Abstract: An abnormal input control circuit includes at least one of a first, a second or a third detection circuit. The first detection circuit detects, as a first detection result, a noise superimposed on an input signal. The second detection circuit detects, as a second detection result, whether a pulse width of the input signal is less than or equal to a determined pulse width. The third detection circuit detects, as a third detection result, a mismatch between a level of the input signal and an operation of the switching element. An alarm and protection circuit includes an alarm signal output function and/or a drive adjustment function. Based on the first detection result, second detection result and/or the third detection result, the alarm and protection circuit outputs an alarm signal to outside by the alarm signal output function, and/or adjusts driving of the switching element by the drive adjustment function.

Abstract: A drive device for a voltage-controlled semiconductor element. The drive device includes: a short-circuit current detection circuit which detects a short-circuit current flowing through the voltage-controlled semiconductor element; a timer circuit which outputs a time setting signal indicative of a determined time, responsive to the short-circuit current detection circuit detecting the short-circuit current; and a control power source voltage variable circuit which receives a power supply voltage applied to the drive device, decreases the power supply voltage for a period for which the control power source voltage variable circuit receives the time setting signal from the timer circuit, to thereby obtain a stepped-down voltage, and outputs the stepped-down voltage as a control power source voltage.

Abstract: A semiconductor device including a transistor section and a diode section, the semiconductor device having: a temperature sensing section; a neighboring transistor section adjacent to the temperature sensing section; a neighboring diode section adjacent to the temperature sensing section; and a first non-neighboring diode section that is not adjacent to the temperature sensing section, wherein the first non-neighboring diode section has a pattern different from the pattern of the neighboring diode section in the top view is provided.

Abstract: A semiconductor device including a transistor section and a diode section, the semiconductor device having: a temperature sensing section; a neighboring transistor section adjacent to the temperature sensing section; a neighboring diode section adjacent to the temperature sensing section; and a first non-neighboring diode section that is not adjacent to the temperature sensing section, wherein the first non-neighboring diode section has a pattern different from the pattern of the neighboring diode section in the top view is provided.

Abstract: A drive device for driving a switching element. The drive device includes a turn-on output transistor which supplies a charging current to a gate of the switching element to turn on the switching element, a charging capability increase transistor connected in parallel with the turn-on output transistor, and a timer circuit connected to the charging capability increase transistor, and being configured to turn on the charging capability increase transistor when the turn-on output transistor is turned on, and to turn off the charging capability increase transistor a prescribed time after the charging capability increase transistor is turned on.

Abstract: A semiconductor device including a transistor section and a diode section, the semiconductor device having: a temperature sensing section; a neighboring transistor section adjacent to the temperature sensing section; a neighboring diode section adjacent to the temperature sensing section; and a first non-neighboring diode section that is not adjacent to the temperature sensing section, wherein the first non-neighboring diode section has a pattern different from the pattern of the neighboring diode section in the top view is provided.

Abstract: A signal indicating temperature of an IGBT chip, after input into an overheat detection terminal, is simultaneously input into a first comparator for protection operation and a second comparator for precaution. At a normal time when the chip temperature is low, a first transistor connected to an alarm signal output terminal via a resistor and a second transistor connected to the alarm signal output terminal via a Zener diode are turned off, and the alarm signal output terminal whose voltage is pulled up by an external pull-up circuit is set to high level voltage. When the second comparator detects a precaution condition, the second transistor is turned on, and the alarm signal output terminal is set to intermediate level voltage. When the first comparator detects chip overheat, the first transistor is turned on, and the alarm signal output terminal is set to low level voltage.

Abstract: A signal indicating temperature of an IGBT chip, after input into an overheat detection terminal, is simultaneously input into a first comparator for protection operation and a second comparator for precaution. At a normal time when the chip temperature is low, a first transistor connected to an alarm signal output terminal via a resistor and a second transistor connected to the alarm signal output terminal via a Zener diode are turned off, and the alarm signal output terminal whose voltage is pulled up by an external pull-up circuit is set to high level voltage. When the second comparator detects a precaution condition, the second transistor is turned on, and the alarm signal output terminal is set to intermediate level voltage. When the first comparator detects chip overheat, the first transistor is turned on, and the alarm signal output terminal is set to low level voltage.

Abstract: An apparatus for blood dialysis composed at least of a hemodialyzer (a) whereby blood is brought into contact with a dialysate via a semipermeable membrane and thus purified; a blood circulation system (b) composed of a blood circuit in the arterial side whereby blood is taken out from a patient and flown into the hemodialyzer and another blood circuit in the venous side whereby the blood flown out from the hemodialyzer is returned to the patient; a dialysate supplying/discharging system (c) for supplying and discharging the dialysate composed of a dialysate-supply line for supplying the dialysate to the hemodialyzer and a dialysate-discharge line for discharging the dialysate flown out from the hemodialyzer, and a means (d) of controlling the back-filtration speed. Owing to this constitution, individual steps from the preparation of the dialysis (treatment) to the completion of the treatment and the change from a specific step to the next step can be safely, surely and quickly carried out in most cases.

Abstract: An automatic dialyzer for purifying blood brought into contact with a dialysate via a semi-impermeable membrane. The dialyzer includes at least a blood circulating system and a dialysate supply/discharge system, wherein the blood line of the blood circulating system is connected to an overflow line having a reversibly-rotatable blood pump, a blood chamber, and an open/close device for overflowing of liquid from the blood chamber to the outside of the blood line. Liquid supply means is provided to a first bypass line and/or a second bypass line for supplying liquid in both forward and reverse directions to enable regulation of the supply amount of the dialysate for water removing/liquid replenishing. The supply speed of the liquid supply device and the supply speed of the blood pump are regulatable in conjunction with each other. Also provided is a dialyzing method using the automatic dialyzer.

Abstract: The present invention provides a dialysis coupler assembly comprising a pair of rubber-like elastic tubular couplers, and a pair of joint members for joining the couplers together. Each of the couplers includes an inner channel 14 allowing a connector associated with a medical device to be fitted therein, and a smooth surface 15, 16 perpendicular to the longitudinal axis of the coupler. The couplers are adapted to be joined together through the joint members in such manner that the smooth surfaces are in liquid-tight contact with one another. Each of the joint members is adapted to be attached slidably and rotatably onto corresponding one of the couplers, the joint members having first and second engagement portions, respectively. The first and second engagement portions are disposed opposed to one another and adapted to cooperatively engage the joint members with one another so as to allow the smooth surfaces to be brought into liquid-tight contact with one another.

Abstract: An apparatus for blood dialysis composed at least of a hemodialyzer (a) whereby blood is brought into contact with a dialysate via a semipermeable membrane and thus purified; a blood circulation system (b) composed of a blood circuit in the arterial side whereby blood is taken out from a patient and flown into the hemodialyzer and another blood circuit in the venous side whereby the blood flown out from the hemodialyzer is returned to the patient; a dialysate supplying/discharging system (c) for supplying and discharging the dialysate composed of a dialysate-supply line for supplying the dialysate to the hemodialyzer and a dialysate-discharge line for discharging the dialysate flown out from the hemodialyzer, and a means (d) of controlling the back-filtration speed. Owing to this constitution, individual steps from the preparation of the dialysis (treatment) to the completion of the treatment and the change from a specific step to the next step can be safely, surely and quickly carried out in most cases.

Abstract: The present invention provides a dialysis coupler assembly comprising a pair of rubber-like elastic tubular couplers, and a pair of joint members for joining the couplers together. Each of the couplers includes an inner channel 14 allowing a connector associated with a medical device to be fitted therein, and a smooth surface 15, 16 perpendicular to the longitudinal axis of the coupler. The couplers are adapted to be joined together through the joint members in such manner that the smooth surfaces are in liquid-tight contact with one another. Each of the joint members is adapted to be attached slidably and rotatably onto corresponding one of the couplers, the joint members having first and second engagement portions, respectively. The first and second engagement portions are disposed opposed to one another and adapted to cooperatively engage the joint members with one another so as to allow the smooth surfaces to be brought into liquid-tight contact with one another.

Abstract: An automatic dialyzer for purifying blood brought into contact with a dialysate via a semi-impermeable membrane, comprising at least a blood circulating system and a dialysate supply/discharge system, characterized in that the blood line of the blood circulating system is connected to an overflow line having a reversibly-rotatable blood pump and also having a blood chamber and an open/close means for overflowing of liquid from the blood chamber to the outside of the blood line, and liquid supply means, for supplying liquid in both forward and reverse directions and being able to regulate the supply amount of the dialysate for water removing/liquid replenishing, are provided to a first bypass line and/or a second bypass line, the supply speed of the liquid supply means and the supply speed of the blood pump being regulatable in conjunction with each other; and a dialyzing method using the automatic dialyzer.