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Questions tagged [gyrator]

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0
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1answer
30 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....
1
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1answer
72 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 ...
3
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1answer
142 views

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 ...
0
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1answer
67 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 ...
0
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0answers
80 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 ...
1
vote
2answers
182 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 ...
0
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2answers
367 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 ...
1
vote
1answer
355 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 ...
1
vote
1answer
439 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 ...
1
vote
1answer
909 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 ...
2
votes
2answers
368 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 ...
1
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0answers
537 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 ...
1
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2answers
1k 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 ...
0
votes
1answer
1k 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 ...
2
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2answers
2k 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 ...
7
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2answers
1k 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 ...
8
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5answers
417 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)...
9
votes
2answers
239 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 (...
4
votes
4answers
494 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?