A RF/thermoelectric generator dual-mode energy harvesting system

Abstract

The invention provides a radio frequency / thermoelectric generator dual-mould energy obtaining system. The system comprises a rectification boosted circuit, a control circuit, and a voltage stabilizing circuit, wherein the rectification boosted circuit is used for respectively converting high-frequency radio frequency energy and the energy of a thermoelectric generator TEG into a first voltage and a second voltage; the control circuit is connected with the rectification boosted circuit and is used for controlling the first voltage and the second voltage which are in a preset range to be output, and is also used for using the first voltage to drive the transition of the energy of the thermoelectric generator; the voltage stabilizing circuit is connected with the control circuit; the voltage stabilizing circuit is used for direct-current alternation for the first voltage and the second voltage within the preset range so as to obtain a direct current voltage. The system can obtain the radio frequency energy of environment and the energy of the thermoelectric generator, not only much energy can be obtained, but also the radio frequency energy can be used for starting an energy obtaining function of the thermoelectric generator, so that the problem that the energy obtaining circuit of the thermoelectric generator is difficult to start due to low voltage is solved.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a radio frequency / thermoelectric generator dual-mode energy acquisition system. Background technique [0002] Obtaining energy from the environment instead of battery power supply can not only reduce the size of the device, but also reduce the cost. Radio frequency energy and heat energy widely exist in our surrounding environment. Radio frequency energy has the advantage of wide distribution, but the energy of radio frequency energy The density is not high, and the loss is large when converting radio frequency energy to DC energy, and the efficiency is low. Thermal energy has the advantage of being able to provide energy continuously and stably, but the output voltage of a thermoelectric generator (TEG) is only tens of millivolts. However, it is impossible for a normal circuit to work at such a low power supply voltage, so the thermoelectric generator (TEG) is obtained. TEG) ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a radio frequency / thermoelectric generator dual-mode energy acquisition system, which can simultaneously acquire radio frequency energy in the environment and energy of a thermoelectric generator, not only can obtain more energy, but also can use radio frequency energy to start a thermoelectric generator The energy acquisition function of the generator solves the problem that the energy acquisition circuit of the thermoelectric generator is difficult to start

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