Self-adaptive voltage regulating circuit

Abstract

The invention discloses a self-adaptive voltage regulating circuit, and belongs to the technical field of voltage regulating circuits. The circuit comprises an error amplifier, a Vref comparison signal being input into the negative electrode end of the error amplifier; a filtering circuit, the positive electrode end of the error amplifier being connected with the input end of the filter circuit, and the output end of the filter circuit being further connected with the input end of the error amplifier to form a loop; a bridge rectifier circuit, the output end of the filter circuit being connected with the input end of the bridge rectifier circuit. The bridge rectifier circuit comprises a first rectifier bridge, a second rectifier bridge, a third rectifier bridge and a fourth rectifier bridge. The first rectifier bridge and the second rectifier bridge are connected in parallel to form a first parallel circuit, the third rectifier bridge and the fourth rectifier bridge are connected in parallel to form a second parallel circuit, and the first parallel circuit and the second parallel circuit are connected in series. The output end of the third rectifier bridge is connected with the input end of the filter circuit, and the output end of the third rectifier bridge is also connected with the output end of the fourth rectifier bridge.

Description

technical field [0001] The present invention relates to the technical field of voltage regulation circuits, and more specifically relates to an adaptive voltage regulation circuit. Background technique [0002] Integrated circuit power consumption is becoming more and more important with the development of portable electronic product performance and the trend of light and small. Adaptive Voltage Scaling (Adaptive Voltage Scaling, AVS) is an effective power management technology proposed in recent years. AVS monitors The hardware adjusts the frequency according to a certain strategy, and adjusts the voltage adaptively based on the working conditions of the load, which can further reduce the power consumption of the load by 30-70%. A great feature of this technology is that it can operate without affecting system functions and Different from the dynamic voltage scaling (DVS) method based on the look-up table, the adaptive voltage scaling (AVS) technology uses the time domain e...

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Problems solved by technology

[0004] The above-mentioned patent has the following problems: the circuit cannot change the current direction of the output terminal of the comparator in time. As we all know, since the alternating current has a positive phase input and a negative phase input, the failure to adjust the output current direction in time will cause the fault of the circuit. At the same time, the comparator output The current cannot pass a larger current, it is only suitable for a small current to pass, so it has limitations

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