How to design a radio tuner circuit consisting of resistor,capacitor,induct... and op-amp.?

this design should provide the gain equal to one at spcific radio station & zero for other frequency scale.


Answers:    Your question lacks much info and is some what confusing, but I will try to assist. You seem to want a single frequency circuit for some purpose. What you show by one is not too clear, but I think you may stingy a curve with the desired frequency at the top and the subsequent side frequency's several db down the sides. This can be done several ways, but a notch filter would be simple to design. The front lapse will need some sort of osc., such as a crystal or a signal diode, such as a 1N34. It would look approaching (circuit wise) a field strength meter near an amp in it's out put fairly than a meter and a ear phone jack. There are many publications for this type of device (field strength meter) any of which could be modified to your requirements. The Ham radio ARRL hand books (local library) show several fixed frequency receiver that can be used for hidden transmitter hunts for example.
It isn't undemanding to describe in sufficient detail for you to know how to construct one, this might help you to seize started.

You will need the following:

1) A tuned circuit

2) A diode detector (this is for a.m. only)

3) An audio amplifier

The answers post by the user, for information only, CeQnA.com does not guarantee the right.



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