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1. 发明专利

JPS6465906A AMPLIFIER CIRCUIT 失效
公开(公告)号：JPS6465906A
公开(公告)日：1989-03-13
申请号：JP22160087
申请日：1987-09-04
申请人： HITACHI LTD , HITACHI VLSI ENG
发明人： IRIKURA SHOGO , TSUJI KOSUKE , KAMEYAMA SADAFUMI , BABA TERUYOSHI , OURA TAKAYUKI
IPC分类号： H03F3/343 , H03F3/34
摘要： PURPOSE:To reduce the dependency upon a power source voltage variation of an output voltage without being influenced on an amplification factor by making an input transistor let a current corresponding to an input voltage flow from a coupling node with a load element, and further, letting the current corresponding to the change of the power source voltage flow from said coupling node by the action of a second current source. CONSTITUTION:The second current source BCS causes a current change corresponding to the change of the power source voltage Vcc between the coupling node ND and a second power source terminal VEE, and generates a potential difference, scarecely dependent upon the change of the power source voltage Vcc, at both ends of a load resistance RL. Then, it lets the current Ibias having a tendency to cancel the voltage difference variation of both ends of the load resistance RL according to the variation of the power source voltage Vcc flow. Namely, it the power source voltage Vcc is raised or lowered higher/lower than a reference potential, the current Ibias is increased or decreased by a portion necessitated to cancel the rise portion of the drop portion of the output voltage Vout according to the change of the power source voltage Vcc. Accordingly, the dependency upon the power source voltage variation of the output voltage is lowered without being influenced upon the amplification factor.

2. 发明专利

JPS62165958A SOCKET FOR MEASURING ELECTRIC CHARACTERISTICS OF SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPS62165958A
公开(公告)日：1987-07-22
申请号：JP646286
申请日：1986-01-17
申请人： HITACHI VLSI ENG , HITACHI LTD
发明人： BABA TERUYOSHI , MIZUE KATSUYA , SONODA YASUHIRO , OURA TAKAYUKI , IRIKURA SHOGO
IPC分类号： G01R31/26 , G01R31/28 , H01L23/32 , H01R33/76
摘要： PURPOSE:To accurately measure the high frequency characteristics and the like of a semiconductor device by so composing that forces are operated to the inserting and perpendicular directions of the device to connect its lead pin to a socket. CONSTITUTION:When the electrode 12B of a chip carrier 12 is placed on the end 10A of the lead pin 10 provided at a socket body 15 and a cover 11 is closed, the pin 10 is engaged with the groove 12A on the side of the carrier 12, the electrode 12B is pressed by the end 10A of the pin to a carrier inserting direction and a perpendicular direction, supported by a supporting portion 12C, and mechanically and electrically effectively bonded. When the lower portion 10D of the pin is linearly minimized in size, the electric capacity, inductance and resistance value of the socket can be reduced to minimize the influence at the time of measuring characteristics.

3. 发明专利

JPS59191911A Differential amplifying circuit 失效
标题翻译：差分放大电路
公开(公告)号：JPS59191911A
公开(公告)日：1984-10-31
申请号：JP6533883
申请日：1983-04-15
申请人： Hitachi Ltd , Hitachi Micro Comput Eng Ltd
发明人： HIKASA KAZUHIKO , KACHI TADAO , SEKINE YASUSHI , OURA TAKAYUKI
IPC分类号： H03F3/45 , H03G1/00
CPC分类号： H03G1/0023
摘要： PURPOSE:To control simply the amplification factor of a differential amplifying circuit with no trimming of a resistance which requires a complicated and exclusive device, by attaining the variable setting of constant current value for a constant current source which limits a working current flowing in common to a pair of active elements. CONSTITUTION:A differential amplifying circuit consists of a pair of transistors TRQ1 and Q2 connected with a load resistance RC respectively and a constant current source 10 which controls a working current flowing in common to the TRQ1 and Q2. Plural constant current circuits consisting of TRQ3, Q4... and resistances R3, R4... connected in series to the emitters of said transistors are connected in series to each other to constitute the source 10. Then an optional constant current circuit selected by operation signals e1, e2... sent from outside and supplied to the bases of the TRQ3, Q4... is actuated. Thus the constant current value is set variably. Thus the amplification factor is controlled variably for the differential amplifying circuit.
摘要翻译：目的：为了简单地控制差分放大电路的放大系数，不需要修复需要复杂和排他的器件的电阻，通过实现恒定电流源的恒定电流值的可变设置，这限制了共同流动的工作电流一对活跃元素。构成：差分放大电路由一对分别与负载电阻RC连接的晶体管TRQ1和Q2组成，恒流源10控制工作电流共同流向TRQ1和Q2。由串联连接到所述晶体管的发射极的TRQ3，Q4 ...和电阻R3，R4 ...组成的多个恒流电路彼此串联连接以构成源极10.然后，选择一个可选的恒流电路从外部发送并提供给TRQ3，Q4 ...的基座的操作信号e1，e2 ...被致动。因此恒定电流值是可变的。因此，对差分放大电路可变地控制放大系数。

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