【摘要】 采用0.18μm CMOS工艺,设计了一款可用于UHF RFID阅读器芯片接收链路的Σ-Δ调制器。该调制器采用单环3阶4位量化结构,由开关电容电路实现。在过采样率为16的情况下,调制器能够处理大于-2dBFS的输入信号,在1.5 MHz信号带宽内,达到12位以上的有效分辨率。整个调制器在3.3V工作电压下消耗5mA电流。更多还原

【Abstract】 Based on 0.18μm CMOS process,aΣ-Δmodulator suitable for the receive chain of UHF RFID reader chip was designed.The system architecture of the modulator was single loop third order 4bit quantizing topology.The modulator was implemented with switched-capacitor circuits.It had an input signal swing of more than-2dB FS and an ENOB of over 12 bits within a signal bandwidth of 1.5MHz at an over sampling rate of 16.Its operating current was 5mA from a single 3.3Vsupply voltage.更多还原