问题
问答题 简答题
什么叫模数转换器?
答案
参考答案:
模数转换器(analog to digital converter)是能将模拟量转换成数字量的器件,简称ADC或A/D。模数转换器是利用数字系统分析、处理、控制模拟信号的桥梁。被分析处理的对象—般多为物理量,如温度、压力、位移、速度等。因此,它在需要应用数字技术和计算机技术对模拟信息进行分析、处理和控制的各个领域中得到广泛应用。
什么叫模数转换器?
参考答案:
模数转换器(analog to digital converter)是能将模拟量转换成数字量的器件,简称ADC或A/D。模数转换器是利用数字系统分析、处理、控制模拟信号的桥梁。被分析处理的对象—般多为物理量,如温度、压力、位移、速度等。因此,它在需要应用数字技术和计算机技术对模拟信息进行分析、处理和控制的各个领域中得到广泛应用。
My family came to America in 1985. _21_ of us spoke a word of English. Each morning I disliked going to school for fear of not __22__what people were saying. Very soon my mother noticed something was__23__me. The pain and care I saw in her moonshaped eyes made me burst into tears. I explained to her the __24__I had of going to school. “Learning English is not __25__,” my mother said. She cheerfully __26__the two of us work together to learn the language at home. The__27__and determination my mother had were admirable because English was as __28__ to her as it was to me. That afternoon,I saw my mother in a different light as she __29__me by the school fence. She was the shortest of all the mothers there, 30 , her face with her welcoming smile and big,black eyes was the most __31__. The afternoon sun shone__32__on her long,black hair creating an atmosphere that made her different from others. My mother and I immediately began reading together and __33__five new words a day. My mother,with her encouraging attitude,made the routine (惯例) fun and interesting. The fact that she was sacrificing (牺牲) her__34__ time before going to work so that I could learn English made me see the __35__she owned. Very soon I began to understand what everyone was saying.
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