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壓控晶振怎么做時鐘發生器?單片機中的晶振應用

作者:OCXO 時間:2019-04-29 10:59:46來源:恒溫晶振廠家 閱讀數:
摘要:壓控晶振是目前行業中流行的電子元件,他怎么來做時鐘發生器!晶振如何在單片機中應用?本篇文章為大家詳細介紹:...

     有關于壓控晶振怎么來做時鐘發生器,晶盛小編在下面為大家提供一種解決思路和方案,希望能幫助到大家!另外有關于單片機中的晶振應用,晶盛小編也為大家詳細介紹一下:

  壓控晶體振蕩器,即VCXO,其振蕩頻率由晶體決定,但可用控制電壓在小范圍內對頻率進行調整,控制電壓范圍一般為0V至2V或0V至3V。VCXO的調諧范圍為±100ppm至±200ppm。圖1為一個典型VCXO CLK發生器的結構和晶振電路模型。

晶振

  TU1. DIANXINGVCXO CLKFASHENGQIDEJIEGOUTU

澳门百家乐攻略  BIANRONGERJIGUANCV1HECV2DERONGZHIBIANHUAHUIYINGXIANGDAOJINGZHENMOXING,CONGERGAIBIANZHENDANGPINLV。LIANGGEWAIJIEBINGLIANDIANRONGCS1HECS2YONGLAIDIAOZHENGXIEZHENFANWEIHEZHONGXINPINLVDEPIANYI。ANZHAOTU1SUOSHIDEJINGZHENDIANLU,XIEZHENPINLVKEYONGXIASHIBIAOSHI:

澳门百家乐攻略  QIZHONGCLSHIYOUCV1,2HECS1,2JUEDINGDEDENGXIAOFUZAIDIANRONG。KEZHUNQUEDIBIAOSHIWEI:CL = (CV1+CS1) || (CV2 + CS2)。QUYIJIEJINSIBINGKAOLVDAOC1 << C0HECL,KEDEDAOfCDEPINLVZENGLIANG。

晶振

  TU2WEICS1 = CS2SHI,fCSUICS1ZHIBIANHUADEDIANXINGQUXIANTU。

澳门百家乐攻略  TU2. VCXOPINLVYUBINGLIANDIANRONGCS1 (CS1 = CS2)

  LIYONGZHEYIWEIDIAOTEXING,KESHIYONGVCXOHEPLLGOUCHENGYIGEJUYOUWEIDIAOTEXINGDECLKFASHENGQI。VCXO CLKYIJINGZAIDUOZHONGXITONGZHONGDEDAOYINGYONG,RUSHUZIDIANSHI,SHUZIYINPIN,ADSLHESTB。

  VCXO CLK發生器的關鍵參數

  YOUXUDUOCANSHUYONGLAIMIAOSHUVCXO CLKFASHENGQI。QIZHONGZUIZHONGYAODESHIDIAOXIEDIANYAFANWEI、ZHONGXINPINLV、QIANYINFANWEIYIJISHIZHONGSHUCHUDOUDONG。

  DIAOXIEDIANYAFANWEIWEIVCXOKONGZHIDIANYADEBIANHUAFANWEI,CIDIANYAKONGZHIBIANRONGERJIGUANDEDIANRONG。TONGCHANGWEI0VZHI2VHUO3V。ZHONGXINPINLVWEIVCXOSHUCHUPINLVFANWEIDEZHONGDIAN。QIANYINFANWEIWEIBIANHUAPINLV(ZENGDAHUOJIANSHAO)YUZHONGXINPINLVDEBIZHI。CIBIZHIYIBANYONGppmBIAOSHI(BAIWANFENZHIYI),DAIBIAOVCXODEXIANGDUIPINLVQIANYINFANWEI。TONGCHANGQIANYINFANWEIDAYUEWEI100ppmZHI200ppm,QUJUEYUVCXODEJIEGOUHESUOXUANZEDEJINGTI。

  SHIZHONGDOUDONGSHICLKFASHENGQIDEYIGEZHONGYAOCANSHU,YOUDUOZHONGGUANYUDOUDONGDEDINGYI。LIANGGEZUICHANGYONGDEDOUDONGCANSHUCHENGWEI“ZHOUQI”DOUDONGHE“ZHOUQIJIAN”DOUDONG,WOMENJIANGZAIDISIJIEXIANGXITAOLUNZHEXIEWENTI。DOUDONGQUJUEYUCLKFASHENGQIDEJIEGOU,XINPIANZHIJIANHUIYOUCHAYI,BUTONGDEYINGYONGDUIDOUDONGDEYAOQIUYEBUXIANGTONG。

單片機中的晶振應用

澳门百家乐攻略  SHUOQI11.0592mhzJINGZHEN,DONGXINGPENGYOUDEDIYIFANYINGJIUSHIZHESHIDANPIANJIJINGZHEN。NEIME,WEISHENMEDANPIANJISHANGYONGDESHI11.0592mhzJINGZHENNI?GENSUIYANGXINGKEJILAIXIANGXIDELEJIEYIXIA!

  一、為什么51單片機愛用11.0592MHZ晶振?

澳门百家乐攻略  QIYI:YINWEITANENGGOUZHUNQUEDIHUAFENCHENGSHIZHONGPINLV,YUUART(TONGYONGYIBUJIESHOUQI/FASONGQI)LIANGCHANGJIANDEBOTELVXIANGGUAN。TEBIESHIJIAOGAODEBOTELV(19600,19200),BUGUANDUOMEGUGUAIDEZHI,ZHEXIEJINGZHENDOUSHIZHUNQUE,CHANGBEISHIYONGDE。

澳门百家乐攻略  QIER:YONG11.0592JINGZHENDEYUANYINSHI51DANPIANJIDEDINGSHIQIDAOZHIDE。YONG51DANPIANJIDEDINGSHIQIZUOBOTELVFASHENGQISHI,RUGUOYONG11.0592MhzDEJINGZHEN,GENJUGONGSHISUANXIALAIXUYAODINGSHIQISHEZHIDEZHIDOUSHIZHENGSHU;RUGUOYONG12MhzJINGZHEN,ZEBOTELVDOUSHIYOUPIANCHADE,BIRU9600,YONGDINGSHIQIQU0XFD,SHIJIBOTELV10000,YIBANBOTELVPIANCHAZAI4%ZUOYOUDOUSHIKEYIDE,SUOYIYEHUANNENGYONGSTC90C516 JINGZHEN12M BOTELV9600,BEISHUSHIWUCHALV6.99%,BUBEISHUSHIWUCHALV8.51%,SHUJUKENDINGHUICHUCUO。 ZHEYEJIUSHICHUANKOUTONGXINSHIDAJIAXIHUANYONG11.0592MHzJINGZHENDEYUANYIN,ZAIBOTELVBEISUSHI,ZUIGAOKEDADAO57600,WUCHALV0.00%。 YONG12MHz,ZUIGAOYEJIU4800,ERQIEYOU0.16%WUCHALV,DANZAIYUNXUFANWEI,SUOYIMEIDUODAYINGXIANG。

  二、在設計51單片機系統PCB時,晶振為何被要求緊挨著單片機?

  YUANYINRUXIA:JINGZHENSHITONGGUODIANJILILAICHANSHENGGUDINGPINLVDEJIXIEZHENDONG,ERZHENDONGYOUHUICHANSHENGDIANLIUFANKUIGEIDIANLU,DIANLUJIEDAOFANKUIHOUJINXINGXINHAOFANGDA,ZAICIYONGFANGDADEDIANXINHAOLAIJILIJINGZHENJIXIEZHENDONG,JINGZHENZAIJIANGZHENDONGCHANSHENGDEDIANLIUFANKUIGEIDIANLU,RUCIZHEBAN。DANGDIANLUZHONGDEJILIDIANXINHAOHEJINGZHENDEBIAOCHENGPINLVXIANGTONGSHI,DIANLUJIUNENGSHUCHUXINHAOQIANGDA,PINLVWENDINGDEZHENGXIANBO。ZHENGXINGDIANLUZAIJIANGZHENGXIANBOBIANCHENGFANGBOSONGDAOSHUZIDIANLUZHONGGONGQISHIYONG。

  WENTIZAIYUJINGZHENDESHUCHUNENGLIYOUXIAN,TAJINJINSHUCHUYIHAOWAWEIDANWEIDEDIANNENGLIANG。ZAI IC(JICHENGDIANLU) NEIBU,TONGGUOFANGDAQIJIANGZHEGEXINHAOFANGDAJIBAIBEISHENZHISHANGQIANBEICAINENGZHENGCHANGSHIYONG。

  JINGZHENHE IC JIANYIBANSHITONGGUOTONGZOUXIANXIANGLIANDE,ZHEGENZOUXIANKEYIKANCHENGYIDUANDAOXIANHUOSHUDUANDAOXIAN,DAOXIANZAIQIEGECILIXIANDESHIHOUHUICHANSHENGDIANLIU,DAOXIANYUECHANG,CHANSHENGDEDIANLIUYUEQIANG。XIANSHIZHONG,CILIXIANBUCHANGJIAN, DIANCIBOQUEDAOCHUDOUSHI,LIRU:WUXIANGUANGBOFASHE、DIANSHITAFASHE、SHOUJITONGXUNDENGDENG。JINGZHENHEICZHIJIANDELIANXIANJIUBIANCHENGLEJIESHOUTIANXIAN,TAYUECHANG,JIESHOUDEXINHAOJIUYUEQIANG,CHANSHENGDEDIANNENGLIANGJIUYUEQIANG,ZHIDAOJIESHOUDAODEDIANXINHAOQIANGDUCHAOGUOHUOJIEJINJINGZHENCHANSHENGDEXINHAOQIANGDUSHI,ICNEIDEFANGDADIANLUSHUCHUDEJIANGBUZAISHIGUDINGPINLVDEFANGBOLE,ERSHILUANQIBAZAODEXIN HAO,DAOZHISHUZIDIANLUWUFATONGBUGONGZUOERCHUCUO。SUOYI,HUAPCB(DIANLUBAN)DESHIHOU,JINGZHENLITADEFANGDADIANLU(ICGUANJIAO)YUEJINYUEHAO。

壓控晶振怎么做時鐘發生器?單片機中的晶振應用相關問答:

問題:晶振壞了會有什么現象?

回答:澳门百家乐攻略振蕩器就是產生時鐘的,最壞情況,停止工作。那么會導致宕機。時鐘錯誤,頻率錯誤,信息報錯,數據紊亂等各種情況。

問題:澳门百家乐攻略如何降低晶體振蕩器的品質因數?

回答:晶體振蕩器的品質因數在出廠時就已經固定了,不能在去改變了。但如果你是生產晶體振蕩器的,那么你在制造振蕩器前,選擇品質因數較低的晶片(晶體)就可以了。一般Q值高的頻率穩定度

問題:澳门百家乐攻略晶體振蕩器為什么不能貼板焊?

回答:您好,這個要具體情況具體分析哦!在一定條件下,可能是因為晶體的特殊的溫度特性的原因 !

問題:晶振的分類

回答:石英晶體振蕩器分 非溫度補償式晶體振蕩器、溫度補償晶體振蕩器(TCXO)、電壓控制晶體振蕩器(VCXO)、恒溫控制式晶體振蕩器(OCXO)和數字化/μp補償式晶體振蕩器(DCXO/MCXO)等幾種類型。其中,無溫度補償式晶體振蕩器是最簡單的一種,在日本工業標準(JIS)中 ,稱其為標準封裝晶體振蕩器(SPXO)。

問題:澳门百家乐攻略潮濕環境下影響晶體振蕩器什么參數

回答:標稱電源電壓、標稱負載阻抗、基準溫度(25℃)以及其他條件保持不變,晶體振蕩器的頻率相對與其規定標稱值的最大允許偏差,即(fmax-fmin)/f0; 溫度穩定度 其他條件保持不變,在規定溫度范圍內晶體振蕩器輸出頻率的最大變化量相對于溫度范圍內輸出頻率極值之和的允許頻偏值,即(fmax-fmin)/(fmax+fmin); 頻率調節范圍 通過調節晶振的某可變元件改變輸出頻率的范圍

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