-
在电子技术中，频率是最基本的参数之一，又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...
在电子技术中，频率是最基本的参数之一，又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。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct
- 2022-04-18 19:56:54下载
- 积分：1
-
为了便于我们分析和识别电路，更好的理解555电路，这里我们这里按555电路的结构特点进行分类和归纳，把555电路分为3大类、8种、共18个单元电路。...
为了便于我们分析和识别电路，更好的理解555电路，这里我们这里按555电路的结构特点进行分类和归纳，把555电路分为3大类、8种、共18个单元电路。-In order to facilitate our analysis and the identification circuit, a better understanding of circuit 555, here we are here by the structural characteristics of the circuit 555 classified and summarized in the circuit 555 is divided into 3 broad categories, eight kinds, a total of 18 unit circuit.
- 2022-04-25 08:07:34下载
- 积分：1
-
This text surrounds the development of the electric power SCADA system exactly,...
This text surrounds the development of the electric power SCADA system exactly, aiming at the present condition of the our country electric power charged barbed wire net currently, according to the oneself at the e- lectric power protect the profession after the electricity in seven years of development, design and adjust to try the experience on the scene from following severals carry on the treatise:Is the emergence to the system of SC- ADA and developments to introduce first Carry on the introduction elucidation to applied present condition and the development foregrounds of various terminal equipments communication agreement(rules invite) the next in order Then is the elucidation to the windows the bottom according to the mfc the plait distance environment an- d VC++6.0 plait distance softwares Carry on the more detailed treatise to the realization of the procedure struct- ure frame and the source code again End is the applied case example give examples.-This text surrounds the dev
- 2022-04-07 10:10:30下载
- 积分：1
-
基于换乘次数优先的公交路线选择模型
2007年B题论文
基于换乘次数优先的公交路线选择模型
2007年B题论文-Change based on the number of priority bus route choice model in 2007 Thesis title B
- 2022-11-20 18:00:03下载
- 积分：1
-
在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文...
在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案-The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program
- 2022-10-28 01:20:03下载
- 积分：1
-
刚刚找到的USB开发的资料，感觉写的很好，共享给大家。
刚刚找到的USB开发的资料，感觉写的很好，共享给大家。-have just found the USB development of the information, the feeling was good for everyone to share.
- 2022-09-22 08:55:04下载
- 积分：1
-
AVRcam Release v1.4 for robotics
AVRcam Release v1.4 for robotics
- 2023-09-06 13:35:03下载
- 积分：1
-
On the Hardware Implementation of the
MUGI Pseudorandom Number Generator
On the Hardware Implementation of the
MUGI Pseudorandom Number Generator
- 2022-02-02 01:16:08下载
- 积分：1
-
P2P流媒体传输 P2P技术 P2P系统架构 论文
P2P流媒体传输 P2P技术 P2P系统架构 论文-P2P streaming media transmission P2P Technology P2P system architecture thesis
- 2022-07-27 17:09:25下载
- 积分：1
-
USB 1.1 协议详简，对做usb 开发的 可以好好看看。
USB 1.1 协议详简，对做usb 开发的 可以好好看看。
-USB 1.1 protocol detailed briefing on the development of the so usb be a good look.
- 2022-01-28 08:23:33下载
- 积分：1
