关键词：传感器；移动通信电路；滤波器；芯片
摘 要：This book describes circuit engineering efforts for modern mobile communication. Electronic circuits for latest mass applications like mobile phones and smart phones are realized as so-called systems on chip (SoC). Such SoCs are realized in nanometer CMOS technology and contain a lot of digital circuits for digital signal processing but they also contain analog circuits which often form the key devices for a good over-all performance. The importance of analog filters nowadays is often underestimated. They are, however, still necessary to obtain high-performance wireless receivers and transmitters. In fact, progress in CMOS technology and circuit design allows the revolution in modern mobile communication. Every ten years, a new mobile phone generation is introduced. Recently, LTE (Long Term Evolution) was started by telecom companies to form the 4th generation of mobile phones. Up to 100 Mbit/s are possible with LTE for downloads, which is a much higher data rate than with HSPA+.