| 摘要 |
The present disclosure provides a voltage comparator including a current source, a differential gain module and a switch module, wherein the magnitude of the current flowing through the current source is nano ampere level; the differential gain module includes a first transistor, a second transistor, a third transistor and a fourth transistor, wherein the first transistor and the second transistor are respectively connected to the current source, the third transistor and the fourth transistor form a mirror current structure, the third transistor is connected to the first transistor, and the fourth transistor is connected to the second transistor via a ninth transistor used for forming asymmetric differential gain.
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