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公开(公告)号：US07889004B1
公开(公告)日：2011-02-15
申请号：US12571038
申请日：2009-09-30
IPC分类号： H03F3/45
CPC分类号： H03F3/45206 , H03F1/086 , H03F3/45659 , H03F2200/297 , H03F2203/45354 , H03F2203/45512 , H03F2203/45544 , H03F2203/45631 , H03F2203/45638 , H03F2203/45702 , H03F2203/45706 , H03F2203/45722
摘要： Operational amplifier embodiments are provided to enhance amplifier parameters such as bandwidth, stability, and headroom. In an amplifier embodiment, transistor followers are arranged with first and second differential pairs to facilitate selective positioning of first and second transfer function poles to enhance bandwidth and resistors and inductors are arranged to facilitate selective positioning of complex third transfer function poles to enhance phase margin. In another amplifier embodiment, the transistor followers are arranged to reduce headroom limitations to thereby enhance the voltage swing of output signals.
摘要翻译： 提供操作放大器实施例以增强放大器参数，例如带宽，稳定性和净空。 在放大器实施例中，晶体管跟随器被布置成具有第一和第二差分对，以促进第一和第二传递函数极的选择性定位以增强带宽，并且电阻器和电感器被布置成便于复杂的第三传递函数极的选择性定位以增强相位裕度。 在另一个放大器实施例中，晶体管跟随器布置成减小余量限制，从而增强输出信号的电压摆幅。
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2.发明授权Differential amplifiers with enhanced gain and controlled common-mode output level 有权具有增益增益和受控共模输出电平的差分放大器公开(公告)号：US07138865B1
公开(公告)日：2006-11-21
申请号：US11243829
申请日：2005-10-04
IPC分类号： H03F3/45
CPC分类号： H03F3/45188 , H03F3/45659
摘要： Differential amplifiers are provided with a common-mode controller that establishes an amplifier common-mode output level while it also enhances amplifier gain and output impedance. The amplifier includes cascode transistors and the controller includes positive-feedback transistors that respond to an output side of the cascode transistors and negative-feedback transistors that respond to an input side of the cascode transistors. Gain and output impedance are increased by the positive-feedback transistors and the increase is controlled by the negative-feedback transistors. Common-mode level is established by voltages between current and control terminals of the positive-feedback transistors. The differential amplifiers are shown to be especially suited for use in switched-capacitor structures.
摘要翻译： 差分放大器配有一个共模控制器，用于建立放大器共模输出电平，同时增强放大器的增益和输出阻抗。 放大器包括共源共栅晶体管，并且控制器包括响应于共源共栅晶体管的输出侧的响应的反馈晶体管以及响应于共源共栅晶体管的输入侧的负反馈晶体管。 增益和输出阻抗由正反馈晶体管增加，增加由负反馈晶体管控制。 共模电平由正反馈晶体管的电流和控制端之间的电压建立。 差分放大器被显示为特别适用于开关电容器结构。
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公开(公告)号：US07236111B2
公开(公告)日：2007-06-26
申请号：US11262049
申请日：2005-10-28
IPC分类号： H03M1/06
CPC分类号： H03F3/3076 , G11C27/026 , H03F1/32
摘要： Methods and structures are provided to enhance the linearity of amplifiers such as those which include a complementary common-collector amplifier stage. The methods and structures configure this stage so that each transistor of the stage drives an output port through a linearizing resistance. The methods and structures then control a bias current through the stage to substantially be the thermal voltage VT divided by twice the linearizing resistance.
摘要翻译： 提供了方法和结构以增强诸如包括互补公共集电极放大器级的那些的放大器的线性。 方法和结构构成了这个阶段，使得该级的每个晶体管通过线性化电阻驱动输出端口。 然后，方法和结构控制通过载物台的偏置电流，基本上被除以线性电阻的两倍的热电压V T T。
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