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公开(公告)号：US12249985B2
公开(公告)日：2025-03-11
申请号：US18184941
申请日：2023-03-16
Inventor： Feng Lu , Jing Jung Tang
IPC: H03K19/0185 , H03K3/356 , H03K17/10
Abstract: A voltage comparator circuit for a power source having an energy harvester and an energy storage. The circuit comprises a first voltage input node and a second voltage input node arranged to respectively receive a first voltage level of a first output of the energy harvester and a voltage level of a second output of the energy storage; an output node arranged to switch in response to a comparison of the first and second first voltage levels; and a plurality of semiconductor junction devices arranged to provide a floating local ground arranged to vary in response to a change of the first and/or the second voltage level, wherein the floating local ground has a voltage level higher than an absolute ground connected to the voltage comparator circuit; wherein the floating local ground is arranged to prevent a breakdown of circuit components due to a voltage difference connected at terminals of each of the circuit component exceeding a breakdown voltage of the respective circuit component.
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公开(公告)号：US20250105849A1
公开(公告)日：2025-03-27
申请号：US18475485
申请日：2023-09-27
Inventor： Feng Lu , Jing Jung Tang
Abstract: An electronic oscillator circuit and a method for controlling an oscillation frequency of a ring oscillator circuit. The circuit includes a plurality of inverter stages each Including an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the electronic oscillator circuit thereby facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter; wherein the inverters in the plurality of the inverter stages are connected to form a ring oscillator circuit.
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