hallo..
i have to do an AM RADIO i want to know a suitable circuits for Tx & Rx
thank you for helping .

 

well some googling put me on the wikipedia page for am radio. You may want to start there. It kind of sounds like you're starting from the ground up.
Found a blog that has a very simple transmitter and seems to do a good job explaining it.
https://scitoys.com/scitoys/scitoys/radio/am_transmitter.html
No sure if im allowed to put links but there is one. I haven't built any but have done a little digging.

 

Is this a school/college project?