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1. 发明专利

JPH0772943A CONSTANT VOLTAGE CIRCUIT 失效
公开(公告)号：JPH0772943A
公开(公告)日：1995-03-17
申请号：JP22023593
申请日：1993-09-03
申请人： TOSHIBA CORP , TOSHIBA MICRO ELECTRONICS
发明人： KURODA TADASHI , KAJIWARA EIJI , TAGUCHI TAKASHI , YOSHIDA HIROSHI , UCHIDA HIDEAKI
IPC分类号： G05F1/56 , G05F3/24 , G11C11/407 , H03G3/10
摘要： PURPOSE:To provide a constant voltage circuit capable of obtaining constant voltage by suppressing the influence of the fluctuation of power supply voltage without causing the enlargement of a circuit scale. CONSTITUTION:This circuit is provided with a bias circuit 1 generating bias voltage Bias 1 and Bias 2 by receiving power supply voltage, a reference voltage generation circuit 2 generating reference voltage Vref by receiving power source voltage and bias voltage 2, and a voltage follower circuit which is provided with a differential amplifying stage 3 and output stages P6, R3, R4 and C1 to output the n-fold voltage of reference voltage Vref by receiving the bias voltage Bias 1 and reference voltage Vref and where reference voltage is inputted to one of the input terminal of the stage 3 and the 1/n voltage of voltage outputted from the voltage follower circuit is inputted to the other input terminal. Thus, voltage outputted from the voltage follower circuit is given to the reference voltage circuit 2 as the power supply voltage.

2. 发明专利

JPH06152390A SEMICONDUCTOR INTEGRATED CIRCUIT 失效
公开(公告)号：JPH06152390A
公开(公告)日：1994-05-31
申请号：JP30212292
申请日：1992-11-12
申请人： TOSHIBA CORP , TOSHIBA MICRO ELECTRONICS
发明人： NIO RYOICHI , KURODA TADASHI
IPC分类号： H03B5/06 , H03B5/32 , H03L3/00
摘要： PURPOSE:To make it possible to oscillate also a crystal oscillation circuit whose oscillation start voltage becomes higher than battery voltage due to manufacturing dispersion and to improve the yield of the circuit by providing a semiconductor integrated circuit with a boosting circuit and an oscillation circuit. CONSTITUTION:When the generation of a clock pulse is started in a frequency dividing circuit 13, an oscillation detecting circuit 16 detects the pulse generation and supplies a detection signal to a timer circuit 17. The circuit 17 counts up time necessary for stabilizing the output voltage V2 of the boosting circuit 15 and inverts the logical level of a timer signal from 'H' to 'L'. A power supply switching circuit 11 switches boosting voltage V2 to battery voltage V1 and outputs the voltage V1 to the crystal oscillation circuit 10. The oscillation starting voltage Vsta of the circuit 10 is 1.2V e.g. and the oscillation maintaining voltage of the circuit 10 having about 1.2V Vsta is about 1.0V, so that even when voltage supplied from the circuit 11 is dropped to about 1.5V corresponding to the V1, the circuit 10 can continuously oscillate.

3. 发明专利

JPH0677780A SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE 失效
公开(公告)号：JPH0677780A
公开(公告)日：1994-03-18
申请号：JP23048692
申请日：1992-08-28
申请人： TOSHIBA CORP , TOSHIBA MICRO ELECTRONICS
发明人： KURODA TADASHI , YOSHIDA HIROSHI , UDAGAWA OSAMU
IPC分类号： G06F15/02 , H03K3/02
摘要： PURPOSE:To reduce the power consumption by setting a frequency of a basic clock lower than an operation maximum frequency of a CPU when a drive power supply voltage is a prescribed voltage or below so as to decrease a minimum voltage for the CPU. CONSTITUTION:When a power supply voltage reaches a prescribed voltage or below, an output S6 of a voltage detection circuit 8 goes to an H level. Thus, a signal S5 resulting from an output S3 of an OR circuit 4 subject to frequency division by two stages at binary counters 61, 62 is outputted from an OR circuit 9d as a signal S7 that is the same as the signal S5 to a basic clock generating circuit 10, from which basic clocks phi1, phi2 are generated. A CPU 16 is operative even when the power supply voltage is lower than a prescribed voltage by setting the frequency of the output clocks phi1, phi2 to be lower than a maximum frequency of the CPU 16. That is, the minimum operating voltage of the CPU 16 is set lower. This is attained through the adjustment of number of stages of the counters 61, 62. Thus, the power consumption is reduced.

4. 发明专利

JPH06174759A VOLTAGE DETECTING CIRCUIT DEVICE 失效
公开(公告)号：JPH06174759A
公开(公告)日：1994-06-24
申请号：JP32658792
申请日：1992-12-07
申请人： TOSHIBA CORP , TOSHIBA MICRO ELECTRONICS
发明人： KURODA TADASHI , FUKUMOTO KOJI , UDAGAWA OSAMU , SUGIYAMA MARIKO
IPC分类号： G01R19/00 , G01R19/165
摘要： PURPOSE:To allow the stabilized positive detection of power supply voltage under instable state at the time of starting power supply while suppressing current consumption during steady state. CONSTITUTION:A voltage detecting circuit device receiving a voltage signal corresponding to a reference voltage at one input of a differential amplifier 3, a voltage signal corresponding to DC power supply voltage at the other input of the differential amplifier 3 and producing a voltage detection signal from the output terminal of the differential amplifier 3 comprises a constant voltage circuit 27 receiving output voltage from the DC power supply and producing a voltage signal having lower level than the voltage signal corresponding to the reference voltage within a range where output voltage of the DC power supply does not exceed the reference voltage whereas producing a constant voltage signal having substantially same level as the voltage signal corresponding to the reference voltage in the range where output voltage of the DC power supply exceeds the reference voltage. Output signal from the constant voltage circuit 27 is fed, as a voltage signal corresponding to the output signal of the DC power supply, to the differential amplifier 3.

5. 发明专利

JP2002132230A LIQUID CRYSTAL DRIVING CIRCUIT 失效
公开(公告)号：JP2002132230A
公开(公告)日：2002-05-09
申请号：JP2000329229
申请日：2000-10-27
申请人： TOSHIBA CORP
发明人： KURODA TADASHI , NANZAKI HIRONORI , SAITO TETSUYA
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal driving circuit capable of stably driving each signal line so that the picture quality is not deteriorated even if a load capacity of the signal line fluctuates. SOLUTION: The liquid crystal driving circuit comprises a shift register 2, a data latch circuit 3, a load latch circuit 4, a resistance type potential divider circuit 5 for generating plural analog reference voltages, buffer amplifiers 6 for buffering the analog reference voltages, an output selecting circuit 7 for selecting one of the outputs of the buffer amplifiers 6 according to the logic of the digital picture data latched by the load latch circuit 4, and two kinds of bias circuits 8a, 8b capable of supplying bias quantities different from each other. The driving capacities of each buffer amplifier 6 are controlled to be variable according to the load capacities of the buffer amplifiers 6 arranged correspondingly to each of the analog reference voltages, therefore, the operations of the buffer amplifiers 6 can be stabilized even if they have uneven load capacities.

6. 发明专利

JPS61103224A Voltage control circuit 失效
标题翻译：电压控制电路
公开(公告)号：JPS61103224A
公开(公告)日：1986-05-21
申请号：JP22486284
申请日：1984-10-25
申请人： Toshiba Corp
发明人： KURODA TADASHI , TAKAHASHI TSUTOMU
IPC分类号： H02J1/00 , G05F1/67
CPC分类号： G05F1/67 , Y02E10/58
摘要： PURPOSE:To incorporate parts as much as possible within an LSI ship to attain the miniaturization and cost reduction of a device, by combining two diodes provided in the LSI ship to obtain the characteristics equal to an external LED. CONSTITUTION:When the output voltage VS of a solar battery 2 is smaller than the forward conduction start voltage VF1 of a diode 6, the voltage V2 supplied to an LSI1 is defined as V2 VS since the input impedance of the LSI1 is extremely high. Then the forward current I3 flows to the diode 6 when the VS exceeds the VF. while the forward current I4 flows when the VS exceeds the voltage VF2 higher than the VF1 since a resistance 8 is connected in series to a diode 7. Therefore the output current I5 of the battery 2 is defined as I5=I3+I4. The characteristics of the I5 are about equal to a characteristic curve of a conventional external LED. That is, a sudden rise of about 1-100muA is shown with the voltage of about 1.5V. Thus it is possible to keep the voltage V2 at the optimum level of about 1.5V.
摘要翻译：目的：通过组合LSI船舶中提供的两个二极管以获得与外部LED相同的特性，在LSI船舶中尽可能多地部件以实现设备的小型化和降低成本。构成：当太阳能电池2的输出电压VS小于二极管6的正向导通开始电压VF1时，供给LSI1的电压V2由于LSI1的输入阻抗极高而被定义为V2V。然后，当VS超过VF时，正向电流I3流到二极管6。而由于电阻8串联连接到二极管7，当VS超过VF1的电压VF2时，正向电流I4流动。因此，电池2的输出电流I5被定义为I5 = I3 + I4。 I5的特性大约等于常规外部LED的特性曲线。也就是说，以大约1.5V的电压示出了大约1-100muA的突然上升。因此，可以将电压V2保持在约1.5V的最佳电平。

7. 发明专利

JPH07273542A INTEGRATED CIRCUIT 失效
公开(公告)号：JPH07273542A
公开(公告)日：1995-10-20
申请号：JP6144694
申请日：1994-03-30
申请人： TOSHIBA CORP
发明人： NAGAI MANABU , KURODA TADASHI
IPC分类号： H03B5/02
摘要： PURPOSE:To provide the integrated circuit capable of activating an amplifier circuit at an operating point even when an oscillation circuit is used at a high speed and under a low voltage. CONSTITUTION:This integrated circuit is provided with an oscillation circuit 110 and an amplifier circuit 140 amplifying an output signal of the oscillation circuit 110 and providing an amplified signal, and also with a DC component eliminating circuit 120 to eliminate a DC component of the output signal outputted from the oscillation circuit 110 and a DC component addition circuit 130 adding a DC component in response to an operating point of the amplifier circuit 140 to the output signal whose DC component is eliminated by the DC component elimination circuit 120 and giving the result to the amplifier circuit 140. Since it is not required to decide a channel length and a channel width of MOS transistors(TRs) being components of the amplifier circuit 140 depending on the operating point of the oscillation circuit 110, it is easily operated the amplifier circuit 140 at its operating point when the oscillation circuit 110 is used at a high speed and under a low voltage.

8. 发明专利

JPS62155737A BATTERY SOURCE CHANGE-OVER CIRCUIT 失效
公开(公告)号：JPS62155737A
公开(公告)日：1987-07-10
申请号：JP29404985
申请日：1985-12-27
申请人： TOSHIBA CORP
发明人： KURODA TADASHI
IPC分类号： G05F1/46 , H02J7/00 , H02J9/06 , H03K17/22 , H03K17/24 , H03K17/687

9. 发明专利

JPH07261142A LCD DRIVE CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE 失效
公开(公告)号：JPH07261142A
公开(公告)日：1995-10-13
申请号：JP5623394
申请日：1994-03-25
申请人： TOSHIBA CORP
发明人： KAJIWARA EIJI , KOBAYASHI TOSHIAKI , KURODA TADASHI
IPC分类号： G02F1/133
摘要： PURPOSE:To strengthen the surge breakdown strength of a protecting MOS transistor in a liquid crystal drive circuit. CONSTITUTION:The device is provided with a power source VDD for a logic circuit, an LCD driving power source VLCD, an LCD driver circuit 8 provided with a buffer circuit supplied with the power source VLCD for driving an LCD and a protection MOS circuit supplied with the power source VDD, a comparison circuit 40 comparing the power source VDD with the power source VLCD, and a power source switch circuit 42 in which larger one between the power source VDD and the power source VLCD is selected according to the comparison result, and is imparted to the backgate of the MOS transistor constituting the buffer circuit of the LCD driver circuit 8 and to the backgate and gate of the MOS circuit constituting the protection MOS circuit, and when a + surge is applied from the output side of the LCD driver circuit 8, a parasitic transistor and a parasitic diode are generated on the MOS transistor constituting the protection MOS circuit, and by making them an ON state and flow a current, a surge current is made flow through the power source VDD, and the transistors in the circuit are protected.

10. 发明专利

JPH07202663A AUTO CLEAR CIRCUIT 失效
公开(公告)号：JPH07202663A
公开(公告)日：1995-08-04
申请号：JP33546893
申请日：1993-12-28
申请人： TOSHIBA CORP
发明人： NAGAI MANABU , KOBAYASHI TOSHIAKI , KURODA TADASHI
IPC分类号： H03K5/04 , H03K17/22
摘要： PURPOSE:To lengthen the pulse width of an auto clear signal by constituting first and second voltage control circuits by alternately performing a serial connection of the circuits. CONSTITUTION:The gate of the nMOS transistor Tr 111 of a first voltage control circuit 110 is connected with a power source line 140 via the pM0S transistor Tr 121 of a second voltage control circuit 120 and the drain of the Tr 121 is connected with a capacitor 122. Therefore, by increasing the resistance between the gate of the Tr 111 and the line 140 and making the part of the current from the line 140 flow into a the capacitor 122, current to be supplied to the gate of the Tr 111 is reduced. As a result, because the gate voltage Vg of the Tr 111 gently rises, the time from the supplying of power supply to the turning on of the Tr 111 becomes long by the time. Therefore, an auto clear signal whose pulse width is long can be generated.

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