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    • 9. 发明申请
    • Wide dynamic range switching variable gain amplifier and control
    • 宽动态范围切换可变增益放大器和控制
    • US20060290420A1
    • 2006-12-28
    • US11166089
    • 2005-06-27
    • Min Zou
    • Min Zou
    • H03F1/14
    • H03F3/211H03F3/72H03F2200/447H03F2200/78H03F2203/21191H03F2203/7227H03G1/0035H03G1/0088
    • A plurality of variable gain amplifier stages are coupled by an attenuation circuit that receives a voltage input to be amplified. A control circuit activates each of the variable gain amplifier stages in a seamless manner in accordance with a control signal applied to a voltage control node, while maintaining no more than one of the stages active at any time. Fractions of the reference signal voltage level are set to define boundaries between control voltage level ranges of the amplifier stages. A unique control voltage level range is thus established for each amplifier stage. A control voltage hysteresis range can be provided to avoid oscillations between stages at the transition voltages.
    • 多个可变增益放大器级由接收要放大的电压输入的衰减电路耦合。 控制电路根据施加到电压控制节点的控制信号以无缝的方式激活每个可变增益放大器级,同时在任何时间保持不超过一个级有效。 参考信号电压电平的分数被设置为限定放大器级的控制电压电平范围之间的边界。 因此,为每个放大器级建立了独特的控制电压电平范围。 可以提供控制电压滞后范围以避免在转换电压下的级之间的振荡。