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    • 16. 发明专利
    • VERTICAL DEFLECTION CIRCUIT
    • JPH11112827A
    • 1999-04-23
    • JP27544497
    • 1997-10-08
    • TOSHIBA AVE KKTOSHIBA CORP
    • OKAMURA TAKASHIKANBARA NAGAHIKOKINOSHITA HITOSHI
    • H04N3/16
    • PROBLEM TO BE SOLVED: To eliminate the need of applying a DC voltage from the outside to a vertical deflection coil for screen adjustment. SOLUTION: An input sawtooth-shaped wave voltage is supplied through a resistor R1 to a vertical deflection output circuit 3. During a scanning period, a first switch SW1 selects the ground and the driving voltage of Vcc is supplied to the output terminal (B point) of the vertical deflection output circuit 3, that is one end of a vertical deflection yoke coil DY. Also, a second switch SW2 supplies a voltage (Vcc/2) to a middle point amplifier and the voltage is supplied through the resistor R3 to the other end of the vertical deflection yoke coil DY. During a fly-back period, the first switch SW1 selects a voltage source Vcc and the drive voltage of 2Vcc is supplied to the output terminal (B point) of the vertical deflection output circuit 3, that is one end of the vertical deflection yoke coil DY. Also, the second switch SW2 supplies a ground potential to the middle point amplifier and the voltage is supplied through the resistor R3 to the other end of the vertical deflection yoke coil DY.
    • 18. 发明专利
    • Semiconductor integrated circuit
    • 半导体集成电路
    • JP2009170589A
    • 2009-07-30
    • JP2008005686
    • 2008-01-15
    • Toshiba CorpToshiba Microelectronics Corp東芝マイクロエレクトロニクス株式会社株式会社東芝
    • OKAMURA TAKASHI
    • H01L21/822H01L27/04H03K19/003
    • PROBLEM TO BE SOLVED: To suppress operation trouble of a switching element and a circuit due to a leakage current flowing to a semiconductor substrate side.
      SOLUTION: This semiconductor integrated circuit 50 is provided with: a reference power source 1; a leakage current canceling circuit 2; an amplifier circuit 3; an NPN transistor NT1; a resistor R1; a resistor R2; an external terminal Pad1; and an external terminal Pad2. The NPN transistor NT1 and the resistor R2 are electrostatic protection elements. The leakage current canceling circuit 2 is provided with PNP transistors PT1-3, an NPN transistor NT2, an NPN transistor NT3, and a resistor R3. The NPN transistor NT3 and the resistor R3 are replica electrostatic protection elements. The PNP transistors PT1-3 and the NPN transistor NT2 function as a current supply circuit part, supply a leakage current flowing to the replica electrostatic protection element in high-temperature operation to the NPN transistor Nt1 side as a turned current, and suppresses voltage drop on the collector side by a leakage current of the electrostatic protection element.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 解决的问题:为了抑制由于流向半导体基板侧的漏电流而导致的开关元件和电路的操作故障。 解决方案:该半导体集成电路50设置有参考电源1; 泄漏电流消除电路2; 放大电路3; NPN晶体管NT1; 电阻R1; 电阻R2; 外部端子Pad1; 和外部端子Pad2。 NPN晶体管NT1和电阻R2是静电保护元件。 泄漏电流消除电路2设置有PNP晶体管PT1-3,NPN晶体管NT2,NPN晶体管NT3和电阻器R3。 NPN晶体管NT3和电阻R3是复制静电保护元件。 PNP晶体管PT1-3和NPN晶体管NT2用作电流供应电路部分,在NPN晶体管Nt1侧以高温运行的方式将流向复制静电保护元件的漏电流作为转向电流,抑制电压降 在集电极侧通过静电保护元件的漏电流。 版权所有(C)2009,JPO&INPIT
    • 19. 发明专利
    • CURRENT SWITCHING CIRCUIT
    • JPS62168422A
    • 1987-07-24
    • JP967286
    • 1986-01-20
    • TOSHIBA CORPTOSHIBA AUDIO VIDEO ENG
    • NAGATA MITSURUOKAMURA TAKASHI
    • H03K17/62
    • PURPOSE:To obtain a current switching circuit having high ratio accuracy which is used for a dual slope D/A converter, etc., by supplying a voltage corre sponding to a difference of base and emitter voltages between transistor differen tial switches, as a switching voltage. CONSTITUTION:A collector voltage difference of transistors QA, QB which is used as a current source of a switch part is equal to a difference of base and emitter voltages of transistors Q1, Q2 and Q3, Q4, when an emitter area ratio of the transistors Q1, Q2 and Q3, Q4, and an emitter area ratio of the current source transistors QA, QB are set as (m):1 and (n):1, respectively, VTln(n/m) is obtained. On the other hand, when an emitter area ratio K:1 or a transistor QC and QD of a control part, and a ratio of the current source P:1 are selected as K/P=n/m, collector voltages of the current source transistor QA and QB, and the base width modulation effects operates equally on the transistors QA, QB and a current ratio is held exactly, therefore,this circuit is suitable for a circuit which requires high ratio accuracy.