DESCRIPTION
The frontend is a high performance tuner circuit for AM/FM - DSP carradios with 10.7MHz - IF sampling.
   
■ RF AGC generation by RF and IF detection
■ I/Q Mixer for FM IF 10.7MHz with image
    rejection and programmable IF tank adjust for
    FM and AM
■ Preamplifier and mixer for IF 10.7MHz AM
    upconversion
■ VCO and programmable divider for “world
    receiver”
■ Programmable controlled IF-gain stage
   
Additional features:
■ High performance fast PLL for RDS-system
■ Electronic alignment for the preselection stages
■ All functions bus-controlled