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    • 32. 发明授权
    • Output circuit
    • 输出电路
    • US07764113B2
    • 2010-07-27
    • US12169462
    • 2008-07-08
    • Takashi RyuTakuya IshiiNaoyuki NakamuraHirohisa Tanabe
    • Takashi RyuTakuya IshiiNaoyuki NakamuraHirohisa Tanabe
    • G05F1/10G05F3/02
    • H03F1/0211H03F2200/504
    • A reference voltage is applied from a reference voltage generating circuit to the non-inverting input terminal of an amplifier for supplying a drive voltage to the gate terminal of an NMOS transistor, and the output voltage appearing at the source terminal of the NMOS transistor is divided by a resistor pair and applied to the inverting input terminal of the amplifier. The voltage obtained by adding a voltage equal to or higher than the voltage for sufficiently driving the NMOS transistor to the output voltage appearing at the source terminal of the NMOS transistor is generated by a charge pump circuit and supplied to the amplifier as a power supply voltage. With this configuration, the drive voltage for the NMOS transistor is suppressed to the required minimum voltage while the drive voltage is obtained securely. The power consumption in the amplifier can thus be suppressed.
    • 参考电压从参考电压产生电路施加到放大器的非反相输入端,用于向NMOS晶体管的栅极端提供驱动电压,并且将在NMOS晶体管的源极端出现的输出电压分压 通过电阻对并施加到放大器的反相输入端。 通过加上等于或高于用于充分驱动NMOS晶体管的电压至出现在NMOS晶体管的源极端子处的输出电压的电压而获得的电压由电荷泵电路产生并作为电源电压提供给放大器 。 利用这种配置,可靠地获得驱动电压,将NMOS晶体管的驱动电压抑制到所需的最小电压。 因此可以抑制放大器的功耗。
    • 37. 发明授权
    • DC-DC converter
    • DC-DC转换器
    • US07285944B2
    • 2007-10-23
    • US11523699
    • 2006-09-20
    • Takuya IshiiTakashi RyuHirohisa TanabeMasaaki Koto
    • Takuya IshiiTakashi RyuHirohisa TanabeMasaaki Koto
    • G05F1/40
    • H02M3/156
    • A DC-DC converter for converting an input DC voltage to an output DC voltage has a switch element which is turned ON/OFF by a drive signal, a reference voltage source for outputting a first reference voltage when the switch element is ON or outputting a second reference voltage when the switch element is OFF, a capacitive element having one terminal connected to the reference voltage source, a charge/discharge circuit for discharging the capacitive element when the switch element is ON and charging the capacitive element when the switch element is OFF, a switch circuit for short-circuiting the capacitive element when the switch element is turned ON and OFF, and a comparison circuit for comparing the output DC voltage or a voltage at which the output DC voltage is detected with a voltage at the other terminal of the capacitive element and generating the drive signal.
    • 用于将输入DC电压转换为输出DC电压的DC-DC转换器具有通过驱动信号导通/截止的开关元件,用于当开关元件为ON时输出第一基准电压的基准电压源,或者输出 当开关元件断开时的第二参考电压,具有连接到参考电压源的一个端子的电容元件,当开关元件接通时对电容元件进行放电的充电/放电电路,并且当开关元件断开时对电容元件充电 开关电路,用于在开关元件接通和断开时短路电容元件;以及比较电路,用于将输出直流电压或检测到输出直流电压的电压与另一端的电压 电容元件并产生驱动信号。