MCML结构高速数模转换器的设计

摘要

A 8-bit sub-section full thermometric coded high speed DAC with MCML structure was designed in TSMC 0.18μm 1P6M CMOS standard process .The SFDR of the DAC is 58.35 dB when the signal frequency is 122 MHz at 1GHz sample frequency. The SFDR of the DAC is 50.21dB when the signal frequency is 244MHz at 2GHz sample frequency.%本文基于MCML结构，采用TSMC 0．18μm 1P6M CMOS标准工艺设计方法，通过模拟仿真试验，设计出了一个8位分段式全温度计编码的高速数模转换器，该电路在采样频率为1 GHZ，输入正弦波频率为122 MHz时，SFDR达到了58．35 dB，在采样频率为2 GHZ，输入正弦波频率为244 MHz时，SFDR达到了50．21 dB。