已知某DAC的最小分辨电压VLSB=40mV，最大满量程输出电压VFSR=10.2V，试求该电路输入二进制数字量位数n为多少？基准电压VREF为多少？
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What are the suggestions that the tutor gave to Ana on her course settlement in the foundation year？[Clink on 2 answers. ]
A. She can only take six modules.
B. She could take German as an option next year.
C. She needs IELTS for the first year of the degree.
D. She should take English as a foreign language.
电压激励型和电流激励型DAC有哪些差别？各适合于何种场合？
分别用与非门和或非门设计如下电路：
(1)三变量奇数个1判别电路；
(2)三变量偶数个1判别电路；
(3)三变量一致电路。
仿照7449的VHDL程序，写出7447的VHDL程序。据此写出电平高有效输出显示译码器7448的VHDL程序。
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