Clock extraction element and eye pattern test equipment

The utility model provides a clock extraction element, including optical divider, PIN photodiode, limiting amplifier, clock and data recovery unit, wherein, optical divider with the PIN photodiode connection PIN photodiode with limiting amplifier connects, limiting amplifier with clock and data recovery unit connection. The utility model also provides an eye pattern test equipment. The beneficial effects of the utility model are that: realized that the clock draws the function for a plurality of test systems digital oscilloscope that can share has improved digital oscilloscope's utilization ratio, the cost is reduced.