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相关概念视频

Voltage Doubler Circuit01:23

Voltage Doubler Circuit

441
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
441
Design Example: Vintage Mixing Console01:17

Design Example: Vintage Mixing Console

199
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
199
Second-order Op Amp Circuits01:19

Second-order Op Amp Circuits

229
Implementing second-order low-pass filters in audio systems is crucial in refining audio signals by eliminating undesirable high-frequency noise. These filters typically involve second-order op-amp circuits configured as voltage followers, encompassing two nodes with distinct storage elements.
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
229
MOSFET Amplifiers01:17

MOSFET Amplifiers

140
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
140
Cascaded Op Amps01:16

Cascaded Op Amps

571
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
571
Full wave rectifier01:22

Full wave rectifier

735
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
735

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相关实验视频

Updated: May 25, 2025

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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2W HBT功率放大器模块具有双秒波抑制技术.

Chul-Woo Byeon1, Joon-Hyung Kim2

  • 1School of Electronics and Electrical Engineering, College of Engineering, Dankook University, Yongin-si 16890, Republic of Korea.

Sensors (Basel, Switzerland)
|February 26, 2025
PubMed
概括

本研究介绍了GSM/EDGE的高功率异极连接双极晶体管 (HBT) 功率放大器 (PA) 模块,实现高输出功率和效率. 新的设计增强了移动通信应用程序的线性和性能.

关键词:
异极连接双极晶体管 (HBT) 是一种双极晶体管.这就是线性线性.功率放大器 (PA) 的功率放大器增加功率的效率 (PAE)

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科学领域:

  • 电气工程 电气工程
  • 半导体设备 半导体设备
  • 无线通信无线通信

背景情况:

  • 高功率放大器对于GSM/EDGE等移动通信系统至关重要.
  • 现有的功率放大器设计在低供应电压下实现高效率和线性方面面临挑战.
  • 异极连接双极晶体管 (HBT) 为高性能功率放大提供了潜力.

研究的目的:

  • 为GSM/EDGE应用设计和展示一个高功率的异质连接双极晶体管 (HBT) 功率放大器 (PA) 模块.
  • 在低供应电压下实现高输出功率和功率增加效率 (PAE).
  • 为了提高在宽带宽的线性,而没有复杂的和终结.

主要方法:

  • 使用差异输出阶段HBT功率放大器设计.
  • 实现了一个基于变压器的输出匹配网络,以组合差异信号.
  • 优化了变压器中心水龙头上的电容值,以提高线性.
  • 集成了PA与低通波器和天线开关,以提高模块性能.

主要成果:

  • 在GSM模式下实现了36dBm的输出功率,PAE>40%在GSM模式下.
  • 在EDGE模式下提供28.5dBm的输出功率,PAE>20%.
  • 在EDGE模式下,在400kHz的偏移下达到 -60dBc的相邻通道功率比.

结论:

  • 拟议的HBT PA模块有效地满足了GSM/EDGE应用程序的苛刻要求.
  • 差异输出阶段和基于变压器的匹配网络为高功率高效放大提供了强大的解决方案.
  • 该设计表现出极好的线性和光谱纯度,这对于现代无线通信标准至关重要.