Minimize parasitic capacitance to any ac ground for all of the signal I/O pins. Parasitic capacitance on the
output and input pins can cause instability. To reduce unwanted capacitance, a window around the signal I/O
pins should be opened in all of the ground and power planes around those pins. Otherwise, ground and
power planes should be unbroken elsewhere on the board.
THS3071 37页
说为了减少寄生电容，需要把I/O PIN下面的铜挖开，其DEMO也是这么做的，这个可以理解。
但有说“Otherwise, ground and power planes should be unbroken elsewhere on the board.”
否者要保持电源层铜完整，这个怎么理解了，铜完整就能避免寄生电容吗？其原理是什么呢？
