signal receiving circuit

The phase-locked loop band-pass filter and the logarithmic amplifier is adopted in the circuit to insure the reliability of receiving signal.

电路中采用锁相带通滤波器和对数放大器，保证有效信号的可靠接收。

Arranged signal activating lock circuit and time-base control circuit in the sound wave receiving circuit to take the initial signal of back wave as the valid one in the cycle, thus to improve the ratio of signal vs. noise and detective precision.

在超声波接收电路中设有信号触发锁定电路和时基控制电路。实现以各探头中最早收到的回波信号为本检测单元的有效信号，有效提高信噪比和检测精度；

Infrared absorption methane concentration alarming device is comprised of microcontroller systems, light modulation module, signal conditioning module, digital display module, sound and light alarm module, remote control receiving module, standard output module interface circuit.

该红外吸收式的甲烷浓度报警器由单片机系统、光源调制模块、信号调理模块、数码显示模块、声光报警模块、遥控接收模块、标准频率输出模块等电路组成。

Anaiysis on Release Circuit for Receiving Part in Section Without Point in Rear of Home Signal

对进站内方设有无岔区段接车局部解锁电路的分析

Especially, the technology of burst mode receiver with a self_adaptive threshold setting circuit which is very important for receiving burst mode signal, is described in detail.

采用自动门限控制技术实现突发式光信号的接收，并采用延迟锁相环实现“首比特”的相位同步完成数据和时钟的恢复。