函数波形发生器

A1A0A2A3A4A5A61第九届电子设计竞赛论文所在院系通信与信息工程学院题目函数波形发生器A7A8A8A9A10A11A12A13A14A15A16A17A182目录摘要31、系统总体框图42、方案设计与论证521三角波变正弦波电路522输出波形幅度调节电路523直流电压信号产生电路63、硬件电路设计631恒流源电路632电路与触发器电路733三角波变正弦波734方案误差分析84、软件设计85、测试方法及测试结果851主要测试仪器952指标测试96、附录961总原理图1062参考文献12A19A20A21A22A23A24A253函数波形发生器摘要本系统以模拟电路为核心，以MSP430F149单片机为控制器，设计一个可以产生方波、三角波、TTL信号的函数波形发生器。其频率和幅值度可调，占空比可调。该波形发生器采集其输出信号的频率、幅度信息并进行反馈，实现了对输出信号的精准控制。本波形发生器是据波形发生、数据采集、D/A转换、软件编程等一系列的技术制造出来的高性能波形发生器，具有波形触发、波形步进、波形转换、存储、显示、测量、波形数据分析处理等独特优点，人机界面由液晶屏和键盘构成，使用方便。本系统有效地使用了MSP430F149单片机的片内资源，将数字电路与模拟电路高效地融合到一起，G18209合G14270G2172控制G12651G8873，实现波形输出。关键词波形发生器MSP430F149恒流源反馈FUNCTIONWAVEFORMGENERATORABSTRACTTHISSYSTEMTOANALOGCIRCUITASTHECORE,WITHMSP430F149FORCONTROLLER,THISSYSTEMTOANALOGCIRCUITASTHECORE,WITHMSP430F149MCUFORCONTROLDESIGNACANPRODUCESQUAREWAVE,TRIANGLEWAVEANDSQUAREWAVEFUNCTIONWAVEFORMGENERATORTHEFREQUENCYANDAMPLITUDEDEGREEADJUSTABLE,SQUAREWAVEOCCUPIESEMPTIESCOMPAREDADJUSTABLETHEWAVEFORMGENERATORFREQUENCYOFITSOUTPUTSIGNALCOLLECTINGINFORMATIONFEEDBACK,AMPLITUDE,REALIZINGTHEACCURATECONTROLOFTHEOUTPUTSIGNALTHISWAVEFORMGENERATORISACCORDINGTOTHEWAVEFORMHAPPEN,DATAACQUISITION,A/DCONVERSION,SOFTWAREPROGRAMMINGANDSOONASERIESOFTECHNOLOGYMADEOUTHIGHPERFORMANCEWAVEFORMGENERATOR,HASTHEWAVEFORMTRIGGER,WAVEFORMSTEPPING,WAVEFORMCONVERSION,STORAGE,DISPLAY,MEASUREMENT,WAVEFORMANALYSISOFDATAPROCESSING,ANDOTHERUNIQUEADVANTAGES,INADDITION,MANMACHINEINTERFACEBYLCDANDKEYBOARDSTRUCTURE,EASYTOUSETHISSYSTEMTOEFFECTIVELYUSETHEMSP430F149MCUWITHINTHEPIECEOFDIGITALCIRCUITRESOURCES,WILLEFFICIENTLYWITHANALOGCIRCUITTOGETHER,COOPERATEWITHAUTOMATICCONTROLALGORITHM,REALIZEWAVEFORMSOUTPUTKEYWORDSWAVEFORMGENERATORMSP430F149MCUCONSTANTCURRENTSOURCEFEEDBACKA26A27A28A29A30A31A3241系统总体框架本系统的G3534本G5049G1328G2419理是G17837G7691的G726系统G990电G2530，MSP430F149单片机G14270G2172G17885G17902一路G13499电器，将电G4493G13464G1025的一个电G4493G6521到电路G1025，并G17902G178192路DA输出2个G21676G16760电G2399值，使G5670G8981源G5332G3999G5049G1328G708对电G4493进行G1817G6930电G709。G8504G7114电路G5332G3999G14270G9620，产生出频率G11468G2528的方波、三角波、G8503G5370波以G2462TTL信号。G11507有效值测量电路G7828测三角波的有效值，并将该电G2399值G17877G14279MSP430F149单片机的ADCG6521G2487，MSP430G17902G17819调G14422其输出的一个PWM信号的占空比来控制一个G11464G8981电G2399信号，该信号输G1849到G1068G8873器，对输出信号的幅度进行调G6984，G11464G14279ADCG7828测到的电G2399值与G13582G11477值G11468等为G8502。G2528G7114，MSP430F149单片机对输出的TTL信号的频率进行采G7691，G14521采G7691G13479G7536与G20056G7411值G993G2528，G2029MSP430F149单片机对G1016路DA的输出进行调G6984，进G13792调G6984输出频率，使其G17247G2533G1122G20056G7411值。用G6155可以G17902G17819键盘输G1849G6164G19668的波形，并设G13634其频率、幅度，系统将G7693据用G6155输G1849的信息G14270G2172调G6984输出的波形，使其G2520G20045G2454数G12295G4462G3324用G6155设G13634的值G990。MSP430F1498A33D/AA34A35A36A37A3844A39A40A41A42A43A4412864A45A46A47A48A49A41A50A51A52A53A54A55A56A57A58A53A54A34A35A57A58A59A60A61A36A62A63A64A65A66A67A68A69A70A61A71A65A66A72A73A74A75A61A71A65A66A67A68A76A77A78A79A80A81A8252方案设计与论证21三角波变正弦波电路方G7708一G726使用G1314G17902G9400波器将三角波G2476为G8503G5370波将三角波G6365G1625G12447G2506G13435数G4649G5332G7265SIN2513SIN91SIN82TTTTUUMIPIG70811G709其G1025UM是三角波的幅值，由该G1856G5347G11705，G2494G16213设计一个G1314G17902G9400波器，使其G6142G8502频率G3835G1122三角波的G3534波频率G1000G4579G1122三角波的三G8437G16868波频率。G2375可将三角波G2476为G8503G5370波。方G7708G1120G726使用G6252G13459G8873G708G17892G8437G17936G17829G8873G709将三角波G2476为G8503G5370波G6252G13459G8873的G2419理，G2375对三角波的G17805进行分G8585，G6925G2476G2520个G8585的G7024率，G2375可将三角波G17829G1296地“G6252”成G8503G5370波。方G7708G17885用G726方G7708G1120的优点是输出频率、幅值G17751为G12295G4462，G13582点是三角波的G3845G11507比G17751G1017G18337，波形的频G16901G993G13443G1940，波形G17148量G993G3926方G7708一，G13783G15397到本G8437比G17199G16213G8726输出波形的频率能G332410HZG14279100KHZG19400G17842G13505可调，G1000频率G993高G6937采用方G7708一。图21G1314G17902G9400波A83A84A85A86A87A88A89622输出波形幅度调节电路方G7708一G726G3534G1122运G6930的G6930G3835电路用运G6930搭建反G11468G6930G3835器，G17902G17819调G14422G11468应电阻值，G2375可调G14422G6930G3835倍数，实现输出波形的幅度调G14422。方G7708G1120G726使用模拟G1068G8873器G1328为幅度调G6984电路G1068G8873器可以实现WXYZ的功能，函数发生器核心电路的G2419G3999输出信号G1328为X，用控制系统输出一个G11464G8981信号G1328为Y，用ZG1328为调零输G1849，G2375可实现输出信号的幅度调G6984。方G7708G17885用G726方G77081成本G1314，可以方便的用模拟的方G5347调G14422输出波形幅度，方G77082G2029G17902G17819调G14422G11464G8981信号，G17902G17819G1068G8873调幅，G2494G16213系统有可以程控的G11464G8981信号便可以实现调幅。G13783G15397到系统的闭环反馈，从程控的实现难度G990讲，方G77082更优，G1000使用G1068G8873器还可以实现信号的调零，G6937G17885择方G77082。23直流电压信号产生电路（用于乘法器输入端，调节幅度）方G7708一G726用集成DAC芯片G3926DAC0832，实现程控电G2399信号，用G1122幅度调G14422。方G7708G1120G726PWM转DA电路利用八位DA转换芯片DAC0832可以将电G2399控制G33240V与G3534准电G2399之G19400，其电G2399辨析度为G726G3534准电G2399/256，可G3534本满足G16213G8726，G1000成本G1314，G6937G17885G8504方G7708。3硬件电路设计31恒流源电路G5670G8981源可分为G8981出型CURRENTSOURCE和G8981G1849型CURRENTSINKG1016种，为了可以对电G4493G1817G6930电，我们设计了G17837G1016种电路，分别为电G8981输出G708图31左G709型和电G8981输G1849G708图31右G709型。电G2399信号VIN1为25V5V，G3324左G990图G1025，运G69302脚电G2399等G11223脚电G2399，G6937电阻R6G1016端电G2399差5VVIN1。发射极电G8981IE5VIN1/R6。因为集电极电G8981IC约等G1122IE，G6937IOUTICIE5VIN1/R6。当取R6200欧姆G7114，VIN输G184925V5VG2375可以产生025MA的电G8981。G2528理，对G1122电G8981输G1849行G5670G8981源，当R17100欧姆G7114，输G184925V5V电G2399，G2375可以产生050MA的电G8981。A90A91A92A93A94A95A967OP07200R1VT19012D11N400112V12V327465100R1D21N4001Q28050OP0712V12V327465图31G5670G8981源实现电路32电路与触发器电路比G17751器采用TIG1856司的G13459性比G17751器TLC372,RS触发器采用CD4011与非门搭建。电路G3926图5G6164示。G1016路比G17751器的输G1849电G2399与对应RS触发器的输G1849电平的关系G3926表格1G6164示G726比G17751器实现电路RP2和RP3分别用G112225V和25VG17837G1016个比G17751点的设G13634。TLC372为G5332漏输出，R10,R13为G990拉电阻，R11,R14用G1122限G8981，G1120极管D7,D8将负电G2399G9400除。G17902G17819比G17751器和与非门G19400的信号调理电路，交G8981信号转G2476为G11464G8981信号，使CD4011G8503常G5049G1328。比G17751器输G1849电G2399G708VG709R端输G1849G70800V,15VG709S端输G1849G70800V,15VG7095VIN250125VIN251125VIN510表1134恒流源充放电切换电路G5670G8981源切换电路设计的优劣会G11464G6521影响到输出波形的G17148量。当G5670G8981源切换到G6930电回路G7114，G14521S1G990的G2399降太G3835，会导致电G4493G993能G1817分G6930电，为了解决G17837一问题，我们G17885用了性价比G17751高的CD4051G1328为模拟G5332关。CD4051是精密单刀八掷模拟G5332关，实测数据显示，其导G17902电阻为98欧姆G70812V双电源供电G709，当G6930电电G8981G332410MAG7114，该电阻G990的G2399降可忽略G993计。G3324测试G17819程G1025，我们发现，G3926G7536电路G1025G2494有S1，没有S2，G3324频率G17751高G7114，三角波G3845G11507G1017G18337G708具图6G1817G6930电路体波形G2454见系统调试测试G13479G7536G709。G17837是因为G3324G5332关闭合前，G5670G8981源2G990端G708G2375图6G1025的A点G709电G2399G3835约为4V，电G4493G990端电G2399G708G2375图6G1025的B点G709为1V，突然将G1016个点G17842到一起，会使电G4493G3324切换回路的瞬G19400，电G2399值迅速下降，然G2530再G990升，最G2530才再G8503常G6930电。添加了S2和电位器G2530，可以解决G17837一问题。电路G3926右图G6164示，S1,S2由G2528一信号控制，控制信号为高电平G7114，S1断G5332，S2闭合，调G14422电位器电阻到360欧姆左右A97A98A99A100A101A102A1038使得10MA36036V,G17837G7114S2右端电G2399为15V左右，G17751为合适G708因高频G7114B点G3324G5332关导G17902前为15V左右G709，G17837G7691G3324G5332关闭合瞬G19400，G993会有瞬G19400电G2399骤降，三角波G3845G11507度很G4579。33三角波变正弦电路本电路采用了一阶G1314G17902G9400波，虽然G3324频率G17751高G7114信号衰减G17751G3835，但信号的波形保持G17751好，经G17819G6930G3835电路G6930G3835之G2530，可使其幅度恢复到G20056设幅度范围。34方案误差分析可能引起本系统测量误差的干扰形G5347包括G726输G1849信号与本振的G14270身G13464合干扰G708也叫噪G3780干扰G709G727G3818来干扰与本振的G13464合干扰G708也叫G2115波G17959干扰、G4504生G17902G17959干扰G709G727G3818来干扰G1126G11468形成的G1126调干扰，G3818来干扰与输G1849信号形成的交G2461调制干扰G708交调干扰G709，阻G3634、G1510G7143G9163频干扰,系统误差等。4软件设计流程图G1039G16213程G5219G8981程图G3926图4A104A105A106A107A108A105A109A110A111A112A113A114A115A116A117A118A119A120A121A122A119A120A123A124A119A120A125A126A127A128A129A130A131A132A133A134A135A136A137A138A139A116A139A1404A141A142A143A144A145A143A140A142A143A144A1455测试方法及其实验结果51主要测试仪器G311TDS1002数字示波器G727G312MFG8250A波形发生器G727G313UT39A数字G987用表G727A146A147A148A149A150A151A152952指标测试A153A154A155A156A157A15841A15941A160A161A162A163A164A165A166A167A168A160A161A162A163A165A166实G19481频率G708HZG709测量频率G708HZG709G2620G7411测量误差10099910MS015005032MS06100010011MS0120001992502S0450004969201S062100009676103S32由表可G11487出频率G17246G3835误差也G17246G3835，误差产生G2419因分析G7261、采用单片机G4462G7114器测频精G11842度G1314、速度G5942。2、G6984形电路G6984形效G7536G993G3827好。3、单片机资源占用G17751G3822，对G1025断G7114G19400和G6365键G2040断产生干扰。A169A170A171A172A173A174A175106附录61原理图611总原理图90KR3RES2100KR2RES210KR5RES2900KR1RES233UFC2CAP27PFC3CAP560PFC7CAPVAR560PFC4CAPVARP1BNC231S1SWSPDTGND10KR14RES210KR13RES2814321U4ANE5532AJG1UFC16CAPGNDGNDR1510K5V5VA176A177A178A179GND58234671U2LF356AHTO_AD603TO_AD603AV12VAV12VTO_ADCTO_FAV5VAV5V001UFC9CAPGND001UFC12CAPGND12345678GNDINU3AD603AQ100R11RES2GNDAV5VAV5V100UFC10CAPPOL1100UFC15CAPPOL1GNDGND215KR10RES247KR7RES21KR6RES2GND47R12RES247UFC14CAPPOL1GNDDAC01KR8RES21KR9RES2220UFC13CAPPOL1GND1MR4RES2GND240PFC5CAP2500PFC8CAPK11K21/10K31/100GNDSHUAIJIAN1SHUAIJIAN10SHUAIJIAN10012P2HEADER212P5HEADER2A180A181A182A183112P4HEADER2A180A181A182A1832A180A181A182A183312P3HEADER2A180A181A182A183481432U1ATL082ACDAV5V001UFC1GNDGND001UFC6CAPAV5V47UFC11CAPPOL1470R28RES2FPGAFKTOADC5VADA184A185A178A179AD_DATE1AD_DATE2AD_DATE3AD_DATE4AD_DATE5AD_DATE6AD_DATE7AD_DATE801UFC17CAPGNDLIANGSHUYU01UFC2001UFC2101UFC2201UFC1801UFC19GNDGNDGNDVDRV20D18GND1D54REFB13D27CLK10D36/IN16EXT12D45RSEL11D0LSB9VCC19D63D7MSB2IN17REFT14GND18CM15U11ADS830ETMS1TCK2TDI3TDO4RST5CANRX6CANTX7AV14AGND13AGND10AV8VREF12AGND9AV11VREFD15VREF016VREF217AIN0018AIN0119AIN0220AIN0321HVCAP22HVREF23HVAIN24HVAIN25XTAL126XTAL227MONEN28AIN27/A15/P1729AIN26/A14/P1630AIN25/A13/P1531AIN24/A12/P1432AIN23/A11/P1333AIN22/A10/P1234AIN21/A9/P1135AIN20/A8/P1036VDD37DGND38A15M/A7/P2739A14M/A6/P2640A13M/A5/P2541A12M/A4/P2442A11M/A3/P2343A10M/A2/P2244A9M/A1/P2145A8M/A0/P2046AIN37/AD7/D7/P3747AIN36/AD6/D6/P3648AIN35/AD5/D5/P3549AIN34/AD4/D4/P3450AIN33/AD3/D3/P3351AIN32/AD2/D2/P3252AIN31/AD1/D1/P3153AIN30/AD0/D0/P3054WR/P0755RD/P0656ALE/P0557P0458P0359P0260P0161P0062DGND63VDD64AD7/D7/P7765AD6/D6/P7666AD5/D5/P7567AD4/D4/P7468AD3/D3/P7369AD2/D2/P7270AD1/D1/P7171AD0/D0/P7072A15M/A7/P6773A14M/A6/P6674A13M/A5/P6575A12M/A4/P6476A11M/A3/P6377A10M/A2/P6278A9M/A1/P6179A8M/A0/P6080A15/P5781A14/P5682A13/P5583A12/P5484A11/P5385A10/P5286A9/P5187A8/P5088DGND89VDD90WR/P4791RD/P4692ALE/P4593P4494P4395P4296P4197P4098DAC199DAC0100C8051F040C8051F042U9C8051F040/042MCUSW1SWPB10KR17RES201UFC46CAP1UFC47CAP1KR18RES2PIN1POWER01UFC49CAP20R2220R2120R2047UFPC212PLED1LED201UFC5001UFC515VVIN3GND1VOUT2W1AS11173VD21UFC5201UFC53VDD1UFC5401UFC55AV470R23RES23VD247UFPC1XTAL1XTAL2RSTTMSTCKTD1TD0RSTCANRXCANTXVREFDVREF0VREF2AIN00AIN01AIN02AIN03HVREFHVAINHVAINP03P04P05P06P02P01P00P07P10P11P12P13P14P15P16P17P27P26P25P24P23P22P21P20P30P31P32P33P34P35P36P37P40P42P44P46P47P45P43P41P50P51P52P53P54P55P56P57P67P66P65P64P63P62P61P60P70P73P76P77P75P74P72P71DAC0DAC1VREFAVVDD12345678910JATG13VD2TMSTD1475KR19RES2TCKTD0MONENCAPSEMI001UFC48HVCAPVDD3VD2VDD3VD2DAC012345678LCD_DATE1HEADER8LCD_WRLCD_RDLCD_CSLCD_A0LCD_RSTADC_OEFIFO_1FIFO_2FIFO_3FIFO_4FIFO_5FIFO_6FIFO_7FIFO_8FIFO_ENFIFO_RFIFO_RSFIFO_FFT0_FMCU_CONTROLCONFIGLCD_DATEP61P63P60P7P62P64LCD_WRLCD_RDLCD_CSLCD_A0LCD_RSTP40P41P42P43FIFO_ENFIFO_RFIFO_RSFIFO_FFP3FIFO_DATEP00T0_FA186A187A188A189A187A190T0_FA191A192A193A194P57ADC_OEADC_OETLC5510A187A190A195A196A193CH2FIFO_XXFPGA_FIFOA197A194DAC0SHUAIJIAN1SHUAIJIAN10SHUAIJIAN100P50A198A199A200A201A202A2031