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    • 5. 发明申请
    • AN AMPLIFIER
    • 放大器
    • WO00035079A1
    • 2000-06-15
    • PCT/SE1999/002050
    • 1999-11-11
    • H03F1/32H03F3/30
    • H03F1/3217H03F3/3072
    • An amplifier includes a first transistor (T1) whose emitter is connected to an amplifier output (Y) and whose collector is connected to a first (V ) of two current supply terminals (V , V ), wherewith the base of the first transistor (T1) is connected to an input (X). A constant load circuit (10) is connected between the emitter of the first transistor (T1) and the second current supply terminal (V ). The constant load circuit (10) is adapted to ensure that the current through the first transistor (10) will always exceed a lowest value, so that the first transistor (T1) will always lie in a limited, generally linear area of its working curve.
    • 放大器包括其发射极连接到放大器输出(Y)并且其集电极连接到两个电流源端子(V +,V - )的第一(V +))的第一晶体管(T1) ,其中第一晶体管(T1)的基极连接到输入(X)。 恒压负载电路(10)连接在第一晶体管(T1)的发射极和第二电流源端子(V - )之间。 恒定负载电路(10)适于确保通过第一晶体管(10)的电流将始终超过最低值,使得第一晶体管(T1)将始终位于其工作曲线的有限的,大致线性的区域中 。
    • 6. 发明申请
    • A BRIDGED DRIVING AMPLIFIER AND A TELECOMMUNICATION DEVICE
    • 桥式驱动放大器和电信设备
    • WO98045939A2
    • 1998-10-15
    • PCT/IB1998/000291
    • 1998-03-05
    • H03F3/68H03F3/217H03F3/30
    • H03F3/3072H03F3/3081
    • Known is a bridged driving amplifier for driving a capacitive load which is coupled between a first and a second output terminal of the bridged driving amplifier, which bridged driving amplifier comprises a first driving section coupled between a first supply rail and the first output terminal, a second driving section coupled between the second output terminal and a second supply rail, a third driving section coupled between the first supply rail and the second output terminal, and a fourth driving section coupled between the first output terminal and the second supply rail, whereby the bridged driving amplifier is AC-driven such that the first and the second section, when driven, cause an output voltage across the capacitive load of a given polarity, and the third and the fourth section, when driven, cause an output voltage across the capacity load of a polarity opposite to the given polarity. To improve the efficiency of such a bridged driving amplifier, a bridged driving amplifier is proposed comprising inhibiting means for inhibiting that at least a part of the supply current is inhibited when discharging the capacitive load during voltage state changing of the voltage across the capacitive load from the one polarity to the other polarity.
    • 已知的是用于驱动耦合在桥接驱动放大器的第一和第二输出端之间的电容性负载的桥接驱动放大器,该桥接驱动放大器包括耦合在第一电源轨和第一输出端之间的第一驱动部, 耦合在第二输出端子和第二电源轨道之间的第二驱动部分,耦合在第一电源轨道和第二输出端子之间的第三驱动部分和耦合在第一输出端子和第二电源轨道之间的第四驱动部分, 桥接驱动放大器是交流驱动的,使得第一和第二部分在被驱动时引起给定极性的电容性负载两端的输出电压,而第三和第四部分在驱动时引起跨过容量的输出电压 与给定极性相反的极性负载。 为了提高这种桥接驱动放大器的效率,提出了一种桥接驱动放大器,其包括禁止装置,用于在跨过容性负载的电压的电压状态改变期间放电电容性负载时抑制至少一部分供电电流被阻止 一个极性与另一极性。
    • 8. 发明授权
    • METHOD FOR DOUBLE SAMPLING LOOP NEGATIVE FEEDBACK AND DOUBLE SAMPLING NEGATIVE FEEDBACK AMPLIFIER
    • 双采样环负反馈和双采样负反馈放大器的方法
    • EP1788700B1
    • 2010-11-03
    • EP05774340.3
    • 2005-08-10
    • Zhou, Zongshan
    • Zhou, Zongshan
    • H03F1/34H03F1/32H03F3/20
    • H03F3/45085H03F1/32H03F1/3211H03F1/34H03F3/20H03F3/3069H03F3/3072H03F3/3074H03F3/45094
    • The invention discloses a method for double sampling loop negative feedback including the following steps: obtaining a low frequency feedback signal from a output of an amplifier; obtaining a high frequency feedback signal from a high frequency low phase-shifted part of the amplifier; wherein the amplified phase of the two way sampling signal is the same; combining the two way sampling signal to form a signal that both the high and low frequency phase-shifted are low, and this sigil is used for loop negative feedback. The invention also discloses a double sampling negative feedback amplifier, including a voltage amplified circuit a output buffering circuit, a high speed buffering circuit, a series capacitor-inductor double sampling combining circuit and a feedback network. The method of the invention has the characteristic of changing frequency quickly so that the output stage of the amplifier can obtain higher feedback depth just by using lesser band width thus it can reduce the difficulty of realizing deep loop negative feedback.
    • 本发明公开了一种双采样环路负反馈的方法,包括以下步骤:从放大器的输出端获取低频反馈信号; 从放大器的高频低相移部分获得高频反馈信号; 其中双向采样信号的放大的相位是相同的; 将双向采样信号组合以形成信号,即高频和低频移相低,并且该印记被用于环路负反馈。 本发明还公开了一种双采样负反馈放大器,包括电压放大电路,输出缓冲电路,高速缓冲电路,串联电容 - 电感双采样组合电路和反馈网络。 本发明的方法具有快速改变频率的特点,使得放大器的输出级只需使用较小的带宽即可获得较高的反馈深度,从而可以减少实现深度环路负反馈的难度。