A DSP-based digital IF AM/FM car-radio receiver
Francesco Adduci, M. Annovazzi, G. Boarin, Antonio Colaci, Vittorio Colonna, G. Gandolfi, M. Sala, F. Salidu, F. Stefani, M. Frey, P. Kirchlechner, C. Kutschenreiter, Andrea Baschirotto · 2004
This paper describes the design and the implementation of a DSP-based digital IF (intermediate frequency) radio receiver in a low-power 0.18/spl mu/m CMOS technology. Thanks to an advanced systems-on-chip mixed analog and digital solution, the proposed device performs the demodulation of both AM and FM stereo signals, digitized at the IF by means of a high dynamic range /spl Sigma//spl Delta/-bandpass analog to digital converter. The chosen architecture combines hardware and software functions, yielding true blind equalization of the FM channel; this results in an outstanding rejection of the adjacent channels and of any other interfering signal, even under severe multipath conditions. The described chip occupies as small as 15.21mm/sup 2/ and it is shipped in a compact 64-pin package, reducing application costs while ensuring state-of-the-art performance.