US Patent 7768334 Semiconductor integrated circuit

A semiconductor integrated circuit has a plurality of clock tree cells arranged in a tree structure on clock signal lines transmitting a clock signal, the plurality of clock tree cells forming a clock tree. The clock tree cells include first power supply lines connected to the clock tree cells, second power supply lines connected to logic circuits receiving a clock signal supplied from the clock tree, and a plurality of power supply pads connected to the first power supply lines and the second power supply lines.