分析了調(diào)幅信號(hào)和載波信號(hào)之間的相位差與調(diào)制信號(hào)的極性的對(duì)應(yīng)關(guān)系,得出了相敏檢波電路輸出電壓的極性與調(diào)制信號(hào)的極性有對(duì)應(yīng)關(guān)系的結(jié)論。為了驗(yàn)證相敏檢波電路的這一特性,給出3 個(gè)電路方案,分別選用理想元件和實(shí)際元件,采用Multisim 對(duì)其進(jìn)行仿真實(shí)驗(yàn),直觀形象地演示了相敏檢波電路的鑒相特性,是傳統(tǒng)的實(shí)際操作實(shí)驗(yàn)所不可比擬的。關(guān)鍵詞:相敏檢波;鑒相特性;Multisim;電路仿真
Abstract : The corresponding relation between modulation signal polarity and difference phases of amplitudemodulated signal and the carrier signal ,the polarity of phase2sensitive detecting circuit output voltage and the polarity of modulation signal are correspondent . In order to verify this characteristic ,three elect ric circuit s plans are produced ,idea element s and actual element s are selected respectively. Using Multisim to carry on a simulation experiment ,and then demonst rating the phase detecting characteristic of the phase sensitive circuit vividly and directly. Which is t raditional practical experience cannot be com pared.Keywords :phase sensitive detection ;phase2detecting characteristic ;Multisim;circuit simulation
標(biāo)簽：
相敏檢波
電路
仿真研究
鑒相
上傳時(shí)間：
2013-11-23
上傳用戶：guanhuihong
電路板故障分析
維修方式介紹
ASA維修技術(shù)
ICT維修技術(shù)
沒(méi)有線路圖,無(wú)從修起
電路板太複雜,維修困難
維修經(jīng)驗(yàn)及技術(shù)不足
無(wú)法維修的死板,廢棄可惜
送電中作動(dòng)態(tài)維修,危險(xiǎn)性極高
備份板太多,積壓資金
送國(guó)外維修費(fèi)用高,維修時(shí)間長(zhǎng)
對(duì)老化零件無(wú)從查起無(wú)法預(yù)先更換
維修速度及效率無(wú)法提升,造成公司負(fù)擔(dān),客戶埋怨
投資大量維修設(shè)備,操作複雜,績(jī)效不彰
標(biāo)簽：
電路板維修
技術(shù)資料
上傳時(shí)間：
2013-10-26
上傳用戶：neu_liyan
