| ??? 10/03/06 22:07 Read: times |
#125777 - Size Responding to: ???'s previous message |
Darren Heywood said:
Check power consumption of VHC against original TTL. Kai did that. Device rail shrinkage means higher speed, AMD,PENTIUM=1.6V but runs at 2GHz, how can we account for that? This completely controversial since everybody has been thinking that high frequency means high power, clearly it doesn't. Surely its obvious ? area for area, higher speed is ALWAYS higher power, that's pure physics, as others have pointed out, smaller devices roughly = higher speed, transit times are shorter, ( no device can switch faster than electrons can cross the depletion zone under the gate) interconnects are shorter and proportionately less power is consumed, so a device a hundred times smaller consumes 100 times less power, say, so you can clock it 10X faster, whilst packing 100 times more devices in a given space. Of course your capacitances are now climbing, and you have increasingly high reactive currents flowing. These currents still dissipate in your resistive elements, though the reactances themselves consume no real power, and your devices continue to get hot. Steve |
