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1. 发明专利

JPS61244264A MULTI-OUTPUT DC VOLTAGE CONVERTING CIRCUIT 失效
公开(公告)号：JPS61244264A
公开(公告)日：1986-10-30
申请号：JP8237085
申请日：1985-04-19
申请人： HITACHI LTD
发明人： KUROKI YOSHINORI , ONDA KENICHI , OKUHARA SHINJI
IPC分类号： H02M3/28
摘要： PURPOSE:To reduce power loss and soften thermal damage, by opening one circuit for output side windings before turning OFF a main switch provided on the input side of a transformer. CONSTITUTION:In order to obtain double output from single DC input voltage Ei, the input side of a transformer T having a plurality of output side windings is provided with a main switch Q1, and the output side windings are provided with rectifying diodes D11, D12 and the like. Besides, on one side, an auxiliary switch Q2 is provided in series to stabilize DC output voltage furthermore. Besides, between the auxiliary switch Q2 and the rectifying diode D21 a capacitive element Cr is provided. Then, the auxiliary switch Q2 is conducted after the main switch Q1 provided for the input side of the transformer T is conducted, and the switch Q2 is controlled to be interrupted before the main switch Q1 is interrupted. Surge voltage due to the transformer T at the moment when the auxiliary switch Q2 is interrupted, is absorbed by the capacitive element Cr, and excessive voltage is arranged not to be applied to the auxiliary switch Q2*..

2. 发明专利

JPH08316951A RADIO COMMUNICATION TERMINAL, RADIO BASE STATION, AND COMMUNICATION SYSTEM PROVIDED WITH THEM 失效
公开(公告)号：JPH08316951A
公开(公告)日：1996-11-29
申请号：JP12336995
申请日：1995-05-23
申请人： HITACHI LTD
发明人： KOIDE AYUMI , KUROKI YOSHINORI
IPC分类号： H04B14/04 , G09C1/00 , H04L9/06 , H04L9/14 , H04W12/10 , H04Q7/38
摘要： PURPOSE: To provide an attachable/detachable storage device and a radio communication terminal which flexibly and easily copes with new ciphering or the like by the attachable/detachable storage device where ciphering algorithms are stored. CONSTITUTION: An attachable/detachable storage part 115 where plural ciphering algorithms, identifiers corresponding to these ciphering algorithms in 1:1, and a ciphering table showing the correspondence relations between these identifiers and ciphering algorithms are stored is set to a setting part 116 where it can be set without opening the main body cover. An ciphering algorithm is selected by a cipher selection part 110, and voice data is ciphered in a ciphering part 104 based on the arbitrary selected ciphering algorithm to output a cipher text. A cipher data block generation part 105 refers to the ciphering table to read out the identifier corresponding to the selected ciphering algorithm and adds it to the cipher to output a cipher data block.

3. 发明专利

JPH08163624A RADIO CALLING SYSTEM 失效
公开(公告)号：JPH08163624A
公开(公告)日：1996-06-21
申请号：JP29924394
申请日：1994-12-02
申请人： HITACHI LTD
发明人： KUROKI YOSHINORI , SUZUKI TOSHIRO , KOIDE AYUMI , KOJIMA KIMIFUMI , KIHINOKI YASUO
IPC分类号： G01S19/14 , H04W24/04 , H04W56/00 , H04W92/12 , H04W92/20 , H04Q7/16 , G01S5/14 , H04Q7/36
摘要： PURPOSE: To easily synchronize all transmitting stations with excellent precision by sending a received message from a transmitter exactly as specified with the time added to the message. CONSTITUTION: Each transmitting station 2 clocks its current time by adding the delay time required from the transmission of a reference station selected among transmitting stations 2 to the reception of this station to the time received from the reference station. To find the delay time required from the transmission of the reference station to the reception of this station. the reference time clocked at the reference station based on the information on time received from a satellite by radio is sent by radio to the respective transmitting stations 2, each of which clocks current time to be referred to based on the information on time received from the satellite by radio and finds the delay time required from the transmission of the reference station to the reception of the transmitting station 2 from the difference between the reference time sent from the reference time and the time to be referred to at the point of time when the reference time is received.

4. 发明专利

JPS61273172A STORAGE CARRIER DRAWING CIRCUIT OF DC VOLTAGE CONVERTER 失效
公开(公告)号：JPS61273172A
公开(公告)日：1986-12-03
申请号：JP11409785
申请日：1985-05-29
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： KUROKI YOSHINORI , SUEHIRO KOJI , ENDO TERUHIKO , KAWASHIMA MASAHARU
IPC分类号： H02M3/155 , H02M3/28
摘要： PURPOSE:To reduce the cost and the heating by forming the second switch of a bipolar transistor for stabilizing power, and discharging a storage carrier at switching time by the flyback voltage of a transformer. CONSTITUTION:In a forward type DC voltage converter, a series circuit of a switch 3 and he primary winding 41 of a transformer 4 and a series circuit of a diode 2 and a feedback winding 42 are connected in parallel with a DC power source 1. The secondary windings 43, 44 of the transformer 4 and diodes 5, 6 are connected in series, and bipolar transistors are connected in series as the secondary side switch 7 between the anode of the diode 5 and the cathode of the diode 6 and between the other ends of the both windings 43 and 44. Thus, the flyback voltage of the transformer 4 is applied between the base and the collector of the transistor 7 at switch 3 OFF time to draw the carrier storage by the voltage.

5. 发明专利

JPS6194564A Switching regulator 失效
标题翻译：开关稳压器
公开(公告)号：JPS6194564A
公开(公告)日：1986-05-13
申请号：JP21437684
申请日：1984-10-15
申请人： Hitachi Ltd
发明人： KAWASHIMA MASAHARU , SUEHIRO KOJI , ENDO TERUHIKO , KUROKI YOSHINORI , YUGAWA NAOTOSHI
IPC分类号： H02M3/28
CPC分类号： H02M3/28
摘要： PURPOSE:To eliminate the generation of an abnormal heat by suppressing a rush current to a smoothing condenser by a transistor at a power source energizing time. CONSTITUTION:When a power source is turned ON, a transistor Q1 is conducted to charge a capacitor C1. When the capacitor C1 is charged, power is supplied from an auxiliary power source to a pulse width controller PWMC, and a main transistor Q2 starts switching. The transistor Q1 is bypassed by a thyristor TH except the initial time of the power source energizing time, and a current is made almost not to flow to the transistor Q1. In other words, a gate trigger voltage is applied to the thyristor TH through a gate trigger circuit made of a diode D1 and resistors R3, R4 by the switching of the transistor Q2, and the thyristor TH is set to conductive state.
摘要翻译：目的：通过在电源通电时间内抑制晶体管对平滑电容器的冲击电流来消除异常发热的产生。构成：当电源接通时，导通晶体管Q1以对电容器C1充电。当电容器C1充电时，从辅助电源向脉冲宽度控制器PWMC供电，主晶体管Q2开始切换。除了电源通电时间的初始时间之外，晶体管Q1被晶闸管TH旁路，并且几乎不使电流流向晶体管Q1。换句话说，通过晶体管Q2的切换，通过由二极管D1和电阻器R3，R4构成的栅极触发电路将栅极触发电压施加到晶闸管TH，并且晶闸管TH被设置为导通状态。

6. 发明专利

JPS6039366A MULTIOUTPUT DC VOLTAGE CONVERTING CIRCUIT 失效
公开(公告)号：JPS6039366A
公开(公告)日：1985-03-01
申请号：JP14646083
申请日：1983-08-12
申请人： HITACHI LTD
发明人： KUROKI YOSHINORI , ONDA KENICHI , OKUHARA SHINJI
IPC分类号： H02M3/28
摘要： PURPOSE:To reduce power loss when the current of a main switch is interrupted by releasing at least one circuit in an output side winding before a main switch provided at the input side of a transformer is turned OFF. CONSTITUTION:An auxiliary switch Q2 provided at the output side of a transformer T is controlled to switch at a timing relation that is conducted after a main switch Q1 provided at the input side of the transformer T becomes conductive and interrupted before the switch Q1 is interrupted. Thus, the switching loss of the switch Q1 can be reduced. A surge voltage caused by a leakage inductance of the transformer T at the moment that the switch Q2 is interrupted operates to charge a capacitive element Cr, and the surge voltage is absorbed so as not to apply excess voltage to the switch Q2.

7. 发明专利

JPS57123719A Variable reference voltage type comparator 失效
标题翻译：可变参考电压型比较器
公开(公告)号：JPS57123719A
公开(公告)日：1982-08-02
申请号：JP792381
申请日：1981-01-23
申请人： Hitachi Ltd , Nippon Telegr & Teleph Corp
发明人： KUROKI YOSHINORI , KITANO JIYUNJIROU , OHIGATA ICHIROU , KAWARADA KUNIYASU , HAYASHI TOSHIO
IPC分类号： H03K3/013 , H03K3/0233 , H03K5/08
CPC分类号： H03K3/02337
摘要： PURPOSE:To prevent oscillation by performing switching operation fast by composing the 2nd switch of an equivalent PNPN switch circuit in a comparator which has hysteresis characteristics through the switching of the 1st and 2nd switches. CONSTITUTION:When an input voltage E is higher than a reference voltage Vt1 obtained through the voltage division of resistances R11 and R12, a transistor TR11 turns on, a TR12 turns off, and a TR17, therefore, turns off, so that any voltage is developed at an output terminal. When the voltage drops below the voltage Vt1, the TR11 turns off and the TR12 also turns off. This inversion is performed rapidly because a TR13 constituting an equivalent PNPN switch circuit also operates in cooperation, and a resistance R13 is inserted in parallel to the R11, so that the reference voltage applied to the base of the TR12 rises up to a Vt2. When the voltage E rises above the voltage Vt2, the TR11 turns on, and the TRs 12, 13 and 17 turn off to make the reference voltage drop down to the Vt1, ceasing the output voltage. The switching of the reference voltage is performed simultaneously with the on-off operation of the TR12, so oscillation never occurs.
摘要翻译：目的：通过组合比较器中的等效PNPN开关电路的第二个开关，通过第一和第二开关的切换具有滞后特性，可以快速执行开关操作，以防止振荡。构成：当输入电压E高于通过电阻R11和R12的分压获得的参考电压Vt1时，晶体管TR11导通，TR12截止，因此TR17截止，使得任何电压为在输出端开发。当电压低于电压Vt1时，TR11关闭，TR12也关闭。由于构成等效PNPN开关电路的TR13也协同工作，因此快速执行该反转，并且并联R11插入电阻R13，使得施加到TR12的基极的参考电压上升到Vt2。当电压E上升到电压Vt2以上时，TR11导通，TRs 12,13和17关断，使参考电压下降到Vt1，停止输出电压。参考电压的切换与TR12的开关操作同时进行，因此不会发生振荡。

8. 发明专利

JPH0528069B2 失效
公开(公告)号：JPH0528069B2
公开(公告)日：1993-04-23
申请号：JP21437684
申请日：1984-10-15
申请人： HITACHI LTD
发明人： KAWASHIMA MASAHARU , SUEHIRO KOJI , ENDO TERUHIKO , KUROKI YOSHINORI , YUGAWA NAOTOSHI
IPC分类号： H02M3/28

9. 发明专利

JPS62126863A RINGING CHOKE CONVERTER 失效
公开(公告)号：JPS62126863A
公开(公告)日：1987-06-09
申请号：JP26376385
申请日：1985-11-26
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： KAWASHIMA MASAHARU , SUEHIRO KOJI , ENDO TERUHIKO , KUROKI YOSHINORI , KOMATSU MASAYUKI
IPC分类号： H02M3/338 , H02M3/335
摘要： PURPOSE:To quickly stop an oscillation of a ringing choke converter by providing means for turning a main transistor OFF by interrupting a feedback circuit when an input voltage is a predetermined value or lower. CONSTITUTION:When an input voltage is a predetermined value or higher, a transistor 1 repeats ON and OFF. When after the transistor 1 starts an ON and OFF operation, an input voltage drops and a voltage generated in a winding n3 during ON period of the transistor 1 becomes smaller than the sum of the Zener voltage of a Zener diode 15 and the base-emitter saturated voltage of a sub transistor 17, the transistor 17 becomes OFF. Accordingly, when the transistor 1 is OFF, the secondary current of the transistor 2 becomes zero. Thus, even if a voltage is generated in the secondary winding n2 by a surge, since the transistor 17 is OFF, the transistor 1 does not become ON. Thus, a ringing choke converter can be positively stopped.

10. 发明专利

JPS61218365A SWITCHING REGULATOR 失效
公开(公告)号：JPS61218365A
公开(公告)日：1986-09-27
申请号：JP5757785
申请日：1985-03-23
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： KAWASHIMA MASAHARU , SUEHIRO KOJI , ENDO TERUHIKO , KUROKI YOSHINORI , TSUJI HIROKUNI
IPC分类号： H02M3/28
摘要： PURPOSE:To supply a sufficient base current with a simple circuit configuration by supplying a base current of an output stabilizing control bipolar transistor provided at the secondary side of a converter transformer from the transformer. CONSTITUTION:When two types of more DC outputs are generated at the secondary sides of a converter transformer 4 and at least one of them is stabilized by the pulse width control of a bipolar transistor 11, another secondary winding 8 is further provided at the secondary side of the transformer 4. The base current of the transistor 11 is supplied from the winding 8. Thus, since a sufficient base current can be supplied and another power source is not necessary, the size and the weight of the entirety can be reduced.

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