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Equation 6 · Part 7 · Edge AI Electronics and Sensor Systems in Practice: Quantization, Power Budgets, and Sensor Front Ends

Symbol E_inf

Ecycle=Psleep tsleep+Pactive tactive+ninf Einf,E_{\mathrm{cycle}} = P_{\mathrm{sleep}} \, t_{\mathrm{sleep}} + P_{\mathrm{active}} \, t_{\mathrm{active}} + n_{\mathrm{inf}} \, E_{\mathrm{inf}},
EinfE_{\mathrm{inf}}

What this part means

EiE_inf is one of the signed contributions combined to compute the quantity on the left.

Its job in the formula

EiE_inf is one of the signed contributions combined to compute the quantity on the left.

The passage around this formula

…is the energy spent in one full wake-sense-infer-sleep cycle, the first two terms are housekeeping power integrated over the time spent in each state, and ninfn_{\mathrm{inf}} inferences each cost a measured EinfE_{\mathrm{inf}} . Every term in that expression should be a number taken off a current probe at the actual rail, not a value copied from a component’s datasheet, because sleep current in particular is notorious for being dominated not by the processor but by whichever peripheral, pull-up, or…

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the article section

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