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1. 发明专利

JPH11356058A POWER SEMICONDUCTOR DEVICE AND POWER CONVERTER USING THE SAME 失效
公开(公告)号：JPH11356058A
公开(公告)日：1999-12-24
申请号：JP16177798
申请日：1998-06-10
申请人： HITACHI LTD , HITACHI HARAMACHI SEMI CONDUCT
发明人： KOIKE YOSHIHIKO , KOYANAGI ASAKO , SHIMIZU HIDEO , SAITO RYUICHI , TAKATSUCHI SHIGEYASU , KARIYA TADAAKI , NAKAMURA KIYOSHI
IPC分类号： H02M7/48 , H02M7/5387
摘要： PROBLEM TO BE SOLVED: To reduce the non-uniformity of current in each element and suppress the generation of electromagnetic noise by regulating the wiring resistance of an emitter auxiliary terminal so that it may be at least a specified times as large as the contact resistance at a place where a terminal which is outside a module and wherein main current is caused to flow is connected, and may be at most a specified rate to the gate resistance installed outside the module. SOLUTION: The resistance Rs of an emitter auxiliary terminal between main circuit wirings is set to at least 10 times as large as the contact resistance Rcont at a section where main terminals C1, C2, C3, E1, E2, and E3 are tightened by bolts to wiring bus bars 108, 109 main circuits of a power converter and at most 1/100 times as small as the external gate resistance. By setting the resistance Rs within such a range, even if some of the contact resistances Rcont increase due to the loosening of the bolt tightening, for example, the main terminal E1 to the wiring bus bar 109 of the power converter, loop current can be suppressed small, thereby preventing the generation of electromagnetic noise and malfunction at the time of switching operation.

2. 发明专利

JPH02103092A DRIVING CIRCUIT AND THIN-FILM EL DISPLAY DEVICE 失效
公开(公告)号：JPH02103092A
公开(公告)日：1990-04-16
申请号：JP25471788
申请日：1988-10-12
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OKUTSU MITSUHIKO , ABE KENJI , KARIYA TADAAKI
IPC分类号： G09G3/30
摘要： PURPOSE:To reduce the electric power consumption of the thin-film EL display device and to miniaturize the device by executing the on control of a source side high-voltage switching (S) element for supplying current to a load by a low-voltage S element provided to a sink side high-voltage S element. CONSTITUTION:A transistor (Tr) 10 is turned on through a power source terminal 2 from the emitter of an NPN Tr 10 when the low-pressure switching (S) element 15 is turned on and a PMOS Tr 72 in a buffer circuit 7 is turned on. On the other hand, a thyristor 8 is turned on via a collector of the Tr 10 when the S element 15 is turned off and the Tr 72 is turned on. This current is supplied from a low-voltage power source terminal 4 and is automatically annihilated together with the voltage rise of the output terminal. The need for passing the gate driving current of a thyristor 8 from a high-voltage power source terminal 1 is, therefore, eliminated and the need for an NPN Tr for driving is eliminated. The number of the high voltage resistance elements is decreased and the chip size at the time of integration is reduced; in addition, the electric power consumption is reduced.

3. 发明专利

JPH01192218A PULSE GENERATING CIRCUIT 失效
公开(公告)号：JPH01192218A
公开(公告)日：1989-08-02
申请号：JP1582988
申请日：1988-01-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ABE KENJI , OKUTSU MITSUHIKO , KAWAMOTO KOJI , YUZAWA NOBORU , KARIYA TADAAKI
IPC分类号： H05B33/08 , H03K17/73
摘要： PURPOSE:To reduce ineffective power consumption of a transistor(TR) for thyristor drive by providing a short pulse generating means generating a short pulse synchronously with a control signal and using a generated short pulse so as to control a drive means driving a thyristor. CONSTITUTION:In the case of charging drive of a capacitive load 5, a control signal IN(A) fed to a control input terminal 15 goes to a high level and is fed to a NAND circuit 19 of a short pulse generator 17 and an odd number stage of inverter 18. Then an output signal of the short pulse generator 17 becomes a pulse signal having a width of delay time tON of the inverter 18 of odd number stage. The pulse signal rises synchronously with the leading of the control signal IN(A) applied to the control input terminal 15 to turn on the thyristor drive TR 2 for tON the thyristor 1 is triggered and transited to the ON state. Thus, useless power consumption in the thyristor drive TR 2 is avoided and the power consumption of a pulse generating circuit is reduced. In the case of utilizing it for an EL display panel drive, it is easy to integrate lots of pulse generating circuits.

4. 发明专利

JPH01163796A DRIVING CIRCUIT 失效
公开(公告)号：JPH01163796A
公开(公告)日：1989-06-28
申请号：JP32156087
申请日：1987-12-21
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OKUTSU MITSUHIKO , KARIYA TADAAKI , KAWAMOTO KOJI , KANEKO HIDEZO , MASUKO YASUHIRO
IPC分类号： G09G3/22 , G09G3/30 , H03K17/567 , H03K17/62 , H03K17/66
摘要： PURPOSE: To obtain sufficient current driving capability while securing operation in the safe operation area of NPN by providing a resistance between a low- voltage power source terminal and a low-voltage power source wire to a buffer circuit. CONSTITUTION: The base currents of NPN transistor's(TR) SN (SN1 SNn ) are supplied from the low-voltage power source terminal VCC through P-MOSFET MPs (MP1-MPn) in the buffer circuit, and there is a difference in the total of the base currents of elements SN which is an integral multiple of the number of channels of a driving circuit between load driving and load discharging. Therefore, when all the elements SN are on, i.e., in the safe operation area, the voltages between the gates and sources, and drains and sources of the elements MP supplied with the base currents drop because of the voltage drop across the resistance R provided between the terminal VCC and buffer circuit B, so the outputs of the elements MP, i.e., the base currents of the elements SN decrease to suppress sink currents of the elements SN. Therefore, the safe operation area can be protected.

5. 发明专利

JPS648893A INDUCTOR ROW DRIVING CIRCUIT FOR LINEAR MOTOR 失效
公开(公告)号：JPS648893A
公开(公告)日：1989-01-12
申请号：JP16267487
申请日：1987-06-30
申请人： HITACHI LTD
发明人： WADA MASAYUKI , MATSUZAKI HITOSHI , SHIMURA TATSUO , KARIYA TADAAKI
IPC分类号： H02P25/06 , H02P7/00
摘要： PURPOSE:To reduce the number of switches, by connecting a drive source bus and a reverse source bus connected respectively through a drive switch and a reverse switch with a power souce to respective inductors through counter flow block diodes. CONSTITUTION:When a drive source switch SF is turned ON, voltage is applied onto a drive source bus 6 and diodes DF1-DF4 are biased forwardly. Since drive switches SFU1-SF4 are tuned ON at this time, current flows in the direction of solid line arrows through respective inductors L1-L4 of a linear motor, and the linear motor is driven forward. When a reverse source switch SB is turned ON, voltage is fed to a reverse source bus 7 and diodes DB1-DB4 are biased forwardly. Since reverse switches SB1-SD4 are turned ON at this time, current flows in the direction of dashed line arrows through respective inductors L1-L4, so as to drive the linear motor reversely.

6. 发明专利

JPS6268317A HIGH VOLTAGE SWITCHING CIRCUIT 失效
公开(公告)号：JPS6268317A
公开(公告)日：1987-03-28
申请号：JP20653785
申请日：1985-09-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YUZAWA NOBORU , KAWAMOTO KOJI , SHIMURA TATSUO , KARIYA TADAAKI
IPC分类号： H03K17/10 , H03K17/73
摘要： PURPOSE:To facilitate the semiconductor circuit integration by using a semiconductor element having a self hold function as a switching element of a power supply side of each channel and providing a switch between the said switching element and the power supply so as to attain on/off control with less drive power. CONSTITUTION:A control signal is given to an NMOS transistor (TR) synchronously with a signal controlling an output voltage changeover timing of plural channels given at input terminals Son, Soff of an NPN TR 13. Further, a signal is given to control terminals Sion, Sioff of NMOS TRs 15a, 15b, 14a, 14b at each channel. Thus, most of the drive current of the switching element of a high voltage part is applied from a low voltage power supply and as to the on-drive current of a thyristor 11 applied from a high voltage power supply, as one for plural channels. Further, as to the signals to the terminals Son, Sion, an H level is given during the on-period, but since the element driven by the said signal is a thyristor, which has the self-hold function and the drive power is reduced further by pulsizing the said signal.

7. 发明专利

JPS61277226A DRIVING CIRCUIT FOR SWITCHING SEMICONDUCTOR ELEMENT 失效
公开(公告)号：JPS61277226A
公开(公告)日：1986-12-08
申请号：JP11882785
申请日：1985-06-03
申请人： HITACHI LTD , HITACHI HARAMACHI SEMI CONDUCT
发明人： SUGAYAMA SHIGERU , KARIYA TADAAKI , SHIMURA TATSUO , TOMITA SHIGEO
IPC分类号： H03K17/687 , H03K17/06
摘要： PURPOSE:To obtain a high DC voltage by multiplexing a floating circuit part. CONSTITUTION:When a clock signal as a symmetrical square wave voltage of high frequency is inputted to an input terminal 110 of an inverter circuit 109, a square wave voltage different in phase from the input signal by 180 deg. appears as the output voltage. The input-side voltage and the output-side voltage are applied to capacitors 101 and 102, and charging/discharging currents are flowed to capacitors 101 and 102. At this time, a DC voltage with a terminal 113 as the positive is obtained in both ends of a resistor 107. Similarly, charging/ discharging currents are flowed to capacitors 103 and 104 in both ends of a resistor 108 and are rectified by a single phase diode bridge 106, and a DC voltage with a terminal 114 as the positive is generated. Thus, a driving voltage of a switching semiconductor element of high floating is obtained.

8. 发明专利

JPS6128218A Switching circuit 失效
标题翻译：切换电路
公开(公告)号：JPS6128218A
公开(公告)日：1986-02-07
申请号：JP15013784
申请日：1984-07-18
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： YUZAWA NOBORU , OKUTSU MITSUHIKO , SHIMURA TATSUO , KARIYA TADAAKI
IPC分类号： H03K17/16 , H03K17/732
CPC分类号： H03K17/732
摘要： PURPOSE:To attain ease of circuit integration with simple circuit constitution by providing a semiconductor control rectifier element having a main terminal connected to one end of a load, other main terminal connected to a reference potential and a control terminal, a switching element whose main terminal is connected to a control terminal and to other terminal of a load and a p-n junction element connected between the other terminal of load and a reference potential. CONSTITUTION:When the energy of a solenoid 1 is circulated, a potential at other point P of the solenoid is lowered to a reference potential by a forward drop's share of a diode 4. Then a switching element 7 is inserted between a gate G of the thyristor 5 and other end P of solenoid and it is possible to draw a current from the gate of the thyristor 5. An on-voltage of the switching element 7 given externally is permitted to a value being a sum between the on-voltage between the gate G and the cathode K of the thyristor 5 and the on-voltage of a circulating diode 4, then high on-voltage (e.g., thyristor) element as the 1st switching element 7 is applied.
摘要翻译：目的：通过提供一个半导体控制整流元件，通过提供一个连接到负载的一端的主端子，连接到参考电位的另一个主端子和一个控制端子来实现简单的电路结构，开关元件的主端子连接到负载的另一端子和负载的另一端子与参考电位之间的pn结元件的控制端子和其他端子。构成：当螺线管1的能量循环时，螺线管的其他点P处的电位通过二极管4的正向压降而降低到参考电位。然后，开关元件7插入到晶闸管5和螺线管的其他端部P，并且可以从晶闸管5的栅极引出电流。允许外部给定的开关元件7的导通电压为值之间的导通电压栅极G和晶闸管5的阴极K和循环二极管4的导通电压，然后施加作为第一开关元件7的高导通电压（例如，晶闸管）元件。

9. 发明专利

JPS60208116A DRIVE CIRCUIT FOR CAPACITIVE LOAD 失效
公开(公告)号：JPS60208116A
公开(公告)日：1985-10-19
申请号：JP6501484
申请日：1984-03-30
申请人： HITACHI LTD
发明人： WADA MASAYUKI , KARIYA TADAAKI , KUROSE NOBUAKI , SHIMURA TATSUO
IPC分类号： H03K17/62
摘要： PURPOSE:To obtain a pulse generating circuit of low power consumption by using a part of a drive circuit of plural capacitive loads such as piezoelectric elements over >=2 channels in common so as to simplify the circuit constitution without losing the high speed performance of the drive circuit. CONSTITUTION:When all input terminals 41-43 are at an L level, all the 1st switches 11-13 are turned off, the 3nd switch 2 is turned on by an output of a NOR circuit 9 and capacitive loads 81-83 such as piezoelectric elements are charged via buffer devices 31-33. When the input terminal 41 goes to an H level, the 2nd switch 2 is turned off, the electric charge of the load 81 is discharged and this state is repeated further. Thus, a voltage pulse where the level of an output terminal changes from H L is obtained by the change of the input signal level from L H and the constitution is simplified by using in common a part of the drive circuit of the >=2 capacitive loads.

10. 发明专利

JPS6014517A PULSE VOLTAGE GENERATING CIRCUIT 失效
公开(公告)号：JPS6014517A
公开(公告)日：1985-01-25
申请号：JP12254383
申请日：1983-07-05
申请人： HITACHI LTD
发明人： SAGAWA AKIO , IZAKI NAOYUKI , SUZUKI MASAYOSHI , WADA MASAYUKI , SHIMURA TATSUO , KARIYA TADAAKI
IPC分类号： H03K3/02 , H03K17/60
摘要： PURPOSE:To stabilize a constant current and a rise time and a breaking time by providing an electronic switch for a base terminal of a constant current source circuit. CONSTITUTION:In constant current source circuits 20' and 30' of this invention, electronic switch circuits 28 and 38 are added to conventional constant current source circuits 20 and 30, and a constant current is turned on and off by these switch operations. When an input signal VIN is in the low level in the constant current source circuit 20', the transistor TR28 operating as the electronic switch is turned off, and a divided voltage of a power source VCC is given to the base of a TR21, and a constant current if is flowed. When the input signal VIN becomes on a high level ''H'', the TR28 is turned on, and the constant current if is not flowed, and a pulse voltage VOUT is generated. In this case, rise time tr and breaking time tf of the output pulse voltage are not affected because a constant current value is set independently of the crest value of the input signal VIN.

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