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Battery power supply circuit, battery power supply method and mobile terminal

A technology of power supply circuit and battery power, applied in battery circuit devices, electric vehicles, circuit devices, etc., can solve problems such as filter capacitor noise, and achieve the effect of eliminating noise

Active Publication Date: 2014-12-24
XIAOMI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, embodiments of the present invention provide a battery-powered circuit, method, and mobile terminal, which are used to solve the problem that the filter capacitor produces audible noise due to battery voltage fluctuations and piezoelectric effects when MLCC is used as the filter capacitor. question

Method used

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  • Battery power supply circuit, battery power supply method and mobile terminal
  • Battery power supply circuit, battery power supply method and mobile terminal
  • Battery power supply circuit, battery power supply method and mobile terminal

Examples

Experimental program
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Embodiment 1

[0051] Please refer to figure 2 , which shows a schematic circuit diagram of the battery power supply circuit provided by Embodiment 1 of the present invention. The battery power supply circuit includes at least a first battery 202 and a second battery 204 .

[0052] The battery output end of the first battery 202 is connected to the radio frequency transmitting module 206 , and the battery output end of the first battery 202 is grounded through the first filter capacitor 208 .

[0053] The battery output terminal of the second battery 204 is connected to other chip modules 210 , and the battery output terminal of the second battery 204 is grounded through the second filter capacitor 212 .

[0054] The other chip module 210 includes at least one of a power management chip, an audio module, a video module, a control module, a storage module, a processing module, a display module and a positioning module.

[0055] To sum up, the battery-powered circuit provided by this embodi...

Embodiment 2

[0057] Please refer to Figure 3A , which shows a schematic circuit diagram of the battery power supply circuit provided by Embodiment 2 of the present invention. In this embodiment, the other chip modules are mainly used as an example for illustration. The battery-powered circuit can be implemented as part of mobile terminals such as mobile phones, tablet PCs and e-book readers. The battery power supply circuit includes at least a first battery 302 and a second battery 304 .

[0058] The battery output terminal of the first battery 302 is connected to the radio frequency transmitting module 306 , and the battery output terminal of the first battery 302 is grounded through the first filter capacitor 308 . Wherein, the battery output terminal of the first battery 302 may refer to the positive pole of the first battery 302 .

[0059] The battery output terminal of the second battery 304 is connected to the power management chip 310 , and the battery output terminal of the sec...

Embodiment 3

[0066] Since the unit power consumption of the radio frequency transmitting module and the power management chip is different in different implementation environments, in the above embodiment, it may happen that after one battery runs out of power, the other battery still has a lot of power. Condition. In order to solve this problem at the same time, better achieve noise elimination and better power supply effect, please continue to refer to the following embodiments:

[0067] Please refer to Figure 4 , which shows a schematic circuit diagram of the battery power supply circuit provided by Embodiment 3 of the present invention. In this embodiment, another chip module is still used as an example for illustration. The battery-powered circuit can be implemented as part of mobile terminals such as mobile phones, tablet PCs and e-book readers. On the basis of the above-mentioned embodiments, the battery power supply circuit also adds a first power detection module 422, a second...

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Abstract

The invention discloses a battery power supply circuit, a battery power supply method and a mobile terminal, belonging to the field of electronic circuits. The battery power supply circuit at least comprises a first battery and a second battery, wherein a battery output end of the first battery is connected with a radio-frequency emission module and is further grounded through a first filter capacitor; a battery output end of the second battery is connected with other chip modules and is further grounded through a second filter capacitor; and other chip modules at least comprise one of a power supply management chip, an audio module, a video module, a control module, a storage module, a processing module, a display module and a positioning module. According to the invention, by adoption of at least two batteries to supply power to the radio-frequency emission module and other chip modules respectively, even when the radio-frequency emission module emit a signal to make the voltage of one battery supplying power to the radio-frequency emission module fluctuate, the other battery and other chip modules cannot be influenced, and thus, the noise of the filter capacitors are weakened or removed.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a battery-powered circuit, method and mobile terminal. Background technique [0002] The power circuit usually includes a filter capacitor, and the filter capacitor generally adopts MLCC (Multi-Layer Ceramic Capacitor, chip multilayer ceramic capacitor). Equivalent series resistance) and ESL (Equivalent Series Inductance, equivalent series inductance) are small. [0003] Please refer to Figure 1A , which shows a schematic circuit diagram of a battery power supply circuit of a mobile phone. The battery power supply circuit includes a battery 110, a power management chip 120 and a radio frequency transmitting module 130 electrically connected to different battery output terminals of the battery 110, and each battery output terminal of the battery 110 is also grounded through a filter capacitor 140 for filtering . It should be pointed out that when the filter capacitor 140 ado...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H04M1/02
Inventor 孙伟李志杰刘志伟
Owner XIAOMI INC