For radio production-is a frequency can wireless received.

For radio production-is a frequency can wireless received.
If you want to make it clear principle, please reference "rf communications circuit", science press ChenBang-love
radio
Had better look "complex-variable function and Laplace transform, the signal and system" and "the analog electronic circuit of the book.
If just want to look at the circuit, natural, so or recommend you said above the first book, and there are each part of the detailed circuit diagram, detailed each transistor's parameters and to meet method.
There were very simple figure, such as block diagram.
If just close transmission, that used to build a tool called the spell circuit of the electronic world things (very old)... That it seems to have some simple version.