Alternating current/direct current converter with threshold voltage compensation and without additional compensation circuit
A threshold voltage, AC-DC technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., can solve the problem of AC conversion circuit not working, affecting the application range and efficiency, low sensitivity and other problems
Active Publication Date: 2018-05-29
HUADA SEMICON CO LTD
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Problems solved by technology
Such a threshold voltage is usually higher than the input voltage of radio frequency or microwave, so that the AC conversion circuit using MOSFET cannot work at the low voltage operating point, resulting in low sensitivity, which seriously affects its application range and efficiency
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[0051] figure 1 The first embodiment of the forward AC-DC conversion circuit 100 with threshold voltage compensation without additional compensation circuit according to the present invention is shown, and its characteristic is that, firstly, the circuit 100 is a forward AC-DC conversion circuit, that is, each rectifier The voltage of the amplification stage increases step by step, and secondly, the circuit 100 compensates for the second-order threshold voltage, that is, k=2. It should be noted here that although the input voltage is shown here as a radio frequency input voltage (RFIN), this is only exemplary. In other embodiments, the input voltage can also be other alternating voltages, such as microwave voltage, grid AC change voltage etc. Furthermore, although the circuit 100 is shown here as having six rectification amplification stages, other numbers of rectification amplification stages are contemplated in other embodiments.
[0052] figure 1 The shown forward AC-DC ...
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The invention provides an alternating current / direct current converter with threshold voltage compensation and without an additional compensation circuit. The circuit can be flexibly implemented through MOSFETs, which has the advantages of low cost and high integration level. The circuit reduces the threshold voltage, so that the overall requirement for the voltage of the circuit is reduced, and the sensitivity and efficiency of the circuit are improved. In addition, through the alternating current / direct current converter, the additional compensation circuit used for threshold voltage compensation of MOSFETs on both ends of the converter is eliminated. The number of compensation devices, such as diodes and MOSFETs, required to compensate for the threshold voltage can be reduced. Circuit design and manufacturing costs are reduced.
Description
technical field [0001] The present invention generally relates to the field of electronic circuits, and more specifically relates to an AC / DC conversion circuit with threshold voltage compensation. Background technique [0002] AC-DC converters for converting AC signals into DC current or voltage are widely used in various fields, such as power supply fields, automotive fields, clean energy fields, and the like. With different application fields, the structure and function of AC-DC converters are often quite different. [0003] In the field of radio frequency or microwave energy harvesting, the task of the AC-DC converter is to convert the radio frequency or microwave signal into a DC voltage, and in the process, amplify the voltage of the input signal. [0004] In the prior art, the structure of multi-stage capacitors and diodes is often used to realize AC-DC conversion, wherein each rectification and amplification stage has a capacitor and a diode, and each rectification ...
Claims
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IPC IPC(8): H02M7/217
CPCH02M7/217
Inventor 王伟印王永流李荣信
Owner HUADA SEMICON CO LTD