紅外光語(yǔ)音通信裝置(存儲(chǔ)版)
【正文】 通過(guò)調(diào)節(jié)和來(lái)改變?cè)鲆娣糯蟆Ｈ鐖D3所示。為了縮小體積，單片機(jī)使用TSSOP封裝。我們采用單個(gè)發(fā)射和單個(gè)接收的裝置，使用一個(gè)MOS管來(lái)驅(qū)動(dòng)，2N7002的導(dǎo)通內(nèi)阻和開(kāi)啟電壓值很低減少了成本，減少了功耗，提高了系統(tǒng)的穩(wěn)定性。圖1發(fā)射和接受模擬電路這種發(fā)射裝置是有許多的發(fā)射電路和許多的接收裝置并聯(lián)組裝而成的，它一般會(huì)用多個(gè)MOS管來(lái)驅(qū)動(dòng)，增加了電路的成本并大大降低了工作效率。二、理論分析與計(jì)算1．PWM調(diào)制脈沖寬度調(diào)制（PWM）是一種對(duì)模擬信號(hào)電平進(jìn)行數(shù)字編碼的方法，使用固定頻率矩形波的占空比來(lái)對(duì)模擬信號(hào)值進(jìn)行調(diào)制。8．溫度數(shù)據(jù)通道系統(tǒng)使用NTC熱敏電阻進(jìn)行測(cè)溫。+5V穩(wěn)壓由LM2940構(gòu)成， LM2940比7805的轉(zhuǎn)換效率高。3．運(yùn)算放大器芯片選擇 由于OP07非常低的輸入失調(diào)電壓，同時(shí)具有輸入偏置電流低和開(kāi)環(huán)增益高的特點(diǎn)，適用于放大傳感器的微弱信號(hào)。經(jīng)比較，本設(shè)計(jì)使用方案二。ASK調(diào)制是用調(diào)制信號(hào)去控制高頻正弦載波的幅度，使其按調(diào)制信號(hào)的規(guī)律變化的過(guò)程。關(guān)鍵詞：MSP430 PWM調(diào)制 濾波放大Abstract：The design concept of innovation and green based design and innovation, a novel infrared sound transmission device based on wireless resonant original emission, ultrasonic transmission, infrared emission, infrared transmission technology used only Yu Jun grade field munication, we further applied to civil field, pioneered the concept of science and technology innovation, so that further service to the people. The precise operational amplifier amplification, using low power operational amplifier chip, reduce power consumption. Especially the relay station, using 430 singlechip microputer with low power consumption for accurate data receiving and transmitting, simultaneously transmitting and receiving infrared probe less, reducing the power consumption of relay station, used to maintain the sound amplification in audio amplifier eventually receiving part uses a sound better, by Butterworth lowpass filter and bandpass filter are mute finally, extracted from signal analog channel and digital chan
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