CN100433549C - Apparatus and method for realizing linear switch power amplifying - Google Patents
Apparatus and method for realizing linear switch power amplifying Download PDFInfo
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- CN100433549C CN100433549C CNB031566057A CN03156605A CN100433549C CN 100433549 C CN100433549 C CN 100433549C CN B031566057 A CNB031566057 A CN B031566057A CN 03156605 A CN03156605 A CN 03156605A CN 100433549 C CN100433549 C CN 100433549C
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Abstract
The present invention relates to an apparatus and a method for realizing power amplification of a linear switch, particularly to a device and a method for realizing the power amplification of the linear switch to a PHS base station signal on the basis of a TDD operating mode. The present invention carries out power management to a linear power amplifier, and an electric power management circuit is composed of two paths of controlling triode transistors and a current switch tube for controlling the linear power amplifier. The switching of the controlling triode transistors is controlled by TTL electrical level coming from a baseband plate, and the TTL electrical level is output to the current switch tube to further control the switching of a power supply of the linear power amplifier. Because the present invention uses a power management mode for the power supply of the linear power amplifier, when a system works in a receiving state, the work of the linear power amplifier is stopped, and therefore, the linear power amplifier can not generate spurious signals. Consequently, the requirement of sending and receiving isolation is lowered, the design of the system is easy, the cost of the system can be reduced, and the difficulties on the aspect of the system design caused by the problems are solved.
Description
Technical field
The invention belongs to field of mobile communication, relate to a kind of device and method of realizing the linear switch power amplification, particularly a kind of based on the TDD working method, realize the device and method that the PHS base station signal is carried out the linear switch power amplification.
Background technology
The importance of Microwave Linear power amplifier in modern microwave telecommunication system is increasing.Particularly in the mobile communication system of digital communication system, the linear power amplifier vitals that has been absolutely necessary.The multiple system coexistence of mobile communication now, New System continues to bring out, and is more and more higher to the requirement of power amplifier, and this just makes troubles to developer and user.
The major function of power amplifier is that the small-signal with prime carries out power amplification, makes transmit power output not only can satisfy the requirement of communication system, and produced simultaneously distortion is also enough little, so that do not change the spectral shape of modulation signal.Therefore require the whole passage of posting a letter to keep strict linearity, do not allow Non-Linear Distortion Factor and exist.As the power amplifier of the channel end of posting a letter, to use linear good class A amplifier usually.Because the operating efficiency of class A power amplifier is very low, the power consumption of power amplifier is very big, and most of power consumption is used for producing heat, makes the heat radiation of power amplifier become problem again.
And in system in the past, the power supply of Linear Power Amplifier is not closed when the receiving slot of system, just the radiofrequency signal of emission is closed, and like this because the gain of power amplifier is very high, spurious signal will influence the received signal of system when reception.For avoiding this phenomenon, just require system when design, better isolation to be arranged, the system design difficulty is increased.
Summary of the invention
The purpose of this invention is to provide a kind of device and method of realizing the linear switch power amplification.By Linear Power Amplifier is carried out power management, make Linear Power Amplifier under the TDD working method, improve the isolation of transceiver channel, and significantly reduce the power consumption of system.
Realize the power amplification function with linear switch function of the present invention, can not only make power amplifier satisfy the requirement of system, main is is satisfying on the basis that system index requires, and Designing power amplifier is become switching regulator, is fit to the system under the TDD operational environment.
The present invention not only can use in the PHS system, also can be used widely in the communication system of other TDD work.
The function of power amplifier mainly is that signal is carried out linear amplification, and work is real-time.Because the electric current of power amplifier work is very big, power consumption is bigger, therefore just the heat radiation of system and the structure of power amplifier has been proposed very high requirement.And the present invention carries out power management on the basis of Linear Power Amplifier, makes Linear Power Amplifier in the system of tdd mode work, and when system works during in accepting state, Linear Power Amplifier quits work, thereby can reduce the power consumption of system.
The device and method of the linear switch power amplification that the present invention realized, at the PHS system design, the mode of operation of PHS system is the TDD working method, is the far-end supply power mode because system adopts at present, to the requirement of the power consumption of system than higher.Therefore the Linear Power Amplifier in the system adopts the switch working forms under the prerequisite that satisfies the system linear index, thereby greatly reduces the power consumption of system, and can improve the isolation of transmitting-receiving in system's real work.
The present invention is achieved in that
A kind of device of realizing the linear switch power amplification comprises:
Linear power amplifier is used for radiofrequency signal is carried out linear amplification, makes modulated radiofrequency signal reach the level requirement of system after amplifying;
Radio-frequency (RF) switch is used for finishing the conversion of transmitting-receiving path according to the needs of system when the transmitting-receiving time slot;
It is characterized in that also comprising:
Electric power management circuit is used for the power supply of supplying with Linear Power Amplifier is carried out real-time switch management, makes Linear Power Amplifier carry out work with the transmitting-receiving time slot of system, when receiving slot, the power supply of Linear Power Amplifier is closed, reduce the power consumption of system, increase the receive-transmit isolation of system simultaneously.
The current switch pipe that described electric power management circuit is controlled linear amplifier power supply by two-way triode, a tunnel is formed;
The break-make of described triode is controlled by the Transistor-Transistor Logic level from baseband board, its corresponding current switch pipe that exports to, the switch of the output control amplifier power supply of current switch pipe.
Described two-way triode receives opposite from the logic of baseband board Transistor-Transistor Logic level, and the height of each road Transistor-Transistor Logic level is controlled the break-make of one road triode, and again by resistance output, Control current switching tube source class is to the conducting of leaking level or end.
Described triode is MMBT4401;
Described current switch pipe is SI9934DY.
A kind of method that is applied to the linear switch power amplification of claim 1 device comprises the steps:
Step 1, the input radio frequency switch controlling signal makes radio-frequency (RF) switch be in the state of posting a letter;
Step 2 makes the current switch pipe of electric power management circuit be in conducting state, and Linear Power Amplifier begins to power on;
Step 3, Linear Power Amplifier are finished normal enlarging function, and finish radiofrequency signal output;
Step 4 is turn-offed radio-frequency input signals, switches radio-frequency (RF) switch simultaneously and makes it be in the collection of letters or off state;
Step 5 is cut off the Linear Power Amplifier power supply, finishes the shutoff of Linear Power Amplifier.
In the described step 1: make that radio-frequency (RF) switch is in the operating state of posting a letter in the system, further comprise following process:
By baseband circuit according to the system sequence requirement, the input radio frequency switch controlling signal, the radio-frequency (RF) switch completion status is switched under the effect of this control signal, the path conducting of posting a letter, signalling channel is in the state of posting a letter.
In the described step 2: make the current switch pipe of electric power management circuit in the system be in conducting state, Linear Power Amplifier begins to power on, and further comprises following process:
By baseband circuit according to the system sequence requirement, import the triode that controls signal to of electric power management circuit, its corresponding current switch pipe that exports to makes the current switch pipe be in conducting state, this moment, power supply was added to the amplifier power supply end by the current switch pipe, and Linear Power Amplifier begins to power on.
In the described step 3: make system's neutral line power amplifier finish normal enlarging function, and finish radiofrequency signal output, further comprise following process:
When Linear Power Amplifier finish power on transient process and be in steady-working state after, the input radio frequency signal, Linear Power Amplifier was in steady-working state and can finishes normal enlarging function this moment, the radiofrequency signal after the amplification is exported by radio-frequency (RF) switch.
In the described step 4: make system turn-off radio-frequency input signals, switch radio-frequency (RF) switch simultaneously and make it be in the collection of letters or the off state of posting a letter, further comprise following process:
Turn-off the radio-frequency input signals of power amplifier, the base band control circuit is according to system requirements output radio-frequency (RF) switch control signal, and radio-frequency (RF) switch is switched under the control of this signal, and the conversion of the state of finishing the work is in radio-frequency (RF) switch and collects mail or off state.
In the described step 5: cut off the Linear Power Amplifier power supply, finish the shutoff of Linear Power Amplifier, further comprise following process:
The base band control circuit makes the current switch pipe in the electric power management circuit be in off state according to the control signal of system requirements out-put supply management circuit, cuts off the turn-off function that amplifier power supply is finished power amplifier.
Adopt the present invention, overcome in the existing TDD communication system the transmitting-receiving isolation of system, the power supply and the demanding shortcoming of power consumption of system.Owing to the power supply of Linear Power Amplifier has been adopted the mode of power management, when system works during in accepting state, power amplifier quits work, power amplifier does not produce spurious signal, thereby reduced the requirement that transmitting-receiving is isolated, make the design of system be more prone to, can reduce system cost, solve because the difficulty of the system design aspect that the problems referred to above cause.The present invention is applicable to the system of other TDD working method.
Description of drawings
Fig. 1 is the theory diagram of device of the present invention;
Fig. 2 is the theory diagram of electric power management circuit in the device of the present invention;
Fig. 3 is the Linear Power Amplifier of device of the present invention and the connection diagram between electric power management circuit and the radio-frequency (RF) switch;
Fig. 4 is a specific embodiment of electric power management circuit in the device of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing:
Accompanying drawing 1 is the theory diagram of device of the present invention.
[101] are the driving stages of linear switch power amplifier among the figure, mainly are that radiofrequency signal is carried out primary amplification and driven.[103] be linear main power amplifier, make radiofrequency signal satisfy the requirement of system.[102] being the power management part of linear switch power amplifier, is that power supply control is carried out in main power amplification, makes power amplifier be operated on off state.[104] being the radio-frequency (RF) switch of the radio frequency output of power amplifier, mainly is to carry out the emission of power amplifier and the switching that LNA receives, and belongs to appendage of the present invention.[105] be the output of radiofrequency signal.[106] be the reception path when radio-frequency (RF) switch switches to accepting state.
Fig. 2 is the theory diagram of electric power management circuit in the device of the present invention.
By the break-make of next signal [204] the control triode [205] of base band, when triode [205] conducting, the current switch [202] of control amplifier power supply will be opened simultaneously, gives power amplifier [203] with supply voltage [201] by the switch of opening [202].
When system works when posting a letter state, baseband portion out-put supply supervisory control signals and radio-frequency (RF) switch control signal, under the control of amplifier power supply supervisory signal, the amplifier power supply management circuit powers on power amplifier, the radio-frequency receiving-transmitting switch switching of state of under the effect of radio-frequency (RF) switch control signal, finishing the work simultaneously, make it be operated in the state of posting a letter, after making power amplifier and radio-frequency (RF) switch set up stable operating state after a while, the radiofrequency signal that is exaggerated by radiofrequency signal input circuit input, this moment, power amplifier can be finished normal enlarging function, and the radiofrequency signal after the amplification is exported by radio-frequency (RF) switch.
When system finishes the function of posting a letter and will switch to information receiving state, the radio frequency input circuit turn-offs radio-frequency input signals, baseband portion out-put supply supervisory control signals and radio-frequency (RF) switch control signal, under the control of amplifier power supply supervisory signal, amplifier power supply management circuit power cutoff, the radio-frequency receiving-transmitting switch switching of state of finishing the work under the effect of radio-frequency (RF) switch control signal simultaneously makes the radio-frequency receiving-transmitting switch be in information receiving state.
Fig. 3 is the Linear Power Amplifier of device of the present invention and the connection diagram between electric power management circuit and the radio-frequency (RF) switch.
, after [Linear Power Amplifier] amplifies, send into antenna through [radio-frequency (RF) switch] control and launch by the radiofrequency signal RFin that preceding brings in.In the course of the work, [power management] and [radio-frequency (RF) switch] synchronous working.When module (in the present invention, described module is meant that Linear Power Amplifier and LNA receive the general designation that lumps together) when being operated in transmission time slot, [power management] opens the power supply of [Linear Power Amplifier], [Linear Power Amplifier] work, [radio-frequency (RF) switch] is operated in emission state simultaneously, will finish the amplification transmission work of radiofrequency signal like this.When module is operated in receiving slot, [power management] will close the power supply of [Linear Power Amplifier], reach the purpose of system saving electricity, and will increase the isolation of transmitting-receiving greatly.Simultaneously, [radio-frequency (RF) switch] is operated in accepting state.
Fig. 4 is a specific embodiment of electric power management circuit in the device of the present invention.
Because the electric current during the power tube normal and continuous operation is 1.25A, so require the current switch pipe of control power amplifier to satisfy big current work requirement, SI9934DY among the last figure is the high-current switch pipe, the electric current of running hours is 4A, can pass through electric current 20A during pulsed operation, satisfy the design's requirement fully.
The power amplifier switch working method: 1 passage with SI9934DY is that S1 is an example to the D1 passage, the break-make of the Transistor-Transistor Logic level TSW control triode MMBT4401 VT201 that send from baseband board.When the MMBT4401VT201 conducting, then there is electric current to pass through on R214, the R215, at this moment the voltage on the R214 is reduced to 4VDC, both Vgs was-4VDC, this moment, SI9934DY opened, have electric current to flow to a leakage level D1 by the source class S1 of SI9934DY, this moment, the output voltage of PA_SUPPLY end was S1 input voltage 10VDC, made Linear Power Amplifier be in normal magnifying state.MMBT4401 ends when TSW is low level, does not have electric current on R214, the R215, and then VGS is 0VDC.The not conducting of S1-D1 of SI9934DY, both power tube did not have electric current to realize the turn-off function of main power amplifier, therefore by the variation of TSW signal high-low level, had realized the switching function of amplifier power supply.The SI9934DY 2 passage S2-D2 operation principles of RSW control are basic identical therewith, and just control signal LNAC is opposite with the Transistor-Transistor Logic level RSW logic of sending from baseband board.
Compared with former traditional power amplifier design method and to have following characteristics:
The present invention has been owing to realized power management function at circuit to power amplifier, compared with prior art, when Power amplifier is used in the system of tdd mode work, and at this moment, power amplifier quits work when accepting state, The power amplifier operating current reduces greatly, thereby can reduce the power consumption of system, and then further simplifies merit The thermal design of putting and the design difficulty of power unit, and the power amplifier of real-time working is because the electric current of work Very big, power consumption is very big, and the heat radiation of system and the structure of power amplifier are just had higher requirement.
For the system of TDD work, when system works during in accepting state, power amplifier quits work, merit Put itself and not only do not produce spurious signal, and can advance the spurious signal of posting a letter of power amplifier input The decay that row is certain, thus the isolation that transmits and receives can greatly be increased, and because itself The power acquisition of the Linear Power Amplifier mode of power management, so that in the design of system, emission part The Linear Power Amplifier that divides and the LNA of receiving unit can design on same veneer, so that system Design be more prone to.
And the power supply of the Linear Power Amplifier in the system was not carry out closing when the receiving slot of system in the past , just the radiofrequency signal of emission is closed, like this because the gain of power amplifier is very high, for The spurious signal of avoiding posting a letter affects the reception signal of system when collecting mail. So just require system establishing Timing has better isolation, so that the design of system is comparatively complicated.
In a word, adopt device and method provided by the invention, system is consisted of simplify technology Difficulty reduces, and the R﹠D cycle shortens, and the development and production cost also can significantly reduce the production worker Skill standard, simple is conducive to large-scale mass production.
Claims (7)
1, a kind of device of realizing the linear switch power amplification comprises:
Linear power amplifier is used for radiofrequency signal is carried out linear amplification, makes modulated radiofrequency signal reach the level requirement of system after amplifying;
Radio-frequency (RF) switch is used for finishing the conversion of transmitting-receiving path according to the needs of system when the transmitting-receiving time slot;
It is characterized in that also comprising:
Electric power management circuit, be used for the power supply of supplying with linear power amplifier is carried out real-time switch management, make linear power amplifier carry out work with the transmitting-receiving time slot of system, when receiving slot, the power supply of linear power amplifier is closed, the power consumption of minimizing system increases the receive-transmit isolation of system simultaneously;
Wherein said electric power management circuit is made up of the current switch pipe of two-way triode, one tunnel control linear power amplifier power supply;
The break-make of described triode is by the Transistor-Transistor Logic level control from baseband board, its corresponding current switch pipe that exports to, the switch of the output control line power amplifier power supply of current switch pipe.
2, realize the device of linear switch power amplification according to claim 1, it is characterized in that:
Described two-way triode receives opposite from the logic of baseband board Transistor-Transistor Logic level, and the height of each road Transistor-Transistor Logic level is controlled the break-make of one road triode, and again by resistance output, Control current switching tube source class is to the conducting of leaking level or end.
3, realize the device of linear switch power amplification according to claim 1, it is characterized in that:
Described triode is MMBT4401;
Described current switch pipe is SI9934DY.
4, a kind of method that is applied to the linear switch power amplification of claim 1 device comprises the steps:
Step 1, the input radio frequency switch controlling signal makes radio-frequency (RF) switch be in the state of posting a letter;
Step 2 makes the current switch pipe of electric power management circuit be in conducting state, and linear power amplifier begins to power on;
Step 3, linear power amplifier are finished normal enlarging function, and finish radiofrequency signal output;
Step 4 is turn-offed radio-frequency input signals, switches radio-frequency (RF) switch simultaneously and makes it be in the collection of letters or off state;
Step 5 is cut off linear power amplifier power supply, finishes the shutoff of linear power amplifier;
Further comprise following process in the wherein said step 1: by baseband circuit according to the system sequence requirement, the input radio frequency switch controlling signal, the radio-frequency (RF) switch completion status is switched under the effect of this control signal, the path conducting of posting a letter, and signalling channel is in the state of posting a letter;
In the wherein said step 2: make the current switch pipe of electric power management circuit in the system be in conducting state, linear power amplifier begins to power on, further comprise following process: by baseband circuit according to the system sequence requirement, import the triode that controls signal to of electric power management circuit, its corresponding current switch pipe that exports to, make the current switch pipe be in conducting state, this moment, power supply was added to the linear power amplifier power supply end by the current switch pipe, and linear power amplifier begins to power on.
5, as the method for realization linear switch power amplification as described in the claim 4, it is characterized in that:
In the described step 3: make system's neutral line power amplifier finish normal enlarging function, and finish radiofrequency signal output, further comprise following process:
When linear power amplifier finish power on transient process and be in steady-working state after, the input radio frequency signal, linear power amplifier was in steady-working state and can finishes normal enlarging function this moment, the radiofrequency signal after the amplification is exported by radio-frequency (RF) switch.
6, as the method for realization linear switch power amplification as described in the claim 4, it is characterized in that:
In the described step 4: make system turn-off radio-frequency input signals, switch radio-frequency (RF) switch simultaneously and make it be in the collection of letters or the off state of posting a letter, further comprise following process:
Turn-off the radio-frequency input signals of linear power amplifier, the base band control circuit is according to system requirements output radio-frequency (RF) switch control signal, radio-frequency (RF) switch is switched under the control of this signal, and the conversion of the state of finishing the work is in radio-frequency (RF) switch and collects mail or off state.
7, as the method for realization linear switch power amplification as described in the claim 4, it is characterized in that:
In the described step 5: cut off linear power amplifier power supply, finish the shutoff of linear power amplifier, further comprise following process:
The base band control circuit makes the current switch pipe in the electric power management circuit be in off state according to the control signal of system requirements out-put supply management circuit, cuts off the turn-off function that linear power amplifier power supply is finished linear power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031566057A CN100433549C (en) | 2003-09-05 | 2003-09-05 | Apparatus and method for realizing linear switch power amplifying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031566057A CN100433549C (en) | 2003-09-05 | 2003-09-05 | Apparatus and method for realizing linear switch power amplifying |
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| CN1592090A CN1592090A (en) | 2005-03-09 |
| CN100433549C true CN100433549C (en) | 2008-11-12 |
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| CNB031566057A Expired - Fee Related CN100433549C (en) | 2003-09-05 | 2003-09-05 | Apparatus and method for realizing linear switch power amplifying |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101500298B (en) * | 2008-02-01 | 2012-03-07 | 中兴通讯股份有限公司 | Method and apparatus for lowering power consumption of GSM base station |
| CN103236870A (en) * | 2013-04-16 | 2013-08-07 | 环旭电子股份有限公司 | High-isolation circuit with LNA (low-noise amplifier) and method for improving isolation |
| CN107689726A (en) * | 2016-08-04 | 2018-02-13 | 智瑞佳（苏州）半导体科技有限公司 | A kind of programmable power supply conversion chip |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3988675A (en) * | 1975-11-10 | 1976-10-26 | Motorola, Inc. | Transmit-receive switching circuit with audio muting |
| CN1268013A (en) * | 1999-03-17 | 2000-09-27 | 明碁电脑股份有限公司 | Signal transmission circuit for radio hand set |
| CN1321365A (en) * | 1998-08-07 | 2001-11-07 | 艾利森公司 | Radio devices including power amplifier control circuits with hardware lockouts |
-
2003
- 2003-09-05 CN CNB031566057A patent/CN100433549C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3988675A (en) * | 1975-11-10 | 1976-10-26 | Motorola, Inc. | Transmit-receive switching circuit with audio muting |
| CN1321365A (en) * | 1998-08-07 | 2001-11-07 | 艾利森公司 | Radio devices including power amplifier control circuits with hardware lockouts |
| CN1268013A (en) * | 1999-03-17 | 2000-09-27 | 明碁电脑股份有限公司 | Signal transmission circuit for radio hand set |
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| CN1592090A (en) | 2005-03-09 |
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