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    • 3. 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。