It would be of great help if anyone could explain in detail how each component in the circuit works.

 

Are you the same person with DEBPARNA MAJUMDER?
This forum only allowed one person one ID, if you are the same person, please decide which ID that you would like to reserved ?

 

Are you the same person with DEBPARNA MAJUMDER?
This forum only allowed one person one ID, if you are the same person please decide which ID you would like to reserved ?

No. Debparna Majumder and I are classmates working on the same project.

 

No. Debparna Majumder and I are classmates working on the same project.

Ok, thank you.

 

Hello,

I would NEVER build the given transmitter as it will transmit EVERY 10.7 MHz.

Bertus

 

10.7Mhz, that is a little strange, I was played 88～108Mhz in Fm and remote control with 27Mhz.

 

Hello,

You will hear ALL harmonics created by the 10.7 Mhz filter used in the oscillator section.
The 9th and 10th harmonic can be heard in the FM band at 96.3 and 107 Mhz.
BUT the 8th harmonic will fall below the FM band 85.6 Mhz, wich could be in the aircraft band.

Bertus

 

Not all circuits you find on the internet are good ones. This one is illegal, a square wave should never be used to broadcast.

The ceramic resonator is filling the role of inductor in this circuit.

 

There is a frequency multiplier after the oscilltor. The transmitted frequency will be 96.3 Mhz.

 

So you have to divided by 9 for the audio, does the audio still can keep the normal sound ?

 

So you have to divided by 9 for the audio, does the audio still can keep the normal sound ?

There's some noise but the audio can be heard.

 

a freqiuency multiplyer does not devide the modulating frequency, it multiplys it. probably not enough since there is noise too. and using a varicap to fm modulate a 10.7 ceramic filter isnt going to fm the signal much.

 

Normally the FM transmitter modulate the frequency 88~108Mhz with audio sound that it assuming the frequency as 300Hz to 5Khz used a small microphone.

If you multiple the transmitter's frequency 9 time from 10.7Mhz to 96.3Mhz, then the audio frequency will be also multiple 9 times from 2.7Khz to 45 Khz, so that's why I said that you need to divided by 9 to back to the original frequency of audio sound, is this used digital or linear to divide the frequency that I'm interested in this.

 

Can anyone explain how the CMOS inverter N2 works as an oscillator in this circuit?

 

You asked that already in Homework Help.
http://forum.allaboutcircuits.com/threads/how-does-a-cmos-inverter-work-as-an-oscillator.111286/

 

You asked that already in Homework Help. Is this a homework or other school assignment?

Its a project I'm working on.

 

You asked that already in Homework Help.
http://forum.allaboutcircuits.com/threads/how-does-a-cmos-inverter-work-as-an-oscillator.111286/

You closed my thread
http://forum.allaboutcircuits.com/t...rter-work-as-an-amplifier.111282/#post-860673

This is a diiferent question. There is a difference between an amplifier and an oscillator.

 

There is a frequency multiplier after the oscillator. The transmitted frequency will be 96.3 Mhz.

There is no frequency multiplier. The 4069 gates merely act as buffers and current boosters for the 10.7 MHz square-wave. A square-wave output in theory contains an infinite number of odd harmonics of the fundamental frequency (the ninth harmonic being 96.3 MHz), so you will splatter RF interference across a wide band. See Bertus' post #7.

There is a difference between an amplifier and an oscillator.

Not much. Positive feedback from the output to the input of an amplifier turns it into an oscillator.

 

This is a diiferent question. There is a difference between an amplifier and an oscillator.

The difference is that "oscillators don't and amplifiers do."

 

If you multiple the transmitter's frequency 9 time from 10.7Mhz to 96.3Mhz, then the audio frequency will be also multiple 9 times from 2.7Khz to 45 Khz, so that's why I said that you need to divided by 9 to back to the original frequency of audio sound, is this used digital or linear to divide the frequency that I'm interested in this.

Don't think so. This is FM, so the deviation and modulation bandwidth will increase by 9 times, but the rate of deviation will be the same. The carrier will transition from one instantaneous frequency to the next at the original audio rate.

ak