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1. 发明专利

JPH10269510A READ AMPLIFIER CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT 失效
公开(公告)号：JPH10269510A
公开(公告)日：1998-10-09
申请号：JP7600597
申请日：1997-03-27
申请人： HITACHI LTD , HITACHI INFORMATION TECHNOLOGY , HITACHI COMMUNICATION SYSTEM , HITACHI VLSI ENG
发明人： HIROSE TAKESHI , NAGAYA YUJI , HASHIMOTO TAKASHI , YOSHINAGA MAKI , HATANAKA NORIAKI , SOGA YUJI , MORIYA ATSUSHI , MOCHIZUKI TAKEO , KAMEYAMA SADAFUMI
IPC分类号： G11B5/09 , G11B5/02 , H03F3/68
摘要： PROBLEM TO BE SOLVED: To reduce the parasitic capacitance to be connected to each emitter and the noise caused by the base resistance of the transistors for a cascade connection by plurally dividing the cascade connected transistors and connecting a few transistors for a head bias to each emitter. SOLUTION: The collectors of five transistors are connected to the emitter of an upper stage cascade connection transistor Q1. The parasitic capacitance associated with the emitter of the transistor Q1 is 5×Cb and the parasitic capacitance associated with the emitters of lower stage cascade connection transistors Q11 to Q15 becomes 5×CA. Noises generated by the base resistances of the transistors Q1 and the transistors Q11 to Q15 are equal and set to Vn. If the sizes of the transistors Q11 to Q15 and head bias transistors Qb1 to Qb10 are the same and parasitic capacitances of the emitters are CA=Cb, the noise in the read amplifier is reduced to an approximately 1/2 value and the noise reduction effect is obtained at a higher frequency band.

2. 发明专利

JPH09219004A MAGNETIC HEAD DRIVING CIRCUIT 失效
公开(公告)号：JPH09219004A
公开(公告)日：1997-08-19
申请号：JP5246296
申请日：1996-02-14
申请人： HITACHI LTD , HITACHI COMPUTER ENG , HITACHI COMMUNICATION SYSTEM
发明人： NAGAYA YUJI , YOSHINAGA MAKI , HATANAKA NORIAKI , MOCHIZUKI TAKEO , MORIYA ATSUSHI
IPC分类号： G11B5/09 , G11B5/00 , G11B5/02 , G11B19/02
摘要： PROBLEM TO BE SOLVED: To obtain a magnetic head driving circuit which can write data at high speed by providing the circuit with an auxiliary current source passing a current transiently only at the initial stage at the time of switching a direction of a current flowing in a magnetic head. SOLUTION: Auxiliary current sources SC1, SC2 connected to head terminals X, Y are turned on and turned off by data signals D, the inverse of D in the same way as main current sources MC1, MC2. And when current detecting circuits CD1, CD2 detect a current started to flow in the main current sources MC1, MC2, the auxiliary current sources SC1, SC2 are quickly turned off. Thereby, a current can be increased transiently at the time of switching a direction of a current flowing in a magnetic head L at the time of writing data. Therefore, data can be written at high speed in a magnetic storage device by improving a variation rate of a writing current and shortening a switching time of a writing current.

3. 发明专利

JPH08160092A SEMICONDUCTOR INTEGRATED CIRCUIT 失效
公开(公告)号：JPH08160092A
公开(公告)日：1996-06-21
申请号：JP29743994
申请日：1994-11-30
申请人： HITACHI LTD , HITACHI COMPUTER ENG
发明人： HIROSE TAKESHI , NAGAYA YUJI , HASHIMOTO TAKASHI , YOSHINAGA MAKI , HATANAKA NORIAKI , SOGA YUJI , MORIYA ATSUSHI
IPC分类号： G01R31/26 , G01R31/02 , H01L21/66 , H01L21/822 , H01L27/04
摘要： PURPOSE: To surely detect head opening abhormality by counting the time during which the voltage between head terminals is lower than a prescribed slicing level and comparing the count value with a preset value. CONSTITUTION: When head opening abnormality occurs, a voltage waveform in which the time during which the flyback voltage between head terminals becomes lower than a slicing level becomes longer than that obatined when no head opening abnormality occurs is obtained. A sense circuit detects the voltage waveform and the input transistor Q51 of a buffer circuit 22 is turned on by, for example, making an electric current to flow to the transistor Q51 from an output terminal IUX, Consequently, the output of the circuit 22 becomes 'L' and the differential transistor Q62 of a timer circuit 23 is turned off, and then, a capacity is charged by means of a collector-side transistor Qp62 and the potential at a node N11 rises. When such a state becomes longer than a preset pariod of time, the potential at the node N11 becomes higher than the reference voltage VR3 of a level discriminated circuit 25 and the output of the circuit 24 is inverted to αHβ from αLβ. The output VOPN which latches 25 the output of the circuit 24 changes to αHβ and the head abnormality detecting signal of a logical gate circuit changes. Therefore, the head opening abnormality can be detected surely.

4. 发明专利

JPS61194854A SEMICONDUCTOR DEVICE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPS61194854A
公开(公告)日：1986-08-29
申请号：JP3436885
申请日：1985-02-25
申请人： AKITA DENSHI KK , HITACHI LTD
发明人： MORIYA ATSUSHI
IPC分类号： H01L23/04 , H01L23/02 , H01L23/10
摘要： PURPOSE:To avoid short circuit between leads or between electrodes caused by free movement of fine foreign substances by a method wherein an internal surface of a cavity of a package is coated with a material substantially same as a sealing material when a pellet is airtightly sealed. CONSTITUTION:An internal bottom surface 11a of a cap 11 is coated with low melting point glass 12 which is the same material as a sealing material by a method such as coating. The cap 11 and a substrate 2 are put into a sealing furnace while being placed on a jig. At that time, fine foreign substances 13 adhering to the surface of the pellet fall onto the glass 12 applied on the bottom surface 11a. After heating, the substrate 2 and the cap 11 are taken out of the sealing furnace and cooled. The melted glass 12 is solidified and the airtight sealing of the inside of the package is achieved. With this constitution, short circuit between leads 6 or between electrodes caused by free movement of the foreign substances 13 is avoided.

5. 发明专利

JPS61128379A Integration circuit 失效
标题翻译：集成电路
公开(公告)号：JPS61128379A
公开(公告)日：1986-06-16
申请号：JP24961584
申请日：1984-11-28
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： MORIYA ATSUSHI , MAIO KENJI
IPC分类号： G06G7/186
摘要： PURPOSE: To compensate offset voltage or drift by connecting a device for holding the reverse voltage of the offset voltage to one input terminal of an integrating amplifier and setting up said device by using a part of the discharge period of an integrating capacitor.
CONSTITUTION: At the discharge of the integrating capacitor 2, an input offset voltage e
of is outputted to an output eθ and the e
of is held in a holding capacitor 10 in the arrow direction. When switches 7, 8 are opened and a switch 9 is closed, the capacitor 10 is connected to the non-inversional input of the integrat ing amplifier 3. However, the holding voltage of the capacitor 10 is the reverse polarity against the e
of , so that the offset voltages of the inversional and non- inversional input terminals of the amplifier 3 are equally compensated to zero and the output eθ is set up precisely to 0V through a switch 4. Then, a switch 6 is opened, and during the application of an input pulse, integration is executed, an offset error at the start of integration, an integrating error at the time of integration and a droop error at the holding of voltage can be removed.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过连接用于保持偏移电压的反向电压的器件与积分放大器的一个输入端子并通过使用积分电容器的放电周期的一部分来设置所述器件来补偿失调电压或漂移。构成：在积分电容器2的放电时，将输入偏移电压eof输出到输出etheta，eof沿箭头方向保持在保持电容器10中。当开关7,8断开并且开关9闭合时，电容器10连接到积分放大器3的非反相输入端。然而，电容器10的保持电压与eof相反极性，因此放大器3的反相和非反相输入端的偏移电压被均等地补偿为零，并且通过开关4将输出etheta精确地设置为0V。然后，开关6断开，并且在应用输入脉冲，积分，积分开始时的偏移误差，积分时的积分误差以及保持电压时的下垂误差。

6. 发明专利

JPS6177431A Analog digital converter for x-ray ct equipment 失效
标题翻译： X射线CT设备的模拟数字转换器
公开(公告)号：JPS6177431A
公开(公告)日：1986-04-21
申请号：JP19853784
申请日：1984-09-25
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： HAYASHI SHINICHI , MAIO KENJI , MORIYA ATSUSHI
IPC分类号： H03M1/56 , A61B6/03 , G01T1/17 , H03M1/58
摘要： PURPOSE: To decrease the number of effective bits of a digital output by comparing a polygonal ramp voltage with an input voltage and shifting down the content of count based on the weight of a constant electric current source at each switching of the polygonal line voltage for count.
CONSTITUTION: A polygonal ramp voltage having a gradient in response to constant current source is generated from an integration device comprised of the constant current source i
0 , 4i
0 , 16i
0 limited with a prescribed accuracy, a switch group switching sequentially them, an operational amplifier OP and a capacitor C. The ramp voltage and input voltages V
1 ∼V
n are compared with each other by comparators C
1 ∼C
n . A counter K counts a clock CLK to generate a digital value corresponding to the ramp voltage, and when the input voltages V
1 ∼V
n are coincident with the ramp voltage at the comparators C
1 ∼C
n , the content of the counter K is set to registers R
1 ∼R
n . In switching the polygonal line voltage, the content of the counter K is shifted down by using a shift signal SFT based on the weight of the constant current source, inputted to the registers R
1 ∼R
n to decrease the total number of bits.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过将多边形斜坡电压与输入电压进行比较来减少数字输出的有效位数，并在每次切换多边形线电压时，根据恒定电流源的重量将计数的内容向下移动。构成：从由恒定电流源i0,4I0,16i0组成的积分装置产生一个响应于恒定电流源具有梯度的多边形斜坡电压，其以规定的精度限制，开关组依次切换它们，运算放大器OP和电容器C.斜坡电压和输入电压V1-Vn通过比较器C1-Cn相互比较。计数器K计数时钟CLK以产生对应于斜坡电压的数字值，并且当输入电压V1-Vn与比较器C1-Cn处的斜坡电压一致时，计数器K的内容被设置为寄存器R1 -Rn。在切换折线电压时，通过使用基于恒定电流源的权重的移位信号SFT将计数器K的内容向下移位，输入到寄存器R1-Rn以减少总位数。

7. 发明专利

JPS60112326A ANALOG/DIGITAL CONVERTER 失效
公开(公告)号：JPS60112326A
公开(公告)日：1985-06-18
申请号：JP21946283
申请日：1983-11-24
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： HAYASHI SHINICHI , MAIO KENJI , MORIYA ATSUSHI
IPC分类号： H03M1/56 , H03M1/12
摘要： PURPOSE:To attain effectively the desired accuracy for a current source of a lamp voltage generator by comparing the input voltage with the lamp voltage given from the generator for broken line-shaped lamp voltage which contains switch groups and an integrator and extracting the digital output corresponding to each input voltage with the accuracy necessary for each register. CONSTITUTION:A switch S0 is opened at a time point t0 and a switch S1 is closed for a section of t1. The lamp voltage (y) rises up with a slope proportional to the courrent value I1 by an integration circuit (OP and C). A counter K1 starts counting with a clock CLK and produces the digital value corresponding to the lamp voltage value. the contents of a counter K are set to register groups L1-Ln when coincidence is obtained between the input voltages V1-Vn and the lamp voltage respectively. The switch S1 is opened at a time point (t0+t1) and the switch S2 is closed for a section of t2. The voltage (y) rises up in proportion to the value I2, and the counter K1 is shifted down by a shift signal SFT by an amount equivalent to the difference of weight between current values I1 and I2.

8. 发明专利

JPS59147534A Control system of analog multiplexer 失效
标题翻译：模拟多路复用器控制系统
公开(公告)号：JPS59147534A
公开(公告)日：1984-08-23
申请号：JP1981483
申请日：1983-02-10
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： MAIO KENJI , MORIYA ATSUSHI
IPC分类号： H03K17/00 , H03K17/62
CPC分类号： H03K17/62
摘要： PURPOSE:To decrease the switching time by controlling the system so that one channel signal is outputted from a nonselected multiplexer when many analog signals are changed over and read out successively by many analog multiplexers and the switches at the poststage. CONSTITUTION:When an analog multiplexer MPX61 is in use, only a selecting signal 41 is at ''1'' and others are at ''0''. Thus, the switch selecting signals A-D of the MPX61 are at the same level as a signal 3 by the operation of a gate circuit 7 but other selecting signals are at ''0'' and the switch of the 1st channel is selected. Since switches 22-24 of the next and succeeding stages are opened, only an output of the 1st block appears on an output line 71. Since the 1st channel of the nonselected MPXes is selected in this way, the signal potential of the 1st channel of each block is charged in output parasitic capacitance, the charge/ discharge current at switching does not almost exist and high-speed switching is attained.
摘要翻译：目的：通过控制系统来减少切换时间，以便当许多模拟信号由许多模拟多路复用器和后台的开关连续读出时，从非选择的多路复用器输出一个通道信号。构成：当使用模拟多路复用器MPX61时，只有选择信号41处于“1”，而其他处于“0”。因此，通过门电路7的操作，MPX61的开关选择信号A-D处于与信号3相同的电平，但是其他选择信号为“0”，并且选择第一通道的开关。由于下一级和后级的开关22-24打开，所以在输出线71上仅出现第一块的输出。由于以这种方式选择了非选择的MPX的第一通道，所以第一通道的信号电位每个块在输出寄生电容中充电，开关中的充电/放电电流几乎不存在，并且实现了高速切换。

9. 发明专利

JPS61137541A Data detection circuit of x-ray ct apparatus 失效
标题翻译： X射线CT装置的数据检测电路
公开(公告)号：JPS61137541A
公开(公告)日：1986-06-25
申请号：JP25918584
申请日：1984-12-10
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： MORIYA ATSUSHI , MAIO KENJI
IPC分类号： G01T1/17 , A61B6/03 , G01N23/04 , H03K5/08

10. 发明专利

JPS6176136A Data detection circuit of ct apparatus 失效
标题翻译： CT装置的数据检测电路
公开(公告)号：JPS6176136A
公开(公告)日：1986-04-18
申请号：JP19854384
申请日：1984-09-25
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： MORIYA ATSUSHI , MAIO KENJI
IPC分类号： G01T1/17 , A61B6/03 , H03G3/12

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