varactor

简明释义

英[ˈveəˌræktə(r)]美[vəˈræktər]

n. 变抗器；变容二极管

英英释义

单词用法

同义词

反义词

例句

1.The required pumping power can be greatly reduced if a varactor having much higher nonlinearity is employed.

提高变容管的非线性度，在应用中可以相应减小注入功率。

2.The main production and sales varactor diode and integrated circuit IC.

主要生产销售变容二极管和集成电路ic。

3.A theoretical model of waveguide microwave limiter with Varactor Diodes is discussed.

本文讨论变容管微波限幅器的理论模型。

4.Design and phase noise analysis of a MEMS varactor is presented.

给出了一种MEMS压控电容的设计和相位噪声分析结果。

5.Only one external transistor is required for varactor-line driving.

只有一个外部晶体管所需的变容二极管，线路驱动。

6.Then based on this design, varactor diode is adopted in the reconfigurable antenna, and continuous alteration of antenna pattern and gain is achieved.

接着以此为基础，将变容二极管用于方向图可重构天线的设计，实现了天线方向图和增益的连续可调。

7.A varactor can be used in voltage-controlled oscillators for better performance.

在电压控制振荡器中使用变容二极管可以获得更好的性能。

8.The radio frequency circuit uses a varactor to tune the signal.

无线电频率电路使用一个变容二极管来调谐信号。

9.In this application, the varactor helps to stabilize the oscillator frequency.

在这个应用中，变容二极管有助于稳定振荡器频率。

10.Engineers often select a varactor based on its capacitance range.

工程师通常根据其电容范围选择变容二极管。

11.The design of the RF amplifier includes a varactor for tuning purposes.

RF放大器的设计包括一个用于调谐目的的变容二极管。

作文

The world of electronics is filled with fascinating components, each serving a unique purpose in the functioning of devices we use every day. One such component is the varactor, which plays a crucial role in tuning circuits and frequency modulation. A varactor (可变电容二极管) is a type of diode that exploits the voltage-dependent capacitance of a reverse-biased p-n junction. Unlike regular diodes that are used primarily for rectification, varactors are specifically designed to act as variable capacitors, which makes them invaluable in many applications.In radio frequency (RF) applications, varactors are often used in voltage-controlled oscillators (VCOs). These oscillators generate signals at specific frequencies and can be adjusted by changing the voltage applied to the varactor. This ability to tune frequencies is essential in devices like radios, where different stations operate on different frequencies. By varying the voltage, the capacitance of the varactor changes, allowing the circuit to select the desired frequency. This function is particularly important in modern communication systems, where precise frequency control is necessary for clear signal transmission.Another significant application of varactors is in phase-locked loops (PLLs). PLLs are used in various electronic systems to synchronize frequencies. The varactor within a PLL helps maintain the desired phase relationship between the input and output signals. This capability is critical in applications ranging from telecommunications to video broadcasting, where maintaining a stable frequency is paramount.Moreover, varactors are also utilized in television tuners and other devices that require frequency selection. In these scenarios, the varactor allows the tuner to lock onto a specific channel by adjusting its capacitance based on the control voltage. This feature enhances the user experience by enabling quick and accurate channel selection.Despite their advantages, working with varactors requires careful consideration of several factors. For instance, the quality factor (Q factor) of a varactor significantly influences its performance in RF applications. A higher Q factor indicates lower energy losses, which is desirable for efficient operation. Additionally, the temperature sensitivity of varactors must be taken into account, as variations in temperature can affect their capacitance and, consequently, the performance of the entire circuit.In conclusion, the varactor (可变电容二极管) is a vital component in the realm of electronics, facilitating frequency tuning and modulation in various devices. Its unique properties allow it to function as a variable capacitor, making it indispensable in RF applications, PLLs, and television tuners. As technology continues to evolve, the importance of varactors will only grow, underscoring the need for a deeper understanding of this remarkable electronic component. Whether in communication systems or consumer electronics, the varactor remains a key player in ensuring efficient and effective electronic performance.

电子世界充满了迷人的组件，每个组件在我们日常使用的设备中都发挥着独特的作用。一个这样的组件是varactor，它在调谐电路和频率调制中发挥着至关重要的作用。varactor（可变电容二极管）是一种利用反向偏置p-n结的电压依赖电容特性的二极管。与主要用于整流的普通二极管不同，varactors专门设计为可变电容器，这使它们在许多应用中不可或缺。在射频（RF）应用中，varactors通常用于电压控制振荡器（VCO）。这些振荡器生成特定频率的信号，并可以通过改变施加在varactor上的电压来调整。这种调谐频率的能力在收音机等设备中至关重要，因为不同的电台在不同的频率上运行。通过改变电压，varactor的电容发生变化，从而允许电路选择所需的频率。这一功能在现代通信系统中尤为重要，因为清晰信号传输需要精确的频率控制。varactors的另一个重要应用是在锁相环（PLL）中。PLL被用于各种电子系统中以同步频率。varactor在PLL中帮助维持输入和输出信号之间的期望相位关系。这一能力在电信到视频广播等应用中至关重要，在这些应用中，保持稳定的频率是至关重要的。此外，varactors还被用于电视调谐器和其他需要频率选择的设备。在这些情况下，varactor通过根据控制电压调整其电容，允许调谐器锁定到特定频道。这一特性通过实现快速和准确的频道选择来增强用户体验。尽管有其优点，但使用varactors需要仔细考虑几个因素。例如，varactor的品质因数（Q因数）显著影响其在RF应用中的性能。较高的Q因数表明能量损失较低，这是有效操作所期望的。此外，必须考虑varactors的温度敏感性，因为温度变化可能会影响其电容，从而影响整个电路的性能。总之，varactor（可变电容二极管）是电子领域的重要组成部分，促进了各种设备中的频率调谐和调制。它的独特特性使其能够作为可变电容器，从而在RF应用、PLL和电视调谐器中不可或缺。随着技术的不断发展，varactors的重要性只会增加，这突显了深入了解这一卓越电子组件的必要性。无论是在通信系统还是消费电子产品中，varactor始终是确保电子性能高效和有效的关键角色。