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。
Based on 0.18 μm CMOS process, a ∑-△ modulator suitable for the receive chain of UHF RFID reader chip was designed. The system architecture of the modulator was single loop third order 4 bit quantizing topology. The modulator was implemented with switched-capacitor circuits. It had an input signal swing of more than --2 dB FS and an ENOB of over 12 bits within a signal bandwidth of 1.5 MHz at an over sampling rate of 16. Its operating current was 5 mA from a single 3.3 V supply voltage.
出处
《微电子学》
CAS
CSCD
北大核心
2015年第5期611-614,共4页
Microelectronics
基金
国家自然科学基金资助项目(61306034
61302005)
关键词
模数转换器
Σ-Δ调制器
开关电容
过采样数据转换器
Analog to digital converter
∑-△ modulator
Switched capacitor
Over sampling data converter
