【正文】 l routes and what control methods, according to the actual situation (such as object, operational requirements and cost accounting, etc.) to decide. General infrared remote transceiver system by infrared remote control transmitter signal coding, infrared remote control signal receivers and decoders (or decoder chip MCU) and the external circuit consisting of three parts. Signal transmitter remote control code used to generate pulses of infrared emissiondriven output infrared remote control signal, receiver pletion of the remote control signal amplification and detection, plastic and demodulation encoding pulse. Infrared remote control coded pulse is going to obtain a continuous serial binary code, and for most of the infrared transceiver system, This serial code as microcontroller of the remote control input signals from the internal CPU pletion of the remote control instruction decoder, on the other infrared remote control transceivers, the designers of electronic products, The internal microcontroller of the remote control decoder directive is not accessible. Therefore, people are using infrared encoder / decoder chip and microcontroller developed various generic infrared remote transceiver system, In various equipment infrared signals between the transceiver. Remote transceiver system generally transmitters and receivers is posed of two parts. Launchers from the general direction keys, coded instructions circuit modulation circuit, driving circuit, firing circuit of several parts. When pressed a key, the directive coding circuit, in the corresponding instructions encoded signal, the encoder signal to the carrier modulation, Driven by the power amplifier circuit after circuit fired from the field after firing instructions coded modulation signals. General receiver by the receiving circuit, the amplifier circuit, demodulation circuits, instruction decoder circuit, driving circuit, circuit implementation of several parts. Receiving Circuit will launch vehicles have been coded modulation signal receiving instructions from, and to enlarge evacuation demodulation circuit. Demodulation circuit will have the coding modulation signal demodulation, namely, reduction of signal coding. The instruction decoder to the encoder signal decoding, Driven by the final circuit to drive the implementation of various instructions circuit to control the operation. infrared remote control transceiver product profiles infrared remote control transceiver product structure and type Currently infrared transceiver in accordance with the mode of transmission rate and can be divided into four categories : Serial mode, the highest rate of Kbps。 Infrared Remote Control System Abstract： Red outside data correspondence the technique be currently within the scope of world drive extensive usage of a kind of wireless conjunction technique, drive numerous hardware and software platform support. Red outside the transceiver product have cost low, small scaled turn, the baud rate be quick, point to point SSL, be free from electromagism thousand Raos etc. characteristics, can realization information at dissimilarity of the product fast, convenience, safely exchange and transmission, at short distance wireless deliver aspect to own very obvious of advantage .Along with red outside the data deliver a technique more and more mature, the cost descend, red outside the transceiver necessarily will get at the short distance munication realm more extensive of application. The purpose that design this system is transmit customer’s operation information with infrared rays for transmit media, then demodulate original signal with receive circuit. It use coding chip to modulate signal and use decoding chip to demodulate signal. The coding chip is PT2262 and decoding chip is PT2272. Both chips are made in Taiwan. Main work principle is that we provide to input the information for the PT2262 with coding keyboard. The input information was coded by PT2262 and loading to high frequent load wave whose frequent is 38 kHz, then modulate infrared transmit dioxide and radiate space outside when it attian enough power. The receive circuit receive the signal and demodulate original information. The original signal was decoded by PT2272, so as to drive some circuit to acplish customer’s operation demand. Keywords: Infrared dray； Code； Decoding； LM386； Red outside transceiver 1 Introduction research the background and significance Infrared Data Communication Technology is the world wide use of a wireless connection technology, by the many hardware and software platforms supported. Is a data through electrical pulses and infrared optical pulse switch between the wireless data transceiver technology. Infrared transceiver products with low cost, small, fast transmission rate, the pointtopoint transmission security, not subject to electromagic interference and other characteristics that can be achieved between the different products, rapid, convenient and safe exchange and transmission, In short distance wireless transmission have a very distinct advantage. Infrared transceiver products in the portable product of a great role. At present, the world39。下 半 部分是 被 放大的一組字碼：一個(gè) 字碼由 12 位 AD 碼（地址碼 和 數(shù)據(jù)碼，如 8 位地址碼加 4 位數(shù)據(jù)碼）組成，每個(gè) AD 位用兩個(gè)脈沖來 表示 ：兩個(gè)窄脈沖 意思是 “0” ；兩個(gè)寬脈沖 意思是 “1” ；一個(gè)窄脈沖和一個(gè)寬脈沖 意思是 “F”即 地址碼的 “ 懸空 ” 。 地址碼和數(shù)據(jù)碼都 使用 用寬度不同的脈沖來表示，兩個(gè)窄脈沖表示 “0” ；兩個(gè)寬脈沖表示 “1” ；一個(gè)窄脈沖和一個(gè) 寬脈沖表示 “F” ，表達(dá)的是 地址碼的 “ 懸空 ” 。系統(tǒng)反碼與功能反碼分別是系統(tǒng)碼與功能碼的反碼，反碼的 引入 是為了能在接收端校對(duì)傳輸過程中是否產(chǎn)生 了 差錯(cuò)。 系統(tǒng)碼也 稱為 識(shí)別碼，它用來 表示 遙控系統(tǒng)的種類，以 此 區(qū)別其它遙 控系統(tǒng)，防止各遙控系統(tǒng)的 錯(cuò)誤 動(dòng)作。 遙控編碼脈沖信號(hào)（ 如 PPM 碼） 一般 由 引導(dǎo)碼 、系統(tǒng)碼、系統(tǒng)反碼、功能碼、功能反碼等組成。前者以寬脈沖為 1，窄脈沖 為 0。 紅外通信編碼基礎(chǔ)知識(shí) 通 常 情況下， 紅外遙控 收發(fā)器 將信號(hào) (二進(jìn)制脈沖 )調(diào)制在 38KHz 的載波上， 在經(jīng)過緩沖放大后送 到 紅外發(fā)光二極管，轉(zhuǎn)化為紅外 光 信號(hào)發(fā)射出去。 紅外線不能穿過或繞過人和物體，在進(jìn)行數(shù)據(jù)傳輸時(shí)，光路不能被阻斷； 傳播范圍 沒有限制 ， 沒 有 頻率干擾問題 ，同 無線電波方式 比較 ， 不需要對(duì) 頻譜資源問題向 相關(guān)部 門進(jìn)行 申 請(qǐng)和登記，