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Portable electronic device

An electronic device and portable technology, which can be used in measurement devices, data processing power supplies, measurement flow/mass flow, etc., and can solve problems such as leakage of gyroscope sensors, potential safety hazards of portable electronic devices, and voltage differences.

Inactive Publication Date: 2014-12-31
SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the system is powered off, because the power-off sequence of the power pin VLOGIC is later than that of the power pin VDD, the gyroscope sensor will continue to leak for a period of time, that is, the power pin VLOGIC will flow to the power pin VDD output current and produces a voltage difference of 1V
Since the current direction is opposite to the current direction of the system supplying power to the power pin VDD, it is easy to bring safety hazards to the use of portable electronic devices

Method used

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  • Portable electronic device

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Embodiment Construction

[0011] see figure 1 , a preferred embodiment of the present invention provides a portable electronic device 100, which can be a mobile phone, a tablet computer, a personal digital assistant (Personal Digital Assistant, PDA) and other terminals.

[0012] The portable electronic device 100 includes a power management integrated circuit (PMIC) 10 , a gyroscope sensor (gyroscope sensor) 20 , a delay circuit 30 and a voltage regulator circuit 40 .

[0013] The power management chip 10 is used to output the system voltage V to drive multiple electronic components of the portable electronic device 100 , such as the gyroscope sensor 20 , the delay circuit 30 and the voltage regulator circuit 40 .

[0014] The gyro sensor 20 is used for sensing parameters such as the acceleration of gravity and the rotation speed of the portable electronic device 100 . The gyroscope sensor 20 includes a first voltage pin VDD, a second voltage pin VLOGIC and other function pins, such as I2C pins (not s...

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PUM

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Abstract

The invention provides a portable electronic device. The portable electronic device comprises a gyro sensor, a power supply management chip, a time delay circuit and a voltage stabilizing circuit, wherein the gyro sensor comprises a first voltage pin and a second voltage pin, the first voltage pin is electrically connected with the power supply management chip to obtain system voltage output by the power supply management chip, the time delay circuit is electrically connected between the power supply management chip and the voltage stabilizing circuit to facilitate the power supply management chip to start / enable the voltage stabilizing circuit in delay time through the time delay circuit, and the voltage stabilizing circuit is electrically connected with the power supply management chip and the second voltage pin of the gyro sensor and is used for outputting stable drive voltage to the second voltage pin. The portable electronic device can guarantee that the second voltage pin does not continuously leak current to the first voltage pin when the system is powered off.

Description

technical field [0001] The invention relates to a portable electronic device, in particular to a portable electronic device using gyroscope sensing technology. Background technique [0002] At present, most portable electronic devices such as mobile phones and tablet computers have built-in gyroscope sensors for sensing parameters such as acceleration of gravity and rotational speed of the electronic devices. Existing gyroscope sensors are powered by two voltages, that is, a power management chip (Power Management Integrated Circuit, PMIC) needs to supply power to the power supply pins VDD and VLOGIC of the gyroscope sensor respectively. However, when the system is powered off, because the power-off sequence of the power pin VLOGIC is later than that of the power pin VDD, the gyroscope sensor will continue to leak for a period of time, that is, the power pin VLOGIC will flow to the power pin VDD outputs the current and produces a voltage difference of 1V. Since the current...

Claims

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Application Information

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IPC IPC(8): G06F1/26
Inventor 李成龙
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD