CN102969989A - Power synthesis device of radio frequency power amplifier - Google Patents
Power synthesis device of radio frequency power amplifier Download PDFInfo
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- CN102969989A CN102969989A CN 201210487123 CN201210487123A CN102969989A CN 102969989 A CN102969989 A CN 102969989A CN 201210487123 CN201210487123 CN 201210487123 CN 201210487123 A CN201210487123 A CN 201210487123A CN 102969989 A CN102969989 A CN 102969989A
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Abstract
The invention provides a power synthesis device of a radio frequency power amplifier, and the power synthesis device comprises a high power driving stage, a high power output stage, a control circuit, a selector switch and a first matching filter network; and a low power circuit is no longer additionally provided with a special lower power output stage, but the high power driving stage or the high power output stage in a high power circuit is used, so that the lower power circuit shares the high power driving stage or the high power output stage with the high power circuit, the state of the selector switch can be controlled through a control circuit in practical use, when the lower power circuit is conducted, the high power driving stage or the high power output stage in the high power circuit, which is not shared, is short-circuited, and only the shared high power driving stage or the high power output stage in the low power circuit is remained in the low power circuit. Due to the adoption of the power synthesis device, devices of the lower power circuit can be reduced, simplicity in control is realized, the area of a chip is also reduced, and the cost of the whole device is reduced.
Description
Technical field
The present invention relates to the radio circuit technical field, particularly a kind of power synthesizer of radio-frequency power amplifier.
Background technology
Radio-frequency power amplifier (RF PA) is the important component part of various transmitting sets.In the front stage circuits of transmitter, the radiofrequency signal power that radio-frequency (RF) transmit-receive circuit produces in the base band is very little, needs a series of amplification of process to obtain after enough radio-frequency powers, just can be fed on the antenna to radiate.In order to obtain enough large radio frequency power output, must adopt radio-frequency power amplifier.
The below introduces the operation principle of radio-frequency power amplifier when high and low power is synthetic.
Referring to Fig. 1, this figure is the power synthesizer schematic diagram of a kind of radio-frequency power amplifier of the prior art.
The parallel high and low power synthetic technique of available technology adopting carries out power amplification to the radiofrequency signal of input.As shown in Figure 1, when high-power mode, high power driving stage A1, A2 and high-power output level A3 conducting in the control circuit 100 control high-power passages, the low power output stage A4 that controls simultaneously in the low-power path turn-offs.For the input impedance that the prevents low power output stage impact on the high-power output level, between radio-frequency (RF) signal input end and low power output stage A4, be provided with the first interrupteur SW 1 in the prior art.When high-power mode, control circuit 100 controls the first interrupteur SW 1 disconnects.
During low-power mode, high power driving stage A1, A2 and high-power output level A3 in the control circuit 100 control high-power passages turn-off, and control simultaneously the low power output stage A4 conducting in the low-power path.
Need to prove that therefore low power level only has an output stage because power is lower.High-low power shares a radio frequency input.The high-low power synthetic technology realizes switching by a radio-frequency (RF) switch 200, high-low power synthesizes at antenna ANT place, because radio-frequency (RF) switch 200 is single pole multiple throw, only have simultaneously one tunnel conducting, therefore can avoid the signal between the matching network (the first matching network F1 and the second matching network F2) to disturb.
This high-power passage of the prior art and the concurrent working of low-power path cause the device that needs more, and chip area is large, cost and complexity are also higher.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of power synthesizer of radio-frequency power amplifier, can reduce number of devices, dwindles chip area, reduces cost and complexity.
The invention provides a kind of power synthesizer of radio-frequency power amplifier, comprising: high power driving stage, high-power output level, control circuit, diverter switch and the first matched filter network;
Under the high-power mode, high-power passage comprises high power driving stage, high-power output level and the first matched filter network; The input of described high power driving stage connects rf inputs, and the output of high power driving stage connects the input of high-power output level, and the output of high-power output level connects described the first matched filter network;
Under the low-power mode, the high power driving stage in the low-power path sharing high-power passage or the high-power output level in the shared high-power passage; When low-power path sharing high power driving stage, described low-power path comprises high power driving stage and diverter switch; When low-power path sharing high-power output level, described low-power path comprises diverter switch and high-power output level;
Described control circuit is used for controlling the state whether described high power driving stage, high-power output level are worked and controlled described diverter switch.
Preferably, described high power driving stage is two-stage, is respectively the first order high power driving stage and the second level high power driving stage that are cascaded.
Preferably, when low-power path sharing high power driving stage, also comprise the second matched filter network and radio-frequency (RF) switch;
One end of described diverter switch connects the input of described high-power output level, and the other end of diverter switch connects an end of described the second matched filter network, and the other end of the second matched filter network connects the low-power port of radio-frequency (RF) switch;
The output of described high-power output level connects the high power port of radio-frequency (RF) switch by described the first matched filter network.
Preferably, when low-power path sharing high power driving stage, also comprise the second matched filter network and radio-frequency (RF) switch;
One end of described diverter switch connects the output of described first order high power driving stage, and the other end of diverter switch connects an end of described the second matched filter network, and the other end of the second matched filter network connects the low-power port of radio-frequency (RF) switch;
The output of described high-power output level connects the high power port of radio-frequency (RF) switch by described the first matched filter network.
Preferably, when low-power path sharing high-power output level, described diverter switch is connected in parallel on the two ends of described high power driving stage.
Preferably, when low-power path sharing high-power output level, described diverter switch is connected in parallel on the two ends of described the second high power driving stage.
Compared with prior art, the present invention has the following advantages:
The power synthesizer of this radio-frequency power amplifier, special low power output stage is set in the low-power path no longer in addition, but the high power driving stage in the use high-power passage or high-power output level, share with high-power passage like this, during specific implementation, can control by control circuit the state of diverter switch, when the conducting of low-power path, high power driving stage or the short circuit of high-power output level in the high-power passage that does not share are fallen, in the low-power path, only be left the high power driving stage or the high-power output level that share.Can reduce like this device of low-power path, also simple thereby control is got up, dwindled simultaneously chip area, reduced the cost of whole device.
Description of drawings
Fig. 1 is the power synthesizer schematic diagram of a kind of radio-frequency power amplifier of the prior art;
Fig. 2 is power synthesizer embodiment one schematic diagram of radio-frequency power amplifier provided by the invention;
Fig. 3 is power synthesizer embodiment two schematic diagrames of radio-frequency power amplifier provided by the invention;
Fig. 4 is power synthesizer embodiment three schematic diagrames of radio-frequency power amplifier provided by the invention;
Fig. 5 is power synthesizer embodiment four schematic diagrames of radio-frequency power amplifier provided by the invention;
Fig. 6 is power synthesizer embodiment five schematic diagrames of radio-frequency power amplifier provided by the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
The embodiment of the invention provides a kind of power synthesizer of radio-frequency power amplifier, comprising: high power driving stage, high-power output level, control circuit, diverter switch and the first matched filter network;
Under the high-power mode, high-power passage comprises high power driving stage, high-power output level and the first matched filter network; The input of described high power driving stage connects rf inputs, and the output of high power driving stage connects the input of high-power output level, and the output of high-power output level connects described the first matched filter network;
Under the low-power mode, the high power driving stage in the low-power path sharing high-power passage or the high-power output level in the shared high-power passage; When low-power path sharing high power driving stage, described low-power path comprises high power driving stage and diverter switch; When low-power path sharing high-power output level, described low-power path comprises diverter switch and high-power output level;
Described control circuit is used for controlling the state whether described high power driving stage, high-power output level are worked and controlled described diverter switch.
The power synthesizer of this radio-frequency power amplifier, special low power output stage is set in the low-power path no longer in addition, but the high power driving stage in the use high-power passage or high-power output level, share with high-power passage like this, during specific implementation, can control by control circuit the state of diverter switch, when the conducting of low-power path, high power driving stage or the short circuit of high-power output level in the high-power passage that does not share are fallen, in the low-power path, only be left the high power driving stage or the high-power output level that share.Can reduce like this device of low-power path, also simple thereby control is got up, dwindled simultaneously chip area, reduced the cost of whole device.
Need to prove that the high power driving stage in the high-power passage can be one-level, also can be two-stage, also can be for more than the two-stage, the below is introduced take the high power driving stage as two-stage as example.
High power driving stage in the paper low-power path sharing high-power passage.In the situation, also comprise the second matched filter network and radio-frequency (RF) switch like this.
Referring to Fig. 2, this figure is power synthesizer embodiment one schematic diagram of radio-frequency power amplifier provided by the invention.
When low-power path sharing high power driving stage, also comprise the second matched filter network F2 and radio-frequency (RF) switch 200;
The end of described diverter switch SW1 connects the input of described high-power output level A3, and the other end of diverter switch SW1 connects the end of described the second matched filter network F2, and the other end of the second matched filter network F2 connects the low-power port of radio-frequency (RF) switch 200;
The output of described high-power output level A3 connects the high power port of radio-frequency (RF) switch 200 by described the first matched filter network F1.
In the present embodiment, low-power path and high-power passage share first order high power driving stage A1 and second level high power driving stage A2, first order high power driving stage A1 and second level high power driving stage A2 series connection.
When the high-power passage conducting, control circuit 100 control SW1 disconnect, and control simultaneously A1, A2 and A3 conducting.
When the conducting of low-power path, A1 and A2 conducting are controlled in control circuit 100 control SW1 conductings simultaneously, and control A3 turn-offs.
Because the match parameter of the first matched filter network F1 is mated according to A3, the match parameter of the second matched filter network F2 is to mate according to the A1 of front and A2, so two matching networks are distinguished to some extent, it is more flexible to the control ratio of parameter that two different matching networks are set, be understandable that, also two matching networks can be united two into one, the match parameter of this matching network when changing the work of low-power path and high-power passage by some switches, thus mate respectively for low-power path and high-power passage.
Referring to Fig. 3, this figure is power synthesizer embodiment two schematic diagrames of radio-frequency power amplifier provided by the invention.
Present embodiment and difference embodiment illustrated in fig. 2 are that low-power path and high-power passage share the first high power driving stage A1.
The end of described diverter switch SW1 connects the output of described first order high power driving stage A1, the other end of diverter switch SW1 connects the end of described the second matched filter network F2, and the other end of the second matched filter network F2 connects the low-power port of radio-frequency (RF) switch 200.
When the high-power passage conducting, control circuit 100 control SW1 disconnect, and control simultaneously A1, A2 and A3 conducting.
When the conducting of low-power path, the A1 conducting is controlled in control circuit 100 control SW1 conductings simultaneously, and control A2 and A3 turn-off.
The below introduces the high-power output level in the low-power path sharing high-power passage.In this case, do not comprise the second matched filter network and radio-frequency (RF) switch.Matched filter network of high-power passage and low-power path sharing gets final product.
Referring to Fig. 4, this figure is power synthesizer embodiment three schematic diagrames of radio-frequency power amplifier provided by the invention.
When low-power path sharing high-power output level A3, described diverter switch SW1 is connected in parallel on the two ends of described high power driving stage.Owing to comprise two-stage high power driving stage in the present embodiment, be respectively first order high power driving stage A1 and second level high power driving stage A2.So SW1 is connected in parallel on the input of first order high power driving stage A1 and the output of second level high power driving stage A2 in the present embodiment, when the SW1 conducting, with A1 and the equal short circuit of A2.
When the high-power passage conducting, control circuit 100 control SW1 disconnect, and control simultaneously A1, A2 and A3 conducting.
When the conducting of low-power path, the A3 conducting is controlled in control circuit 100 control SW1 conductings simultaneously, and control A1 and A2 turn-off.
In the present embodiment, the implementation shown in Figure 2 of comparing has been saved a matched filter network and radio-frequency (RF) switch.
Referring to Fig. 5, this figure is power synthesizer embodiment four schematic diagrames of radio-frequency power amplifier provided by the invention.
Present embodiment and difference embodiment illustrated in fig. 4 are the low-power path sharings in the high-power passage a high power driving stage and high-power output level.
Described diverter switch SW1 is connected in parallel on the two ends of described the second high power driving stage A2.
When the high-power passage conducting, control circuit 100 control SW1 disconnect, and control simultaneously A1, A2 and A3 conducting.
When the conducting of low-power path, A1 and A3 conducting are controlled in control circuit 100 control SW1 conductings simultaneously, and control A2 turn-offs.
Describe a kind of specific implementation of Fig. 2 illustrated embodiment in detail below in conjunction with accompanying drawing, referring to Fig. 6, this figure is power synthesizer embodiment five schematic diagrames of the radio-frequency power amplifier that provides of the embodiment of the invention.
The end of SW1 in the present embodiment connects the output of A2, and the other end connects the output of A3.
By the 3rd inductance L 3 the first matched filter network and the second matched filter network have been united two into one in the present embodiment.That is, low-power path and high-power passage share a matched filter network.This matched filter network comprises L3 and F1.
The structure of A2 and A3 is identical in the present embodiment, includes two NMOS pipes.The output of A2 connects power supply by the first inductance L 1, and the output of A3 connects power supply by the second inductance L 2.
When the conducting of low-power path, control circuit 100 control SW1 conductings are directly connected to output with low-power radio frequency signal by A2, and control circuit 100 control A3 close simultaneously.Realize the output of low-power radio frequency signal, reduce simultaneously power consumption, increase work efficiency.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (6)
1. the power synthesizer of a radio-frequency power amplifier is characterized in that, comprising: high power driving stage, high-power output level, control circuit, diverter switch and the first matched filter network;
Under the high-power mode, high-power passage comprises high power driving stage, high-power output level and the first matched filter network; The input of described high power driving stage connects rf inputs, and the output of high power driving stage connects the input of high-power output level, and the output of high-power output level connects described the first matched filter network;
Under the low-power mode, the high power driving stage in the low-power path sharing high-power passage or the high-power output level in the shared high-power passage; When low-power path sharing high power driving stage, described low-power path comprises high power driving stage and diverter switch; When low-power path sharing high-power output level, described low-power path comprises diverter switch and high-power output level;
Described control circuit is used for controlling the state whether described high power driving stage, high-power output level are worked and controlled described diverter switch.
2. the power synthesizer of radio-frequency power amplifier according to claim 1 is characterized in that, described high power driving stage is two-stage, is respectively the first order high power driving stage and the second level high power driving stage that are cascaded.
3. the power synthesizer of radio-frequency power amplifier according to claim 1 and 2 is characterized in that, when low-power path sharing high power driving stage, also comprises the second matched filter network and radio-frequency (RF) switch;
One end of described diverter switch connects the input of described high-power output level, and the other end of diverter switch connects an end of described the second matched filter network, and the other end of the second matched filter network connects the low-power port of radio-frequency (RF) switch;
The output of described high-power output level connects the high power port of radio-frequency (RF) switch by described the first matched filter network.
4. the power synthesizer of radio-frequency power amplifier according to claim 2 is characterized in that, when low-power path sharing high power driving stage, also comprises the second matched filter network and radio-frequency (RF) switch;
One end of described diverter switch connects the output of described first order high power driving stage, and the other end of diverter switch connects an end of described the second matched filter network, and the other end of the second matched filter network connects the low-power port of radio-frequency (RF) switch;
The output of described high-power output level connects the high power port of radio-frequency (RF) switch by described the first matched filter network.
5. the power synthesizer of radio-frequency power amplifier according to claim 1 is characterized in that, when low-power path sharing high-power output level, described diverter switch is connected in parallel on the two ends of described high power driving stage.
6. the power synthesizer of radio-frequency power amplifier according to claim 2 is characterized in that, when low-power path sharing high-power output level, described diverter switch is connected in parallel on the two ends of described the second high power driving stage.
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|---|---|---|---|
| CN 201210487123 CN102969989A (en) | 2012-11-26 | 2012-11-26 | Power synthesis device of radio frequency power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210487123 CN102969989A (en) | 2012-11-26 | 2012-11-26 | Power synthesis device of radio frequency power amplifier |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485904A (en) * | 2015-01-03 | 2015-04-01 | 广州钧衡微电子科技有限公司 | Wideband radio frequency power amplifier |
| CN104753476A (en) * | 2013-12-30 | 2015-07-01 | 国民技术股份有限公司 | Multimode multi-frequency power amplifier |
| CN105721003A (en) * | 2016-04-21 | 2016-06-29 | 宽兆科技(深圳)有限公司 | Circuit capable of expanding dynamic range of radio frequency output power of 5G frequency band |
| CN105978492A (en) * | 2016-04-27 | 2016-09-28 | 上海华虹宏力半导体制造有限公司 | Radio frequency power amplifier |
| CN108964623A (en) * | 2018-10-22 | 2018-12-07 | 深圳飞骧科技有限公司 | The radio-frequency power amplifier and its main circuit of one kind of multiple power modes |
| CN111342784A (en) * | 2020-05-20 | 2020-06-26 | 锐石创芯（深圳）科技有限公司 | Radio frequency power amplifier and application |
-
2012
- 2012-11-26 CN CN 201210487123 patent/CN102969989A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753476A (en) * | 2013-12-30 | 2015-07-01 | 国民技术股份有限公司 | Multimode multi-frequency power amplifier |
| CN104485904A (en) * | 2015-01-03 | 2015-04-01 | 广州钧衡微电子科技有限公司 | Wideband radio frequency power amplifier |
| CN105721003A (en) * | 2016-04-21 | 2016-06-29 | 宽兆科技(深圳)有限公司 | Circuit capable of expanding dynamic range of radio frequency output power of 5G frequency band |
| CN105978492A (en) * | 2016-04-27 | 2016-09-28 | 上海华虹宏力半导体制造有限公司 | Radio frequency power amplifier |
| CN108964623A (en) * | 2018-10-22 | 2018-12-07 | 深圳飞骧科技有限公司 | The radio-frequency power amplifier and its main circuit of one kind of multiple power modes |
| CN111342784A (en) * | 2020-05-20 | 2020-06-26 | 锐石创芯（深圳）科技有限公司 | Radio frequency power amplifier and application |
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Owner name: BEIJING ZHONGKE HANTIANXIA ELECTRONIC TECHNOLOGY C Free format text: FORMER OWNER: GUIZHOU ZHONGKE HUNTERSUN ELECTRONICS CO., LTD. Effective date: 20150514 |
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Application publication date: 20130313 |