电子电路分析与设计electriccircuitanalysisanddesign

电子电路分析与设计electric circuit analysis and design

comprehensive application of analog and digital circuit

理论部分

前向通道设计forward path design

传感器sensor

应变片strain gauge

光敏电阻photoresistance

整流电路

有源滤波器active power filter

比无源滤波器好在：passive filter输出阻抗低 low output resistance能够提供一定增益 can offer amplification便于级联 easy to combined to form higher order filter

高通低通带通带阻HPF LPF BDF BEF

压控型比有源二阶滤波器好在，中心频率处增益可调

A/D

控制器设计controller design

FPGAlogic gate array

主频50MHZ并行parallel速度快speed is high使用硬件语言 VHDL

Altera Quartus II

后向通道设计backward path design

D/A

功放电路power amplification circuit

JBT 功率三极管Bipolar Junction Transistor

晶闸管thyristor／SCR

DC motor control

H bridge

PWM control

LM298

抗干扰 anti-interference

滤波filter

去耦decoupling capacitor

共模扼流圈common mode choke

屏蔽shield

分离强电、弱电separate strong／weak current分离数电、模电separate analog／digital circuit

实验部分

电子称实验electronic scale‘s experiment

悬臂梁——应变片——桥电路——仪用放大INA128——增益调整电路——电压表cantilever——strain gauge——bridge—— instrument amplifier——amplification adjust circuit——volt meter

测量特性曲线measure characteristics curve

位移传感器实验displacement sensor experiment

电路设计

1、位移与电感成正比displacement in proportion to inductance2、输出电压与电感成正比output voltage in proportional to inductance

变压式位移传感器 transformer displacement transducer

波形发生 sine wave generator功放电路 power amplification circuit精密整流 rectification circuit滤波 filtering circuit差分放大 differential amplification circuit整定电路 setting circuitA/D 0～3.3VFPGAD／A

焊接电路板PCB welding

软件设计

已有从A/D到数码管显示程序，需改为用LED显示already have the program which from A/D to nixie tube displaywhat i have to do is to change it use LED screen to display

after we get the value of AD16 BCD codefirst 4 bit is sign bit next is A／D resultlook up the tablefind the character that should be displayed