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Power supply circuit and electronic equipment

A technology of power supply circuit and power supply voltage, which is applied in the electronic field to achieve the effect of improving power consumption

Inactive Publication Date: 2019-10-22
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the invention is how to reduce the energy consumption of the power supply circuit as much as possible to reduce power consumption

Method used

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  • Power supply circuit and electronic equipment
  • Power supply circuit and electronic equipment
  • Power supply circuit and electronic equipment

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Experimental program
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Effect test

Embodiment Construction

[0030] As mentioned in the background section, the power supply circuit in the prior art includes a normally-on module, and it is difficult to reduce power consumption.

[0031] The inventors of the present application conducted an in-depth analysis of the prior art. figure 1 It is a circuit diagram of an existing power supply circuit for NB-IOT. Such as figure 1 As shown, the power supply circuit 100 for NB-IOT may include a bandgap reference source 101, a voltage comparator 102, a voltage divider circuit composed of a resistor R1 and a resistor R2, and a P-channel Metal Oxide Semiconductor (P-channel MetalOxide Semiconductor , PMOS for short) switch tube P1, wherein the voltage divider circuit has a voltage divider node A for the output voltage Vo of the NB-IOT power supply circuit 100, which provides and maintains a certain voltage for the load resistor RL. The voltage comparator 102 compares the voltage V1 output by the bandgap reference source 101 with the voltage V2 ou...

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PUM

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Abstract

The invention relates to a power supply circuit and electronic equipment. The power supply circuit comprises a power supply module which generates a power supply voltage under control of a control signal, a frequency generating module which is connected to the output end of the power supply module and generates a clock signal, whose frequency changes with the voltage value of the power supply voltage, according to the power supply voltage, and a frequency comparison module for comparing the frequency of the clock signal with that of a reference clock signal and generating the control signal according to a comparison result. Thus, power consumption of the power supply circuit can be reduced as possible, and energy loss of the equipment can be also reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a power supply circuit and electronic equipment. Background technique [0002] In recent years, Narrow Band Internet of Things (NB-IOT) technology has developed extremely rapidly, making the types of NB-IOT application products more and more abundant. Typical application products include smart home equipment, IoT smart wearable devices (also known as wearables). In typical NB-IOT product applications, the voltage of the power supply circuit required to maintain NB-IOT operation is very small, about 0.9V; moreover, the current of the power supply circuit is also very small, the magnitude is about microampere ( μA) level. [0003] There are mainly two types of power supply circuits for NB-IOT in the prior art. One is a voltage maintenance circuit composed of a reference power supply, a comparator, a voltage divider circuit, and a switch tube. However, each of the above-menti...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 杨家奇黄正乙邓志兵
Owner SEMICON MFG INT (SHANGHAI) CORP
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