摘要
在当前的许多电子产品中,功率放大器必不可少。本文介绍了一款应用于电子测试仪器中的宽带线性功率放大器及其稳幅电路的设计。放大器的工作频率从250ｋＨｚ到1ＧＨｚ,输入信号功率为0ｄＢｍ±1.5ｄＢ,输出功率为18ｄＢｍ±2ｄＢ。该功放系统从功能上主要分为电调衰减部分、ＲＦ信号放大部分、自动增益控制部分(检波和直流放大),本文分别详细介绍了这几个部分的原理和电路。
Nowadays, the power amplifier is very important in many electronic products. This article describes a system of power amplifier and its AGC (auto gain control) circuit in detail. This system is applied in electronic test instrument. Its operating frequency is from 250kHz to 1GHz, and the input power is 0dBm±1.5dB, the output power is 18dBm±2dB. The power amplifier system in function is divided into adjustable attenuation (PIN diode), RF amplifier , auto gain control (detector and DC amplifier). The principles and circuits of these functional units are introduced in detail in this article.
出处
《国外电子测量技术》
2005年第4期15-17,共3页
Foreign Electronic Measurement Technology
