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    • 2. 发明公开
    • Overvoltage protection device
    • Überspannungsschutz。
    • EP0148577A1
    • 1985-07-17
    • EP84307837.9
    • 1984-11-13
    • GENERAL SEMICONDUCTOR INDUSTRIES INC.
    • Skanadore, William R.
    • H02H9/04
    • H01L27/0255
    • A low capacitance, overvoltage protection circuit comprising a relatively large area semiconductor overvoltage suppressor chip coupled between first and second power supply voltage conductor (12,3). A low capacitance PIN diode (13 A-N) has one of its electrodes connected to a like electrode of the overvoltage suppressor chip and the other of its electrodes connected to a high speed signal conductor (14 A-N). During normal operation, the diode is always reversed biased, resulting in very low capacitance loading on the high speed signal conductor. During a transient overvoltage, the PIN diode is forward biased by the overvoltage, and forces reverse junction breakdown of the suppressor chip to occur, thereby limiting the amplitude of the overvoltage.
    • 一种低电容,过电压保护电路,包括耦合在第一和第二电源电压导体(12,3)之间的相对大面积的半导体过电压抑制器芯片。 低电容PIN二极管(13A-N)的一个电极连接到过电压抑制芯片的类似电极,另一个电极连接到高速信号导体(14A-N)。 在正常工作期间,二极管总是反向偏置,导致高速信号导体上的电容负载非常低。 在瞬态过电压期间,PIN二极管被过电压正向偏置,并且迫使抑制芯片发生反向击穿,从而限制过电压的幅度。
    • 3. 发明公开
    • Hybrid ac line transient suppressor
    • 关于AC电源线抑制瞬态混合设备。
    • EP0164193A1
    • 1985-12-11
    • EP85302537.7
    • 1985-04-11
    • GENERAL SEMICONDUCTOR INDUSTRIES INC.
    • Clark, O. Melville
    • H02H9/04
    • H02H9/005H02H9/04
    • An AC line transient suppressor (1) includes a first metal oxide varistor (5) connected between the «hot» and «neutral» lines (2, 3) of an AC power system. A first inductor (6) is con- . nected from the hot line to one terminal of a second metal oxide varistor (8), the other terminal of which is connected to the neutral line. A second inductor (9) having approximately twice the value of the first one (6) is connected from the junction between the first inductor and the second metal oxide varistor (8) to a hot supply terminal (10) to which equipment to be protected is connected. A silicon surge suppressor (11) having a predetermined clamping voltage is coupled between the hit supply terminal (10) and the neutral line conductor. The inductance of the first inductor has a value selected to divert approximately 95% of the transient surge current through the first metal oxide varistor. The second inductor diverts approximately 65% of the remaining surge current through the second metal oxide varistor, so that only approximately 2% of the total surge current flows through the silicon junction diode suppressor (11), allowing it to provide a low clamping voltage.