Energy harvesting circuit, corresponding system and method of operation
A circuit and driver circuit technology, applied in the transmission system, circuit device, near-field transmission system, etc., can solve the problems of reducing efficiency and the structure cannot be automatically adapted
Pending Publication Date: 2021-06-04
STMICROELECTRONICS SRL
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[0014] However, this approach may have one or more of the following disadvantages: reconfiguration may be performed statically alone, e.g., only during time periods when the input power is constant; the architecture cannot automatically adapt; and during time periods when the input power varies will reduce efficiency
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[0038] In the ensuing description, one or more specific details are presented in order to provide an in-depth understanding of examples of the described embodiments. Embodiments may be presented without one or more of the specific details, or without other methods, components, materials, etc. In other instances, known structures, materials, or operations are not shown or described in detail so as not to obscure aspects of the embodiments.
[0039] References to "an embodiment" or "one embodiment" in the framework of this specification are intended to indicate that a particular configuration, structure or characteristic described with respect to the embodiment is included in at least one embodiment. Thus, phrases such as "in an embodiment" or "in one embodiment" that may appear at one or more points in this specification are not necessarily referring to one embodiment or the same embodiment.
[0040] Furthermore, particular configurations, structures or characteristics may be ...
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The embodiment of the invention relates to an energy harvesting circuit, a corresponding system and an operation method. The first RF-to-DC circuit receives a radio frequency signal and generates a first converted signal that is delivered to the energy storage circuit. The second RF-to-DC circuit is a down-scaled copy of the first RF-to-DC circuit, which generates a second converted signal from a radio frequency signal indicative of an open circuit voltage of the first RF-to-DC circuit. The first RF-to-DC portion includes N sub-stages, wherein a subset of the sub-stages is selectively enabled. A window comparison of the second converted signal generates a first signal and a second signal indicating whether the second converted signal is within a range of values proportional to the voltage reference signal. When the performed window comparisons have a first result and a second result, respectively, a subset of the sub-stages is selectively disabled or enabled, respectively.
Description
[0001] priority statement [0002] This application claims priority from Italian Patent Application No. 102019000022950 filed December 4, 2019, the contents of which are hereby incorporated by reference in their entirety to the fullest extent permitted by law. technical field [0003] This description relates to energy harvesting. [0004] One or more embodiments may find use in a variety of applications, such as in RF energy harvesting devices, such as ultra-low power (nanowatt) RF for battery-less systems such as wireless battery chargers or wireless sensor platforms. energy harvesting applications. Background technique [0005] In energy harvesting (or by other names, power harvesting or energy scavenging), energy from one or more sources (such as solar panels, wind generators, various types of thermal generators) is stored for use in Possible use in devices such as wireless portable devices or wireless sensors (eg, in wireless sensing platform applications). [0006]...
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Login to View More IPC IPC(8): H02J50/00H02J50/20
CPCH02J50/001H02J50/20H02J50/27H04B5/79
Inventor R·拉罗萨A·菲诺基亚洛
Owner STMICROELECTRONICS SRL