The ATR4255P is a highly integrated AM/FM front-end circuit manufactured using Atmel's advanced BiCMOS technology. It represents a complete, automatically adjustable AM/FM front end, containing a double-conversion system for FM and an up/down-conversion receiver for AM with IF1 = 10.7 MHz and IF2 = 450 kHz. The front end is suitable for digital or analog AF signal processing. Together with the PLL ATR4256, an automatically aligned high-performance AM/FM tuner can be built. These ICs are designed for highly sophisticated car radio applications.