High-frequency amplifier circuit
    7.
    发明专利
    High-frequency amplifier circuit 有权
    高频放大器电路

    公开(公告)号:JP2011155380A

    公开(公告)日:2011-08-11

    申请号:JP2010014488

    申请日:2010-01-26

    IPC分类号: H03F1/42 H03F1/08 H03F3/189

    摘要: PROBLEM TO BE SOLVED: To achieve peaking by a high-frequency amplifier circuit without using LC resonance. SOLUTION: The high-frequency amplifier circuit has a two-stage amplification configuration of a common-emitter amplifier circuit using a transistor Tr1 as a first stage and a common-emitter circuit using darlington-connected transistors Tr2, Tr3 as a second stage. A capacitive element is inserted between an emitter of the transistor Tr1 and a collector of the transistor Tr2. The capacitive element is a diode-connected transistor Tr4, the emitter of the transistor Tr4 is connected to the collector of the transistor Tr2, the base and collector of the transistor Tr4 are connected to the emitter of the transistor Tr1. The diode-connected transistor Tr4 makes a phase shift and provides feedback to improve a gain at a high frequency. COPYRIGHT: (C)2011,JPO&INPIT

    摘要翻译: 要解决的问题:通过高频放大器电路实现峰值而不使用LC谐振。 解决方案:高频放大器电路具有使用晶体管Tr1作为第一级的共发射极放大器电路的两级放大配置,以及使用达林顿连接的晶体管Tr2,Tr3作为第二级的共发射极电路 阶段。 电容元件插入在晶体管Tr1的发射极和晶体管Tr2的集电极之间。 电容元件是二极管连接的晶体管Tr4,晶体管Tr4的发射极连接到晶体管Tr2的集电极,晶体管Tr4的基极和集电极连接到晶体管Tr1的发射极。 二极管连接的晶体管Tr4进行相移并提供反馈以改善高频下的增益。 版权所有(C)2011,JPO&INPIT

    Switched capacitor amplifier circuit and method of switch-controlling the same
    8.
    发明专利
    Switched capacitor amplifier circuit and method of switch-controlling the same 审中-公开
    开关电容放大器电路及其开关控制方法

    公开(公告)号:JP2011114865A

    公开(公告)日:2011-06-09

    申请号:JP2010256731

    申请日:2010-11-17

    发明人: YUASA TACHIO EI RAI

    IPC分类号: H03F1/08 H03F3/45 H03H19/00

    摘要: PROBLEM TO BE SOLVED: To provide a switched capacitor amplifier circuit which is high-speed and highly accurate.
    SOLUTION: This switched capacitor amplifier circuit includes: an operational amplifier OA1; a reference signal generation circuit X11 which generates a reference signal VR supplied to the operational amplifier OA1; a first input capacitance C11 connected to a first input terminal of the operational amplifier OA1; a first input switch S15 which transmits a first input signal to the first input capacitance C11; a first feedback capacitance C12 for feeding back an output signal from a first output terminal of the operational amplifier OA1 to the first input terminal; a first feedback switch S12 provided between the first output terminal and the first feedback capacitance C12; and a first reset switch S21 for resetting the charge charged in the first feedback capacitance C12.
    COPYRIGHT: (C)2011,JPO&INPIT

    摘要翻译: 要解决的问题:提供高速高精度的开关电容放大器电路。 解决方案:该开关电容放大器电路包括:运算放大器OA1; 产生提供给运算放大器OA1的参考信号VR的参考信号产生电路X11; 连接到运算放大器OA1的第一输入端的第一输入电容C11; 向第一输入电容C11发送第一输入信号的第一输入开关S15; 用于将输出信号从运算放大器OA1的第一输出端子反馈到第一输入端子的第一反馈电容C12; 设置在第一输出端子和第一反馈电容C12之间的第一反馈开关S12; 以及用于复位在第一反馈电容C12中充电的电荷的第一复位开关S21。 版权所有(C)2011,JPO&INPIT

    Amplifier circuit
    10.
    发明专利
    Amplifier circuit 审中-公开
    放大器电路

    公开(公告)号:JP2010219709A

    公开(公告)日:2010-09-30

    申请号:JP2009062271

    申请日:2009-03-16

    摘要: PROBLEM TO BE SOLVED: To provide an amplifier circuit capable of suppressing return loss when increasing the amount of gain reduction.
    SOLUTION: The amplifier circuit includes: a pair of FETs 4, 5 for amplification; a current feedback circuit 15 that is connected between sources of the pair of FETs 4, 5 for amplification and can adjust the amount of gain reduction; and voltage feedback circuits 16, 17 that are connected between the drains and gates of the respective FETs 4, 5 for amplification and can adjust the amount of voltage feedback. The amount of voltage feedback in the respective voltage feedback circuits 16, 17 can be changed according to the amount of gain reduction by the current feedback circuit 15.
    COPYRIGHT: (C)2010,JPO&INPIT

    摘要翻译: 要解决的问题:提供一种当增加增益减少量时能够抑制回波损耗的放大器电路。 解决方案:放大器电路包括:用于放大的一对FET4,5; 电流反馈电路15,其连接在一对FET4,5的源极之间用于放大,并且可以调节增益减小量; 以及电压反馈电路16,17,其连接在各个FET4,5的漏极和栅极之间用于放大,并且可以调节电压反馈量。 各电压反馈电路16,17中的电压反馈量可以根据电流反馈电路15的增益减少量而改变。(C)2010,JPO&INPIT