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公开(公告)号：US3562745A
公开(公告)日：1971-02-09
申请号：US3562745D
申请日：1968-01-29
申请人： AUTOMATIC ELECT LAB
发明人： VLAEMINCK NOEL
摘要： A MULTIFREQUENCY SIGNALING SYSTEM TRANSMITTER HAVING A CIRCUIT TO CLIP THE MULTIFREQUENCY PULSE DATA SIGNALS AT A VARIABLE LEVEL TO MINIMIZE TRANSIENTS GENERATED UPON SWITCHING SIGNAL SOURCES ON AND OFF THE TRANSMISSION LINE. THE CLIPPING LEVEL IS DETERMINED BY THE VOLTAGE APPLIED ACROSS A PAIR OF DIODES BY AN EXPONENTIALLY VARYING VOLTAGE OF CHARGING OR DISCHARGING CAPACITORS, VARYING FROM A COMPLETELY SHORT-CIRCUITED STATE WHEN THE DIODES ARE CONDUCTING IN SERIES, TO THE MAXIMUM VALUE OF THE SIGNAL WHEN THE DIODES ARE NON-CONDUCTIVE. THE CHARGING OR DISCHARGING OF THESE CAPACITORS IS CONTROLLED BY A PAIR OF TRANSISTORS THAT ARE SWITCHED BY AN EXTERNAL CIRCUIT APPLYING THE SIGNAL TO THE LINE.
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公开(公告)号：US3660681A
公开(公告)日：1972-05-02
申请号：US3660681D
申请日：1970-03-26
申请人： AUTOMATIC ELECT LAB
发明人： VLAEMINCK NOEL
摘要： A multifrequency signaling system transmitter having a circuit to clip the multifrequency pulse data signals at a variable level to minimize transients generated upon switching signal sources on and off the transmission line. The clipping level is determined by the voltage applied across a pair of diodes by an exponentially varying voltage of charging or discharging capacitors, varying from a completely short-circuited state when the diodes are conducting in series, to the maximum value of the signal when the diodes are non-conductive. The charging or discharging of these capacitors is controlled by a pair of transistors that are switched by an external circuit applying the signal to the line.
摘要翻译： 一种多频信号系统发射机，其具有以可变电平钳位多频脉冲数据信号的电路，以最小化在传输线路上传输和切断信号源时产生的瞬变。 限幅电平由一对二极管上施加的电压由二极管串联导通时的完全短路状态而变化的充电或放电电容器的指数变化的电压决定为当信号的最大值时 二极管是非导通的。 这些电容器的充电或放电由一对晶体管控制，该晶体管通过外部电路将信号施加到线路而被切换。
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