Everyone wants more for less: smaller, more features, less power, better packaging, lower cost, etc. More features are better, and to meet this demand, today\'s discrete solutions are tomorrow\'s integrated solutions. This means that smaller, more power, lower cost, and higher reliability will drive the market. Integration and innovation are key goals that manufacturers must achieve to succeed in the market. Mobile computing and communication devices are now commonplace. The development of digital electronics is the driving force behind this development, but analog electronics is equally important and both are indispensable. Digital is \"base 2\", which means that the signal is either one state or another, either \"on\" or \"off\", either \"true\" or \"false\", either \"1\" or \"0\", and so on. Analog signals operate continuously in various states. Analog signals are the way everything in the world works and the way human senses perceive the world. Therefore, analog signal processing is required to process signals such as light and sound in the \"real\" world. In cellular base stations, digital electronics perform many complex functions, usually under the control of software and firmware. Analog electronics are required to transmit and receive signals. Data converters are used to convert signals from one domain to another, from digital to analog and back to digital. Figure 1 shows the transmit (Tx) and receive (Rx) architectures and the related semiconductor processes commonly used today.
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