DELAY CELL

 DELAY CELL

    Delay cell is used to fix the hold violation, the internal structure of the delay cell is the back to back connection of Inverters  is called Delay buffer cell, The cascade connection of two different drive strength buffers is called delay cell. 

    If the 1st cell is driving inverter drive strength is high no issues otherwise it may not have the driving capable to drive the followed inverter cell it may introduce the delay in the delay cell based on the output cap delay will incerease which means the output cap will take lot of time to charge the capacitor that's why it is introducing the delay in delay cell