摘要
介绍了基于采用分立元件设计的LC谐振放大器的设计方案与实现电路,可用于通信接收机的前端电路,主要由衰减器、谐振放大器、AGC电路以及电源电路四部分组成。通过合理分配各级增益和多种措施提高抗干扰性,抑制噪声,具有中心频率容易调整、稳定性高的特点。电路经实际电路测试表明具有低功耗、高增益和较好的选择性。
Based on the design and implementation using discrete components of the LC resonance amplifier circuit can be used for the front end circuit of the communication receiver, mainly by the attenuator, the resonance amplifier, AGC circuit, and a power supply circuit is composed of four parts. Through the rational allocation of gain at all levels and a variety of measures to improve the anti-interference, noise suppression, easy to adjust the center frequency, high stability characteristics. Circuit by actual circuit test that has a low-power, high gain and good selectivity.
出处
《电子设计工程》
2013年第5期176-179,共4页
Electronic Design Engineering
关键词
谐振放大器
选频
自激
AGC电路
resonance amplifier
frequency selection
self-excited
AGC circuit
