CN201243277Y

CN201243277Y - Access case

Info

Publication number: CN201243277Y
Application number: CNU2008201344497U
Authority: CN
Inventors: 季晓宇
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-08-19
Filing date: 2008-08-19
Publication date: 2009-05-20
Anticipated expiration: 2018-08-19

Abstract

The utility model discloses an access box for realizing long time standby, which comprises a power supply module, a customer interface circuit module, a radio-frequency module and a fax subcard; wherein, the power supply module includes a power supply unit, a first two-level power management chip, a second two-level power management chip and an interrupt impulse unit; wherein, the power supply unit can supply power for the first two-level power management chip and the second two-level power management chip in parallel connection; the first two-level power management chip can independently output the voltage to the customer interface circuit module,; the second two-level power management chip can respectively output the voltage to the radio-frequency module, the fax subcard and an interrupt impulse circuit; the radio-frequency module is respectively connected with the first two-level power management chip and the customer interface circuit module in order to control the first two-level power management chip through the CPU inside and regularly detect the state of the customer interface circuit module; through the parallel method to array the power management chip, the acccess box solves the problem of short standby time of prior access box.

Description

A kind of access box

Technical field

The utility model relates to communication technical field, relates in particular to a kind of access box.

Background technology

The structure of present access box as shown in Figure 1, mainly comprise: power unit, module section, SLIC (user interface circuit) partly, fax board daughter card part, wherein each power management chip all is that mode with serial connects in the circuit of power unit, the access box standby current of being made is all about 100ma, bigger, also can only adhere to about 15 hours with the battery of 1800mah.

And, the standby current for general access box about 100ma, it is many wherein just to have been accounted for 50ma by the used up electric current of SLIC part, and power consumption is bigger.

The utility model content

In view of above-mentioned analysis, the utility model aims to provide a kind of access box, in order to solve the too short problem of access box stand-by time that exists in the prior art.

The utility model comprises: power module, the user interface circuit module, radio-frequency module and fax subcard, described power module comprises: power supply unit, the first secondary power supply managing chip D2, the second secondary power supply managing chip D3, the interruption pulse unit, wherein, power supply unit is given the first secondary power supply managing chip D2 in parallel and second secondary power supply managing chip D3 power supply respectively, the independent output voltage of the first secondary power supply managing chip D2 is given the user interface circuit module, and second secondary power supply managing chip D3 output voltage respectively gives radio-frequency module, fax subcard and interruption pulse circuit; Radio-frequency module is connected with the user interface circuit module with the first secondary power supply managing chip D2 respectively, by its inner CPU the first secondary power supply managing chip D2 is enabled control, and regularly detects the state of user interface circuit module.

Further, described interruption pulse unit specifically comprises: first resistance R 1, second resistance R 2, the 3rd resistance R 3, touch-switch) and NPN triode Q1, wherein, be serially connected with second resistance R 2 between the emitter of NPN triode Q1 and the base stage, be serially connected with the 3rd resistance R 3, first resistance R 1 and touch-switch S between the collector electrode of NPN triode Q1 and the base stage successively.

The utility model beneficial effect is as follows:

The utility model is arranged power management chip by parallel mode, and allow SLIC power management independently, the circuit of shutoff SLIC that can the be successful and circuit of other parts is not had any impact has solved and has caused the short problem of stand-by time because of the SILC electric current is excessive.

Description of drawings

Fig. 1 is the structured flowchart of the access box of prior art

Fig. 2 is the structured flowchart of the utility model embodiment.

Embodiment

Standby current for general access box about 100mA, it is many wherein just to have been accounted for 50mA by the used up electric current of SLIC (user interface circuit) part, so be necessary to redesign in this part, because the startup of slic circuit is than very fast, the utility model is by making the design of DC-DC power supply chip into parallel mode at power end, increase by one road SLIC power supply, allow the power supply independent design of SLIC part, enable to be turn-offed smoothly and do not influence the work of other parts, at incoming call with go two kinds of patterns of electricity to enable with module respectively and the manual mode that enables is carried out open-minded to the power supply of SLIC part respectively.

Specifically describe preferential embodiment of the present utility model below in conjunction with accompanying drawing, wherein, accompanying drawing constitutes the application's part, and is used from explaination principle of the present utility model with embodiment one of the present utility model.

As shown in Figure 2, Fig. 2 is the structured flowchart of the utility model embodiment, specifically can comprise: power module, radio-frequency module, SLIC module, fax board daughter card, wherein, described power module comprises: power supply unit, two secondary power supply managing chip-first secondary power supply managing chip D2 and the second secondary power supply managing chip D3, interruption pulse unit; Power supply unit is given the first secondary power supply managing chip D2 in parallel and second secondary power supply managing chip D3 power supply respectively, after the first secondary power supply managing chip D2 carries out the lowering and stabilizing blood pressure processing, give the power supply of SLIC unit separately, after the second secondary power supply managing chip D3 carries out the lowering and stabilizing blood pressure processing, to radio-frequency module, fax subcard and the power supply of interruption pulse unit; Radio-frequency module includes CPU, the first secondary power supply managing chip D2 enables the control by the CPU of radio-frequency module, when CPU receives the external interrupt low level pulse signal of incoming call or the transmission of interruption pulse unit, will enable D2 by GPIO (general input/output port), D2 is started working, and D2 can start and start working for the SLIC module for power supply smoothly by the SLIC module simultaneously.

Described interruption pulse unit comprises: first resistance R 1, second resistance R 2, the 3rd resistance R 3, touch-switch S and NPN triode Q1, wherein, the emitter of NPN triode Q1 and base stage directly are serially connected with second resistance R 2, are serially connected with the 3rd resistance R 3, first resistance R 1 and touch-switch S between the collector electrode of NPN triode Q1 and the base stage successively; First resistance R 1 and second resistance R 2 are bleeder circuit, and the 3rd resistance R 3 is a pull-up resistor, and the voltage that P is ordered is height; When the base stage of the closed moment Q1 of touch-switch S is a high level, then triode moment conducting can produce a low level at collector electrode P point, is sent to radio-frequency module, as the external interrupt triggering of radio-frequency module.

The utility model specific implementation process is as following description:

When send a telegram here in the outside, radio-frequency module is opened all the time, the CPU of radio-frequency module can send instruction by GPIO (general input/output port) D2 is enabled when receiving incoming call, D2 is opened, radio-frequency module can be checked the state of SLIC simultaneously, and to SLIC output bell signal, all the time the state of periodic test SLIC module, in the time of end of conversation, as continuous several cycle SLIC not at off-hook and ringing condition the time, radio-frequency module can be thought end of conversation, then by GPIO control D2, D2 is turn-offed, enter electricity-saving state.

When the user will insert box and made a phone call in the outside by this, give external interrupt pulse of module by button touch-switch S earlier, when receiving this pulse, module can enable D2, allow D2 carry out work, thereby open the circuit of SLIC part, enter the state of making a phone call, in the time of end of conversation, also be by the GPIO mouth, allow module control the shutoff of D2.

In sum, the utility model embodiment provides a kind of access box of realizing long-time standby, arrange power management chip by utilizing parallel mode, and allow SLIC power management independently, the circuit of shutoff SLIC that can the be successful and circuit of other parts is not had any impact has solved and has caused the short problem of stand-by time because of the SILC electric current is excessive.

The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.

Claims

1, a kind of access box, comprise: power module, the user interface circuit module, radio-frequency module and fax subcard, it is characterized in that, described power module comprises: power supply unit, the first secondary power supply managing chip (D2), the second secondary power supply managing chip (D3), the interruption pulse unit, wherein, power supply unit is given the power supply of the first secondary power supply managing chip (D2) in parallel and the second secondary power supply managing chip (D3) respectively, the first secondary power supply managing chip (D2) output voltage is separately given the user interface circuit module, and the second secondary power supply managing chip (D3) output voltage is respectively given radio-frequency module, fax subcard and interruption pulse circuit; Radio-frequency module is connected with the user interface circuit module with the first secondary power supply managing chip (D2) respectively, by its inner CPU the first secondary power supply managing chip (D2) is enabled control, and regularly detects the state of user interface circuit module.

2, according to the described access box of claim, it is characterized in that, described interruption pulse unit specifically comprises: first resistance (R1), second resistance (R2), the 3rd resistance (R3), touch-switch (S) and NPN triode (Q1), wherein, be serially connected with second resistance (R2) between the emitter of NPN triode (Q1) and the base stage, be serially connected with the 3rd resistance (R3), first resistance (R1) and touch-switch (S) between the collector electrode of NPN triode (Q1) and the base stage successively.