Description: 采用BH1417调频广播发射机是一种新型的广播信号发射机，特点是 (1) 采用了频率合成，频率稳定，可调
整范围宽。 (2) 采用了红外线遥控调整频率方便。 (3) 采用了高性能的立体声专用芯片，音质好，分离度高。 (4) 采用了宽带功放，整机的频率范围 30MHz---450MHz. 用途 ：广泛应用于学校的英语听力发射，和学校试验用信号源，也可用于组建大型会场的广播系统。设计要求采用单片机为控制平台能在88—108MHz范围内改变发射频率，并显示发射机的发射载波频率。发生距离不少于1公里。
-BH1417 FM radio transmitter used is a new kind of radio signal transmitter, characterized by (1) adopted a frequency synthesizer, frequency stability and adjustable range. (2) adjust the frequency of the infrared remote control convenience. (3) use of high-performance ASIC stereo, good sound quality, separation is high. (4) use of broadband power amplifier, whole frequency range of 30MHz-450MHz. Usage: widely used in school English Listening fired, and school test signal source, can also be used for the formation of large-scale broadcasting system in the venue. Design requirements for the control of the use of single-chip platform in the 88-108MHz frequency range of changes in the launch and display the launch carrier frequency transmitter. The occurrence of not less than 1 km distance. Platform: |
Size: 198656 |
Author:王曦帆 |
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Description: 摘要：应用CXA1019S芯片完成接收机混频、中放、解调等的设计，并用芯片BU2614以PLL
频率合成的方法产生稳定的本振和控制输入调谐回路的谐振频率，从而实现电调谐。单片机采用
MCS-51系列对频率合成器BU2614进行控制，加上键盘、显示和存储器电路，可实现多种程控搜
索、电台存储等功能。-Abstract: The complete receiver chip CXA1019S mixer, amplifier, demodulator, such as design, and BU2614 chip PLL frequency synthesizer to generate a stable method of vibration and control input of the tuner circuit resonant frequency, in order to achieve electrical tuning. Singlechip using MCS-51 series of the frequency synthesizer BU2614 control, together with the keyboard, display and memory circuits, can achieve a variety of program-controlled search, radio storage functions. Platform: |
Size: 173056 |
Author:谢运军 |
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Description: 数字控制振荡器（NCO，numerical controlled oscillator）是软件无线电、直接数据频
率合成器（DDS，Direct digital synthesizer）、快速傅立叶变换（FFT，Fast Fourier Transform）
等的重要组成部分，同时也是决定其性能的主要因素之一，随着芯片集成度的提高、在信号
处理、数字通信领域、调制解调、变频调速、制导控制、电力电子等方面得到越来越广泛的
应用。-Digital controlled oscillator (NCO, numerical controlled oscillator) is a software-defined radio, direct data on the frequency synthesizer (DDS, Direct digital synthesizer), Fast Fourier Transform (FFT, Fast Fourier Transform), such as an important component of the decision at the same time the performance of one of the main factors, along with the improvement of the chip integrated in the signal processing, digital communications, modulation and demodulation, frequency conversion speed control, guidance control, such as power electronics get more and more widely. Platform: |
Size: 4096 |
Author:司令 |
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Description: 该IC利用的无线频率范围是ISM频带的5.790G～5.840GHz。采用FSK调制方式。集成有上行转换混频器、缓冲器及预驱动器放大器、Fractional-N型（分数型锁相型）频率合成器等-The use of radio frequency IC is the ISM band 5.790G ~ 5.840GHz. Using FSK modulation. Integrated upconverter mixer, buffer and pre-driver amplifier, Fractional-N type (fractional PLL) frequency synthesizer Platform: |
Size: 481280 |
Author:萧和 |
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Description: 本调频收音机主要由FM/AM收音机芯片CXA1019、PLL且频率合成器BU2614和单片机AT98C51组成。收音机以单片机AT98C51为控制核心, 实现全频搜索、指定频率范围搜索和手动搜索电台 本收音机还使用了数字电位器(X9511)控制音量。采用液晶显示器显示载频和时钟等信息, 大幅度降低了系统的功耗。整机实现3V 电源工作, 采用E2PROM(AT24C04)存储电台, 还增加了立体声解码功能。-Mainly by the FM radio FM/AM radio IC CXA1019, PLL and frequency synthesizer BU2614 and SCM AT98C51 composition. AT98C51 microcontroller for the control of the radio to the core, to achieve full frequency search, specify the frequency range of search and manual search radio station the radio also uses a digital potentiometer (X9511) to control the volume. Carrier frequency with LCD display and clock and other information, significantly reducing system power consumption. Machine to achieve 3V supply, the use of E2PROM (AT24C04) storage station, also increased the stereo decoding. Platform: |
Size: 320512 |
Author:梁蛟龙 |
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Description: nRF24.L01是一款新型单片射频收发器件,工作于2.4 GHz～2.5 GHz ISM频段。内置频率合成器、功率放大器、晶体振荡器、调制器等功能模块,并融合了增强型ShockBurst技术，其中输出功率和通信频道可通过程序进行配置。nRF24L01功耗低,在以-6 dBm的功率发射时，工作电流也只有9 mA 接收时，工作电流只有12.3 mA，多种低功率工作模式(掉电模式和空闲模式)使节能设计更方便。
-nRF24.L01 is a new single-chip radio transceiver device operating in the 2.4 GHz ~ 2.5 GHz ISM band. Built-in frequency synthesizer, power amplifier, crystal oscillator, modulator and other functional modules, and integration of the enhanced ShockBurst technology, in which the output power and communication channels can be configured by the program. nRF24L01 low power consumption, in order to-6 dBm launch power, operating current is only 9 mA received, the operating current of only 12.3 mA, a variety of low-power mode (power-down mode and Idle mode) to more convenient energy-saving design . Platform: |
Size: 9216 |
Author:蔺伟涛 |
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Description: 调频接收机（FM Radio）一直在人们的生活娱乐中占有非常重要的地位，从老式的晶体管收音机到今天的网络收音机，诸如MP3、智能手机、便携式Video播放器等产品中嵌入FM部分。基于FM Radio的广泛应用，本设计主要研究利用单片机实现接收的智能控制。利用所学的高频知识和单片机知识，通过硬件、软件两方面的设计实现功能。- According to the demand of my design,I utilized the digital frequency
Synthesizing technology to form the electric parts of the frequency modulatiom receiver.This receiver owns the functions of tuning and selecting channel,seaching and so on,In my paper,I emphasized on the FM
Frequency tuning circuit that consists of the ICs CXA1019S from Sony
Corp,the phase locking loop circuit formed by BU2614 PLL frequency synthesizer,MCS51 monolithic processor and the other circuits of keyboards,screen and storage.
Platform: |
Size: 34816 |
Author:吴旺军 |
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Description: 频率合成高频头控制代码，应用于高频头制作选台器，收音机的方面。-Frequency synthesizer tuner control code used in high-frequency head production tuner radio. Platform: |
Size: 31744 |
Author:殷荣华 |
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Description: nco的产生原理的相关代码；软件无线电、直接数据频 率合成器（DDS，Direct digital synthesizer）、快速傅立叶变换（FFT，Fast Fourier Transform） 等的重要组成部分，同时也是决定其性能的主要因素之一，用于产生可控的正弦波或余弦波。随着芯片集成度的提高、在信号 处理、数字通信领域、调制解调、变频调速、制导控制、电力电子等方面得到越来越广泛的应用-nco the generation principle of the relevant code software radio, direct data frequency synthesizer (DDS, Direct digital synthesizer), Fast Fourier Transform (FFT, Fast Fourier Transform) and other important component, but also determine the performance of the main factors , controllable for generating a sine wave or cosine wave. With the improvement of chip integration, in signal processing, digital communications, modulation and demodulation, frequency control, guidance and control, power electronics, etc. to be more widely applied Platform: |
Size: 1024 |
Author:李毅 |
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