| 摘要 |
An input stage, an error compensable level-shift stage and an output stage form in combination an operational amplifier circuit, and the error compensating level-shift stage includes an inverting transistor coupled to an input node of a current mirror circuit and responsive to an output potential level of the input stage for controlling an output potential level of the current mirror circuit and a constant current source coupled to the output node of the current mirror circuit so as to eliminate influence of unitentional variation of the channel doping level of the inverting transistor from the output potential level at the output node.
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