I received an Eletronics Technician's certification in 1990, but I have been out of the field for many years. I still understand the basics and can design and build simple to moderate circuits. After being out of the field for 15 years or so, I have lost much of intricate information about "complex" circuits and need a source of explaination. For instance, you have a radio reception circuit, AM broadcast, Shortwave, FM broadcast or whatever. I can generally follow the circuitry but there will invariably be a capacitor here and a resistor there that seem to be out in left field. I know some of them are there for voltage or current control for ICs or for smoothing this or that or for overall circuit integrity, but is there a place I can see a moderate to complicated circuit with full explanation of all why the components were choosen? Thank You.