dineshbabumm
New Member
I am attaching a Fm transmitter circuit here. The common method of frequency modulating and transmitting is by connecting a L-C(tank) circuit to the collector of a transistor. The message signal is provided to the base. There is a capacitor between collector and emitter for cancelling harmonics.
Now for frequency modulation,the frequency changes only by varying either L or C. In this circuit which one varies and how are we getting frequency variation according to the message signal?
Both inductance and capacitor will not vary as per the circuit,but still we are getting the frequency modulation. Can anyone explain why it is so?? This circuit really works,but dont know how.. Also where is the much needed feed back path??
Please answer this question as we are discussing about this for a long time,but yet to get one solid explanation.. Please anyone help me.
Now for frequency modulation,the frequency changes only by varying either L or C. In this circuit which one varies and how are we getting frequency variation according to the message signal?
Both inductance and capacitor will not vary as per the circuit,but still we are getting the frequency modulation. Can anyone explain why it is so?? This circuit really works,but dont know how.. Also where is the much needed feed back path??
Please answer this question as we are discussing about this for a long time,but yet to get one solid explanation.. Please anyone help me.