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应用PT4301来做接受端功能模块，具有较高的频率稳定度,接收灵敏度极高灵敏度达-114dBm,接收距离是普通同类模块的2-3倍;有合理的接收带宽,抗干扰能力特强，适应各种环境使用;传输速率可达20kbps;输出为数据cmos电平信号,可直接至标准****或cpu解码,频率为315m~433.92m,适合与同频****模块及遥控手柄配套,用于各种遥控器,报警器及单片机短距离数据传输.
     应用范围：各种低速率数字信号的接收;工业遥控,遥测,遥感;防盗报警器信号接收,各种家用电器的遥控等.------------------------
     DESCRIPTION
     The PT4301 is a very low power and highly sensitive single chip OOK/ASK super-heterodyne receiver for
the 315MHz and 434MHz frequency bands that offers a high level of integration and requires only a few external components. The PT4301 consists of a low-noise amplifier (LNA), an image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO) and loop filter, a 10.7MHz intermediate frequency (IF) limiting amplifier stage with received-signal-strength indicator (RSSI), and analog baseband data recovery circuitry (data filter, peak detector, and data slicer). The PT4301 also implements a discrete one-step automatic gain control (AGC) that reduces the LNA gain by 20dB when the RF input signal is greater than -47dBm. The PT4301 is available in a 24-pin SSOP package.     FEATURES
• Low current consumption (5mA fully active mode at 315MHz)
• 2.4V to 5.5V supply voltage operation range
• Optimized for 315MHz or 434MHz ISM Band
• On-chip image-rejection function
• High dynamic range with on-chip AGC
• Low power down mode current (<1μA)
• High sensitivity of -114dBm (315MHz, 2Kb/s AM 99% square-wave modulation)
• 24-pin SSOP package    APPLICATIONS
• Remote keyless entry (RKE) systems
• Remote control systems including garage door and gate openers
• Alarm and security systems
• Wireless sensors     主要应用到：汽车摩托车防盗器、车库门、电动门窗、闸门、工业控制、遥控灯、遥控开关、通讯以及安防、物联网、智能家居等相关无线领域

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