Energy scavenging interface, method for operating the energy scavenging interface, and energy harvesting system comprising the energy scavenging interface

摘要

An energy scavenging interface (24) having an input port (25', 25"), which can be connected to a storage element (22b) of a transducer that generates an electrical signal, and an output port (26', 26") for supplying an output signal (V OUT ) to an electrical load (27, 28), comprising: a first switch (30) that receives the input signal; a second switch (36) that supplies the output signal; and a control logic (60) configured for: closing the first switch and opening the second switch for a first time interval having a first temporal duration (T DELAY ); acquiring a scaled copy (I p /K) of the peak value (Ip) of the electric current accumulated in the storage element during the first time interval; opening the first switch and closing the second switch (36) for supplying the electrical load; and keeping them in this state as long as the current value of the output signal (I OUT ) is greater than the value of said scaled copy (Ip/K) of the peak value.