The phase-locked loop band-pass filter and the logarithmic amplifier is adopted in the circuit to insure the reliability of receiving signal. 电路中采用锁相带通滤波器和对数放大器,保证有效信号的可靠接收。
The paper introduces a method of baseband remote transmission for digital singal realized by making digital signal amplified by band-pass filter, enhancing power and driving ability by audio power amplifier, and using low frequency component being filtered by the low-pass filter. 介绍了硬件方面采用带通放大器实现对数字信号的放大、通过音频功放提高功率和驱动能力,通过低通滤波技术以及利用音频变压器隔离总线,实现了数字信号的基带远程传输。
The variable center frequency band-pass filter is designed by optimization technique and one-pole roll-off model is used to deal with the operation amplifier of the filter. 本文采用单极点转移模型处理运算放大器,应用最优化方法对可变中心频率带通滤波器进行了设计。
Exciting magnetism, multi-band, band-pass amplifier, phase-sensitive detector, the part of integral and feedback and compensation of temperature and so on comprise the design of circuit. 电路设计则由激磁和倍频、选频放大、相敏检波和积分环节、反馈环节及温度补偿等电路组成。