毕业论文_数字频率计设计.doc
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毕业论文_数字频率计设计,资源包括：正文doc格式共22页 4491字摘要在电子技术中，频率是最基本的参数之一，并且与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。数字频率计测...
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资源包括：正文DOC格式共22页 4491字
摘 要
在电子技术中，频率是最基本的参数之一，并且与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。数字频率计测频有两种方式：一是直接测频法，即在一定闸门时间内测量被测信号的脉冲个数；二是间接测频法，如周期测频法。直接测频法适用于高频信号的频率测量，间接测频法适用于低频信号的频率测量。 本文介绍了数字频率计的设计过程，并用EWB对电路进行了仿真。
Abstract
In electronic technology, the frequency is one of the most basic parameters, and the Senate, and many of the measurement, the measurement results have very close relations, so the frequency of measurements, it is much more important. Measuring the frequency of a number of means, including electronic counter measure the frequency with high precision, ease of use, rapid measurement, and to facilitate realization of the advantages of full automation of measurement, frequency measurement is one of the important means. Digital frequency of measuring frequency in two ways: First, direct measurement of the frequency, or within a certain time gates measuring the number of detected signals in pulses; Second, the frequency of indirect measurement, such as measuring the frequency of cycles. Direct Frequency Measurement Law is applicable to high-frequency signals in the frequency of measurements, indirect Frequency Measurement Law is applicable to low-frequency signals in the frequency of measurement. In this paper, digital frequency of the design process, with EWB and the simulation of the circuit.
目 录
摘 要 1
Abstract 2
1.方案比较 3
1.1方案一 数字频率计 3
1.2 方案二 由ICM7216D构成的单片数字频率计 4
2.实验原理 7
2.1 数字频率计的基本原理 7
2．2数字频率计的主要技术指标 8
2.2.1频率准确度 8
2.2.2频率测量范围 8
2.3各部分的作用及电路选择 8
2.3.1放大整形电路 8
2.3.2 时基电路 9
2.3.3 逻辑控制电路 11
2.3.4 锁存器 11
2.3.5计数器 12
2.3.6 译码电路 12
3 各部分电路仿真 14
3.1放大整形电路的电路图和仿真 14
3.2 时基电路的电路图和仿真 15
3.3 逻辑控制电路的电路图和仿真 16
3.4 计数器的电路图和仿真 17
3.5 译码电路的电路图和仿真 18
4总原理图 19
5小结 19
6元件清单 21
7参考文献 21
摘 要
在电子技术中，频率是最基本的参数之一，并且与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。数字频率计测频有两种方式：一是直接测频法，即在一定闸门时间内测量被测信号的脉冲个数；二是间接测频法，如周期测频法。直接测频法适用于高频信号的频率测量，间接测频法适用于低频信号的频率测量。 本文介绍了数字频率计的设计过程，并用EWB对电路进行了仿真。
Abstract
In electronic technology, the frequency is one of the most basic parameters, and the Senate, and many of the measurement, the measurement results have very close relations, so the frequency of measurements, it is much more important. Measuring the frequency of a number of means, including electronic counter measure the frequency with high precision, ease of use, rapid measurement, and to facilitate realization of the advantages of full automation of measurement, frequency measurement is one of the important means. Digital frequency of measuring frequency in two ways: First, direct measurement of the frequency, or within a certain time gates measuring the number of detected signals in pulses; Second, the frequency of indirect measurement, such as measuring the frequency of cycles. Direct Frequency Measurement Law is applicable to high-frequency signals in the frequency of measurements, indirect Frequency Measurement Law is applicable to low-frequency signals in the frequency of measurement. In this paper, digital frequency of the design process, with EWB and the simulation of the circuit.
目 录
摘 要 1
Abstract 2
1.方案比较 3
1.1方案一 数字频率计 3
1.2 方案二 由ICM7216D构成的单片数字频率计 4
2.实验原理 7
2.1 数字频率计的基本原理 7
2．2数字频率计的主要技术指标 8
2.2.1频率准确度 8
2.2.2频率测量范围 8
2.3各部分的作用及电路选择 8
2.3.1放大整形电路 8
2.3.2 时基电路 9
2.3.3 逻辑控制电路 11
2.3.4 锁存器 11
2.3.5计数器 12
2.3.6 译码电路 12
3 各部分电路仿真 14
3.1放大整形电路的电路图和仿真 14
3.2 时基电路的电路图和仿真 15
3.3 逻辑控制电路的电路图和仿真 16
3.4 计数器的电路图和仿真 17
3.5 译码电路的电路图和仿真 18
4总原理图 19
5小结 19
6元件清单 21
7参考文献 21
