摘要:
A lateral-type semiconductor device is provided in which a p-emitter layer and a p-collector layer are formed on the exposed-surface side of an n-base layer. The exposed surfaces of the p-emitter layer and the n-base layer are substantially surrounded by the exposed surface of the p-collector layer. The n-base layer is connected to a base electrode or through a first heavily-doped region extending from under the n-base region to an exposed surface area on the outer-periphery side of the p-collector layer. In an alternative embodiment a second heavily-doped region for connecting the n-base layer and the first heavily-doped region can be provided.
摘要:
A fraction of current passing through the P-emitter region and N-base region of a thyristor is by-passed to the base-emitter junction of a PNP transistor. The amount of the base current is dependent on the thyristor current. Thus, as the anode current of the thyristor increases, the base current and hence the collector current of the PNP transistor increases. The collector current by-passed to the PNP transistor is fed, via a switch which is closed during the off-time of the thyistor, to the base-collector path of an NPN transistor whose collector and emitter are respectively connected to the gate and cathode of the thyristor. The turn-on voltage across the collector and emitter of the NPN transistor accordingly becomes lower than the gate-cathode voltage of the thyristor. The base-emitter current of the NPN transistor equals the collector current of the PNP transistor, the collector current being a fraction of the anode current by-passed to the PNP transistor. A fraction of the anode current of the turned-on thyristor is utilized as the control power for driving the NPN transistor so that additional external power for turning off the thyristor becomes almost unnecessary.
摘要:
In a bidirectional linear switch in which two MOS transistors are used with their sources mutually connected, the gates and the substrates of the transistors are also respectively mutually connected and a control signal is applied to the gates. A potential of the polarity such that the substrates are reversely biased to the sources is applied between the substrates and the sources. With this constitution, the linearity of the bidirectional switch is improved.
摘要:
A reference voltage circuit in which an output reference voltage is stabilized against variations in power source as well as in transistor current amplification factor h.sub.FE. In a reference voltage circuit comprising a DC power source connected to an output terminal, first and second resistors with their respective one ends commonly connected to the output terminal, a first NPN transistor with its collector shorted with its base and connected to the other end of the first resistor and its emitter grounded, a second NPN transistor with its collector connected to the other end of the second resistor and its base connected to the collector of the first NPN transistor, a third resistor connected between the emitter of the second NPN transistor and the ground, and a third NPN transistor with its collector connected to the output terminal, its base connected to the collector of the second NPN transistor and its emitter grounded, there are further provided a fourth resistor connected between the collector of the third NPN transistor and the output terminal and a PNP transistor with its base connected to the collector of the third NPN transistor, its emitter connected to the output terminal and its collector grounded.
摘要:
A voltage across a resistor of a small value connected in series with the cathode or anode of a thyristor is used as a signal source for overcurrent detection. When an overcurrent is generated, the voltage across the resistor increases in excess of the built-in voltage between the base and emitter of a transistor, thereby turning on the transistor. A transistor to take out a current from the gate of the thyristor is turned on. Thus, the self-turn off operation of the thyristor is executed.
摘要:
A device for driving a capacitive load, comprising a first switching element responsive to an external control signal for selectively conducting a charge current therethrough to the load, a second switching element responsive to the external control signal for conducting a discharge current from the load and a generator for generating from the discharge current a cutoff signal to be applied to the first switching element to ensure turn-off of the latter.
摘要:
A turn-off control circuit for a gate turn-off thyristor is used in a state where one end of an inductive load is connected therewith on the cathode side. The turn-off control circuit includes a first turning-off transistor, which takes-out electric current through the gate at the first stage of the turn-off operation of the gate turn-off thyristor, and a second turning-off transistor, which takes-out electric current through the gate at the second stage of the turn-off operation of the gate turn-off thyristor so as to surely effect the turn-off operation.
摘要:
Electrically conductive conjugate fibers having a diameter less than 50 fm. The fibers include a thermoplastic sheath and a low-melting metal core, with the core occupying 0.2 to 50% of the sectional area of the fiber. The sectional area of the core varies by less than 25% in the longitudinal direction, and the total length of the discontinuous portions of the core is 5 cm or less per meter. The fibers can be produced with a conjugate spinning nozzle. The low-melting metal is provided to the nozzle from a closed fusion tank located at a position below the spinning nozzle. The metal is supplied to the spinning nozzle by means of pressure from inert gas, which is supplied to an upper space of the fusion tank. The level of metal in the fusion tank is maintained substantially constant, and the pressure of the gas is controlled so as to maintain a pressure variation of 0.1 kg/cm.sup.2 or less.
摘要翻译:直径小于50微米的导电复合纤维。 纤维包括热塑性护套和低熔点金属芯,其中芯占纤维截面面积的0.2-50%。 芯的截面积沿纵向变化小于25%,芯的不连续部分的总长度为每米5厘米或更小。 纤维可以用复合纺丝喷嘴生产。 将低熔点金属从位于纺丝喷嘴下方位置的封闭的熔化罐提供给喷嘴。 通过来自惰性气体的压力将金属供给到纺丝喷嘴,惰性气体被供应到熔化罐的上部空间。 熔池中的金属含量保持基本恒定,并且控制气体的压力以保持0.1kg / cm 2以下的压力变化。
摘要:
A process and apparatus for pneumatic-pressure forming or vacuum/pneumatic-pressure forming a web of thermoplastic material into a matrix form of containers and having the thus-formed plastic product processed with a thermal fixation operation, which comprises in combination the steps of holding a forming mold at a thermal fixing temperature for the plastic to be formed so as to have the matrix of containers thermally fixed through a temperature range characteristic of the plastic; and cooling-off thus-formed plastic containers, while maintaining the interior of the formed plastic containers at such a pressure level that the formed plastic containers are no longer subjected to any risk of deformation after the forming mold is removed, and after having been removed from the engagement with the forming mold.
摘要:
Electrically conductive conjugate fibers having a diameter less than 50.mu.m. The fibers include a thermoplastic sheath and a low-melting metal core, with the core occupying 0.2 to 50% of the sectional area of the fiber. The sectional area of the core varies by less than 25% in the longitudinal direction, and the total length of the discontinuous portions of the core is 5 cm or less per meter. The fibers can be produced with a conjugate spinning nozzle. The low-melting metal is provided to the nozzle from the closed fusion tank located at a position below the spinning nozzle. The metal is supplied to the spinning nozzle by means of pressure from inert gas, which is supplied to an upper space of the fusion tank. The level of metal in the fusion tank is maintained substantially constant, and the pressure of the gas is controlled so as to maintain a pressure variation of 0.1 kg/cm.sup.2 or less.
摘要翻译:直径小于50微米的导电复合纤维。 纤维包括热塑性护套和低熔点金属芯,其中芯占纤维截面面积的0.2-50%。 芯的截面积沿纵向变化小于25%,芯的不连续部分的总长度为每米5厘米或更小。 纤维可以用复合纺丝喷嘴生产。 低熔点金属从位于纺丝喷嘴下方位置的封闭式熔化罐提供给喷嘴。 通过来自惰性气体的压力将金属供给到纺丝喷嘴,惰性气体被供应到熔化罐的上部空间。 熔池中的金属含量保持基本恒定,并且控制气体的压力以保持0.1kg / cm 2以下的压力变化。