Re: difference between power gating and clock gating
Power Gating:In a processor chip, certain areas of the chip will be idle and will be activated only for certain operations. But these areas(cmos) are still provided with power for biasing. The power gating limits this unnecessary power being wasted by shutting down power for that area and resuming whenever needed.
Clock Gating: clock gating limits the clock from being given to every register or flops in the processor.In clock gating the gated areas will still be provided with bias power.