The invention relates to the field of circuits, and discloses a low-
voltage cold start circuit
system for an energy acquisition circuit, which comprises a low-power-consumption
ring oscillator and a multi-stage
cascade boost
charge pump, and is characterized in that the low-power-consumption
ring oscillator is used for generating a non-overlapping anti-phase
clock signal when a first input
voltage is lower than a preset threshold value; the
voltage input end of the multi-stage
cascade boost
charge pump is connected with the direct-
current voltage output by the micro-photovoltaic panel and forms a second input voltage, the
clock input end of the multi-stage
cascade boost
charge pump is connected with the non-overlapping anti-phase
clock signal output by the low-power-consumption
ring oscillator, the second input voltage is gradually boosted to the target voltage, and the multi-stage cascade boost charge pump is connected to the energy acquisition circuit. According to the low-power-consumption ring oscillator, the low-power-consumption ring oscillator can autonomously complete self-excitation starting and generate a non-overlapping anti-phase
clock signal, the starting reliability and starting efficiency of the micro-energy collection
chip are improved, the low-power-consumption ring oscillator can efficiently drive the multi-stage cascade boost charge pump to achieve rapid transfer and step-by-step boosting of charges, and the boosting efficiency is improved.