Description: 在大功率DC/DC开关电源中,为了获得更大的功率，特别是为了得到大电流时，经常采用N个单元并联的方法。多个单元并联具有高可靠性，并能实现电路模块标准化等优点。然而在并联中遇到的主要问题就是电流不均，特别在加重负载时，会引起较为严重的后果。普通的均流方法是采取独立的PWM控制器的各个模块，通过电流采样反馈到PWM控制器的引脚FB或者引脚COMP，即反馈运放的输入或者输出脚来调节输出电压，从而达到均流的目的。显然，电流采样是一个关键问题：用电阻采样，损耗比较大，电流放大后畸变比较大；用电流传感器成本高；用电流互感器采样不是很方便，同时会使电流失真。本文提出了一种新型的、方便的、无损的电流采样方法，并在这种电流检测方法的基础上实现了并联系统的均流。 -in High Power DC/DC switching power supply, in order to gain more power, in particular in order to obtain the current, frequently using N units parallel method. Parallel number of modules with high reliability, and the circuit module can achieve the advantages of standardization. However, in parallel encountered in the current main problem is uneven, particularly in the heavier load, it will cause more serious consequences. The general flow is to have an independent PWM controller modules, Current sampling through feedback to the PWM controller pin FB pin or COMP. that feedback operational amplifier input or output pin to adjust the output voltage, thereby achieving both flow purposes. Clearly, the current sampling is a key question : sampling resistor, loss comparison, the amplifier dis Platform: |
Size: 12288 |
Author:duanshaochun |
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Description: 基于KEIL51的一款高性能的数字功放的完整代码，核心芯片用的是PT2322。-Based on KEIL51 of a high-performance digital power amplifier complete code, the core chip is used in PT2322. Platform: |
Size: 115712 |
Author:liudeng |
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Description: 大功率音频放大器的设计，基于低通滤波器，H桥PWM技术-High-power audio amplifier design, based on the low-pass filter, H bridge PWM technology Platform: |
Size: 3111936 |
Author:Yang hong |
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Description: OFDM高功率放大器.供学习matlab的同学交流学习
-The Matlab code investigates the harmful effects of high power amplifier on ofdm signals. It is imagined that the amplifier destroy the amplitude of the transmitted signal due to saturation and has no effect on the signal phase. The model is acceptable for solid state amplifier to some extend. Platform: |
Size: 2048 |
Author:天天 |
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Description: 本电路以LM3886芯片制作的一款高品质大功率功放板，资料中含有电路原理图和PCB板。制作完后音质效果很好。-LM3886 chips in the circuit produced a high-quality high-power amplifier board, the information contained in the circuit schematic and PCB board. After making a very good sound quality. Platform: |
Size: 3058688 |
Author:倚天 |
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Description: High Power Amplifier Modeling for TWTA(Traveling Wave Tube Amplifier) and SSPA (Solid-State Power Amplifier) Platform: |
Size: 1024 |
Author:Jin-kyu Hong |
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Description: The mfile investigates the effects of high power amplifier on the ofdam signals. The effects on spectrum ang Modulation Error Rate (MER) is of more concern.
-The mfile investigates the effects of high power amplifier on the ofdam signals. The effects on spectrum ang Modulation Error Rate (MER) is of more concern.
Platform: |
Size: 2048 |
Author:KJ |
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Description:
OFDM modulation produces higher Peak Average Power Ratio (PAPR) whenever the carriers in OFDM symbol add synchronously in the time domain resulting in higher signal power. This high power saturates the power amplifier placed in the RF section resulting higher bit error rate. To avoid this higher PAPR value the baseband IQ signal has to be pre-processed in the baseband before it is sent to RF Platform: |
Size: 545792 |
Author:keshava |
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Description: m-file调查高功率放大器的影响，channelnoise在ofdm信号，当时介绍卡由于一个paprreductionmethod减少hpa效果。-m-file investigation of high-power amplifier, channelnoise in ofdm signal, when introduced to reduce card due to a paprreductionmethod hpa effects. Platform: |
Size: 2048 |
Author:吴俊凡 |
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Description: The combination of the LM4651 driver IC and the LM4652
power MOSFET Class D power amplifier IC provides a high
efficiency amplifier solution, suitable for self-powered speakers,
subwoofers and quality car boosters Platform: |
Size: 88064 |
Author:Mario Marcos |
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Description: Quadrature ampliltude modulation has high spectral efficiency but is highly sensitive to power amplifier
nonlinearities. It is shown that an adaptive predistorter usig polynomial amplitude and phase
predistortion functions can be used to linearize the power amplifier. Tie recursive least square algonrthm
is employed in an estimator which uses demodulated signals to estimate the required predistortion.
Computer simulation results are provided and these results show that fast convergence and high spectm
improvement can be obtained using the proposed linearization method. The results are significantly
better than those reported before for other linearization techniques. Platform: |
Size: 2683904 |
Author:sali |
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Description: LC970A是一款大功率WiFi模块。针对远距离传输等应用，LC970A采用高集成度单芯片RT3070方案，
配合输出功率达27DBm/500mw的高性能外置PA（射频功率放大器）和低噪声放大器，可以显著提升WiFi
传输效能。配套合适天线，可以获得300-500米的通讯距离。
LC970A 软件驱动层面支持良好，可以在Windows/Linux/Android等多系统下稳定运行，不仅支持
station模式，而且可以工作在softap模式。此外，LC970A也可以良好支持smartconfig，smartlink，zerolink
等一键配置功能。
LC970A模块采用USB接口，方便客户直接连接电脑使用。-LC970A is a high power WiFi module for long-distance transmission. LC970A uses high integrated single chip RT3070, high-performance external PA with 27 dbm/500mw output power(RF power amplifier) and the low-noise amplifier, can significantly improve WiFi transmission efficiency and obtain 300-500 meters communication distance with appropriate antenna.
LC970A has a good software driver and can operate stably under Windows/Linux/Android system. It supports not only STA mode but also AP mode and it also supports one key configuration function such as smartconfig, smartlink, and zerolink. LC970A module uses USB interface for clients to connect computer directly. Platform: |
Size: 1042432 |
Author:张军 |
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Description: LC970B是一款专门针对网络摄像机设计的大功率WiFi模块。针对普通功率WiFi模块在视频传输等高
数据量，较远距离等应用场合性能受限制的问题，LC970B采用高集成度单芯片RT3070方案，配合输出
功率达27DBm/500mw的高性能外置PA（射频功率放大器），可以显著提升WiFi传输效能。
LC970B 软件驱动层面支持良好，可以在Windows/Linux/Android等多系统下稳定运行，不仅支持
station模式，而且可以工作在softap模式。此外，LC970B也可以良好支持smartconfig，smartlink，zerolink
等一键配置功能，可以广泛应用在家用网络摄像机产品中。
LC970B模块采用邮票口接口，方便客户直接表贴在产品电路板上，降低电路空间。-LC970B is a high power WiFi module specifically designed for network camera. As we all known the WiFi module with ordinary power is restricted in applications such as video transmission which need to transmit mass of data in long distance. LC970A uses high integrated single chip RT3070, high-performance external PA with 27 dbm/500mw output power(RF power amplifier) and the low-noise amplifier, can significantly improve WiFi transmission efficiency.
LC970A has a good software driver and can operate stably under Windows/Linux/Android system. It supports not only STA mode but also AP mode and it also supports one key configuration function such as smartconfig, smartlink, and zerolink, can be widely used in home network camera.
LC970B module uses stamps interface for clients to attached it to circuit board directly and save the space of the circuit. Platform: |
Size: 1062912 |
Author:张军 |
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