第三次高频电子线路小班课Pspice电路仿真实验报告此处为校徽研究题目:串并联振荡电路分析班级:电子信息工程1402班组别:第六组组员:***:主讲人***:仿真运行***:PPT制作***:文档整理一、仿真实验题目:6.将第4题中R1的电阻值改为4KΩ,试观察振荡电路输出波形,此时将电阻R2改为具有负温度系数的热敏电阻,(设此电阻值仍为10KΩ,随温度呈线性变化关系,在电阻模型参数中取Tc1=-0.13),设电路工作在28度,再次分析电路,记录输出波形,并分析原因。
图PSP-1-(1)热敏电阻值的计算:R2=R ES=R*r*[1+Tc1*(T-T0)+Tc2*(T-T0)*2]=10*1*[1-0.13*(28-27)]=8 .7KΩ环路增益:T(w0)=(R1+R2) / 3R1二.仿真电路原理图:图PSP-2-(1)三.参数图PSP-3-(1)输入文件图PSP-3-(2)图PSP-3-(3)四代码:**** 11/03/16 23:11:30 ******* PSpice 10.5.0 (Jan 2005) ******* ID# 0 ********** Profile: "SCHEMATIC1-DCSweep" [ F:\pspicejinshzuhen-pspicefiles\schematic1\dcsweep.sim ]**** CIRCUIT DESCRIPTION******************************************************************************** Creating circuit file "DCSweep.cir"** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS*Libraries:* Profile Libraries :* Local Libraries :.LIB "../../../pspice jinshzuhen-pspicefiles/pspice jinshzuhen.lib"* From [PSPICE NETLIST] section ofC:\OrCAD\OrCAD_10.5\tools\PSpice\PSpice.ini file:.lib "nom.lib"*Analysis directives:.TRAN 0 4S 0 10u.PROBE V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*)).INC "..\"**** INCLUDING ***** source PSPICE JINSHZUHENR_R4 N05859 0 10kC_C2 N05859 N007180 1uV_V2 N06084 0+PULSE 5v 10v 0 0 0 1ms 0C_C1 0 N05859 1uV_V3 0 N10500+PULSE 5v 10v 0 0 0 1ms 0R_R5 N06006 N06191 Rbreak 8.7kX_U1 N05859 N06006 N06084 N10500 N06191 uA741R_R1 N06006 0 4kR_R3 N007180 N06191 10k**** RESUMING DCSweep.cir ****.END**** 11/03/16 23:11:30 ******* PSpice 10.5.0 (Jan 2005) ******* ID# 0 ******** ** Profile: "SCHEMATIC1-DCSweep" [ F:\pspicejinshzuhen-pspicefiles\schematic1\dcsweep.sim ]**** Diode MODEL PARAMETERS******************************************************************************X_U1.dx X_U1.dyIS 800.000000E-18 800.000000E-18RS 1 1.000000E-03CJO 10.000000E-12**** 11/03/16 23:11:30 ******* PSpice 10.5.0 (Jan 2005) ******* ID# 0 ******** ** Profile: "SCHEMATIC1-DCSweep" [ F:\pspicejinshzuhen-pspicefiles\schematic1\dcsweep.sim ]**** BJT MODEL PARAMETERS******************************************************************************X_U1.qxNPNLEVEL 1IS 800.000000E-18BF 93.75NF 1BR 1NR 1ISS 0RE 0RC 0CJE 0VJE .75CJC 0VJC .75MJC .33XCJC 1CJS 0VJS .75KF 0AF 1CN 2.42D .87**** 11/03/16 23:11:30 ******* PSpice 10.5.0 (Jan 2005) ******* ID# 0 ******** ** Profile: "SCHEMATIC1-DCSweep" [ F:\pspicejinshzuhen-pspicefiles\schematic1\dcsweep.sim ]**** Resistor MODEL PARAMETERS******************************************************************************RbreakR 1**** 11/03/16 23:11:30 ******* PSpice 10.5.0 (Jan 2005) ******* ID# 0 ********** Profile: "SCHEMATIC1-DCSweep" [ F:\pspicejinshzuhen-pspicefiles\schematic1\dcsweep.sim ]**** INITIAL TRANSIENT SOLUTION TEMPERATURE = 27.000 DEG C ******************************************************************************NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE(N05859)-797.3E-06 (N06006)-778.0E-06 (N06084) 5.0000 (N06191) -.0018 (N10500) -5.0000 (X_U1.6) 168.7E-09 (X_U1.7) -.0018 (X_U1.8) -.0018 (X_U1.9) 0.0000 (N007180) -.0018 (X_U1.10) -.6085 (X_U1.11) 4.9603 (X_U1.12) 4.9603(X_U1.13) -.5946 (X_U1.14) -.5946(X_U1.53) 4.0000 (X_U1.54) -4.0000(X_U1.90)-114.7E-06 (X_U1.91) 40.0000(X_U1.92) -40.0000 (X_U1.99) 0.0000VOLTAGE SOURCE CURRENTSNAME CURRENTV_V2 -5.656E-04V_V3 -5.658E-04X_U1.vb 1.687E-12X_U1.vc 4.003E-12X_U1.ve 4.091E-12X_U1.vlim -1.147E-07X_U1.vlp -4.000E-11X_U1.vln -4.000E-11TOTAL POWER DISSIPATION 5.66E-03 WATTSJOB CONCLUDED**** 11/03/16 23:11:30 ******* PSpice 10.5.0 (Jan 2005) ******* ID# 0 ******** ** Profile: "SCHEMATIC1-DCSweep" [ F:\pspicejinshzuhen-pspicefiles\schematic1\dcsweep.sim ]**** JOB STATISTICS SUMMARY****************************************************************************** Total job time (using Solver 1) = 181.36五仿真波形:R1=5K时:T(w0)=(R1+R2) / 3R1=1 稳定震荡图PSP-5(1)✍R1=4k时: T(w0)=(R1+R2) / 3R1≈1.167>1 逐渐建立起振图PSP-5(2)图PSP-5(3)✍R1=4k R2=RES时:T(w0)=(R1+R2) / 3R1≈1.058图PSP-5(4)图PSP-5(5)六.分析小结:当R1=5K时产生了正弦波震荡,当R1=4k时波形产生了失真;当把R2换为热敏电阻后波形失真明显减小,具有负温度系数的热敏电阻阻值随温度的增高而减小,从而集成运放的增益减小,直到T(w0)=1,振荡器进入平稳状态,采用这种外稳服的方法,集成运放可以在线性状态下工作,有利于改善振荡电压的波形。
专业资料。