How to become a senior digital IC Design Engineer (5-3) theory: ULP low power design technology (Part 2)

-- Total power consumption Ptotal = Static power consumption Pdynamic + Dynamic power consumption Pstatic = standby leakage + Flip power consumption + Short circuit power consumption
---- Static power consumption = standby leakage (Leakage Power)
------ Mainly by Isub and Igate Composed of
------ And temperature 、VGS - VTH There is a positive correlation
------ Empirical formula ： Every time the temperature rises 20 Centigrade , Static leakage doubled
---- Dynamic power consumption = Flip power consumption (Switch Power) + Short circuit power consumption (Internal Power)
---- Flip / Switching power consumption
------ Power consumption caused by signal reversal
------Pdyn = (CL)(Vdd^2)(Ptrans)(Fclock)
------ Load capacitance 、 Supply voltage 、 Flip probability （ The average conversion times of each clock through the whole circuit ）、 clock frequency
------ Power consumption can be reduced by reducing the load of high-power signals
---- A short circuit / Internal power consumption
------ The signal is changing ,MOS Power consumption caused by simultaneous conduction of tubes
------Pdyn = (Tsc)(Vdd)(Ipeak)(Fclock)
------ Short circuit time 、 Supply voltage 、 Flip current 、 The system clock
------ And signal conversion time Transition、 The turnover probability is positively correlated

The power source is mainly surge current 、 Static power and dynamic power , Dynamic power consumption is divided into short-circuit power consumption （ Internal power consumption ） And switching power consumption （ Flip power consumption ）.
Surge current refers to the maximum instantaneous input current generated when the device is powered on , Also called starting current , It is usually several times more than the normal full load current .
Static power consumption ：1、 In number CMOS In circuit , Power consumption caused by the leakage current of the transistor ;2、 Standby current ： It refers to after turning off the main power supply or main system , Current generated when entering standby mode .
Because static power consumption is generally related to process devices , Not discussed &#x