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    • 1. 发明申请
    • LEVEL CONVERSION CIRCUIT
    • 电平转换电路
    • US20090033402A1
    • 2009-02-05
    • US12181729
    • 2008-07-29
    • Shinji YamamotoToshihiko TakedaTaketo Kunihisa
    • Shinji YamamotoToshihiko TakedaTaketo Kunihisa
    • H03L5/00
    • H03K19/0013H03K19/018507
    • A level conversion circuit according to the present invention comprises: a first transistor having a gate thereof grounded, for inputting the input voltage to a source thereof and outputting an output voltage from a drain thereof; a second transistor having a drain thereof to which a power supply voltage is applied, for inputting the output voltage outputted from the drain of the first transistor to a gate thereof and outputting, from a source thereof, the output voltage determined by the power supply voltage; a level shift circuit for inputting the output voltage outputted from the source of the second transistor to an input end thereof and outputting, from an output end thereof, a voltage whose level is shifted by a predetermined amount; and a resistance inserted between the output end of the level shift circuit and a ground. Thus, it becomes possible to reduce a current Ii flowing to the gate of the first transistor to a level close to zero.
    • 根据本发明的电平转换电路包括:第一晶体管,其栅极接地,用于将输入电压输入到其源极,并从其漏极输出输出电压; 第二晶体管,其漏极施加有电源电压,用于将从第一晶体管的漏极输出的输出电压输入到其栅极,并从其源极输出由电源电压确定的输出电压 ; 电平移位电路,用于将从第二晶体管的源极输出的输出电压输入到其输入端,并从其输出端输出电平偏移预定量的电压; 以及插入在电平移位电路的输出端和地之间的电阻。 因此,可以将流过第一晶体管的栅极的电流I i减小到接近零的水平。
    • 2. 发明授权
    • Level conversion circuit with low consumption current characteristics
    • 电平转换电路具有低功耗电流特性
    • US07692470B2
    • 2010-04-06
    • US12181729
    • 2008-07-29
    • Shinji YamamotoToshihiko TakedaTaketo Kunihisa
    • Shinji YamamotoToshihiko TakedaTaketo Kunihisa
    • H03L5/00
    • H03K19/0013H03K19/018507
    • A level conversion circuit according to the present invention comprises: a first transistor having a gate thereof grounded, for inputting the input voltage to a source thereof and outputting an output voltage from a drain thereof; a second transistor having a drain thereof to which a power supply voltage is applied, for inputting the output voltage outputted from the drain of the first transistor to a gate thereof and outputting, from a source thereof, the output voltage determined by the power supply voltage; a level shift circuit for inputting the output voltage outputted from the source of the second transistor to an input end thereof and outputting, from an output end thereof, a voltage whose level is shifted by a predetermined amount; and a resistance inserted between the output end of the level shift circuit and a ground. Thus, it becomes possible to reduce a current Ii flowing to the gate of the first transistor to a level close to zero.
    • 根据本发明的电平转换电路包括:第一晶体管,其栅极接地,用于将输入电压输入到其源极,并从其漏极输出输出电压; 第二晶体管,其漏极施加有电源电压,用于将从第一晶体管的漏极输出的输出电压输入到其栅极,并从其源极输出由电源电压确定的输出电压 ; 电平移位电路,用于将从第二晶体管的源极输出的输出电压输入到其输入端,并从其输出端输出电平偏移预定量的电压; 以及插入在电平移位电路的输出端和地之间的电阻。 因此,可以将流过第一晶体管的栅极的电流I i减小到接近零的水平。
    • 3. 发明授权
    • High-frequency power amplifier
    • 高频功率放大器
    • US5982236A
    • 1999-11-09
    • US009241
    • 1998-01-20
    • Osamu IshikawaTakahiro YokoyamaTaketo KunihisaJunji ItoMasaaki NishijimaShinji Yamamoto
    • Osamu IshikawaTakahiro YokoyamaTaketo KunihisaJunji ItoMasaaki NishijimaShinji Yamamoto
    • H03F1/02H03F3/60H03F3/191H03F3/68
    • H03F3/601H03F1/0261
    • A high-frequency power amplifier comprises a transistor for high-frequency power which operates and whose current-voltage characteristics greatly change when positive voltage is supplied on its input terminal, an input bias circuit, an output bias circuit, an input impedance matching circuit, an output impedance matching circuit, and a positive voltage generation circuit. The positive voltage generation circuit comprises a detection circuit which detects part of the high-frequency power which is entered to or outputted from the transistor for high-frequency power, a rectification circuit which rectifies the part of the high-frequency power outputted from the detection circuit and outputs pulsating positive voltage, and a smoothing circuit which smoothes the pulsating positive voltage outputted from the rectification circuit and outputs positive voltage. The positive voltage generation circuit outputs positive voltage which increases or decreases in accordance with an increase or decrease in the detected part of the high-frequency power to the input terminal of the input bias circuit, without intervention of a direct-current power supply.
    • 高频功率放大器包括用于高频功率的晶体管,其工作时的电流电压特性在其输入端子上提供正电压,输入偏置电路,输出偏置电路,输入阻抗匹配电路, 输出阻抗匹配电路和正电压发生电路。 正电压发生电路包括:检测电路,其检测输入到高频电源的晶体管或从高频电源的晶体管输出的高频电力的一部分;整流电路,其对检测出的部分高频电力进行整流; 电路和输出脉动正电压,以及平滑电路,其使从整流电路输出的脉动正电压平滑并输出正电压。 正电压发生电路根据高频电源的检测部分对输入偏置电路的输入端子的增加或减少而输出正电压,而不需要直流电源的干预。
    • 10. 发明授权
    • Vibration actuator and method for manufacturing the same
    • 振动致动器及其制造方法
    • US08633632B2
    • 2014-01-21
    • US13052989
    • 2011-03-21
    • Yuki OdaShinji YamamotoAkio Atsuta
    • Yuki OdaShinji YamamotoAkio Atsuta
    • H02N11/00
    • H01L41/35H02N1/008H02N2/001H02N2/005H02N2/0055H02N2/006H02N2/0065H02N2/12H02N2/16H02N2/163H02N2/22Y10T29/42Y10T29/49
    • A vibration actuator includes an elastic body on which at least one projection is formed and a vibrating body including an electromechanical conversion device, and drives a driven member that is in contact with a contact portion of the projection by causing an end portion of the projection to perform an ellipsoidal movement in response to a combination of two vibration modes generated in the vibrating body when an alternating driving voltage is applied. The elastic body is formed integrally with the projection and a bonding portion between the projection and the electromechanical conversion device. A space is provided between the contact portion and the electromechanical conversion device to which the projection is bonded. The spring portion is provided between the bonding portion and the contact portion and causes the projection to exhibit a spring characteristic when the contact portion is pressed by the driven member.
    • 振动致动器包括:弹性体,其上形成有至少一个突起;以及振动体,其包括机电转换装置,并且通过使突起的端部通过突出部的端部驱动与突起的接触部分接触的从动构件 当施加交替的驱动电压时,响应于在振动体中产生的两种振动模式的组合来执行椭圆运动。 弹性体与突起一体地形成,并且在突起和机电转换装置之间形成接合部。 在接触部和与该凸起接合的机电转换装置之间设置有空间。 弹性部分设置在接合部分和接触部分之间,并且当接触部分被被驱动部件按压时,使突起呈现出弹簧特性。