A Full-Band Multi-Standard Global Analog & Digital Car Radio SoC with a Single Fixed-Frequency PLL

This paper presents a wideband car radio SoC for global multi-standard and multi-channel analog and digital broadcast radio. One of the major challenges of a wideband receiver is that the RF circuits and A/D converters need to have very high in-band IIP3 while the receiver NF should be low. These IIP3 and NF requirements are difficult to meet simultaneously. Key techniques to achieve low noise and very high linearity are high gain-bandwidth multi-inverter-based amplifiers supplied by PVT-tracking low-ohmic low dropout regulators, very linear high-speed 1-bit ΔΣ ADCs and a mixerless wideband AM front-end architecture. In FM mode the measured in-band IIP3 is 17.5dBm at a NF of 6dB. At maximum gain the NF is 4.1dB in DAB mode.