波胆比分

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波胆比分133-5607-3253

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噪声传感器的噪音分析及其调节噪声的相关小技巧

作者:多功能噪声频谱分析仪厂家 时间:2019-06-05 04:39   

波胆比分SUIZHESHIDAIDEBUDUANFAZHAN,ZAOSHENGCHUANGANQIZHUJIANZOUJINWOMENDESHENGHUOZHONG,BEIYUELAIYUEDUODERENKAISHISHUZHI,BUJINXINGNENGYOULIANG,ERQIETADESHIYONGSHOUMINGYESHIXIANGDANGZHANGJIUDE,ZAIDANGQIANDESHEHUISUANSHIHENCHANGJIANDELE,NEIMEDUIYUTADEZHISHININXIANGSHENRUDEQULEJIEMA?XIAMIANWOMENJIU“ZAOSHENGCHUANGANQIDEZAOYINFENXIJIQIDIAOJIEZAOSHENGDEXIANGGUANXIAOJIQIAO”LAIXIANGXILEJIEXIA。



【噪声传感器内部的噪声有哪些】


波胆比分   CHUANGANQIZAIWOMENDEGONGYEQUDANGZHONGSHIYONGFEICHANGGUANGFAN,MUQIANHENDUOQIYEDOUZAISHIYONG,BUDUANDITIGAOGONGZUOXIAOLV,NEIME,CHUANGANQIDIANLUNEIBUDEQIDAZAOSHENGYOUNAXIENI?JIEXIALAI,WOMENKANKANLIZHUNCHUANGANJISHUYOUXIANGONGSIDEGONGCHENGSHIRUHEJIESHAOCHUANGANQIDIANLUNEIBUDEQIDAZAOSHENG。

 传感器电路内部的七大噪声


 低频噪声


  DIPINZAOSHENGZHUYAOSHIYOUYUNEIBUDEDAODIANWEILIBULIANXUZAOCHENGDE。TEBIESHITANMODIANZU,QITANZHICAILIAONEIBUCUNZAIXUDUOWEIXIAOKELI,KELIZHIJIANSHIBULIANXUDE,ZAIDIANLIULIUGUOSHI,HUISHIDIANZUDEDAODIANLVFASHENGBIANHUAYINQIDIANLIUDEBIANHUA,CHANSHENGLEISIJIECHUBULIANGDESHANBAODIANHU。LINGWAI,JINGTIGUANYEKENENGCHANSHENGXIANGSIDEBAOLIEZAOSHENGHESHANSHUOZAOSHENG,QICHANSHENGJILIYUDIANZUZHONGWEILIDEBULIANXUXINGXIANGJIN,YEYUJINGTIGUANDECHANZACHENGDUYOUGUAN。


  半导体器件产生的散粒噪声


波胆比分   YOUYUBANDAOTIPNJIELIANGDUANSHILEIQUDIANYADEBIANHUAYINQILEIJIZAICIQUYUDEDIANHESHULIANGGAIBIAN,CONGERXIANXIANCHUDIANRONGXIAOYING。DANGWAIJIAZHENGXIANGDIANYASHENGGAOSHI,NQUDEDIANZIHEPQUDEKONGXUEXIANGHAOJINQUYUNDONG,XIANGDANGYUDUIDIANRONGCHONGDIAN。DANGZHENGXIANGDIANYAJIANXIAOSHI,TAYOUSHIDIANZIHEKONGXUEYUANLIHAOJINQU,XIANGDANGYUDIANRONGFANGDIAN。DANGWAIJIAFANXIANGDIANYASHI,HAOJINQUDEBIANHUAXIANGFAN。


       DANGDIANLIULIUJINGSHILEIQUSHI,ZHEIZHONGBIANHUAHUIYINQILIUGUOSHILEIQUDEDIANLIUCHANSHENGWEIXIAOBODONG,CONGERCHANSHENGDIANLIUZAOSHENG。QICHANSHENGZAOSHENGDEDAXIAOYUWENDU、PINDAIKUANDU△fCHENGZHENGBI。


 高频热噪声


波胆比分   GAOPINREZAOSHENGSHIYOUYUDAODIANTINEIBUDIANZIDEWUGUIZEYUNDONGCHANSHENGDE。WENDUYUEGAO,DIANZIYUNDONGJIUYUEJILIE。DAOTINEIBUDIANZIDEWUGUIZEYUNDONGHUIZAIQINEIBUXINGCHENGHENDUOWEIXIAODEDIANLIUBODONG,YINQISHIWUXUYUNDONG,GUTADEPINGJUNZONGDIANLIUWEILING。


       DANDANGTAZUOWEIYIGEYUANJIAN(HUOZUOWEIDIANLUDEYIBUFEN)BEIJIERUFANGDADIANLUHOU,QINEIBUDEDIANLIUJIUHUIBEIFANGDACHENGWEIZAOSHENGYUAN,TEBIESHIDUIGONGZUOZAIGAOPINPINDUANNEIDEDIANLUGAOPINREZAOSHENGYINGXIANGYOUSHEN。


波胆比分   TONGCHANGZAIGONGPINNEI,DIANLUDEREZAOSHENGYUTONGPINDAICHENGZHENGBI,TONGPINDAIYUEKUAN,DIANLUREZAOSHENGDEYINGXIANGJIUYUEDA。YIYIGE1kΩDEDIANZUWEILI,RUGUODIANLUDETONGPINDAIWEI1MHz,ZECHENGXIANZAIDIANZULIANGDUANDEKAILUDIANYAZAOSHENGYOUXIAOZHIWEI4μV(SHEWENDUWEISHIWENT=290K)。


       KANQILAIZAOSHENGDEDIANDONGSHIBINGBUDA,DANJIASHEJIANGQIJIERUYIGEZENGYIWEI106BEIDEFANGDADIANLUSHI,QISHUCHUZAOSHENGKEDA4V,ZHEISHIDUIDIANLUDEGANRAOJIUHENDALE。


 电路板上的电磁元件的干扰


  XUDUODIANLUBANSHANGDOUYOUJIDIANQI、XIANQUANDENGDIANCIYUANJIAN,ZAIDIANLIUTONGGUOSHIQIXIANQUANDEDIANGANHEWAIQIAODEFENBUDIANRONGXIANGZHOUWEIFUSHENENGLIANG,QINENGLIANGHUIDUIZHOUWEIDEDIANLUCHANSHENGGANRAO。


       XIANGJIDIANQIDENGYUANJIANQIFANFUGONGZUO,TONGDUANDIANSHIHUICHANSHENGSHUNJIANDEFANXIANGGAOYA,XINGCHENGSHUNSHILANGYONGDIANLIU,ZHEIZHONGSHUNJIANDEGAOYADUIDIANLUJIANGCHANSHENGJIDADECHONGJI,CONGERYANZHONGGANRAODIANLUDEZHENGCHANGGONGZUO。


  晶体管的噪声


波胆比分   JINGTIGUANDEZAOSHENGZHUYAOYOUREZAOSHENG、SANLIZAOSHENG、SHANSHUOZAOSHENG。


波胆比分   REZAOSHENGSHIYOUYUZAILIUZIBUGUIZEDEREYUNDONGTONGGUOBJTNEI3GEQUDETIDIANZUJIXIANGYINGDEYINXIANDIANZUSHIERCHANSHENG。QIZHONG'SUOCHANSHENGDEZAOSHENGSHIZHUYAODE。


  TONGCHANGSUOSHUODEBJTZHONGDEDIANLIU,ZHISHIYIGEPINGJUNZHI。SHIJISHANGTONGGUOFASHEJIEZHURUDAOJIQUDEZAILIUZISHUMU,ZAIGEGESHUNSHIDOUBUXIANGTONG,YINERFASHEJIDIANLIUHUOJIDIANJIDIANLIUDOUYOUWUGUIZEDEBODONG,HUICHANSHENGSANLIZAOSHENG。


  YOUYUBANDAOTICAILIAOJIZHIZAOGONGYISHUIPINGSHIDEJINGTIGUANBIAOMIANQINGJIECHULIBUHAOERYINQIDEZAOSHENGCHENGWEISHANSHUOZAOSHENG。TAYUBANDAOTIBIAOMIANSHAOSHUZAILIUZIDEFUHEYOUGUAN,BIAOXIANWEIFASHEJIDIANLIUDEQIFU,QIDIANLIUZAOSHENGPUMIDUYUPINLVJINSICHENGFANBI,YOUCHENG1/fZAOSHENG。TAZHUYAOZAIDIPIN(kHzYIXIA)FANWEIQIZHUYAOZUOYONG。


 电阻器的噪声


  DIANZUDEGANRAOLAIZIYUDIANZUZHONGDEDIANGAN、DIANRONGXIAOYINGHEDIANZUBENSHENDEREZAOSHENG。LIRUYIGEZUZHIWEIRDESHIXINDIANZU,KEDENGXIAOWEIDIANZUR、JISHENGDIANRONGC、JISHENGDIANGANLDECHUANBINGLIAN。YIBANLAISHUO,JISHENGDIANRONGWEI0.1~0.5pF,JISHENGDIANGANWEI5~8nH。ZAIPINLVGAOYU1MHzSHI,ZHEIXIEJISHENGDIANGANDIANRONGJIUBUKEHUSHILE。


波胆比分   GELEIDIANZUDOUHUICHANSHENGREZAOSHENG,YIGEZUZHIWEIRDEDIANZU(HUOBJTDETIDIANZU、FETDEGOUDAODIANZU)WEIJIERUDIANLUSHI,ZAIPINDAIKUANDUBNEISUOCHANSHENGDEREZAOSHENGDIANYAWEI:


  SHIZHONG:kWEIBOERZIMANCHANGSHU;TSHIWENDU(DANWEI:K)。REZAOSHENGDIANYABENSHENSHIYIGEFEIZHOUQIBIANHUADESHIJIANHANSHU,YINCI,TADEPINLVFANWEISHIHENKUANGUANGDE。SUOYIKUANPINDAIFANGDADIANLUSHOUZAOSHENGDEYINGXIANGBIZHAIPINDAIDA。


  JICHENGDIANLUDEZAOSHENG


波胆比分   JICHENGDIANLUDEZAOSHENGGANRAOYIBANYOULIANGZHONG:YIZHONGSHIFUSHESHI,YIZHONGSHICHUANDAOSHI。ZHEIXIEZAOSHENGJIANCIDUIYUJIEZAITONGYIJIAOLIUDIANWANGSHANGDEQITADIANZISHEBEIHUICHANSHENGJIAODAYINGXIANG。ZAOSHENGPINPUKUOZHANZHI100MHzYISHANG。


波胆比分        ZAISHIYANSHIZHONG,KEYIYONGGAOPINSHIBOQI(100MHzYISHANG)GUANCHAYIBANDANPIANJIXITONGBANSHANGMOUGEJICHENGDIANLUDIANYUANYUDIYINJIAOZHIJIANDEBOXING,HUIKANDAOZAOSHENGJIANCIFENG-FENGZHIKEDASHUBAIHAOFUSHENZHIFUJI。


【传感器电路中低噪声信号调理方法介绍】


接近传感器电路的低噪声信号调理



波胆比分 SUIZHEMOSHUZHUANHUANQIHESHUMOZHUANHUANQIFENBIANLVDETIGAOYIJIDIANYUANDIANYADEJIANGDI,YOUXIAOWEI(LSB)BIANDEGENGXIAO,ZHEISHIDEXINHAODIAOLIRENWUBIANDEGENGJIAKUNNAN。YOUYUXINHAODAXIAOGENGJIEJINYUBENDIZAOSHENG,YINCI,BIXUDUIWAIBUHENEIBUZAOSHENGYUAN(BAOKUOJohnson、SANLI、KUANDAI、SHANSHUOHEEMI)JINXINGCHULI。


1、不相关的噪声源采用平方根和(RSS)的形式进行叠加 :


(1)LINGYIFANGMIAN,QITAXIANGGUANZAOSHENGYUAN,RUSHURUPIANZHIDIANLIUXIAOCHUDENG,BIXUCAIYONGDAIYOUXIANGGUANYINZIDERSSXINGSHIJINXINGDIEJIA。


(2)SUOSHIDESHIDIANXINGXINHAODIAOLIDIANLUZHONGDEZAOSHENGYUAN,YIJIKEYONGYUFANXIANG、TONGXIANG、CHAFENJIQITATONGYONGPEIZHIDETONGYONGGONGSHI。


  2、正确的设计方法


CONGJIEJINCHUANGANQIJIQITEZHENGZAOSHENG、ZUKANG、XIANGYINGHEXINHAOFUDURUSHOU,SHIXIANDEZHEHEDAOSHURUDUAN(RTI)ZAOSHENGJIANGNENGGOUYOUHUAXINZAOBI(SNR)。


YUXIANJIEJUEZENGYIHEGONGHAOXUQIU、RANHOUZAINULIYINGDUIZAOSHENGWENTIDEFANGFAXIANGBI,WEIRAOZHEDIZAOSHENGLAIJIEJUEWENTIJIANGGENGJIAYOUXIAO。ZHEISHIYIGEZHONGFUDEGUOCHENG,SHOUXIANKAOLVFANGDAQIDEGONGZUOQU:KUANDAIHUO1/f。JIEZHE,TIAOXUANHESHIDEYOUYUANQIJIAN,SHEJIDEZAOSHENGTEXING。ZAIFANGDAQIZHOUWEIFANGZHIWUYUANQIJIAN,BINGXIANZHIDAIKUAN。RANHOUFENXIFEIZAOSHENGXUQIU,RUSHURUZUKANG、DIANYUANDIANLIUHEKAIHUANZENGYI。RUGUOMEIYOUDADAOZAOSHENGZHIBIAO,ZEZHONGFUZHEIYIGUOCHENG,ZHIDAOHUODEKEYIJIESHOUDEJIEJUEFANGANWEIZHI。


 3、运算放大器的选择


波胆比分 ZAIYIXIEQINGKUANGXIA,KUANDAIZAOSHENGWEI22nV/DEYUNSUANFANGDAQIKENENGYOUYUKUANDAIZAOSHENGWEI10nV/DEQIJIAN。RUGUOJIEJINCHUANGANQIGONGZUOZAIJIDIDEPINLVXIA,NEIME,JUYOUDI1/fZAOSHENGDEFANGDAQIKENENGSHIDE。


 4、轨到轨输入


DUIYUDIYASHEJILAISHUO,GUIDAOGUI(RR)SHUCHUHESHURUKENENGSHISHIHEDE。DANGGONGMOSHURUCONGYITIAOGUIZHUANDAOLINGYITIAOGUISHI,YIGECHAFENSHURUDUITINGZHIGONGZUO,LINGYIGECHAFENSHURUDUIZEJIEZHEGONGZUO。SHIDIAODIANYAHESHURUPIANZHIDIANLIUKENENGTURANBIANHUA,YINQIRUSUOSHIDESHIZHEN。DUIYUDIZAOSHENGSHEJILAISHUO,QINGJIANCHADUIGUIDAOGUISHURUTEXINGDEXUQIU。


波胆比分 WEILEJIEJUEZHEIGEWENTI,ADIGONGSIDEAD8506 DENGYUNSUANFANGDAQISHIYONGNEIBUDIANHEBENGLAIXIAOCHUSHURUDIANYAJIAOYUESHIZHEN。RUGUOSHEJIBUZHENGQUE,ERSHIDIANHEBENGCHANSHENGDEZAOSHENGLUORUYOUYONGPINDAISHI,ZHEIXIEZAOSHENGJIANGHUICHUXIANZAISHUCHUDUAN,YINQIWENTI。


   5、偏置电流消除


XINDESHUANGJIXINGYUNSUANFANGDAQISHIYONGYIZHONGJISHULAIXIAOCHUSHURUPIANZHIDIANLIUZAOCHENGDEBUFENYINGXIANG,ZHEIGEJISHUHUIZENGJIABUXIANGGUANHUOXIANGGUANDEDIANLIUZAOSHENG。DUIYUYIXIEFANGDAQILAISHUO,XIANGGUANZAOSHENGKENENGDAYUBUXIANGGUANZAOSHENG。LIRU,WEIADIGONGSIDEOP07ZENGJIAZUKANGPINGHENGDIANZU,JIUNENGGAIJINZHENGTIZAOSHENG。BIAO1 BIJIAOLEADIGONGSILIANGKUANGUANGFANYINGYONGDEYUNSUANFANGDAQI,YIKUANSHIYONGJIAOGAODIANYAZAOSHENGHUANQUJIAODIDIANLIUZAOSHENGDEOP07,LINGYIKUANSHIOP27。


CONGKEHUODEDEDIZAOSHENGQIJIANZHONGXUANZESANDAOSIGEQIJIAN。KAOLVGONGYIJISHU,XUNZHAOZIWENLING、ZHANBOHEPIANZHIDIANLIUXIAOCHUDENGZHUANYESHEJIJISHU。CONGJINGYUANZHAOPIANCHAKANSHURUJINGTIGUANQUYU,DASHURUJINGTIGUANDEZAOSHENGJIAODI,DANJUYOUDADESHURUDIANRONG,ERCMOSHEJFETFANGDAQIDEDIANLIUZAOSHENGYUANXIAOYUSHUANGJIXINGQIJIAN。DIZAOSHENGSHEJIYAOSHIYONGXIAODIANZU,SUOYIFANGDAQISHUCHUQUDONGBIXUZUGOUDA,YIQUDONGDAFUZAI。


 6、无源元件的选择


XUANZEFANGDAQIZHIHOU,ZAIFANGDAQIZHOUWEIFANGZHIHESHIDEDIANZUHEDIANRONG,ERZHEIXIEYUANJIANYEYOUZAOSHENG。 SUOSHIDESHISHIYONGCUOWUDEDIANZUZHISUOZAOCHENGDEYINGXIANG。SHUCHUZAOSHENGSUIZHEYONGYUSHEZHIZENGYIDEDIANZUDEZENGDAERZENGDA。


LEJIEJIEJINCHUANGANQIDETEXINGSHIFEICHANGZHONGYAODE。HULVER1HER2DEZAOSHENG,JIZHONGKAOLVYUANZUKANGRDEZAOSHENG,XIANSHICHUDANGRZHIJIAOXIAOSHI,DIANYAZAOSHENGZHANZHUDAODIWEI;DANGRZHIWEIZHONGDENGDAXIAOSHI,JohnZAOSHENGZHANZHUDAO;DANGRZHIJIAODASHI,DIANLIUZAOSHENGDEGONGXIANJIAODA。YINCI,DISHUCHUZUKANGDEJIEJINCHUANGANQIYINGGAISHIYONGXIAODIANZUHEJUYOUDIDIANYAZAOSHENGDEYUNSUANFANGDAQI。


CHUDIANZUZHIWAI,DIANRONGYENENGYONGYUBUCHANGHEJIANXIAOZAOSHENG。DIANKANGYUANJIANBUZENGJIARENHEZAOSHENG,DANLIUJINGTAMENDEZAOSHENGDIANLIUJIANGCHANSHENGZAOSHENGDIANYA,YINGXIANGJISUAN。ZONGZHI,ZHONGYAODESHIZAIFANGDAQIZHOUWEISHIYONGDIZUKANGLAIJIANGDIDIANLIUZAOSHENG、REZAOSHENGHEEMIZASANGANRAOSHIQUDEYINGXIANG。


YISHANGGUANYU“ZAOSHENGCHUANGANQINEIBUDEZAOSHENGYOUNAXIE”HE“CHUANGANQIDIANLUZHONGDIZAOSHENGXINHAODIAOLIFANGFAJIESHAO”DEJIESHAO,XIWANGNENGRANGNINLEJIE“ZAOSHENGCHUANGANQI”DAILAIBANGZHU。