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1. 发明专利

JPH0588007B2 失效
公开(公告)号：JPH0588007B2
公开(公告)日：1993-12-20
申请号：JP22197986
申请日：1986-09-22
申请人： HITACHI LTD
发明人： YAMAMURA HIDEHO , SAITO TAKASHI
IPC分类号： H03F3/72 , H03F1/02 , H03K17/74

2. 发明专利

JPS60103822A DELAY CIRCUIT 失效
公开(公告)号：JPS60103822A
公开(公告)日：1985-06-08
申请号：JP21097783
申请日：1983-11-11
申请人： HITACHI LTD , HITACHI ELECTR ENG
发明人： NIIZAKI SHINYA , SAITOU TAKASHI , YAMAMURA HIDEHO , HAYASHI SHINICHI
IPC分类号： H03K5/00 , H03K5/13 , H03K5/133
摘要： PURPOSE:To obtain a delay circuit in which a maximum variable delay time is set optionally by providing a waveform shaping circuit having an output stage of open emitter and a comparator circuit comparing the output of waveform shaping circuit with a reference voltage in response to a desired delay time and obtaining an output pulse giving a desired delay time to the front edge or the rear edge to decrease the control voltage. CONSTITUTION:An IC1 is a comparator (or line receiver) whose output stage is open emitter and a constant current circuit CG and a capacitor C are connected to the output terminal. An IC2 is a comparator (or line receiver) with a high input impedance, an output of the comparator IC1 is connected to one input terminal E and a DC reference voltage Vref is applied to the other input terminal F. The constant current circuit CG can be a circuit comprising an operatonal amplifier IC, a transistor Q and a resistor R, the maximum variable delay time is set optionally and the delay time of the front edge and rear edge of an input pulse waveform is set independently.

3. 发明专利

JPS5989003A MULTI-LAYER CIRCUIT OF THICK FILM AND ITS PRODUCTION 失效
公开(公告)号：JPS5989003A
公开(公告)日：1984-05-23
申请号：JP19747882
申请日：1982-11-12
申请人： HITACHI LTD
发明人： KAWAMOTO KAZUTAMI , YAMAMURA HIDEHO
IPC分类号： H05K3/46 , H01L27/01 , H01P11/00 , H05K1/00 , H05K1/09 , H05K1/16
摘要： PURPOSE:To miniaturize a multi-layer circuit by forming a multi-layer structure of an insulated material which is sintered through a heat treatment at a low temperature in the form of a circuit board material and an inter-layer insulating material. CONSTITUTION:A green sheet which has a prescribed specific dielectric constant and is sintered at

4. 发明专利

JPH0585083B2 失效
公开(公告)号：JPH0585083B2
公开(公告)日：1993-12-06
申请号：JP1381286
申请日：1986-01-27
申请人： HITACHI LTD
发明人： SAITO TAKASHI , YAMAMURA HIDEHO
IPC分类号： H03F1/42 , H03F3/04 , H03F3/50

5. 发明专利

JPS6355178B2 失效
公开(公告)号：JPS6355178B2
公开(公告)日：1988-11-01
申请号：JP6105082
申请日：1982-04-14
申请人： HITACHI LTD
发明人： NIIZAKI SHINYA , YAMAMURA HIDEHO , SAITO TAKASHI
IPC分类号： H01H36/00 , H01H1/66 , H01H51/29

6. 发明专利

JPS60136404A AMPLIFYING CIRCUIT 失效
公开(公告)号：JPS60136404A
公开(公告)日：1985-07-19
申请号：JP24404583
申请日：1983-12-26
申请人： HITACHI LTD , HITACHI ELECTR ENG
发明人： YAMAMURA HIDEHO , NIIZAKI SHINYA , KAWASAKI KENJI
IPC分类号： H03F1/34 , H03F1/42
摘要： PURPOSE:To realize low output impedance in a wide frequency range by setting the frequency characteristic of the voltage gain of a voltage amplifying part to lag-lead type. CONSTITUTION:A voltage amplifying part AMP consisting of an operational amlifier, a current amplifying part CB having diamond circuit constitution, etc. are provided. A capacitor CL and negative feedback resistances R1 and R2 are connected to the output stage of the current amplifying part CB, and a divided output voltage due to these resistances is fed back to the inverted input terminal of the operational amplifier. The capacitor CL constitutes an integrating circuit together with an internal resistance (R) of the current amplifying part CB. Two poles are provided in the transfer characteristic by the operational amplifier and this integrating circuit, and a peak is generated in the output impedance by f0= 1/(2piCLr), and therefore, the output is fed back to the operational amplifier itself by capacitors C1 and C2 and a resistance R3, and the transfer characteristic is set to lag-lead type to reduce this peak of the output impedance.

7. 发明专利

JPS60239153A WAVEFORM TRANSMITTER 失效
公开(公告)号：JPS60239153A
公开(公告)日：1985-11-28
申请号：JP9454084
申请日：1984-05-14
申请人： HITACHI LTD
发明人： YAMAMURA HIDEHO , NIIZAKI SHINYA
IPC分类号： H04L25/03 , H04L25/02
摘要： PURPOSE:To realize the improvement of the speed of a transmission signal and the voltage accuracy in a multi-function circuit by forming a pi or T type low pass filter in a transmission line between a measuring system and a system to be measured and employing a capacitor to the components. CONSTITUTION:The M side is a pulse oscillator side and the output side of the N side is a measuring instrument side. A microstrip line 10 is a line provided between the signal oscillator and a waveform supervisory circuit and a line 11 is a line between a switch and an output terminal. The lines 10, 11 are lines with desired characteristic impedance. A microstrip line 12 has a higher characteristic impedance than those of the lines 10, 11. The capacitors 13, 14 represent respectively the input capacitance of the said switch. The said oscillator generates a waveform of a single frequency being not a sinusoidal wave. The LPF has a characteristic of maximum flat type. Since no deviation of loss or phase is caused in the pass band, the maximum effect is attained.

8. 发明专利

JPS6014513A NONLINEAR DIFFERENTIAL AMPLIFYING CIRCUIT 失效
公开(公告)号：JPS6014513A
公开(公告)日：1985-01-25
申请号：JP12163183
申请日：1983-07-06
申请人： HITACHI LTD
发明人： YAMAMURA HIDEHO , NIIZAKI SHINYA
IPC分类号： H03F3/45
摘要： PURPOSE:To constitute AND and OR with equal numbers of elements and equal conceptions to realize a high-speed logic circuit where the propagation delay time is equal between AND and OR, by forming a nonlinear differential amplifying circuit with a pair of transistors TRs and a pair of diodes to realize a high-speed gate circuit having a complicated operating function. CONSTITUTION:When the potential of an input terminal IT1 is higher than that of an input terminal IT2, only a TR T1 is made conductive, and an equal potential V1 is obtained in output terminals OT1 and OT2 by the action of diodes D1 and D2 (state S1). Meanwhile, when the potential of the terminal IT2 is higher than that of the terminal IT1, the potential of the terminal OT1, is equal to a power source voltage VCC by the nonlinearity of the diode D2, and the potential of the terminal OT2 is a value V2 obtained by subtracting the voltage drop of a load resistance R2 form the power source voltage VCC (state S2). In the state S1, one potential V1 is obtained in output terminals OT1 and OT2; and in the state S2, potentials VCC and V2 are obtained, and as the result, three kinds of potential are obtained as the total. If load resistances R1 and R2 have the same value, the potential V1 is an additive average of potentials VCC and V2, and differences (VCC-V1) and (V1-V2) of three kinds of potential are equal to each other.

9. 发明专利

JPS59180379A Method and device for measuring input offset voltage 失效
标题翻译：用于测量输入偏置电压的方法和装置
公开(公告)号：JPS59180379A
公开(公告)日：1984-10-13
申请号：JP5383083
申请日：1983-03-31
申请人： Hitachi Ltd
发明人： YAMAMURA HIDEHO , NIIZAKI SHINYA
IPC分类号： G01R31/28 , G01R31/316 , H03F3/34
CPC分类号： G01R31/2837
摘要： PURPOSE:To realize versatile application for various circuits by small-sized, simple constitution and perform high-speed measurement by inputting a periodic waveform, measuring the duty ratio of an output waveform, and deciding on an input offset voltage. CONSTITUTION:The periodic waveform from a periodic waveform generator 8, when inputted to the comparator 7, etc., of a circuit to be measured, is compared with the input offset voltage that the comparator 7 has, and the comparator 7 outputs a waveform with a duty ratio corresponding to the input offset voltage. The duty ratio of this output waveform is measured by a duty ratio measuring instrument 9 to determine the input offset voltage. Therefore, the simple, small-sized constitution which eliminates the need for a negative feedback circuit, etc., while using a high-grain comparator allows the versatile application for various circuits including a comparator and the input offset voltage is measured speedily.
摘要翻译：目的：通过小型，简单的结构实现各种电路的多功能应用，通过输入周期波形，测量输出波形的占空比，确定输入失调电压，进行高速测量。构成：将来自周期性波形发生器8的周期波形当输入到比较器7等待测量的电路与比较器7具有的输入偏移电压进行比较时，比较器7输出具有对应于输入偏移电压的占空比。该输出波形的占空比由占空比测量仪9测量以确定输入偏移电压。因此，在使用高晶粒比较器的同时，消除了对负反馈电路等的需要的简单的小尺寸结构允许对包括比较器在内的各种电路和输入偏移电压的通用应用进行快速测量。

10. 发明专利

JPS59148289A Connector 失效
公开(公告)号：JPS59148289A
公开(公告)日：1984-08-24
申请号：JP2142583
申请日：1983-02-14
申请人： Hitachi Ltd
发明人： MUTOU MASAAKI , NIIZAKI SHINYA , YAMAMURA HIDEHO
IPC分类号： H01R12/71 , H01R24/00

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