| 摘要 |
An apparatus and method for comparing two input voltages. The apparatus being a comparator circuit comprising a pair of series connected polycrystalline transistors, two capacitors and a switch, the switch being connected between the point of series connection of the transistors and a node to which one side of each capacitor and the gates of the transistors are connected in common, with the other side of each capacitor being operably connected to a respective input. The method comprising: providing a comparator having a pair of series connected polycrystalline transistors, two capacitors and a switch, the switch being connected between the point of series connection of the transistors and a node to which one side of each capacitor and the gates of the transistors are connected in common, closing the switch to transfer a bias voltage to the node, storing the bias voltage on the capacitors, opening the switch, applying each input voltage to a respective one of the capacitors, and detecting any resultant change in the bias voltage.
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