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    • 9. 发明授权
    • 범용 디지탈 접속 모듈회로
    • 通用数字连接模块电路
    • KR1019900007404B1
    • 1990-10-08
    • KR1019870014176
    • 1987-12-11
    • 삼성반도체통신주식회사
    • 서중교
    • G06F3/00
    • The circuit for connecting regardless of the type of voltage or current drive and varying the transmission speed by using a timer comprises a CPU (10) processing the data, a first and second clock generators (80,90) providing clock signal to the CPU, a clock divider (100) dividing the first clock, a timer (20) providing the receiving/ transmitting clock, a programable communication interface circuit (30) receiving/transmitting the data sychronously or asynchronously, a decoder (60) providing the selection signal of voltage or current driving mode, a switching circuit (70) switching to the selected driving mode, a first driver (40) serving for the voltage drived apparatus like a facsimile, and a second driver serving for the current drived apparatus like a teletype.
    • 无论电压或电流驱动的类型如何,通过使用定时器来改变传输速度的连接电路包括处理数据的CPU(10),向CPU提供时钟信号的第一和第二时钟发生器(80,90) 分配第一时钟的时钟分频器(100),提供接收/发送时钟的定时器(20),可编程通信接口电路(30),以同步或异步方式接收/发送数据;解码器(60) 电压或电流驱动模式,切换到选择的驱动模式的开关电路(70),用于诸如传真机的电压驱动装置的第一驱动器(40)和用于如电传的电流驱动装置的第二驱动器。
    • 10. 发明授权
    • 디지탈 데이타 송수신 회로
    • 数字数据发射器和接收器
    • KR1019900003663B1
    • 1990-05-28
    • KR1019870012032
    • 1987-10-29
    • 삼성반도체통신주식회사
    • 서중교
    • H04L1/22H04L25/08
    • The circuit having function for compensating signal diminution according to the distance utilizing autogain adjuster includes a preamplifier (400) for amplifying signal from a transformer (300), a bandpass filter (500) for filtering output signal of the preamplifier (400), a main amplifier (600) for amplifying band pass filtered signal, a level detector (700) for detecting peak level of output signal of the main amplifier, a current feeder (800) for converting peak level voltage into appropriate current, an anto gain adjuster (900) for maintaining level of input data to the preamplifier regardless to the distance by adjusting impedance according to the output current of the current feeder.
    • 具有用于利用自动增益调节器根据距离补偿信号减小的功能的电路包括用于放大来自变压器(300)的信号的前置放大器(400),用于滤波前置放大器(400)的输出信号的带通滤波器(500) 用于放大带通滤波信号的放大器(600),用于检测主放大器的输出信号的峰值电平的电平检测器(700),用于将峰值电平转换成适当电流的电流馈线(800),辅助增益调节器 ),用于通过根据当前馈线的输出电流调节阻抗来将输入数据的电平维持到前置放大器,而不管距离如何。