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    • 1. 发明授权
    • Power output stage having a darlington-pair circuit for switching an
inductive load, especially the ignition coil of an internal-combustion
engine
    • 功率输出级具有用于切换感应负载,特别是内燃机的点火线圈的达林顿对电路
    • US5424671A
    • 1995-06-13
    • US030493
    • 1993-05-25
    • Gerd HohneHartmut MichelLothar GademannBernd Bodig, deceased
    • Gerd HohneHartmut MichelLothar GademannBernd Bodig, deceased
    • F02P3/045F02P3/04F02P3/05F02P3/055F02P9/00H03K17/615
    • F02P3/0552F02P3/0435F02P9/002
    • A power output stage has a Darlington-pair circuit (11, 12) for switching an inductive load, especially the ignition coil of an internalcombustion engine. In order to predetermine the operating mode of the power output stage, a switch (24) is provided which bridges the base-emitter junction of the Darlington-pair circuit (11, 12), is closed in the event of a quick disconnection of the output stage, and is opened in the event of a voltage-limited disconnection of the output stage. A voltage divider, which consists of at least two resistors (16, 18) and bridges the switching junction of the Darlington-pair circuit (11, 12), is connected by means of its pick-off to the junction point between the switch (24) and the base of the Darlington-pair circuit (11, 12), the switch (24) being connected in parallel with a part (18) of the voltage divider. When the switch (24) is open, the Darlington-pair circuit is consequently raised again upon reaching a lower limiting voltage of, for example, 35 volts over the resistor (16), so that, in the case of driving an ignition coil, a spark-free disconnection is achieved. Only a very few, simple and cheap components are required for this purpose.
    • PCT No.PCT / DE91 / 00712 Sec。 371日期:1993年5月25日 102(e)日期1993年5月25日PCT 1991年9月7日PCT PCT。 出版物WO92 / 05364 日期:1992年4月2日。功率输出级具有用于切换感性负载,特别是内燃机的点火线圈的达林顿对电路(11,12)。 为了预先确定功率输出级的工作模式,提供了一个开关(24),其桥接达林顿对电路(11,12)的基极 - 发射极结,在快速断开 输出级,并且在输出级的电压限制断开的情况下被打开。 由至少两个电阻器(16,18)组成的分压器并桥接达林顿对电路(11,12)的开关结,通过其拾取器连接到开关( 24)和达林顿对电路(11,12)的基极,开关(24)与分压器的一部分(18)并联连接。 当开关(24)断开时,达尔顿对电路因此在电阻器(16)上达到例如35伏特的较低限制电压时再次升高,使得在驱动点火线圈的情况下, 实现无火花切断。 为此目的只需要很少的,简单和便宜的部件。
    • 3. 发明授权
    • Darlington transistor circuit
    • 达林顿晶体管电路
    • US4539492A
    • 1985-09-03
    • US464503
    • 1983-01-27
    • Hartmut MichelLothar GademannErich Jesse
    • Hartmut MichelLothar GademannErich Jesse
    • H03K17/04H03K17/0412H03K17/14H03K17/60H03K17/615H03K3/26H03K3/313
    • H03K17/615H03K17/04126
    • A three-stage Darlington transistor circuit having a power transistor (T.sub.3), a driver transistor (T.sub.2) and an initial transistor (T.sub.1) is provided. The collectors of these three transistors are connected with one another, while the emitter of the driver transistor (T.sub.2) is connected to the base of the power transistor (T.sub.3), and the emitter of the initial transistor (T.sub.1) is connected to the base of the driver transistor (T.sub.2). Connected to the base of the driver transistor (T.sub.2) is a series circuit comprising a first resistor (R.sub.1), which is connected directly to this base, and a Zener diode (ZD), the anode of the Zener diode being connected with the resistor (R.sub.1); and a second resistor (R.sub.2); the second resistor (R.sub.2) is connected in parallel to the emitter-base path of the driver transistor (T.sub.2). Upon the attainment of a predetermined voltage at the cathode of the Zener diode (ZD), the driver transistor (T.sub.2) and the power transistor (T.sub.3) are switched ON. The temperature dependency of this switch-on voltage can be adjusted by varying the resistance ratio of these two resistors (R.sub.1, R.sub.2).
    • PCT No.PCT / DE82 / 00045 Sec。 371日期1983年1月27日 102(e)日期1983年1月27日PCT提交1982年3月5日PCT公布。 出版物WO82 / 04509 日期为1982年12月23日。提供具有功率晶体管(T3),驱动晶体管(T2)和初始晶体管(T1)的三阶段达林顿晶体管电路。 这三个晶体管的集电极彼此连接,而驱动晶体管(T2)的发射极连接到功率晶体管(T3)的基极,并且初始晶体管(T1)的发射极连接到基极 的驱动晶体管(T2)。 连接到驱动晶体管(T2)的基极的是串联电路,其包括直接连接到该基极的第一电阻器(R1)和齐纳二极管(ZD),齐纳二极管的阳极与电阻器 (R1); 和第二电阻器(R2); 第二电阻器(R2)并联连接到驱动晶体管(T2)的发射极 - 基极路径。 当在齐纳二极管(ZD)的阴极达到预定电压时,驱动晶体管(T2)和功率晶体管(T3)导通。 可以通过改变这两个电阻(R1,R2)的电阻比来调节该接通电压的温度依赖性。