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Design of CMOS Continuous-Time Low-pass Delta-Sigma Modulator for Digital Distributed Antenna System based on IF-over-Fiber Transmission

机译:基于IF-Fired-Fired传输的数字分布式天线系统CMOS连续时间低通δ-Sigma调制器设计

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A CMOS continuous-time low-pass delta-sigma modulator (DSM) circuit that digitizes an analog mobile signal at 10 MHz intermediate frequency (IF) in a digital distributed antenna system (DAS) with IF-over-fiber scheme is designed in this paper. Detailed design processes and results from system to circuit levels are provided, which is helpful for the design of a DSM circuit for another digital DAS system based on DSM technique. The simulated peak signal-to-noise and distortion ratio of the designed DSM circuit was 49.4 dB, and high stop-band rejection ratios were achieved by exploiting the zero optimization technique in the noise transfer function of the designed DSM.
机译:在其中设计了一种在数字分布式天线系统(DAS)中以10 MHz中频(IF)以10MHz中频(IF)在具有IF-FILED方案的中间频率(IF)的模拟移动信号的CMOS连续时间低通Δ-Sigma调制器(DSM)电路纸。提供详细的设计过程和系统到电路电平的结果,这有助于基于DSM技术的另一数字DAS系统设计DSM电路。所设计的DSM电路的模拟峰值信号 - 噪声和失真率为49.4dB,通过利用设计DSM的噪声传递函数的零优化技术来实现高止动带抑制比。

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