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A delay line.
You should read the explanation there, That will give you more details than you can geti have seen this in my comm. course book.
You should read the explanation there, That will give you more details than you can get
in bits and pieces from several forum members. No one here has time to type what is equilvalent to a whole chapter in your textbook.
A mixer, BLENDS two or more signals.
If you have a square-wave, and a sine-wave, you can put them through a mixer and the result will be 1 signal with the square-wave ontop of the sine-wave.
why higher is more common.
An adder would give you a square-wave riding on top of a sine-wave. A mixer is a non-linear device which performs a multiplication to give the sum and difference of the two frequencies, not just the original signals on top of each other.A mixer, BLENDS two or more signals.
If you have a square-wave, and a sine-wave, you can put them through a mixer and the result will be 1 signal with the square-wave ontop of the sine-wave.
Read a book or look on the internet how a superhet receiver works.can you tell how to find local oscillator in circuit or give a fig. of it??
Because the side frequencies and amplitudes with respect to the carrier are maintained through the mixing process.As we change high freq. to low freq. in this process how can the message signal will not effected??
The IF frequecny can be whatever the circuit designer decides.The IF for FM should be constant always 10.7MHz