套筒式结构运放为什么很难使输入和输出短接
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大家好，套筒式结构运放为什么很难使输入和输出短接，谢谢！
Generally, telescopic opamp Input CM range is too small to cover telescopic opamp Output Signal range (including CM+DM components)。Once output signal range exceed telescopic opamp Input CM range，the performance (eg. gain/bandwith) of telescopic opamp will degrade.
However, in case that the input signal is a DC voltage level and within the Input CM range of telescopic opamp, the input and output terminals of telescopic opamp can be connected directlty to configure a non-inverting gain (=1) amplifier/buffer.
因为输入共模点的问题
这书上不是说的很明白吗
明白了，谢谢大家的解答
overlap of input and output range is little
学习了.
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