PT2262/PT2272 chip to be code and decode, , the ASK amplitude modulation which adopts to send a far 315 MHZ blast-off frequency, but receiver use the super regenerative reception electric circuit, this system combines single slice machine to establish a password, making it have a double insurance, and can show by a LCD manifestation, and can shut a lock through a position sensor, and make use of an infrared ray examination, carry on voice warning, and carry on the segment of recording with the ISD1420, and carry on a voice hint.
摘要本系统以STC8952作为控制核心，运用PT2262/PT2272芯片作为编码与解码，采用了发射距离远的315MHZ发射频率的ASK幅度调制，而接收则采用了超再生接收电路，本系统结合单片机设密码，使其具有双从保险，且可通过液晶显示各种状态，可以通过位置传感器来自动闭锁，并利用红外线检测，进行声音告警，用ISD1420进行分段录音，并进行语音提示。
PT2262/PT2272 chip to be code and decode, , the ASK amplitudemodulation which adopts to send a far 315 MHZ blast-off frequency, but receiver use the super regenerative reception electric circuit, this system combines single slice machine toestablish a password, making it have a double insurance, and canshow by a LCD manifestation, and can shut a lockthrough a position sensor, and make use of aninfrared ray examination, carry on voice warning, and carry onthe segment of recording withthe ISD1420, and carry on a voice hint.
摘要本系统以STC8952作为控制核心，运用PT2262/PT2272芯片作为编码与解码，采用了发射距离远的315MHZ发射频率的ASK幅度调制，而接收则采用了超再生接收电路，本系统结合单片机设密码，使其具有双从保险，且可通过液晶显示各种状态，可以通过位置传感器来自动闭锁，并利用红外线检测，进行声音告警，用ISD1420进行分段录音，并进行语音提示。
started with the analysis of characteristic parameter of the successive detection logarithmic amplifier, mainly discusses the main factor affecting its transfer characteristic by mathematics reasoning to its transfer function, studies the correlative relations of the single stair's plus, the series with the dynamic range and the logarithmic precision by matlab and matrixx simulation. so two pieces of conclusion have been reached:one is on condition that the dynamic range is limited, the more the series that is used and the single stair's plus is less, the higher the logarithmic precision is. the other is that using the double amplifier chain can enhance the logarithm starting point, so its stability is improved. and the conclusion has been applied to the practical circuit's analysis of the tacan beaconing receiver.
摘 要：从分析连续检波式对数放大器的特性参数入手，对其传输函数进行了数学推导，重点讨论了影响其传输特性的主要因素，通过matlab和matrixx仿真，研究了输入动态范围与级联级数、单级增益和对数精度的相互关系，得出了两点结论：一是在限定动态范围的前提下采用的级数越多其单级增益越小而精度就会越高，二是采用双放大链结构可以提高对数起点，从而提高其稳定性。最后将结论应用于塔康信标接收机实际电路的分析中。关键词：对数放大器；连续检波；塔康信标；对数精度
Signal Attenuation and Its Variation Range Analysis in the Transmitter-Receiver Input Circuit of the Double Frequency Carrier Relaying System with Directional Comparison
双频率方向高频收讯回路衰耗的计算及其变化范围的分析
A sensitivity design method for a CMOS optoelectronic integrated circuit (OEIC) receiver is reported. The receiver consists of a regulated cascade (RGC) transimpedance amplifier (TIA) and a double photodiode (DPD) detector.
设计了一个由调节型级联跨阻抗放大器（TIA）和双光电二极管（DPD）构成的CMOS光电集成（OEIC）接收机。