Op amp Am FM Radio

Does anyone know of a website that has instructions on how to build an AM/FM operational amplifier circuit with an explanation of the circuit?
Thanks
Rico Bravo

AM/FM operational amplifier circuit

Sorry that phrase is meaningless. An operational amplifier is not AM or FM as these are modulation methods.
Do you mean an AM/FM radio?

http://www.national.com/pf/LM/LMX3162.html

Ok, say it another way. I would like to build a simple AM/FM Receiver from a 741 Op Amp(s) to drive a little 8 ohm speaker.
Thanks
Rico Bravo

AM seems feasible (simple tuning and a diode for demodulation), but FM normally uses a phase-locked loop to perform the demodulation.

Ok, Where is the circuit??

Bolting an op-amp onto the tail-end of a simple AM crystal radio (is the ZN414 still available?) to provide a bit of audio gain wouldn't be too difficult, but then reconfiguring the op-amp as a PLL is a whole different ballgame.

Have a google for "op-amp", "FM" and "PLL" "

I would like to build a simple AM/FM Receiver from a 741 Op Amp(s) to drive a little 8 ohm speaker.

Apart from the fact that this is nothing to do with an arduino then you can't do this with a 741.

  1. A 741 frequency response will no go high enough to handle medium wave signals (500KHz to 12.MHz).
  2. A 741 has not got enough output power to handle driving an 8 ohm speaker.
  3. A 741 frequency response will no go high enough to handle VHF wave signals (89 MHz to 104 MHz)

HA,
Found it!!