Level Shifter

Level Shifter

• Purpose of this cell is to shift the signal Voltage (Low to High or High to Low) from one voltage domain to another.
• This is required when the chip is operating in multi-voltage domains.
• Generally Buffer type or Latch type Level Shifters are available.
• A Level shifter is placed in the railvoltage domain of the cell. Otherwise a new voltage area is required for such Level Shifter placement.

• Usually already present in the netlist.
• Secondary mesh is created alongside the primary.
• Level shifters on all inputs of overdrive/low voltage block to be placed inside the block.
• Placed close to the block input pins
• Level shifters are connected after virtual placement.