论高频电路的频谱线性搬移

字数:11635,页数:25  附任务书,电子机电论文开题报告

目  录
摘要 ...................................................................2
第一章 高频电路频谱线性搬移电路的调制 ..................................3
1.1 调制的概述 .........................................................3
第二章调幅信号分析.................................................... 4
2.1调幅波的表达式...................................................... 4
2.2调幅信号的频谱...................................................... 5
2.3调幅信号的功率分配 ..................................................6
2.4双边带信号.......................................................... 7
第三章调幅电路........................................................ 9
3、1一般调幅电路 .......................................................9
3.2双边带调幅电路 ......................................................11
3.3 单边带调幅....................................................... ..13
第四章检波器原理及电路................................................. 15
4.1概述................................................................ 15
4.2 大信号包络检波.................................................... .15
4.3 小信号平方率检波 ...................................................16
4.4 同步检波 ...........................................................16
第五章  混频器原理及电路 ...............................................19
5.1 混频器的作用 .......................................................19
5.2 混频器的干扰 .......................................................19
5.3 互相调制干扰 .......................................................20
5.4 阻塞干扰 ...........................................................20
致谢 ...................................................................22
参考文献............................................................... 23

摘    要

     在高频电路的频谱线性搬移中最常见的混频器是晶体管混频器，器输入信号为有用信号和本真信号一般来说本真信号较大，有用信号的幅值较小。对有用信号而言，混频器可视为线性时便电路，可以时便参数的小信号模型进行分析。利用模拟乘法器的相乘特性能够方便的实现混频。在混频过程中会产生组合频率干扰、交调干扰、互调干扰等抑制干扰的主要方法是提高前节的选择性，以及调整混频器的工作状态并真确选择偏压、信号电压和本真电压的大小。
关键词：电路、混频器的原理及电路、混频器 

By high-frequency circuit frequency spectrum linear removal
Yan Mao
0301 Electron
Abstract：In the high-frequency circuit frequency spectrum linear removal the most common mixer is the transistor mixer, the input signal is big for the useful signal and the candid signal generally speaking candid signal, the useful signal peak-to-peak value is small. Speaking of the useful signal, the mixer may regard as when the linearity then the electric circuit, may when then the parameter small signal model carries on the analysis.Using simulates the realization mixing which the multiplier the multiplication characteristic can facilitate. Can have suppression disturbance and so on combination frequencies disturbance, beat interference, intermodulation interference in the mixing process main methods is enhances the initial segment the selectivity, as well as adjustment mixer active status and authentic choice bias, signal voltage and candid voltage size.
Keywords: Electric circuit； mixer principle and electric circuit；mixer