| 摘要 |
An operational amplifier including a primary differential input pair, a primary tail current source module, N auxiliary differential input pairs, and N auxiliary tail current source modules is disclosed. A first and a second input terminal of the primary differential input pair respectively receive a first and a second input signal, wherein first input signal and the second input signal are differential to each other. The primary tail current source module supplies a tail current to the primary differential input pair during a first time interval. A first and a second input terminal of each of the auxiliary differential input pairs respectively receive the first and the second input signal. Each of the auxiliary tail current source modules supplies an auxiliary tail current to the corresponding auxiliary differential input pair during a second time interval. The first time interval and the second time interval partially overlap each other.
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