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A network terminal and its circuit for realizing power-down information reporting

A technology of electrical information and circuits, which is applied in the field of network terminals and circuits for reporting power-off information. It can solve the problems of large volume and large space of electrolytic capacitors, and achieve the effects of saving space, small size and improving reliability.

Active Publication Date: 2015-09-23
PHICOMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, an electrolytic capacitor with a large capacitance will also have a large volume, and the space it occupies on the PCB will also be large.

Method used

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  • A network terminal and its circuit for realizing power-down information reporting
  • A network terminal and its circuit for realizing power-down information reporting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] figure 1 It is a logic diagram of Embodiment 1 of a circuit for reporting power-down information in the present invention. The circuit for reporting power-down information is connected to a DC power supply (+12V) and a CPU, and is used to report power-down information when the DC power supply is powered off. to the CPU, and then sent by the CPU to the central office through the network. The circuit for reporting power-down information includes a first electrolytic capacitor, a charging module 10 and a detection control module 20, and the charging module 10 is used to supply power to the DC power supply normally and the voltage of the first electrolytic capacitor does not reach a preset value. Charge the first electrolytic capacitor according to the control signal (Control) of the CPU, wherein the preset value is greater than the supply voltage of the DC power supply; the detection control module 20 is used to discharge through the first electrolytic capacitor when the D...

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PUM

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Abstract

The invention discloses a network terminal and a circuit, capable of achieving a report of power down information, of the network terminal. The circuit capable of achieving the report of power down information comprises a first electrolytic capacitor, a charging module and a detection control module, wherein the charging module is used for normally supplying power for a direct current power source, when voltage of the first electrolytic capacitor does not reach a preset value, charging to the first electrolytic capacitor is carried out according to a control signal of a central processing unit (CPU), wherein the preset value is larger than the supply voltage of the direct current power source, and the detection control module is used for supplying power for the CPU through discharging of the first electrolytic capacitor when power down of the direct current power source is detected, and sending a power down signal to the CPU. According to the network terminal and the circuit, discharging time of the power down of the direct current power source can be effectively improved, and therefore reliability of achieving dying gasp can be improved, and space of printed circuit board (PCB) is saved.

Description

technical field [0001] The invention relates to the field of power-off management, in particular to a network terminal and a circuit for realizing reporting of power-off information. Background technique [0002] Current network terminals (such as DSL, PON, etc.) need to report information to the central office when a power failure occurs, that is, to send a Dying GASP signal. At present, network terminal products generally use DC 12V power supply, and use the power supply voltage to directly charge the electrolytic capacitor for energy storage, so that when the DC power supply is powered off, the electrolytic capacitor is discharged to report information. However, due to chip differences, the power-off trigger voltage should not be too high, and sufficient margin must be reserved to prevent false triggering. Generally, the power supply voltage of the DC power supply is set to be as low as about 10V before the information is reported. Due to the low voltage, the capacitance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/10
Inventor 杨万里
Owner PHICOMM (SHANGHAI) CO LTD