| 摘要 |
A full rail-to-rail CMOS comparator is provided. The comparator includes a gain stage and a bias stage. The bias stage is responsive to the common mode input voltage level to provide a bias signal that maintains the gain stage with an optimum operating range regardless of the level of the common mode input voltage, thus maintaining the comparator output responsive to the differential input voltage. Accordingly, when operating in the optimum operating range, duty cycle distortion of the signal at the comparator output is minimized. The comparator also offers improved performance due to a lower component count and fewer comparator stages, thus decreasing power consumption and improving propagation delays.
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