CN103384146B - The guard method of high-speed radio-frequency circuit and device - Google Patents
The guard method of high-speed radio-frequency circuit and device Download PDFInfo
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- CN103384146B CN103384146B CN201210138575.0A CN201210138575A CN103384146B CN 103384146 B CN103384146 B CN 103384146B CN 201210138575 A CN201210138575 A CN 201210138575A CN 103384146 B CN103384146 B CN 103384146B
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Abstract
The invention discloses guard method and the device of high-speed radio-frequency circuit.The method includes: detect the input power of instantaneous pulse signal, and described input power is converted into reference signal value；The deflection threshold value preset, when this reference signal value is more than described deflection threshold value, conducting connects the attenuation path of described pulse signal.Use the present invention; can be by devices such as peak detectors; the radiofrequency signal detected is converted to the signal of telecommunication of correspondence; and this signal of telecommunication is compared output with the threshold value preset; the signal of telecommunication of output controls the decline passage being connected with input pulse signal; make whole radio frequency link can have bigger decay when input pulse signal is excessive, thus reach the purpose protecting radio circuit to be not damaged by.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to guard method and the device of high-speed radio-frequency circuit.
Background technology
Along with the high speed development of communication technology, the technology that numeral combines with radio frequency is more and more applied to mobile communication
Technical field.DPD(DigitalPre-DistortiON, digital pre-distortion) applying of combining with radio-frequency technique of technology moving
The dynamic communications field is more and more extensive.Increasingly it is widely applied along with numeral DPD technology, for as system transmitting chain end
The requirement of the power amplifier of end is more and more higher, and particularly digital DPD technology is used in combination with high power amplifier, due to
The feature of digital display circuit, the requirement for the protection circuit of power amplifier is the strictest.
LDMOS(Laterally Diffused Metal Oxide Semiconductor, lateral diffused metal oxide
Quasiconductor) pipe be aim at radio-frequency (RF) power amplification amplifier tube design modified model N-channel MOS FET(Metal-Oxide-
Semiconductor Field-Effect Transistor, metal-oxide half field effect transistor), its feature be have higher saturated
Power, at present for the amplifier tube being most widely used in radio-frequency (RF) power amplification.Although LDMOS pipe has a higher saturation power, but such as
Fruit drives power excessive, beyond the saturation power scope of LDMOS pipe, the most easily causes LDMOS pipe to damage, and this damage is can not
Inverse.Owing to LDOMS pipe is most important core in power amplification system, so the damage of LDMOS pipe can cause whole system
Paralysis.So power amplifier protection circuit occupies highly important position in the entire system.
Due at present in power amplification system numeral DPD technology more and more used, and digital display circuit waited in configuration
Journey is easy to self and produces instantaneous big pulse signal, so the requirement for the radio frequency protection circuit of power amplifier is the tightest
Lattice, the most conventional power amplifier protection circuit, is mostly employing average or envelop detection apparatus carries out detection for radiofrequency signal, so
The low and high level exported by comparator afterwards controls the conducting state of the diode on radio frequency path, thus reaches to protect power amplifier
The effect of system.But this circuit is difficult to make control, and mistake reaction time of whole circuit for instantaneous pulse signal
Long, it is generally ms level the reaction time of circuit protection, so the protection effect that the technology that is extremely difficult in DPD power amplification system requires
Really.
Summary of the invention
Based on this, it is necessary to for the problems referred to above, it is provided that the guard method of a kind of high-speed radio-frequency circuit and device, it is possible to right
Quickly reaction is made in big pulse, thus preferably protects radio frequency link.
A kind of guard method of high-speed radio-frequency circuit, including:
Detect the input power of instantaneous pulse signal, described input power is converted into reference signal value；
When this reference signal value is more than the deflection threshold value preset, conducting connects the attenuation path of described pulse signal.
Correspondingly, the protection device of a kind of high-speed radio-frequency circuit, including:
Detection converting unit, for detecting the input power of instantaneous pulse signal, is converted into ginseng by described input power
Examine signal value；
The signal comparing unit being connected with described detection converting unit, for by described reference signal value and the deflection preset
Threshold value compares；
The decay onunit being connected with described signal comparing unit, leads to for turning on the decay connecting described pulse signal
Road.
Implement the present invention, have the advantages that
The radiofrequency signal detected can be converted to the signal of telecommunication of correspondence by devices such as peak detectors by the present invention,
And this signal of telecommunication is compared output with the threshold value preset, the signal of telecommunication of output controls and declining that input pulse signal is connected
Fall passage, makes whole radio frequency link can have bigger decay when input pulse signal is excessive, thus reaches to protect radio frequency electrical
The purpose that road is not damaged by.
Accompanying drawing explanation
Fig. 1 is the flow chart of the guard method of the present invention a kind of high-speed radio-frequency circuit；
Fig. 2 is the embodiment flow chart of the guard method of the present invention a kind of high-speed radio-frequency circuit；
Fig. 3 is the embodiment schematic diagram of the guard method of the present invention a kind of high-speed radio-frequency circuit；
Fig. 4 is the schematic diagram of the protection device of the present invention a kind of high-speed radio-frequency circuit；
Fig. 5 is the embodiment schematic diagram of the protection device of the present invention a kind of high-speed radio-frequency circuit.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is made into one
Step ground describes in detail.
Fig. 1 is the flow chart of the guard method of the present invention a kind of high-speed radio-frequency circuit, including:
S101: detect the input power of instantaneous pulse signal, is converted into reference signal value by described input power；
S102: default deflection threshold value, when this reference signal value is more than described deflection threshold value, conducting connects described
The attenuation path of pulse signal.
The present invention can use the framework of peak detector and high speed RF switch to realize correlation under the big signal that happens suddenly
The protection of frequency circuit.Conventional art can only keep input signal no longer to increase under the power set, and can not be in burst
Input signal is decayed, with more preferable protection circuit during big signal.And the present invention is by detecting instantaneous pulse signal
Input power, can have bigger decay when input power is more than setting value, in order to preferably protection circuit is not damaged by.
Fig. 2 is the embodiment flow chart of the guard method of the present invention a kind of high-speed radio-frequency circuit, and compared to Figure 1, Fig. 2 is tool
The flow chart of body embodiment.
S201: detect the input power of instantaneous pulse signal, is converted into reference signal value by described input power；
S202: set described deflection threshold value according to the input power that the maximum of radio circuit is born；
S203: when this reference signal value is more than described deflection threshold value, conducting connects the decay of described pulse signal and leads to
Road；
S204: when this reference signal value is less than described deflection threshold value, conducting connects the radio frequency of described pulse signal
Passage.
Described reference signal value is magnitude of voltage.In one embodiment, the pulse letter that peak detector detection is instantaneous is used
Number input power, described input power is converted into magnitude of voltage.The input power that maximum according to radio circuit is born sets
Described deflection threshold value.Described magnitude of voltage is compared with the deflection threshold value preset, when the comparison of peak detector exports
When being become high level by low level, the switch switching circuit being connected with this peak detector is become conducting state from closed mode,
Thus cause the control level of high speed RF switch to deflect, radio-frequency (RF) switch closes existing path, and turns on decay path,
Thus reduce radio-frequency input signals, the effect of protection radio frequency link.It should be added that, during switching radio frequency link,
Also should be according to the feature of radio frequency link, the maximal input etc. that such as can bear, described deflection thresholding is adjusted, in order to
Preferably protect this radio frequency link.
Wherein, the switch switching circuit of this circuit, it is to be made up of diode, metal-oxide-semiconductor and high speed RF switch, passes through peak
Value cymoscope compares the low and high level of output and controls.
Due to peak detector used in the present invention, and the switch handoff functionality that switch switching circuit is realized is all
Being constituted with High Speed Analog device, the protection response time of whole circuit is less than 50ns, it is ensured that radio frequency link is in instantaneous big pulse
Under be not damaged by.
Fig. 3 is the embodiment schematic diagram of the guard method of the present invention a kind of high-speed radio-frequency circuit.Below in conjunction with Fig. 2, Fig. 3 couple
The embodiment of the present invention is described in further detail.
With reference to Fig. 3, one high-speed radio-frequency protection circuit of the present invention at least includes such as lower part: peak detector 1, MCU is micro-
Control unit 2, switch switching circuit 3, wherein, peak detector 1 by test to input power be converted into correspondence reference believe
Number value, compare with the deflection threshold value provided by described micro-control unit 2, when the mould that the input power detected is converted into
When intending the deflection threshold value that magnitude of voltage provides more than micro-control unit 2, the output of peak detector 1 will be become high electricity from low level
Put down, and this high level is sent to the input of switch switching circuit 3, make the diode of input turn on metal-oxide-semiconductor, so that
The control level of the radio-frequency (RF) switch 4 of switch switching circuit 3 outfan deflects, and makes radio-frequency (RF) switch 4 close original radio frequency and leads to
Road, turns on highly attenuating path, thus reduces RF input power, reaches to protect the function of radio frequency link.
Specifically, the input power of actual measurement is converted into analog voltage, MCU micro-control unit 2 basis by peak detector 1
The input power that the maximum of radio circuit is born is set to described deflection threshold value.By the deflection threshold value that compares through digital-to-analogue conversion
Mouthful (DAC0) is converted into simulation threshold voltage and is sent to the VM foot of peak detector 1, peak detector 1 in inside by input power
The simulation threshold voltage that the analog voltage being converted into sends with MCU micro-control unit compares, when input power is converted into
Analog voltage less than simulation threshold voltage time, peak detector 1 output low level, low level is sent to switch switching electricity
The diode of front end, road, diode is in cut-off state, so the metal-oxide-semiconductor Q1 in the level switching circuit of metal-oxide-semiconductor composition is in
Cut-off state, metal-oxide-semiconductor Q2 is in the conduction state, and now level switching circuit is sent to the control voltage V1 of radio-frequency switch circuit 4
For high level, V2 is low level.Now the radio frequency path of radio-frequency (RF) switch 4 is conducting state, and decay path is closed mode.When defeated
When entering power increase, the analog voltage that peak detector 1 converts input power into increases the most therewith, when this analog voltage
When sending the simulation threshold voltage of peak detector 1 to more than MCU micro-control unit 2, the output of peak detector 1 will be by low electricity
Putting down and become high level, when high level is sent to diode by peak detector 1, diode is become by original cut-off state leads
Logical state, metal-oxide-semiconductor Q1 conducting in the level switching circuit being made up of metal-oxide-semiconductor, Q2 ends.The control that now level switching circuit sends
Level processed there occurs deflection, and V1 is become low level from high level, and V2 is become high level from low level.The radio frequency controlled by V1, V2
Switch 4 deflects due to control level, and radio frequency path is closed, decay path conducting.When input power is relatively big, more than set
Deflection threshold value, whole radio frequency link is highly attenuating path, thus reaches to protect the effect of radio frequency path.MCU micro-control unit
Obtain corresponding grid voltage according to ambient temperature, thus the grid voltage of radio frequency amplifier under high/low temperature is carried out more precise control, protect
Static working current or the radio-frequency performance of having demonstrate,proved radio frequency amplifier remain stable.
Further, it is also possible to described attenuation path is accessed attenuator or attenuation network, the isolation of regulation attenuation path
Attenuation rate, to meet the protection needs of real work high speed radio circuit.Compared with existing radio frequency protection circuit, the present invention
Overcome the conventional radio frequency protection circuit response time long, the shortcoming to burst signal defencive function difference.
Therefore, the present invention is in all communication radio frequency links, especially for the digital high-power merit combined with radio frequency
In putting, can there is good application prospect.
Fig. 4 is the schematic diagram of the protection device of the present invention a kind of high-speed radio-frequency circuit, including:
Detection converting unit, for detecting the input power of instantaneous pulse signal, is converted into ginseng by described input power
Examine signal value；
The signal comparing unit being connected with described detection converting unit, for by described reference signal value and the deflection preset
Threshold value compares；
The decay onunit being connected with described signal comparing unit, leads to for turning on the decay connecting described pulse signal
Road.
Fig. 4 with Fig. 1 is corresponding, and the method for operation of above-mentioned unit is identical with method.
Fig. 5 is the embodiment schematic diagram of the protection device of the present invention a kind of high-speed radio-frequency circuit.
As it is shown in figure 5, wherein in the middle of an embodiment, including:
The radio frequency onunit being connected with described signal comparing unit, leads to for turning on the radio frequency connecting described pulse signal
Road.
As it is shown in figure 5, wherein in the middle of an embodiment, detection converting unit includes:
The voltage conversion unit being connected with described signal comparing unit, for being converted to magnitude of voltage by described input power；
As it is shown in figure 5, wherein in the middle of an embodiment, also include:
The threshold settings unit being connected with described signal comparing unit, defeated for bear according to the maximum of radio circuit
Enter deflection threshold value described in power setting.
As it is shown in figure 5, wherein in the middle of an embodiment, also include:
The attenuation rate regulation unit being connected with described decay onunit, for adjusting the isolation decay of described attenuation path
Rate.
Fig. 5 with Fig. 2 is corresponding, and in figure, the method for operation of unit is identical with method.
Through the above description of the embodiments, those skilled in the art is it can be understood that can be by the present invention
Software adds the mode of required hardware platform and realizes, naturally it is also possible to all implemented by hardware.Based on such understanding,
What background technology was contributed by technical scheme can embody with the form of software product in whole or in part,
This computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions in order to make
Obtain a computer equipment (can be personal computer, server, or the network equipment etc.) and perform each embodiment of the present invention
Or the method described in some part of embodiment.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. the guard method of a high-speed radio-frequency circuit, it is characterised in that including:
The input power of the pulse signal that peak detector detection is instantaneous, is converted into analog voltage by described input power；
Micro-control unit presets deflection threshold value；
When described peak detector detects described analog voltage more than described deflection threshold value, the output of peak detector
High level will be become from low level, and this high level will be sent to the input of switch switching circuit, the diode of input with
Metal-oxide-semiconductor turns on, and the control level of the radio-frequency (RF) switch of switch switching circuit outfan deflects, and radio-frequency (RF) switch closes original penetrating
Frequently path, conducting connects the attenuation path of described pulse signal, and described attenuation path accesses attenuator or attenuation network, regulation
The isolation attenuation rate of attenuation path.
The guard method of high-speed radio-frequency circuit the most according to claim 1, it is characterised in that including:
When this analog voltage is less than described deflection threshold value, conducting connects the radio-frequency channel of described pulse signal.
The guard method of high-speed radio-frequency circuit the most according to claim 1 and 2, it is characterised in that described default deflection
The step of threshold value, including:
The input power that maximum according to radio circuit is born sets described deflection threshold value.
The guard method of high-speed radio-frequency circuit the most according to claim 1, it is characterised in that:
The isolation attenuation rate of described attenuation path is at least 20dB.
5. the protection device of a high-speed radio-frequency circuit, it is characterised in that include that peak detector, micro-control unit, switch are cut
Changing circuit and radio-frequency (RF) switch, described peak detector includes detection converting unit and signal comparing unit, and described radio-frequency (RF) switch is
Decay onunit, micro-control unit default deflection threshold value:
Detection converting unit, for detecting the input power of instantaneous pulse signal, is converted into simulation electricity by described input power
Pressure value；
The signal comparing unit being connected with described detection converting unit, for by described analog voltage and the deflection thresholding preset
Value compares, when the analog voltage that the input power detected is converted into is more than the deflection threshold value provided, and output height
Level is sent to the input of switch switching circuit, and the diode of input turns on metal-oxide-semiconductor；
The decay onunit being connected with described switch switching circuit outfan, for turning on the decay connecting described pulse signal
Passage, described attenuation path accesses attenuator or attenuation network, the isolation attenuation rate of regulation attenuation path.
The protection device of high-speed radio-frequency circuit the most according to claim 5, it is characterised in that including:
The radio frequency onunit being connected with described switch switching circuit outfan, for turning on the radio frequency connecting described pulse signal
Passage.
7. according to the protection device of the high-speed radio-frequency circuit described in claim 5 or 6, it is characterised in that also include:
The threshold settings unit being connected with described signal comparing unit, for the input work born according to the maximum of radio circuit
Rate sets described deflection threshold value.
The protection device of high-speed radio-frequency circuit the most according to claim 5, it is characterised in that also include:
The attenuation rate regulation unit being connected with described decay onunit, for adjusting the isolation attenuation rate of described attenuation path.
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| CN201210138575.0A CN103384146B (en) | 2012-05-04 | 2012-05-04 | The guard method of high-speed radio-frequency circuit and device |
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| CN201210138575.0A CN103384146B (en) | 2012-05-04 | 2012-05-04 | The guard method of high-speed radio-frequency circuit and device |
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| CN103384146B true CN103384146B (en) | 2016-12-14 |
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| CN105423366B (en) * | 2015-12-29 | 2018-01-09 | 京信通信技术(广州)有限公司 | Microwave output power control device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295872A (en) * | 2007-04-28 | 2008-10-29 | 昂宝电子（上海）有限公司 | System and method for providing overcurrent and overpower protection for power converter |
| CN102098007A (en) * | 2010-12-21 | 2011-06-15 | 广州杰赛科技股份有限公司 | Mismatch protection device for radio frequency (RF) amplifying circuit and method thereof |
| CN102202022A (en) * | 2011-03-31 | 2011-09-28 | 京信通信系统（中国）有限公司 | Method and device for protecting power amplifier in DPD (Digital Pre-Distortion) system |
| CN102244924A (en) * | 2011-07-01 | 2011-11-16 | 京信通信系统（中国）有限公司 | Automatic power gain control protection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006123350A2 (en) * | 2005-05-20 | 2006-11-23 | Paragon Communications Ltd. | Method for implementation and parameter settings of a voltage enhancement circuit for amplifiers as an integrated circuit (ic) |
-
2012
- 2012-05-04 CN CN201210138575.0A patent/CN103384146B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295872A (en) * | 2007-04-28 | 2008-10-29 | 昂宝电子（上海）有限公司 | System and method for providing overcurrent and overpower protection for power converter |
| CN102098007A (en) * | 2010-12-21 | 2011-06-15 | 广州杰赛科技股份有限公司 | Mismatch protection device for radio frequency (RF) amplifying circuit and method thereof |
| CN102202022A (en) * | 2011-03-31 | 2011-09-28 | 京信通信系统（中国）有限公司 | Method and device for protecting power amplifier in DPD (Digital Pre-Distortion) system |
| CN102244924A (en) * | 2011-07-01 | 2011-11-16 | 京信通信系统（中国）有限公司 | Automatic power gain control protection device |
Non-Patent Citations (1)
| Title |
|---|
| 一种微波功率测量检波电路的设计;贾兴斌等;《通信技术》;20091130;第42卷(第11期);第25-27页 * |
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Address after: 510663 Shenzhou Road 10, Science City, Guangdong, Guangzhou Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Science City, Guangdong, Guangzhou Patentee before: Comba Telecom System (China) Ltd. |
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