CN1070015C - Power supply for wireless PBX - Google Patents
Power supply for wireless PBX Download PDFInfo
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- CN1070015C CN1070015C CN97121800A CN97121800A CN1070015C CN 1070015 C CN1070015 C CN 1070015C CN 97121800 A CN97121800 A CN 97121800A CN 97121800 A CN97121800 A CN 97121800A CN 1070015 C CN1070015 C CN 1070015C
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- power supply
- changeover device
- supply changeover
- output
- wireless pbx
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Abstract
The present invention relates to a power supply device for a cordless telephone base set. The device comprises a rectifying and filtering circuit for managing power supply via a power management device. The rectifying and filtering circuit is provided with a plurality of state power supply converters and the power management device, wherein the state power supply converters are used for converting the subscriber line power feed of an exchanger to low-voltage power supply and supplying the low-voltage power supply to the base set; the power management device is connected with the output ends of the state power supply converters and is used for controlling the work of the state power supply converters. The state power supply converters convert tiny power energy obtained from the exchanger to the low-voltage power supply to supply a receiver to intermittently work in an energy storage way, and convert ringing energy to the low-voltage power supply to supply a transmitter to work so as to realize the cordless telephone base set without external power supply and bring great convenience to users.
Description
The present invention relates to a kind of power supply for wireless PBX device, particularly, relate to a kind ofly by means of switch, supply convertor obtains the small electric energy of telephone exchange user line and is converted to the power supply for wireless PBX device that the low pressure accumulate can be powered.
The supply unit of existing cordless fixed part, or adopt external power supply after rectification, to power to base, or power to base by internal cell.In the past, the typical circuit of cordless fixed part constituted, as shown in Figure 5, comprise: the partiting dc capacitor CO that convertor user line is connected with ring detecting circuit, and separate the K switch that is connected, this ring detecting circuit with alternating current-direct current, be used for according to the convertor user line ring output bell signal; Microprocessing unit (CPU) according to the operating state of base, such as from the bell signal of above-mentioned ring detecting circuit output etc., carries out power management, and the work of control transmitter and receiver; The alternating current-direct current separator is used to separate the AC/DC signal and output AC signal and the signal of accepting transmitter; Exchange two/four line transducers, be used for the AC signal from above-mentioned alternating current-direct current separator output is converted to four line signals, the one tunnel delivers to transmitter, and receiver is delivered on another road; And duplexer, the signal of receiver transmitter or receiver carries out radio transmitting.External power source or internal cell are by electric power controller, as required to CPU, transmitter and receiver supply power.This cordless telephone before off-hook, detects by ring, and bolt is looked into whether ring of convertor user line, and by CPU control power supply and receiver, checks to have or not handset call.The used electric energy of receiver is supplied with by power supply.After the K switch closure, when being in off hook state, partly set up the loop of convertor user line feed by dc loop circuit, electric energy becomes thermosetting and exhales.The output of dc loop circuit converts four lines through the ac/dc separator to by exchanging two, four line transducers, and one the tunnel receives and sends device, and another road connects receiver, thereby finishes the sending and receiving task behind the off-hook.When this cordless fixed part is not only installed, need external power supply, cause inconvenience, and, this part of cordless telephone when having a power failure, can not be used.In addition, even base uses internal cell to carry out work,, also can bring inconvenience because of often needing to change battery.
The present invention just develops the present invention in view of the shortcoming of above-mentioned cordless fixed part, and its objective is provides a kind of power supply for wireless PBX device, brings the convenience of installing and using for the cordless telephone user.
In order to realize above-mentioned goal of the invention.According to power supply for wireless PBX device of the present invention, comprise: convertor user line and electric power controller, also possessing has: a holding state power supply changeover device, the input of described holding state power supply changeover device is connected with described convertor user line, and its output is connected with the receiver of described electric power controller and described base; A bell signal power supply changeover device, the input of described bell signal power supply changeover device is connected with described convertor user line via partiting dc capacitor, and its output is connected with the transmitter of described base; And an off hook state power supply changeover device, the input of described off hook state power supply changeover device is connected with described convertor user line, and its output is connected with transmitter, receiver and the described electric power controller of described base.
Owing in power supply for wireless PBX device of the present invention, be provided with switching power converters, by means of this switching power converters.Obtain the small electric energy of base convertor user line and be converted to low-voltage electric energy, store up electric energy, make the receiver discontinuous operation in the energy storage mode.Utilize switching power converters to obtain the ring electric energy and be converted to low-voltage electric energy, supply with transmitter work.Utilize switching power converters to obtain the ring electric energy and be converted to low-voltage electric energy, supply with transmitter work, therefore realized the cordless telephone base of dispense with outer connecting power or internal cell, bring the great convenience of installing and using to the user.
Should be understood that above-mentioned generality is described and following detailed description all is exemplary with indicative, should not think that the present invention is subject to this.In addition, above-mentioned purpose, characteristics and advantage with other of the present invention in conjunction with each accompanying drawing, by following detailed description, will become and put Chu in order, wherein:
Fig. 1 is the circuit structure block diagram of the power unit of cordless fixed part and base of the present invention;
Fig. 2 is the circuit structure diagram of the power supply for wireless PBX of expression one embodiment of the present of invention;
Fig. 3 is the circuit structure diagram of the power supply for wireless PBX of expression an alternative embodiment of the invention;
Fig. 4 is the circuit structure diagram of the Switching Power Supply in the expression power supply for wireless PBX of the present invention;
Fig. 5 is the circuit structure block diagram of the existing cordless fixed part of expression.
Below, with reference to each accompanying drawing, describe the circuit structure of power supply for wireless PBX device of the present invention in detail.
Fig. 1 is the integrated circuit structured flowchart of cordless fixed part and the present dynamo-electric source of cordless telephone of the present invention part.According to cordless fixed part of the present invention and power supply thereof, include the partiting dc capacitor CO that convertor user line is connected with ring detecting circuit, and the K switch that is connected with the alternating current-direct current separator, should have: ring detecting circuit, being used for shaking according to convertor user line makes signal, the output bell signal; Microprocessing unit (CPU), the bell signal according to from above-mentioned dc detection circuit output carries out power management, and the work of control transmitter and receiver; The AC and DC separator is used to separate interchange, direct current signal and output AC signal and accept the signal of transmitter; Exchange two/four line transducers, be used for the AC signal from above-mentioned alternating current-direct current separator output is converted to four line signals, the one tunnel delivers to transmitter, and receiver is delivered on another road; And duplexer, the signal of receiver transmitter or receiver carries out in the cordless fixed part of radio transmitting, also possessing has: the holding state power supply changeover device, and the operating current that is used for the holding state power supply is converted to the operating current that supplies receiving unit discontinuous operation and microprocessing unit (CPU); The bell signal power supply changeover device, the bell signal current conversion that is used for convertor user line is come divides work to send ring to mobile phone for supplying with sending part; And the off hook state transfer switch, be used for direct current that above-mentioned alternating current-direct current separator is separated, after power source conversion, supply with the operating current of transmitter, receiver and CPU.
Thereby, the existing cordless fixed part of this Fig. 1 and Fig. 5 more as can be seen, except that power unit, remainder is all identical with existing mode.Base power supply of the present invention is supplied with by the convertor user line feed, according to the different operating state of Telephone set, adopts different power supply changeover devices, or power supply changeover device is worked under different conditions.Then, carry out work by CPU control each several part power supply.Therefore the following describes the operating state of power source conversion part.
Under holding state, if during no ring, take out energy by the convertor user line feed, after switch power converter is changed, become low-tension supply, to accumulator, for example, after capacitor charges, for the receiver discontinuous operation, with detection of handset off-hook whether, simultaneously, also provide operating current to CPU.In addition, if convertor user line allows, can also there be sufficient electric energy to charge to mobile phone.When if ring is arranged, after then the electric energy of bell signal is changed by power supply changeover device, become low-tension supply, control by CPU, deliver to transmitter by power supervisor, and bell signal is sent (at this moment, standby power can not worked), supply with receiver power supply simultaneously, have or not the mobile phone echo with detection.
Under off hook state, when K switch is connected,, the direct current after separating is converted to low-tension supply (also can without changing) by the AC and DC separator, deliver to parts such as transmitter, receiver and CPU, make its operate as normal.
Below, carry out brief description with regard to the operation principle of power unit.Because obtainable electric energy size is different with voltage under above-mentioned three kinds of states, holding state is 40～57v, ringing condition 57～150v, and off hook state be so that 3～15v transition status is also different, therefore use three power supply changeover devices to finish respectively, yet an also available power supply changeover device is finished by three kinds of different operating states of CPU control.But, the power supply 40～57v of holding state, the conversion of the power supply 57～150v of ringing condition then must use the Switching Power Supply mode to finish.
The physical circuit figure of Fig. 2 is the circuit structure of the power supply for wireless PBX of one embodiment of the present of invention.In Fig. 2, A, B terminate switched machine subscribers feeder, that is, and ordinary telephone line.The inner rectifier bridge D1 that connects of A, B end, this rectifier bridge D1 exports an end and is connected to K switch 1.The other end of this K switch 1 is connected to the negative pole of inductance L 1 and voltage stabilizing didoe D6.The plus earth of this voltage stabilizing didoe D6.The node v2 of inductance L 1 connects electric capacity to ground.The above-mentioned output of rectifier bridge D1 is gone back the input of series resistor R and Switching Power Supply S1, and the node of resistance R and Switching Power Supply S1 is via capacitor C 6 ground connection.Diode D4 is connected between the node v1 of node v2 and Switching Power Supply S1 output.Receiving unit M1, CPU are connected to node v1 mutually with capacitor C 4.The other end ground connection of rectifier bridge D1, capacitor C 6, Switching Power Supply S1, capacitor C 4, receiving unit M1 and CPU.
A, B hold internal connection line, also are connected to rectifier bridge D2 by capacitor C 1, C2, and an end of this rectifier bridge D2 output is connected to the negative pole of voltage stabilizing didoe D3.The positive pole of this voltage stabilizing didoe D3 is connected to Switching Power Supply S2 input and capacitor C 7, and Switching Power Supply S2 is connected in node v3 with transmission part M2, diode D5 and capacitor C 5.The other end ground connection of rectifier bridge D2, capacitor C 7, Switching Power Supply S2, capacitor C 5 and Switching Power Supply M2.The output of the positive pole of node v2, diode D5 and voltage regulator M3 links together, and the other end ground connection of voltage regulator M3.Also have, here, inductance and electric capacity are the simplest AC/DC separators, certainly, and also can be, and use electronic inductance without inductance and electric capacity, or form such as transformer.
Below, the operation principle of cordless telephone of the present invention is described.When K switch 1 closure, be off hook state.When mobile phone is not called out base, and base is when being ready, and K switch 1 disconnects, the electric current that Switching Power Supply S1 utilizes feed voltage on A, the B end line and GB (national standard) to allow.Node V1 is received in the output of Switching Power Supply S1.Capacitor C 4 plays filtering and two kinds of effects of energy storage, through certain hour, for example 0.5～1 second, arrive and make the receiver part can operate as normal the time when energy runs up to the voltage of node V1 and energy gradually, CPU opens receiver M1 part by control, and whether scanning cell phone calls out base.The voltage of node V1 changes, but does not influence the work of CPU and receiver.Then do not continue to wait for if having to call out, and the accumulation electric energy prepares to receive scanning next time.If calling is arranged, then by CPU control switch K1 closure, convertor user line voltage is delivered to receiver part M1 and transmitter part M2 by diode D4 and D5, and divides work by CPU controlling receiver part and transceiver portion.It is according to the distance of cordless fixed part and switch and the thickness situation of transmission line that voltage regulator is regulated M3, regulates the dc loop circuit electric current, makes the DC characteristic of its A, B line, promptly regulates node V2 voltage, makes the complete machine dc point all meet national standard.Behind the end of conversation, K switch 1 is disconnected.
When base etc. is bide one's time, if A, the ring of B line, the AC signal of ring then, by capacitor C1 and C2, rectifier bridge D2, voltage-stabiliser tube diode D3, Switching Power Supply S2, deliver to transmitter part M2, after CPU detects bell signal, open transmitter M2 part, make its work, and with bell signal with deliver to mobile phone for information about.Receiver part M1 then monitoring cell-phone has reactionlessly, and henbane has been received the mobile phone answer signal, then makes K switch 1 closure, and A, B line form closed dc loop circuit, after switch has received loop signals, turn-offs A, the B line stops ring.So utilize the feed of A, B line to make the base operate as normal.On the contrary, its recovery is same as above, no longer describes.
If during the ring, the mobile phone no response, after then ring finishes, will the recovery operation state.
The physical circuit figure of Fig. 3 is the circuit structure of the power supply for wireless PBX of an alternative embodiment of the invention.More as can be seen, the main distinction is to have saved Switching Power Supply S2,, has only a Switching Power Supply S1 that is by Fig. 3 and Fig. 2.In Fig. 3, A, B end interior lines are connected to rectifier bridge D1, and an end of this rectifier bridge D1 output is connected to K switch 1.The other end of this K switch 1 is connected to inductance L 1.The above-mentioned output of rectifier bridge D1 is series resistor R and Switching Power Supply S1 also, and the node of resistance R and Switching Power Supply S1 and voltage stabilizing didoe D3 and CPU are connected in node v5, via capacitor C 3 ground connection.Input and the K switch 2 of the input of Switching Power Supply S1 output, receiving unit M1, the input of CPU, voltage regulator M3 all are connected in node v4, and by capacitor C 4 ground connection.The other end ground connection of rectifier bridge D1, Switching Power Supply S1, receiving unit M1 and CPU.A, B end interior lines also connect rectifier bridge D2 by capacitor C 1, C2, and an end of this rectifier bridge D2 output is connected to the negative pole of voltage stabilizing didoe D3.The positive pole of this voltage stabilizing didoe D3 is connected with the input of CPU.The output of this CPU is connected with the input of Switching Power Supply S1.The other end ground connection of rectifier bridge D2.The input that sends part M2 is connected with K switch 2.
When CPU detected bell signal, then control switching S1 increased transformation energy, and simultaneously, control switch K2 opens transmitter part M2, sent bell signal to mobile phone.
Fig. 4 is the circuit structure diagram of the example of the relevant Switching Power Supply in the expression power supply for wireless PBX of the present invention.The example of this Switching Power Supply can be used as the Switching Power Supply S1 shown in Fig. 1～3, S2 and S3 etc.This switch power supply route transistor T, controller KZ, voltage stabilizing didoe D, energy storage inductor L and filtering
Device C forms.The collector electrode of transistor T is accepted input voltage V as input
IN, controller KZ
Between the base stage and ground of transistor T.The emitter of this transistor T with by voltage stabilizing didoe D,
L is connected with the filter circuit that capacitor C constitutes, and the positive pole of this diode D and capacitor C
End ground connection.The control end of controller KZ is connected with the node of inductance L with capacitor C, and should
As the low-voltage output, output supply power voltage V
OUTAbove-mentioned transistor T can be a triode,
With field-effect transistors, such as the VMOS pipe, or other switch elements etc.Because transistor T need carry out the energy storage discontinuous operation sometimes under the weak current that the switch feed is supplied with, so this transistor should be able to carry out work under the operating current below the nanoampere.Controller KZ must be little power consumption, so that when operate as normal, satisfies the requirement of telecommunication department.
Because in the supply unit of cordless fixed part of the present invention, be provided with switching power converters, obtain the small electric energy that telephone wire sends here and be converted to low-voltage electric energy by means of this switching power converters, store up energy, make the receiver discontinuous operation in the energy storage mode.Utilize switching power converters to obtain the ring electric energy and be converted to low-voltage electric energy, supply with transmitter work, therefore realized the cordless telephone base of dispense with outer connecting power or internal cell, bring convenience to the user.
Obviously, above-mentioned power supply for wireless PBX device of the present invention, equally also be applicable to behind the digitization of speech signals the digital cordless fixed part that receives, sends, and based on other phone type terminal equipments such as the radio facsimile machine of cordless fixed part, wireless Modems.Equally, can realize the cordless fixed part of dispense with outer connecting power or internal cell, bring convenience to the user.
Above, describe the present invention in detail by each embodiment, but should not think that the present invention only only limits to the above embodiments, for example, can be Switching Power Supply S1, S2, S3, even K switch 1 and power regulator M3 also merged and formed as a wholely, also is feasible by unified the managing of CPU.Those of ordinary skill in the art is clear, also can make various improvement and change and can not break away from design of the present invention or scope the present invention.Therefore, this means that the present invention should comprise the various improvement and the change of this invention, and as long as this improvement and change are in the appended claims and the equivalent scope thereof.
Claims (7)
1, a kind of power supply for wireless PBX device comprises: convertor user line and electric power controller is characterized in that possessing and have:
A holding state power supply changeover device, the input of described holding state power supply changeover device is connected with described convertor user line, and its output is connected with the receiver of described electric power controller and described base;
A bell signal power supply changeover device, the input of described bell signal power supply changeover device is connected with described convertor user line via partiting dc capacitor, and its output is connected with the transmitter of described base; And
An off hook state power supply changeover device, the input of described off hook state power supply changeover device is connected with described convertor user line, and its output is connected with transmitter, receiver and the described electric power controller of described base.
2, power supply for wireless PBX device according to claim 1 is characterized in that, described holding state and bell signal state power supply changeover device are to be connected and composed by rectifier bridge, filter circuit and Switching Power Supply successively; Described off hook state power supply changeover device is to be connected and composed by rectifier bridge, off-hook switch and inductor filter circuit.
3, power supply for wireless PBX device according to claim 1, it is characterized in that, described standby shape be successively attitude by rectifier bridge, Switching Power Supply and filter circuit connect and compose with bell signal state power supply changeover device be that rectifier bridge and filter circuit connect and compose; Described off hook state power supply changeover device is to be connected and composed by rectifier bridge, off-hook switch and inductance.
4, power supply for wireless PBX device according to claim 2, it is characterized in that, between the output of the output of described off hook state power supply changeover device and described holding state and described bell signal state power supply changeover device, forward-biased diode is set respectively is connected.
5, according to claim 2,3 or 4 described power supply for wireless PBX devices, it is characterized in that, described Switching Power Supply constitutes: transistorized current collection is input very, base stage is linked controller ground connection, emitter is connected with filter circuit, and the control end of controller is connected to the voltage output end of filter circuit.
6, according to claim 1,2,3 or 4 described power supply for wireless PBX devices, it is characterized in that described electric power controller is a microprocessing unit, described microprocessing unit also is connected with the output of described ringing condition power supply changeover device.
7, according to each described power supply for wireless PBX device of claim 1～4, it is characterized in that the output of described off hook state power supply changeover device is provided with voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121800A CN1070015C (en) | 1997-07-25 | 1997-12-24 | Power supply for wireless PBX |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115157.1 | 1997-07-25 | ||
| CN97115157 | 1997-07-25 | ||
| CN97121800A CN1070015C (en) | 1997-07-25 | 1997-12-24 | Power supply for wireless PBX |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1192639A CN1192639A (en) | 1998-09-09 |
| CN1070015C true CN1070015C (en) | 2001-08-22 |
Family
ID=25744354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97121800A Expired - Fee Related CN1070015C (en) | 1997-07-25 | 1997-12-24 | Power supply for wireless PBX |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1070015C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1071292A (en) * | 1991-09-16 | 1993-04-21 | 莫托罗拉公司 | Wireless telephonic electricity-saving appliance |
| CN2202380Y (en) * | 1994-03-12 | 1995-06-28 | 武汉市联青电气有限公司 | Emergency supply for wireless telephone |
-
1997
- 1997-12-24 CN CN97121800A patent/CN1070015C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1071292A (en) * | 1991-09-16 | 1993-04-21 | 莫托罗拉公司 | Wireless telephonic electricity-saving appliance |
| CN2202380Y (en) * | 1994-03-12 | 1995-06-28 | 武汉市联青电气有限公司 | Emergency supply for wireless telephone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1192639A (en) | 1998-09-09 |
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