CN201937550U - Multimode power amplifier and corresponding mobile communication equipment - Google Patents
Multimode power amplifier and corresponding mobile communication equipment Download PDFInfo
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- CN201937550U CN201937550U CN2011200443247U CN201120044324U CN201937550U CN 201937550 U CN201937550 U CN 201937550U CN 2011200443247 U CN2011200443247 U CN 2011200443247U CN 201120044324 U CN201120044324 U CN 201120044324U CN 201937550 U CN201937550 U CN 201937550U
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Abstract
The utility model discloses a multimode power amplifier which comprises two power amplifier paths and a control circuit. An input radio-frequency signal can be power amplified in one of the two power amplifier paths by the control of the control circuit so as to obtain an output radio-frequency signal, at least one power amplifier path is provided with a phase compensation circuit, so that the deviation or the transition between the signal phase of the amplification path being adjusted and the signal phase of the other amplification paths can be little, thereby reducing or avoiding the communication quality reduction during the mode switch.
Description
[technical field]
The present invention relates to the IC design field, especially relate to a kind of multimode power amplifier and corresponding mobile communication equipment.
[background technology]
Modern mobile communcations system, particularly mobile phone in order to prolong the service time of lithium battery, increase the air time, reduce the electric current of power amplifier, and improving efficiency power amplifier is one of effective way.People have invented the method for much effectively raising the efficiency for this reason, as E class and F power-like amplifier.This power-like amplifier can reach very high effective efficiency in power output when saturated.
But in communication system, system does not need very high transmitting power sometimes, and for all there is very high efficient in the system that makes under different emission states, people have proposed the multimode power amplifier.The multimode power amplifier is exactly according to the communication system power demand, sets the size of transmitting power.Common described multimode power amplifier includes three kinds of mode of operations, be respectively low-power mode (low power mode, LPM), middle power mode (middle power mode, MPM), high-power mode (high power mode, HPM).The multimode power amplifier is widely used in the 3G/4G mobile phone.
Although this type of multimode power amplifier can improve the effective efficiency of system effectively, but this power-like amplifier has a significant disadvantages, be exactly that discontinuous phase hit is arranged between each pattern, the saltus step of this phase place will cause the distortion of signal of communication, thereby communication quality is descended.
Therefore, wish to propose a kind of improved multimode power amplifier and overcome the problems referred to above.
[summary of the invention]
One of technical problem solved by the invention is to provide a kind of multimode power amplifier, and the phase deviation between its each pattern is less.
Two of technical problem solved by the invention is to provide a kind of mobile communication equipment, and it adopts the multimode power amplifier, and the phase deviation between each pattern is less.
In order to address the above problem, according to an aspect of the present invention, the invention provides a kind of multimode power amplifier, it comprises two power amplification paths and control circuit, according to the control of described control circuit can be in two power amplification paths one the input radio frequency signal is carried out power amplification to obtain exporting radiofrequency signal.In at least one power amplification path, be provided with phase compensating circuit.
Further, described multimode power amplifier has three mode of operations, be respectively low-power mode, middle power mode and high-power mode, the shared power amplification path of low-power mode and middle power mode, the collector voltage that described control circuit amplifies the amplifier transistor in the path by power controlling is realized the switching of low-power mode and middle power mode, and high-power mode adopts a power amplification path separately.
Further, every power amplification path comprises input matching circuit, first order power amplification circuit, intervalve matching circuit and the final stage power amplification circuit that connects successively, is connected with an output matching circuit behind each power amplification path.
Further again, before described phase compensating circuit is arranged at the input matching circuit in corresponding power amplification path.
Further, described phase compensating circuit is a delay line.
Further, described phase compensating circuit is a phase-shifter.
Further, described phase compensating circuit is a vector modulator.
Further, described vector modulator comprises signal shunt, delay line, first attenuator, second attenuator and signal combiner, described signal shunt is divided into the first via signal and the second road signal with input signal, wherein first via signal via described delay line and first attenuator to described signal combiner, the second road signal via second attenuator to described signal combiner, described signal combiner after with the decay of first attenuator output first via signal and the second road signal after the decay of second attenuator output synthesize one tunnel output signal.
According to another aspect of the present invention, the invention provides a kind of mobile communication equipment, it comprises a multimode power amplifier.Described multimode power amplifier comprises two power amplification paths and control circuit, according to the control of described control circuit can be in two power amplification paths one the input radio frequency signal is carried out power amplification to obtain exporting radiofrequency signal.In at least one power amplification path, be provided with phase compensating circuit.
Compared with prior art, at least one the amplifying and to have set up the phase place that phase compensating circuit is adjusted signal in this amplification path in the path therein of multimode power amplifier in the present invention, very little so that this is adjusted the signal phase that amplifies in the path with deviation or saltus step that other amplifies the signal phase in the path, to reduce or to avoid causing when the mode switch communication quality decline.
About other purposes of the present invention, feature and advantage are described in detail in embodiment below in conjunction with accompanying drawing.
[description of drawings]
In conjunction with reaching ensuing detailed description with reference to the accompanying drawings, the present invention will be more readily understood, the structure member that wherein same Reference numeral is corresponding same, wherein:
Fig. 1 shows the block diagram of first embodiment of the multimode power amplifier among the present invention;
Fig. 2 shows the block diagram of second embodiment of the multimode power amplifier among the present invention;
Fig. 3 shows the block diagram of the 3rd embodiment of the multimode power amplifier among the present invention;
Fig. 4 shows the block diagram of the 4th embodiment of the multimode power amplifier among the present invention;
Fig. 5 shows the block diagram of the 5th embodiment of the multimode power amplifier among the present invention;
Fig. 6 shows the block diagram of the 6th embodiment of the multimode power amplifier among the present invention;
Fig. 7 shows the block diagram of an embodiment of the vector modulator among the present invention; With
Fig. 8 is the synthetic schematic diagram of the vector of the vector modulator among Fig. 7.
[embodiment]
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Detailed description of the present invention mainly presents by program, step, logical block, process or other symbolistic descriptions, the running of the technical scheme among its direct or indirect simulation the present invention.Affiliated those of skill in the art use these descriptions herein and state that the others skilled in the art in affiliated field effectively introduce their work essence.
Alleged herein " embodiment " or " embodiment " are meant that special characteristic, structure or the characteristic relevant with described embodiment can be contained at least one implementation of the present invention at least.Different local in this manual " in one embodiment " that occur also nonessentially all refer to same embodiment, must not be yet with other embodiment mutually exclusive separately or select embodiment.In addition, represent the sequence of modules in method, flow chart or the functional block diagram of one or more embodiment and revocablely refer to any particular order, also be not construed as limiting the invention.
Fig. 1 shows the block diagram of first embodiment 100 of the multimode power amplifier among the present invention.Described multimode power amplifier 100 comprises two power amplification paths and control circuit 150, in the first power amplification path, comprise the input matching circuit 111, first order power amplification circuit 112, intervalve matching circuit 113 and the final stage power amplification circuit 114 that connect successively, in the second power amplification path, comprise the input matching circuit 121, first order power amplification circuit 122, intervalve matching circuit 123 and the final stage power amplification circuit 124 that connect successively, behind two power amplification paths, be connected with an output matching circuit 130.
Three mode of operations of the described multimode power amplifier 100 of described control circuit 150 controls, be respectively low-power mode (low power mode, LPM), middle power mode (middle power mode, MPM) and high-power mode (high power mode, HPM).When input control signal VEN is effective, make power amplification circuit 112,114,122 and 124 in running order (even the described power amplification circuit of energy).When being first level (such as high level), input control signal VM0 controls the work of the first power amplification path, radio-frequency input signals (RF IN) enters the first power amplification path and carries out power amplification like this, this moment is if input control signal VM1 is first level, the current collection of power controlling amplifying circuit 112 and 114 amplifier transistor first voltage very then, this moment, the first power amplification path was operated in low-power mode, if input control signal VM1 is second level, the current collection of power controlling amplifying circuit 112 and 114 amplifier transistor second voltage very then, this moment, the first power amplification path was operated in middle power mode.Control second power amplification path work when input control signal VM0 is second level (such as low level), radio-frequency input signals (RF IN) enters the second power amplification path and carries out power amplification like this, is operated in high-power mode at this moment.
As can be seen, power amplification path of the common employing of low-power mode and middle power mode, realize the switching of low-power mode and middle power mode by the collector voltage of control amplifier transistor, and high-power mode adopts a power amplification path separately, realizes the switching of low/middle power mode and high-power mode by input control signal VM0.
At described power amplifier 100 be low/during middle power mode, the radio frequency output signal after radio-frequency input signals RF IN obtains amplifying through input matching circuit 111, first order power amplification circuit 112, intervalve matching circuit 113, final stage power amplification circuit 114 and output matching circuit 130 successively.When described power amplifier 100 is high-power mode, the radio frequency output signal after radio-frequency input signals RF IN obtains amplifying through input matching circuit 121, first order power amplification circuit 122, intervalve matching circuit 123, final stage power amplification circuit 124 and output matching circuit 130 successively.Described input matching circuit, intervalve matching circuit and output matching circuit can play matching effect, and excess loss power can not guarantee maximum transmission coefficient.First order power amplification circuit can carry out first order power amplification to radio-frequency input signals RF IN, and the final stage power amplification circuit can carry out partial power amplification to radio-frequency input signals RF IN.Like this, in each power amplification path, adopt the secondary power amplification, promptly used the two stage power amplifying circuit, in other embodiments, can also adopt three grades, level Four or more multistage power amplification, between per two power amplification circuits, all be provided with intervalve matching circuit.
The concrete power output area of described multimode power amplifier 100 is as follows: when low-power mode, and power output Po≤8dBm, wherein efficient is approximately 5%; When middle power mode, 8dBm＜Po≤19dBm, wherein efficient is approximately 20%; When high-power mode, 19dBm＜Po≤28dBm, wherein efficient is approximately 40%.
Described in background, between each pattern of multimode power amplifier discontinuous phase hit is arranged.And for the multimode power amplifier 100 among the present invention, at power mode from low-power mode switches to or when therefrom power mode switches to low-power mode, because the power mode saltus step is carried out in same power amplification path, what phase hit showed is not clearly; From low/power mode switch to high-power mode or switch to from high-power mode low/during power mode, then phase hit is quite big.
One of characteristics of multimode power amplifier 100 among the present invention just are: delay line (delay line) 140 is set in the first power amplification path, be used for the radiofrequency signal on this path is postponed an end time or a phase bit, can reduce the phase hit that causes in the mode switch process like this.As shown in Figure 1, before described delay line inserts in described input matching circuit 111.In this embodiment, the phase place of the radiofrequency signal in the first power amplification path is ahead of the phase place of the radiofrequency signal in the second power amplification path, can reduce by two phase differences in the power amplification path by described delay line is set.
Fig. 2 shows the block diagram of second embodiment 200 of the multimode power amplifier among the present invention.The difference of the multimode power amplifier 100 among described multimode power amplifier 200 and Fig. 1 is: the former is provided with delay line (delay line) 240 in the second power amplification path, and the latter is provided with described delay line 140 in the first power amplification path.Described delay line 240 can be used for the radiofrequency signal on this path is postponed an end time or a phase bit, can reduce the phase hit that causes in the mode switch process like this.Before described delay line 240 inserts in described input matching circuit 121.In this embodiment, the phase place of the radiofrequency signal in the second power amplification path is ahead of the phase place of the radiofrequency signal in the first power amplification path, can reduce by two phase differences in the power amplification path by described delay line is set.
Fig. 3 shows the block diagram of the 3rd embodiment 300 of the multimode power amplifier among the present invention.The difference of the multimode power amplifier 100 among described multimode power amplifier 300 and Fig. 1 is: what the former was provided with in the first power amplification path is phase-shifter (Phase Shifter) 340, and what the latter then was provided with in the first power amplification path is delay line (delay line) 140.Described phase-shifter 340 can be used for adjusting the phase place of the radiofrequency signal on this path to reduce the phase hit that the mode switch process causes.Before described phase-shifter inserts in described input matching circuit 111.
Fig. 4 shows the block diagram of the 4th embodiment 400 of the multimode power amplifier among the present invention.The difference of the multimode power amplifier 300 among described multimode power amplifier 400 and Fig. 3 is: the former is provided with phase-shifter 440 in the second power amplification path, and the latter is provided with described phase-shifter 340 in the first power amplification path.The phase place that described phase-shifter 440 can be used for adjusting the radiofrequency signal on this path also can also can play the function of predistortion to reduce the phase hit that the mode switch process causes, with the non-linear distorted signals brought of compensation by power amplifier.Before described phase-shifter 440 inserts in described input matching circuit 121.
Fig. 5 shows the block diagram of the 5th embodiment 500 of the multimode power amplifier among the present invention.The difference of the multimode power amplifier 100 among described multimode power amplifier 500 and Fig. 1 is: what the former was provided with in the first power amplification path is vector modulator (Vector Modulator) 540, and what the latter then was provided with in the first power amplification path is delay line (delay line) 140.The phase place that described vector modulator 540 can be used for adjusting the radiofrequency signal on this path also can also can play the function of predistortion to reduce the phase hit that the mode switch process causes, with the non-linear distorted signals brought of compensation by power amplifier.Before described vector modulator 540 inserts in described input matching circuit 111.
Fig. 6 shows the block diagram of the 6th embodiment 600 of the multimode power amplifier among the present invention.The difference of the multimode power amplifier 500 among described multimode power amplifier 600 and Fig. 5 is: the former is provided with vector modulator 640 in the second power amplification path, and the latter is provided with described vector modulator 540 in the first power amplification path.The phase place that described vector modulator 640 can be used for adjusting the radiofrequency signal on this path also can also can play the function of predistortion to reduce the phase hit that the mode switch process causes, with the non-linear distorted signals brought of compensation by power amplifier.Before described vector modulator 640 inserts in described input matching circuit 121.
Fig. 7 shows the block diagram of an embodiment 700 of the vector modulator among the present invention.Described vector modulator 700 comprises signal shunt 710, delay line 720, first attenuator 730, second attenuator 740 and signal combiner 750.Described signal shunt is divided into the first via signal and the second road signal with input signal, wherein first via signal via delay line 720 and first attenuator 730 to described signal combiner 750, the second road signal via second attenuator 740 to described signal combiner 750.720 pairs of described first via signals of described delay line postpone, and the first via signal after 730 pairs of delays of described first attenuator is decayed, and 720 pairs of described the second road signals of described second attenuator are decayed.Described signal combiner 750 after with the decay of first attenuator 730 output first via signal and the second road signal after the decay of second attenuator, 740 outputs synthesize one tunnel output signal.
Described vector modulator 700 can play the function of predistortion, can compensate the non-linear distorted signals of bringing by power amplifier like this.The specific design process is debugged phase compensation under linear small-signal situation, promptly debug attenuator dc voltage and phase retardation, under large-signal conditions, the first via produces strong nonlinearity under the large-signal effect, there is intermodulation signal on the both sides that show as two-way for two paths of signals, the second the tunnel is linear circuit, the synthetic back of two paths of signals is that original input signal keeps original information, but reverse intermodulation information is arranged simultaneously, reverse intermodulation information is behind power amplifier, reverse with the intermodulation that power amplifier produces, thus offset the nonlinear effect that causes of compensated amplifier by this way.
Fig. 8 is the synthetic schematic diagram of the vector of the vector modulator 700 among Fig. 7, wherein A1 is the amplitude of the first via input signal of signal combiner, φ 1 is the phase place of the first via signal of signal combiner, A2 is the amplitude of the second road input signal of signal combiner, φ 2 is the phase place of the first via signal of signal combiner, A is the amplitude of the output signal of signal combiner, and φ is the phase place of the output signal of signal combiner.A1 is relevant with the attenuation amplitude of first attenuator 730, and A2 is relevant with the attenuation amplitude of second attenuator 740, and φ 1 is relevant with the time of delay of delay line 720.From the vector composite diagram as can be seen, as long as select proper A 1 and A2, just can obtain required any A and φ.Can obtain required phase shift thus.Accordingly as can be seen from Figure, as long as select suitable amplitude, the A of amplitude can obtain arbitrarily.In selecting phase shift and pre-distorted signals process, we can find a signal to satisfy the requirement of phase shift and predistortion simultaneously, and these two signals are required signal.
In other embodiments, described compensating circuit (such as delay line, phase-shifter, vector modulator or other phase compensating circuits etc.) also can be set at before the intervalve matching circuit or other positions in this power amplification path.
In sum, include at least two power amplification paths in the multimode power amplifier among the present invention, phase compensating circuit (such as delay line, phase-shifter, vector modulator or other phase compensating circuits etc.) is set at least one power amplification path, very little so that this is adjusted the signal phase that amplifies in the path with the deviation or the saltus step of the signal phase in other power amplification path, to reduce or to avoid causing when the mode switch communication quality decline.
The invention allows for a kind of mobile communication equipment that adopts the multimode power amplifier after the improvement, when mode switch, this mobile communication equipment still has higher communication quality.
The implication that links to each other or connect among the present invention not only comprises directly joins or connects, also comprises linking to each other indirectly or connecting, such as via continuous behind a resistance, the functional circuit.
Above the present invention has been carried out the enough detailed description with certain particularity.Under those of ordinary skill in the field should be appreciated that the description among the embodiment only is exemplary, under the prerequisite that does not depart from true spirit of the present invention and scope, make change and all should belong to protection scope of the present invention.The present invention's scope required for protection is limited by described claims, rather than limit by the foregoing description among the embodiment.
Claims (9)
1. multimode power amplifier, it comprises two power amplification paths and control circuit, according to the control of described control circuit can be in two power amplification paths one the input radio frequency signal is carried out power amplification to obtain exporting radiofrequency signal, it is characterized in that, at least one power amplification path, be provided with phase compensating circuit.
2. multimode power amplifier according to claim 1, it is characterized in that, described multimode power amplifier has three mode of operations, be respectively low-power mode, middle power mode and high-power mode, the shared power amplification path of low-power mode and middle power mode, the collector voltage that described control circuit amplifies the amplifier transistor in the path by power controlling is realized the switching of low-power mode and middle power mode, and high-power mode adopts a power amplification path separately.
3. multimode power amplifier according to claim 2, it is characterized in that, every the power amplification path comprises input matching circuit, first order power amplification circuit, intervalve matching circuit and the final stage power amplification circuit that connects successively, is connected with an output matching circuit behind each power amplification path.
4. multimode power amplifier according to claim 3 is characterized in that, before described phase compensating circuit is arranged at the input matching circuit in corresponding power amplification path.
5. according to the arbitrary described multimode power amplifier of claim 1-4, it is characterized in that described phase compensating circuit is a delay line.
6. according to the arbitrary described multimode power amplifier of claim 1-4, it is characterized in that described phase compensating circuit is a phase-shifter.
7. according to the arbitrary described multimode power amplifier of claim 1-4, it is characterized in that described phase compensating circuit is a vector modulator.
8. multimode power amplifier according to claim 7, it is characterized in that, described vector modulator comprises signal shunt, delay line, first attenuator, second attenuator and signal combiner, described signal shunt is divided into the first via signal and the second road signal with input signal, wherein first via signal via described delay line and first attenuator to described signal combiner, the second road signal via second attenuator to described signal combiner, described signal combiner after with the decay of first attenuator output first via signal and the second road signal after the decay of second attenuator output synthesize one tunnel output signal.
9. a mobile communication equipment is characterized in that, it comprises arbitrary described multimode power amplifier according to claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200443247U CN201937550U (en) | 2011-02-22 | 2011-02-22 | Multimode power amplifier and corresponding mobile communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200443247U CN201937550U (en) | 2011-02-22 | 2011-02-22 | Multimode power amplifier and corresponding mobile communication equipment |
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| CN201937550U true CN201937550U (en) | 2011-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122922A (en) * | 2011-02-22 | 2011-07-13 | 雷良军 | Multimode power amplifier and corresponding mobile communication equipment |
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2011
- 2011-02-22 CN CN2011200443247U patent/CN201937550U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122922A (en) * | 2011-02-22 | 2011-07-13 | 雷良军 | Multimode power amplifier and corresponding mobile communication equipment |
| CN102122922B (en) * | 2011-02-22 | 2014-05-21 | 雷良军 | Multimode power amplifier and corresponding mobile communication equipment |
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Legal Events
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| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI ZHONGPU MICROELECTRONICS CO., LTD. Free format text: FORMER OWNER: LEI LIANGJUN Effective date: 20131220 Free format text: FORMER OWNER: REN QIMING Effective date: 20131220 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214072 WUXI, JIANGSU PROVINCE TO: 214000 WUXI, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20131220 Address after: 214000 Jiangsu city of Wuxi province DiCui Binhu District Liyuan Development Zone, Road No. 100, No. 2 building, 530 floor 13 Patentee after: Wuxi Zhongpu Microelectronics Co., Ltd. Address before: 214072 Jiangsu city of Wuxi province DiCui Binhu District Liyuan Development Zone, Road No. 100 building No. 2 building 1506 room 530 Patentee before: Lei Liangjun Patentee before: Ren Qiming |
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| AV01 | Patent right actively abandoned |
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| RGAV | Abandon patent right to avoid regrant |