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25 Threads found on edaboard.com: Gyrator

problem with analog filter

An opamp in a "gyrator circuit" simulates an inductor but the schematic in the first post is completely wrong. Here is a gyrator circuit:

Bass boost circuit - need steeper slope

You dont want too steep a filter because that results in group delay and audible phase errors. Better to get a better speaker or choose a gyrator design for a graphic or another so-called parametric EQ. These emulate large L's with impedance inversion to

OpAmp Non-inverting amplifier using transistor in feedback network

It's gyrator used as simulated inductor, see with design equations.

gyrator circuit for active inductor

111618 how to find the impedance of the gyrator circuit and do the analysis to find Zin?? how are 2nd ,3rd and 4th equations obtained?? Plz help...

A simple question gyrator

Hi ByNeo458, it works as a voltage to voltage coupling, like an ideal transformer. See also: . Enjoy your design work!

Gyrator simulated inductor design?

Falstad's animated simulator includes a gyrator (active inductor) in its menu of circuits. Clicking this link will open the website, load the above schematic, and run it on your computer. (Cl

op-amp simulated inductor/gyrator explanation

Hello, can you please teach and explain me how this works? I'm reading about it here: have a lot of confusion actually. When the word ''sudden'' is used refered to the 1 volt DC applied, does it imply that it is an istantaneous DC

3rd overtone xtal osc.

Use a gyrator to emulate inductor

Question about the function of caps in this gm-c filter

Hi Guys In the attached pic, the two filters are suppused to be the same. One uses gm-c gyrator to replace big inductor in another pic. What are the four cap in the elleptical circles corresponds to? I was thinking they correspond to the cap 1.23p and 3.29 p in passive filter. But why do you need four of them? It is a IF filter in GPS appl

gyrator question (how does these two circuits be equal)

Hi Guys In wikipedia gyrator, they use a amplifer to replace the gyrator. They claimed the attached circuit are equivilent. First, I can not equal these two circuits. Second, even they can equal, how does it relative to the gyrator idea? In other words, how can a op-am function as a gyrator? Normaly you use two for (...)

Hi Guys In the attached pic, the two filters are suppused to be the same. One uses gm-c gyrator to replace big inductor in another pic. What are the four cap in the elleptical circles corresponds to? I was thinking they correspond to the cap 1.23p and 3.29 p in passive filter. But why do you need four of them? It is a IF filter in GPS appl

The gyrator adds a series resistance to the inductor is that true for your floating inductor gyrator? Maybe you could try simulating an ideal filter circuit with those series resistances added and compare both simulations.

how to design an UHF active bandpass filter

You can you gm_C filter which is based on gyrator. So first you find the passive BPF that you want to implement and then substitute each inductor with a combination of gyrator and capacitor. It is on-chip or off-chip filter. If it is off-chip, you might have problems to fulfill this spec.

How to choose gm and capacitor value in an active inductor realized by gyrator

Hi，As we know,in a gyrator active inductor,L=c/gm?. If we choose a capacitor value as small as possible,then the gm becomes small too,so the power consumption is small,which gives both area and power reduction. so my question is how to choose gm and capacitor value in reason？

Hi,all I want design a 7th low pass filter use LC ladder method, then use signal flow to convert it into inverting intergrator and non-inverting intergrator format. I'm not very clear with the relationship about L & C value with the cut-off frequency.Also I want to realize the active inductor with gyrator-C .what's the relationship with the opamp(

Can i use a inductor based on a gyrator for RFIC

Hi i have a doubt can i use a active inductor based on a gyrator for RFIC

active inducotor simulatin

Does any body know how to simuate (in spectre) to find the inductance of gyrator based active inductor??? Thanks.

oscillator using ative inductor

I was trying to simulate an negative transconductance oscillator using active inductor in spectre in .18u technology.but i was not getting any active inductor is basic gyrator C topology.when i tried to do tran analysis i was getting exponentially rising curve.. can any one please help me Is phase noise respons of oscillator using

Designing a bandpass elliptic filter

you can get the filter prototype by filter design software, and then replace the inductor included by gyrator and capacitor, its a easy way to design a elliptic filter. hope it helps!

How to make a simulated inductance?

Look for the circuit of Generalized Impedance converters or gyrators....

inductor using capacitors

this question was faced by one of my seniors during an interview how do we realise a inductor using 1 op-amp and 3 capacitors using a circuit sometimes called gyrator, it's possible to simulate an inductor. This circuit use one op-amp, one capacitor and two resistors. You can visit the following links: h

Question about frequency response in polyphase filters

I am studying the ployphase filter. (using a gyrator) Why the frequecny response are different when the phase of the inputs are different during the ac analysis. Could you subject any reference for me? Thank you!

Help me doing an internal phone

your requirement is not clear . What you would like to do ? To get all phones listen to each other just out electronic gyrator or simple 1 - 2 kOm 2 watt resistor to DC 48 volts and connect phones in parallel with one sode connected to resistor and another to ground . That is simplest and it works . But if you want to improive speech quality (the