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首页> 外文期刊>IEEE Transactions on Circuits and Systems. 1 >A compensation strategy for two-stage CMOS opamps based on current buffer
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A compensation strategy for two-stage CMOS opamps based on current buffer

机译:基于电流缓冲器的两级CMOS运算放大器的补偿策略

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摘要

The compensation with current buffer overcomes the typical drawbacks of the compensations based on nulling resistor or voltage buffer, but it is not as straightforward as the other two approaches. Indeed, a constraint on the current-buffer input resistance has to be met in order to achieve frequency compensation, since complex conjugate poles arise in the loop transfer function. Design equations for an optimized compensation strategy with current buffer are determined. They allow a high gain-bandwidth product to be achieved avoiding the drawbacks which arises with voltage buffer and nulling resistor approaches.
机译:使用电流缓冲器进行的补偿克服了基于调零电阻或电压缓冲器进行补偿的典型缺点,但是它不像其他两种方法那样简单。实际上,由于回路传递函数中会出现复杂的共轭极,因此必须满足对电流缓冲器输入电阻的限制才能实现频率补偿。确定具有电流缓冲器的优化补偿策略的设计方程式。它们可以实现高增益带宽乘积,从而避免了电压缓冲器和调零电阻器方法带来的缺点。

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