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1. 发明授权

US5352989A Low input resistance amplifier stage 失效
标题翻译：低输入电阻放大级
公开(公告)号：US5352989A
公开(公告)日：1994-10-04
申请号：US62810
申请日：1993-05-11
申请人： Christofer Toumazou , Martin Anding
发明人： Christofer Toumazou , Martin Anding
IPC分类号： H03F3/30
CPC分类号： H03F3/3001 , H03F3/3069
摘要： An amplifier stage suitable for current conveyors and current mode feedback operational amplifiers has low input resistance and operates at low power. The amplifier stage comprises a buffer having inverting and non-inverting inputs and a pair of current outputs, and a pair of multiple output current mirrors which operate in conjunction with the buffer to generate an output current at a high gain node in response to an input signal applied to the buffer inputs. Each multiple output current mirror has a low impedance current input for receiving current signals generated by the buffer and multiple high impedance current outputs for providing current feedback to the inverting input of the buffer and output current to the high gain node of the amplifier stage. The magnitudes of the feedback and output currents are determined by the resistances of current scaling resistors associated with the low impedance current input and each of the high impedance current outputs.
摘要翻译：适用于当前输送机和电流模式反馈运算放大器的放大器级具有低输入电阻并且以低功率运行。放大器级包括具有反相和非反相输入和一对电流输出的缓冲器，以及一对多个输出电流镜，其与缓冲器一起工作，以响应于输入在高增益节点处产生输出电流信号施加到缓冲器输入。每个多输出电流反射镜具有低阻抗电流输入，用于接收由缓冲器产生的电流信号和多个高阻抗电流输出，用于向缓冲器的反相输入端提供电流反馈，并将输出电流输出到放大器级的高增益节点。反馈和输出电流的大小由与低阻抗电流输入和每个高阻抗电流输出相关联的电流缩放电阻的电阻决定。

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