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Hi, Svein, thank you i know, but i wil like this one to make it work,Svein said:An FM detector is a complicated thing. I would use a dedicated IC - for example http://www.onsemi.com/pub/Collateral/ENA2052-D.PDF. You can also get the complete receiver in an IC: http://www.onsemi.com/pub/Collateral/EN8271-D.PDF.
hello NascenOxygen, in my book it looks like this, so what do you think where is the problem?NascentOxygen said:Comparing your ratio detector circuit with the standard design, reveals the problem.
View attachment 233930
There is no path linking your AUDIO OUT line to the audio side of the detector.michael1978 said:hello NascenOxygen, in my book it looks like this, so what do you think where is the problem?
from this circuit i did it in ltspice i thought he going to work but notNascentOxygen said:There is no path linking your AUDIO OUT line to the audio side of the detector.
Hello Tom, i think that, the value of L2 L3 are not correct, but i going to try to looks everything is ok wiringTom.G said:Your circuit looks good to me.
Is it the simulation that does not work or the circuit that you built?
The simulation you posted is a Transient analysis. But you need an AC analysis to get audio output.
If the circuit you built is not working, do the usual troubleshooting. Check all wiring and make sure the parts are the right values.
Cheers,
Tom
Hi Tom, i check all wiring, eveything is okey, i change the values of transformer, they change, but is not working.Tom.G said:Your circuit looks good to me.
Is it the simulation that does not work or the circuit that you built?
The simulation you posted is a Transient analysis. But you need an AC analysis to get audio output.
If the circuit you built is not working, do the usual troubleshooting. Check all wiring and make sure the parts are the right values.
Cheers,
Tom
The transformer primary and secondary are resonant circuits, and I think they are supposed to both be tuned to resonate at the same frequency. So as you sweep the input frequency, monitor the transformer primary and secondary signals and make sure their signal peaks do co-incide. Trim the capacitances until the peaks do coincide, and at the design frequency.michael1978 said:Hi Tom, i check all wiring, eveything is okey, i change the values of transformer, they change, but is not working.
How? What did you change to make it work?michael1978 said:Thanks everyone i fixed……...![]()
An FM Ratio Detector is a type of circuit used to demodulate frequency-modulated (FM) signals. It converts the frequency variations of the input signal into amplitude variations in the output signal.
An FM Ratio Detector works by comparing two signals: the input signal and a reference signal. The input signal is frequency-modulated, while the reference signal is a fixed frequency. The ratio between these two signals is then used to create an output signal with amplitude variations that correspond to the frequency variations of the input signal.
There could be several reasons why your FM Ratio Detector is not working. It could be due to a faulty component, incorrect circuit connections, or an issue with the input or reference signals. It is important to check all components and connections to troubleshoot the problem.
To troubleshoot your FM Ratio Detector, you can start by checking all the components and connections in the circuit. Make sure all connections are secure and there are no loose or damaged components. You can also test the input and reference signals to ensure they are functioning properly. If the issue persists, you may need to consult a professional or refer to the circuit's schematic for further troubleshooting steps.
If you have experience with circuitry and electronics, you may be able to fix your FM Ratio Detector by identifying and replacing any faulty components or correcting any incorrect connections. However, it is always recommended to seek professional help if you are unsure or inexperienced in working with electronic circuits.