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    • 8. 发明申请
    • CMOS amplifier
    • CMOS放大器
    • US20070096819A1
    • 2007-05-03
    • US11541650
    • 2006-10-03
    • Makoto YamamotoKeiichi Fujii
    • Makoto YamamotoKeiichi Fujii
    • H03F3/45
    • H03F3/303H03F3/45475H03F3/72H03F2200/18H03F2200/27H03F2200/507H03F2203/30015H03F2203/30061H03F2203/45138H03F2203/7203H03F2203/7206H03F2203/7227
    • A CMOS amplifier according to the present invention includes an input stage, an output stage, a feedforward type idling current control circuit, and an interrupter circuit. The output stage includes a grounded-source push-pull circuit having an output P-channel MOS transistor and an output N-channel MOS transistor. The input stage includes two differential amplifier circuits. The idling current control circuit supplies idling currents to the MOS transistors of the output stage so that the MOS transistors of the output stage perform class AB amplification operations. The interrupter circuit includes a plurality of switches which are off in a stand-by state to stop power supply to the differential amplifier circuits, stop operations of constant current circuits included in the idling current control circuit, and cancel gate-source voltages at the MOS transistors of the output stage.
    • 根据本发明的CMOS放大器包括输入级,输出级,前馈型空转电流控制电路和中断电路。 输出级包括具有输出P沟道MOS晶体管和输出N沟道MOS晶体管的接地源推挽电路。 输入级包括两个差分放大器电路。 空载电流控制电路向输出级的MOS晶体管提供空载电流,使得输出级的MOS晶体管执行AB类放大操作。 断续电路包括处于待机状态的多个开关,以停止对差分放大器电路的电源,包括在怠速电流控制电路中的恒流电路的停止操作以及在MOS处消除栅极 - 源极电压 晶体管的输出级。
    • 9. 发明授权
    • Dynamic current source for amplifier integrator stages
    • 放大器积分器级的动态电流源
    • US09473075B2
    • 2016-10-18
    • US14341364
    • 2014-07-25
    • ANALOG DEVICES, INC.
    • Sandro Herrera
    • H03F3/26H03F1/30H03F3/30H03F3/345
    • H03F1/307H03F3/301H03F3/3069H03F3/345H03F2200/264H03F2203/30015H03F2203/30036H03F2203/30061H03F2203/30063
    • An amplifier system may include a current source, an impedance element responsive to a current change, and a feedback controller generating a control signal based on impedance element response. Current source may supply current to a pair of output elements, one of which being controlled by an integrator, and a portion of the integrator. Impedance element may have terminals coupled to inputs of the output elements and may be configured to experience a change in voltage based on a change in current supplied to its input. Feedback controller may have a pair of inputs coupled to the terminals of impedance element and an output to control the current source based on a detected change in voltage across the impedance element. Current source may be varied based on the control signal to maintain a constant current supplied to the input of the impedance elements.
    • 放大器系统可以包括电流源,响应于电流变化的阻抗元件以及基于阻抗元件响应产生控制信号的反馈控制器。 电流源可以向一对输出元件提供电流,其中一个输出元件由积分器和积分器的一部分控制。 阻抗元件可以具有耦合到输出元件的输入的端子,并且可以被配置为基于提供给其输入的电流的变化而经历电压的变化。 反馈控制器可以具有耦合到阻抗元件的端子的一对输入和基于检测到的阻抗元件两端的电压变化来控制电流源的输出。 电流源可以基于控制信号而变化,以保持提供给阻抗元件的输入端的恒定电流。
    • 10. 发明授权
    • Drive circuit
    • 驱动电路
    • US08058854B2
    • 2011-11-15
    • US12343548
    • 2008-12-24
    • Norihiro KawagishiKazuyoshi Asakawa
    • Norihiro KawagishiKazuyoshi Asakawa
    • G05F1/577
    • H03F1/308H03F3/3038H03F3/68H03F2200/297H03F2203/30061
    • A drive circuit includes a plurality of output drive terminals and a plurality of push-pull circuit stages. Each of the push-pull circuit stages includes a pair of complementary transistors having a common terminal connected to a respective output drive terminal. The drive circuit further includes a plurality of first transistors connected in series with at least one of the pair of complementary transistors of the push-pull circuit stages, respectively, and a common second transistor. The common second transistor is connected with each of the plurality of first transistors to form a current mirror circuit. The drive circuit further includes a mirror current setting circuit for setting a mirror current flowing through the common transistor.
    • 驱动电路包括多个输出驱动端子和多个推挽电路级。 每个推挽电路级包括一对互补晶体管,其具有连接到相应的输出驱动端子的公共端子。 驱动电路还包括分别与推挽电路级的一对互补晶体管中的至少一个串联连接的多个第一晶体管和公共第二晶体管。 公共第二晶体管与多个第一晶体管中的每一个连接以形成电流镜电路。 驱动电路还包括用于设置流过公共晶体管的镜电流的反射镜电流设置电路。