Location:
Search - modem circuit
Search list
Description: Modem电路图-Modem circuit
Platform: |
Size: 20480 |
Author: 胡正新 |
Hits:
Description: 73K222AL单片式调制解调器与单片机的接口电路.包含文档说明、电路、源代码。-linking 73K222AL monolithic modems and microcontroller interface circuit. Includes document shows that circuit, the source code.
Platform: |
Size: 60416 |
Author: haichuan |
Hits:
Description: 本文介绍了西门子的GSM 无线通信模块TC35i，并提出了由TC35i 模块通过搭建外围电路构成一个GSM Modem，PC机通过串口数据线向其发送 AT指令，从而实现短消息的发送和接收。详细介绍了TC35i的外围电路设计，给出了实际的电路连接图，并介绍了通过PC机给TC35i写AT指令从而实现收发短消息的过程。-This paper introduces the Siemens GSM wireless communication module TC35i, and TC35i module by the external circuit through the structures constitute a GSM Modem, PC machine through the serial data line to send AT commands, in order to achieve short message sending and receiving. TC35i described in detail the external circuit design, given the actual connection graph of the circuit and through the introduction of the PC-to TC35i write AT command in order to realize发短消息admission process.
Platform: |
Size: 686080 |
Author: 游游 |
Hits:
Description: 利用调制解调芯片MSB7512B，两个MCS-51单片机实现远程通信的源程序。详细电路图请参阅中国水利水电出版社出版的作者的教材＜＜单片机接口技术（C51版）-Use of modem chips MSB7512B, two MCS-51 single-chip remote communication of the source. Detailed circuit diagram please refer to the Chinese Water Conservancy and Hydropower Publishing House of the author
Platform: |
Size: 3072 |
Author: 张三三 |
Hits:
Description: 电路原理图 protel99se 把gps 的数据机收进来通过gprs 送到监控中心 这是原理图-Circuit schematic Protel99SE to close gps modem gprs to come in through the Control Center This is the schematic diagram
Platform: |
Size: 30720 |
Author: hegaofen |
Hits:
Description: ADSL 接入技术已成为终端用户最主要的宽带接入技术。ADSL 技术的关键是ADSL 调制解调器,即ADSL
MODEM。ADSL 用户端调制解调器驱动器是一个宽频带功率放大器,他能不失真放大和传输电话线上已编码的数字信号。
本文通过对ADSL 调制解调器驱动器特点、结构和性能的分析,给出了一种ADSL 用户端MODEM 驱动器的实现电路。该
电路采用具有优良高频的双功率放大器L T1886 ,即使在配置高电平的闭环增益网络后也能保持较低的失真。-ADSL access technology has become the most important end-user broadband access technology. ADSL technology is the key to ADSL modem, that is, ADSLMODEM. ADSL modem client driver is a broadband power amplifier, the distortion that he can not enlarge and transfer telephone lines have been encoded digital signal. Based on the ADSL modem driver characteristics, structure and performance analysis, we give a ADSL client realize MODEM driver circuit. The circuit has an excellent high-frequency power amplifier of the dual-L T1886, even though high in the configuration of the closed-loop gain network also able to maintain low distortion.
Platform: |
Size: 206848 |
Author: 大蜜蜂 |
Hits:
Description: FSK/PSK调制顶层文件
，正弦波模块
，正弦波模块初始化文件
，振幅调整及波形选择模块
，频率显示值地址产生模块
，频率步进键核心模块
，弹跳消除电路-FSK/PSK modulation top-level documents, sine-wave modules, module initialization file sine wave, amplitude adjustment and waveform selection module, the frequency of the displayed value address generator module, the frequency of stepping key core modules, bouncing the elimination of circuit
Platform: |
Size: 27648 |
Author: libing |
Hits:
Description: 73K222AL单芯片调制解调器与单片机的接口电路-73K222AL single-chip modem with MCU interface circuit
Platform: |
Size: 138240 |
Author: abel |
Hits:
Description: 单片机设计的遥控电路，遥控码的脉宽数用红外线接收器解码后送单片机读入，发射时由单片机产生40KHZ红外调制信号送红外线发射管发射-Single-chip design of the remote control circuit, remote control code number of the pulse width decoder using infra-red receiver to read single-chip evacuation, launch generated by single-chip modem 40KHZ IR signal sent to the launch tube fired infra-red.
Platform: |
Size: 1024 |
Author: 古儿 |
Hits:
Description: PCM编码把模拟信号转换为数字编码，在通信电路的目的地，脉冲调制解调器将二进制的数字编码重新转换成那些在调制器中有相同量子水平的脉冲。-PCM encoding to convert analog signals to digital encoding, the destination of the communication circuit, the binary pulse modem re-converted into digital code modulator in which the quantum level of the same pulse.
Platform: |
Size: 3072 |
Author: 蔡晓 |
Hits:
Description: 本系统设计是采用飞利溥公司推出的一款高度整合的家庭自动化专用电源调制解调芯片TDA5051A，通过电路信号收发系统送到电力网传输的典型应用电路系统。-The system design is the use of fly-li-po company launched a highly integrated dedicated power supply of the home automation modem chip TDA5051A, send and receive signals through the circuit to the power grid system, transmission system, a typical application circuit.
Platform: |
Size: 215040 |
Author: 黄增华 |
Hits:
Description: msp430f149 实现modem数据采集传输的通讯系统的设计
电路图和程序
串口通信 复位监控
modem】
-msp430f149 to achieve modem data collection and transmission of the communication system design and procedures for serial communication circuit Reset Monitor
Platform: |
Size: 21504 |
Author: JEFF |
Hits:
Description: This program is for beginners...Its basic NULL modem program to understand the concept behind NULL modem.before executing short circuit the rs 232 port 1 and 2 for transmission ogf messages
Platform: |
Size: 1024 |
Author: lk |
Hits:
Description: 利用TAPI函数建立拨打电话，程序实现的主要功能有：初始化线路、TAPI版本协商、获取MODEM图标、打开线路、传出呼叫电话、挂断呼叫、关闭线路、配置地址、配置MOdem
属性-Phone calls using TAPI functions to establish the program to achieve the main functions are: initialization circuit, TAPI version of the consultation, access to MODEM icon to open the lines, outgoing phone calls, hang up calls, close line, configure the address, configure MOdem property
Platform: |
Size: 3886080 |
Author: 陈莉莉 |
Hits:
Description: proteldxp常用封装数据库，可供电路板设计中应用-proteldxp popular database packages available for the application of the circuit board design
Platform: |
Size: 312320 |
Author: guan |
Hits:
Description: 本文首先研究可4一DQPsK调制解调系统中调制部分的基本原理和各个模块的设计方案，重点研究成形滤波器和直接数字频率合成器 (DireetoigitalFrequeneySynihesis，简称DDS)，并针对各个关键模块算法进行matlab设计仿真，展示仿真结果。其次，研究调制解调系统解调部分的基本原理和各个模块的设计方案，重点研究差分解调，数字下变频和位同步算法，也针对其各个关键模块进行算法的Matlab设计仿真。然后用Matlab对整个系统进行理论仿真，得出结论。在此基础
上，采用超高速集成电路硬件描述语言(VeryHighspeedxntegatedeireuitHardware
DescriptionLan即age，简称VHDL)在Altera公司 Quartusll7.0开发环境下设计并实现各个功能块，通过仿真来证明功能正确性。再次，用 Protel99SE进行印制电路板(Prinicircuitboard，简称PcB)设计，从原理图到封装，再到布局布线。焊接调试完毕后，将设计好的程序下载至FPGA主芯片。最后观察信号时域波形、星座图、眼图。本系统信源输入符号速率100kbPs，调制中频10MHz。测试结果验证系统的正确性，实现了从数字基带到中频的可4一DQPSK调制解调系统-This study is the first 4 1 DQPsK modem modulation system, part of the basic principles and design of each module, focusing on shaping filter and a direct digital frequency synthesizer (DireetoigitalFrequeneySynihesis, referred to as DDS), and to address all the key modules algorithm matlab design simulation to show simulation results. Second, the study of modulation and demodulation system demodulation part of the basic principles and design of each module, focusing on differential demodulation, digital down conversion and bit synchronization algorithm, but also for its various key module of the Matlab algorithm design and simulation. Then use the Matlab simulation of the entire system theory, reach a conclusion. On this basis,
, Using ultra-high speed integrated circuit hardware description language (VeryHighspeedxntegatedeireuitHardware
DescriptionLan that age, referred to as VHDL) in the Altera Corporation Quartusll7.0 development environment to design and implement the variou
Platform: |
Size: 5457920 |
Author: cai |
Hits:
Description: MODEM线路初始化,包括速率设置,工作模式,是否采用纠错编码方式等-MODEM circuit initialization, including rate setting, operation mode, whether using error correction coding, etc.
Platform: |
Size: 3072 |
Author: liyong |
Hits:
Description: sim300 gsm modem circuit
Platform: |
Size: 3072 |
Author: murugesh |
Hits:
Description: sim300 gsm modem circuit
Platform: |
Size: 3072 |
Author: murugesh |
Hits:
Description: 本课程设计主要运用MATLAB集成环境下的Simulink仿真平台设计一个AM调制与非相干解调系统，并把运行仿真结果输入到显示器，根据显示结果分析所设计的系统性能。在课程设计中，首先根据原理构建调制解调电路，再在Simulink中调出各元件组成电路，再设置调制解调电路中各个模块的参数值并加以运行，并把运行仿真结果输入显示器，根据显示结果分析所设置的系统性能。-This course is designed primarily integrated environment using MATLAB Simulink simulation platform design an AM modulation with non-coherent demodulation system, and to run the simulation result is input to the monitor, display the results analyzed according to the design of system performance. In the course design, the first modem circuit constructed according to the principle, and then tune in Simulink components of each circuit, and then set the modulation and demodulation circuit parameter values of each module and to run, and to run the simulation result input displays, according to Showing results analyzed set system performance.
Platform: |
Size: 618496 |
Author: 吴丹 |
Hits: