. But the circuit waveform is not steady. Also the impedance is not exactly proportional to frequency. please explain this deviation.
Aryan's user avatar
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2 votes
2 answers
917 views

Two port op amp gyrator circuit examples?

I can't seem to find any clear descriptions of how a two port gyrator circuit could be made from op amps. On Wikipedia, for example, it only gives this one port version describing an op amp based ...
Sir Galahad's user avatar
0 votes
1 answer
361 views

How to define the circuit that replaces the variable capacitor in its use with the TDA7000?

In the circuit below, there is a subcircuit that connects between C4, D1 and the VCC (5V), with Q1 and D2 as the central component, this circuit seems to me to be a Gyrator, I know that Gyrators are a ...
Delfino's user avatar
  • 303
1 vote
1 answer
240 views

Simulated inductor for guitar use

Edit: Sorry! Please bear with me, this is my first post! Well, it seems that placing a buffer before certain fuzzes can chance their sound. However, placing an inductor after the buffer cancels this ...
Mr KOSMOS's user avatar
0 votes
1 answer
277 views

Find admittance( G ) matrix of a resistive circuit

I am taking Signals And Systems class where I have to calculate the admittance parameter of a given circuit. A given circuit for example: This is tedious and calculating the parameters takes so long....
iconradez's user avatar
  • 455
2 votes
1 answer
876 views

Gyrator Derivation

I am trying to understand the input impedance calculation of this Gyrator circuit from Wikipedia. The input impedance Zin is given as: I am having trouble deriving this. My first reaction was to ...
EasyOhm's user avatar
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4 votes
1 answer
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Equivalent Inductor Equation (Antoniou Gyrator Proof)

I've been working on a proof for University and I've been able to understand most of what I was asked, but I'm having trouble understanding why is it that the equivalent inductor in an Antoniou ...
Arrigo Lupori's user avatar
1 vote
1 answer
235 views

Gyrator in matlab

I am new to matlab , i am trying to simulate a simple circuit to check my calculation I have done on paper. The circuit is the following, it has a gyrator and couple resistors.1 amp is flowing into ...
iconradez's user avatar
  • 455
0 votes
0 answers
139 views

Active inductor Circuit

I have created a series, shunt LC bandstop/notch filter. https://github.com/promach/frequency_trap/tree/development I am using gEDA with noqsi gnetlist backend and ngspice simulator However, I ...
kevin's user avatar
  • 535
1 vote
2 answers
393 views

Is it bad to leave a filter capacitor floating?

The circuit detail presented is a gyrator filter that is one of two that hang out in the feedback loop of an opamp, creating a "low" and "high" tone control for audio. (The "low" section is shown) I'd ...
user avatar
0 votes
2 answers
849 views

Antoniou gyrator with op-amps, simple explaination?

I need to demonstrate that this circuit behaves like a gyrator: circuit Now, I made this new version of the image: edit If I apply KVL to the blue surface I find out that the voltage on the top ...
Baffo rasta's user avatar
1 vote
1 answer
811 views

Finding the input impedance of this gyrator

I'm having a little trouble with this. I'm supposed to show that the input impedance of this gyrator is $$\frac{R^2}{Z}$$ but the math just isn't working out. The gyrator consists of negative ...
Servin Vashnar's user avatar
1 vote
1 answer
898 views

Finding Input Impedance of a Gyrator

I'm attempting to complete the question below. What I understand so far: The circuit can be modeled with an 'equivalent inductor' and gain stage (not sure if this models the whole circuit or just one ...
The Impossible Squish's user avatar
2 votes
1 answer
2k views

pros and cons of replacing a passive inductor by a gyrator

I am studying the construction of some touch sensors, and I need inductances of 10mH, I know I can easily do it, and also purchase them without much difficulty, however I know that it is possible to ...
Delfino's user avatar
  • 303
2 votes
2 answers
707 views

My Chua's Circuit is flatlining (i.e., malfunctioning)

I tried to build a Chua Circuit, but it doesn't appear to be working as expected. The problem is that, while it's supposed to be an oscillatory circuit, I see no oscillations. Refering to the diagram ...
Jordan's user avatar
  • 151
1 vote
0 answers
867 views

Floating Inductor Simulation Using Only BJTs?

I know it is possible to replace large-ish floating inductors (~ 5mH) with a gyrator, typically using two opamps: What I've unsuccessfully tried to solve is : can we build something equivalent to the ...
blondiepassesby's user avatar
1 vote
2 answers
2k views

Equivalent inductance of this gyrator

According to this link, the following schematic is equivalent to an inductance R1*R2*C placed between input and ground. Under which conditions is this true? As a guideline, we assume Vcc=9V. See this ...
yannick's user avatar
  • 171
0 votes
1 answer
2k views

How do I determine the inductance of a circuit using Op-amps, Capacitors and Resistors?

I am trying to prove that the inductance of a given circuit (between the source A, and ground) (see image below) is equal to (R1*R2*R4*C)/R3. Under the assumption that it is an ideal op-amp, I know ...
Kadin's user avatar
  • 227
2 votes
2 answers
3k views

Alternative to inductor on IC

I was running through the datasheet of CC2500 (Low-Cost Low-Power 2.4 GHz RF Transceiver) which has a dimension of ...
perilbrain's user avatar
7 votes
2 answers
2k views

What is a mutator?

I'm reading this paper by Chua on the memristor. He claims that Using a mutator, a memristor with any prescribed phi-q curve ...
Randomblue's user avatar
  • 11.1k
8 votes
5 answers
485 views

Sourcing parts for Really, Really low frequency filters

I'm doing a project at work that has a couple of esoteric requirements, particularly for a 0.1 Hz (0.07 Hz really, due to part availability limitations) Highpass filter (in the data acquisition system)...
Connor Wolf's user avatar
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9 votes
2 answers
371 views

Where's the energy in simulated caps/coils?

I understand that you can use a gyrator to simulate capacitors or inductors with (very) high values. A capacitor stores its energy in an electric field, an inductor in a magnetic field. Where is the (...
Federico Russo's user avatar
4 votes
4 answers
509 views

Theory: With an AC circuit adding capacitors will cause the current trend towards leading

so if you add enough caps can you emulate what an inductor is doing, ie. Lead the current so far that it appears to be lagging? I assume this doesn't work, why not?
stuckie27's user avatar
  • 407