CN202737813U - Multimode power amplifier and corresponding mobile communication equipment - Google Patents
Multimode power amplifier and corresponding mobile communication equipment Download PDFInfo
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- CN202737813U CN202737813U CN 201220279835 CN201220279835U CN202737813U CN 202737813 U CN202737813 U CN 202737813U CN 201220279835 CN201220279835 CN 201220279835 CN 201220279835 U CN201220279835 U CN 201220279835U CN 202737813 U CN202737813 U CN 202737813U
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Abstract
The utility model discloses a multimode power amplifier which comprises an adjustable-power amplifying module with multiple power modes, a front end matching circuit connected with the front end of the adjustable-power amplifying module, and a rear end matching circuit connected with the rear end of the adjustable-power amplifying module. An input radio-frequency signal sequentially passes through the front end matching circuit, the adjustable-power amplifying module and the rear end matching circuit so as to obtain an output radio-frequency signal. The adjustable-power amplifying module performs power amplification on the input radio-frequency signal; the adjustable-power amplifying module comprises multiple controllable-power amplifying units; and the controllable-power amplifying units are enabled or/and disabled to adjust the gain of the adjustable-power amplifying module, so that the adjustable-power amplifying module works in different power modes. Thus, multiple power modes can be realized by use of one adjustable-power amplifying module, and the way can reduce the cost and save the area. The utility model also discloses a movable communication terminal which comprises the multimode power amplifier.
Description
[technical field]
The utility model relates to the IC design field, especially relates 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 a lot of Effective Raise efficient for this reason, as E class and F power-like amplifier.This power-like amplifier can reach very high effective efficiency at power stage when saturated.
But in communication system, system does not need very high transmitting power sometimes, and for so that there is very high efficient in system under different emission states, people have proposed multimode power amplifier ((Multi-Mode Power Amplifier).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).Multimode power amplifier is widely used in the 3G/4G mobile phone.
Fig. 1 shows a kind of typical multimode power amplifier in the prior art.As shown in Figure 1, described multimode power amplifier comprises three power amplification paths, be respectively low-power amplification path, middle power amplification path and high power amplification path, include the first switching circuit, input matching circuit, power amplifier module (Q on each power amplification path
L, Q
MOr Q
H), output matching circuit and second switch circuit.When low-power mode, by controlling each switching circuit so that the conducting of low-power amplification path, other power amplification path cut-off, input radio frequency signal RF IN obtains the radio frequency output signal RF OUT after the power amplification after through the low-power amplification path.When middle power mode, by controlling each switching circuit so that middle power amplification path conducting, other power amplification path cut-off, input radio frequency signal RF IN through in obtain radio frequency output signal RF OUT after the power amplification behind the power amplification path.When high-power mode, by controlling each switching circuit so that the conducting of high power amplification path, other power amplification path cut-off, input radio frequency signal RF IN obtains the radio frequency output signal RF OUT after the power amplification after through the high power amplification path.
Although this type of multimode power amplifier is the effective efficiency of improved system effectively, but this power-like amplifier has following shortcoming: 1, 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; 2, need to be for the independent power amplification path of each mode development, the design cycle is long, and development cost is high; 3, the area that takies of the multimode power amplifier of this type of framework is larger, etc.
Therefore, wish to propose a kind of improved multimode power amplifier and overcome the problems referred to above.
[utility model content]
One of technical problem that the utility model solves is to provide a kind of multimode power amplifier, and it occupies less area, and cost is lower, and the phase hit between each pattern is less.
Two of the technical problem that the utility model solves is to provide a kind of mobile communication equipment, and it adopts multimode power amplifier, and this multimode power amplifier occupies less area, and cost is lower, and the phase hit between each pattern is less.
In order to address the above problem, according to an aspect of the present utility model, the utility model provides a kind of multimode power amplifier, and it comprises the power-adjustable amplification module with a plurality of power modes, the rear end match circuit that is connected in the front end match circuit of described power-adjustable amplification module front end and is connected in described power-adjustable amplification module rear end.The input radio frequency signal obtains exporting radiofrequency signal through front end match circuit, power-adjustable amplification module and rear end match circuit successively.Described power-adjustable amplification module carries out power amplification to the radiofrequency signal of input, described power-adjustable amplification module comprises a plurality of controlled power amplifying units, or/and the described controlled power amplifying unit of disable is adjusted the gain of described power-adjustable amplification module, and then so that described power-adjustable amplification module works in different power modes by enabling.
Further, the base stage of each controlled power amplifying unit is connected to each other rear input as the power-adjustable amplification module, the emitter grounding of each controlled power amplifying unit, the collector electrode of each controlled power amplifying unit is connected to each other rear output as the power-adjustable amplification module, and the bias voltage of the base stage by controlling each controlled power amplifying unit can enable the controlled power amplifying unit corresponding with disable.
Further, when described power-adjustable amplification module worked in a power mode, it enabled a predetermined number controlled power amplifying unit, remaining controlled power amplifying unit of disable; When described power-adjustable amplification module worked in another power mode, it enabled another predetermined number controlled power amplifying unit, remaining controlled power amplifying unit of disable.
Further, have at least the Partial Power amplifying unit namely to be enabled under therein a kind of power mode, under another kind of power mode, be enabled again.
Further, described front end match circuit and/or rear end match circuit are adjustable, to mate the different power mode of described power-adjustable amplification module.
According to another aspect of the present utility model, the utility model provides a kind of mobile communication terminal, and it comprises multimode power amplifier.Described multimode power amplifier, it comprises the power-adjustable amplification module with a plurality of power modes, the rear end match circuit that is connected in the front end match circuit of described power-adjustable amplification module front end and is connected in described power-adjustable amplification module rear end.The input radio frequency signal obtains exporting radiofrequency signal through front end match circuit, power-adjustable amplification module and rear end match circuit successively.Described power-adjustable amplification module carries out power amplification to the radiofrequency signal of input, described power-adjustable amplification module comprises a plurality of controlled power amplifying units, or/and the described controlled power amplifying unit of disable is adjusted the gain of described power-adjustable amplification module, and then so that described power-adjustable amplification module works in different power modes by enabling.
Compared with prior art, has a power-adjustable amplification module in the multimode power amplifier in the utility model, this power-adjustable amplification module includes plural number controlled power amplifying unit in parallel, by enabling or/and the controlled power amplifying unit in this power-adjustable amplification module of disable can be adjusted the overall gain of described this power-adjustable amplification module.So only need a power-adjustable amplification module just can realize the multiple power pattern, with respect to the mode that designs independent power amplifier module in the prior art for each power mode, this mode in the utility model more can reduce cost, saves area.
Further, owing to only having a power amplification path, the discontinuous phase hit between each pattern is very little, even does not have, and communication quality can not be affected because pattern switches or affect very little.
About other purposes of the present utility model, feature and advantage are described in detail in embodiment below in conjunction with accompanying drawing.
[description of drawings]
In conjunction with reaching with reference to the accompanying drawings ensuing detailed description, the utility model will be more readily understood, structure member corresponding to same Reference numeral wherein, wherein:
Fig. 1 is the structured flowchart of a kind of typical multimode power amplifier of the prior art;
Fig. 2 is the structured flowchart of the first embodiment of the multimode power amplifier in the utility model;
Fig. 3 is the power-adjustable amplification module circuit diagram in one embodiment among Fig. 2;
Fig. 4 shows the structured flowchart of the second embodiment of the multimode power amplifier in the utility model.
[embodiment]
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Detailed description of the present utility model mainly presents by program, step, logical block, process or other symbolistic descriptions, the running of the technical scheme in its direct or indirect simulation the utility model.Affiliated those of skill in the art use herein these descriptions and statement essential to the work that the others skilled in the art in the affiliated field effectively introduce them.
Alleged " embodiment " or " embodiment " refer to that special characteristic, structure or the characteristic relevant with described embodiment can be contained at least one implementation of the utility model at least herein.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 do not consist of restriction of the present utility model.
Fig. 2 shows the block diagram of the first embodiment 200 of the multimode power amplifier in the utility model.Described multimode power amplifier 200 comprises input matching circuit 210, power-adjustable amplification module 220 and output matching circuit 230.The input termination radio-frequency input signals RFIN of input matching circuit 210, the input of output termination power-adjustable amplification module 220, radio frequency output signal RFOUT after the output of the output termination output matching circuit 230 of power-adjustable amplification module 220, output matching circuit 230 amplify by its output power output.Input matching circuit 210 also can be referred to as the front end match circuit of power-adjustable amplification module 220, and output matching circuit 220 also can be referred to as the rear end match circuit of power-adjustable amplification module 220.When work, radio-frequency input signals RFIN obtains radio frequency output signal RFOUT through behind input matching circuit 210, power-adjustable amplification module 220 and the output matching circuit 230 successively.
The input impedance of 210 pairs of multimode power amplifiers of described input matching circuit is mated, and the output impedance of 230 pairs of multimode power amplifiers of described output matching circuit is mated.Described power-adjustable amplification module 220 can carry out power amplification to the radiofrequency signal of input, and the gain of described power-adjustable amplification module 220 is adjustable.
Fig. 3 shows power-adjustable amplification module 220 circuit diagram in one embodiment among Fig. 2.As shown in Figure 3, described power-adjustable amplification module 220 comprises a plurality of controlled power amplifying unit Q1, Q2, Qn.The base stage of each controlled power amplifying unit is connected to each other rear input as power-adjustable amplification module 220, the emitter grounding of each controlled power amplifying unit, the collector electrode of each controlled power amplifying unit are connected to each other rear output as power-adjustable amplification module 220.The bias voltage Vb of the base stage by controlling each controlled power amplifying unit can enable the controlled power amplifying unit corresponding with disable, such as for power amplification unit Q1, control the bias voltage Vb of its base stage, whether can control this power amplification unit Q1 works, if work, then this power amplification unit Q1 carries out to a certain degree power amplification to the signal of input.These controlled power amplifying unit stack ups form the power-adjustable amplification module, come input signal is carried out power amplification.
In one embodiment, described power-adjustable amplification module 220 has three power modes, is respectively low-power mode, middle power mode and high-power mode.Such as, when low-power mode, power output Po≤8dBm, when middle power mode, 8dBm＜Po≤19dBm, when high-power mode, 19dBm＜Po≤28dBm.When power-adjustable amplification module 220 is low-power mode, enable the first number controlled power amplifying unit, remaining controlled power amplifying unit of disable, thus the entire gain of power-adjustable amplification module 220 adjusted, so that its power output low-power mode scope up to specification.When power-adjustable amplification module 220 is middle power mode, enable the second number controlled power amplifying unit, remaining controlled power amplifying unit of disable, thus the entire gain of power-adjustable amplification module 220 adjusted, so that its power output middle power mode scope up to specification.When power-adjustable amplification module 220 is high-power mode, enable the 3rd a number controlled power amplifying unit, remaining controlled power amplifying unit of disable, thus the entire gain of power-adjustable amplification module 220 adjusted, so that its power output high-power mode scope up to specification.Wherein the first number is less than the second number, and the second number is that 100, the second numbers are that 400, the three numbers are 1000 less than the 3rd number such as the first number.When different power modes, some power amplification unit all is multiplexing, such as when the high-power mode, and the power amplification unit in the time of can using low-power mode, when middle power mode, the power amplification unit in the time of also can using low-power mode.In other words, have at least the Partial Power amplifying unit namely to be enabled under therein a kind of power mode, under another kind of power mode, be enabled again.
When low-power mode, only have the power amplification unit of small part to be enabled to carry out power amplification in the described power-adjustable amplification module 220, when middle power mode, there is more manifold power amplification unit to be enabled to carry out power amplification in the described power-adjustable amplification module 220, when high-power mode, there is the most manifold power amplification unit to be enabled to carry out power amplification in the described power-adjustable amplification module 220.Like this, with respect to independently three power amplifier modules of the prior art, described power-adjustable amplification module 220 is multiplexing power amplification unit a lot.Therefore when realizing same three power modes, described power-adjustable amplification module 220 will take less area, and the cost of designing and developing simultaneously also can reduce.
From another aspect, when three different power modes, all adopted same power amplification path, be that radiofrequency signal RFIN is through obtaining radio frequency output signal RFOUT behind input matching circuit, power-adjustable amplification module and the output matching circuit, discontinuous phase hit between each pattern is very little like this, even do not have, communication quality can not be affected because pattern switches or affect very little.
In an improved embodiment, the power mode of described power-adjustable amplification module 200 can be designed as four, five even more, from the angle of designing and developing, only need to enable controlled power amplifying unit just passable of different numbers, therefore for the scheme of the power-adjustable amplification module in the utility model, increase power mode relatively simple a lot of for development and Design, development cost is lower.
Fig. 4 is the structured flowchart of the second embodiment 400 of the multimode power amplifier in the utility model.As shown in Figure 4, described multimode power amplifier 400 comprises input matching circuit 410, elementary power-adjustable amplification module 420, intervalve matching circuit 430, final stage power-adjustable amplification module 440 and output matching circuit 450.Compare with the multimode power amplifier 200 shown in Fig. 2, the structure that has adopted two stage power to amplify in the described multimode power amplifier 400 has namely adopted two-stage power-adjustable amplification module.Every grade of power-adjustable amplification module all includes a plurality of controlled power amplifying units, by enabling and disable part controlled power amplifying unit wherein, can adjust the entire gain of every grade of power-adjustable amplification module, thereby finally change the power mode of multimode power amplifier 400.From another angle, input matching circuit 410 also can be referred to as the front end match circuit of elementary power-adjustable amplification module 420, intervalve matching circuit 430 also can be referred to as the rear end match circuit of elementary power-adjustable amplification module 420, intervalve matching circuit 430 also can be referred to as the front end match circuit of final stage power-adjustable amplification module 440, output matching circuit 450 also can be referred to as the rear end match circuit of final stage power-adjustable amplification module 440.
In other embodiments, can also adopt more multistage power-adjustable amplification module, every grade of power-adjustable amplification module can be by enabling or disable power amplification unit is wherein adjusted self gain.
In a preferred embodiment, the input matching circuit in the described multimode power amplifier and output matching circuit can be designed to adjustable, with the different power mode of coupling power-adjustable amplification module.Have low such as the power-adjustable amplification module, in and Senior Three kind power mode, input matching circuit also is designed to low, in and Senior Three kind match pattern, output matching circuit also is designed to low, in and Senior Three kind match pattern, when the power-adjustable amplification module is low-power mode, input matching circuit and output matching circuit all are adjusted into low match pattern, accordingly, when the power-adjustable amplification module is middle power mode, input matching circuit and output matching circuit all are adjusted into middle match pattern, when the power-adjustable amplification module was high-power mode, input matching circuit and output matching circuit all were adjusted into high match pattern.Can realize like this exact matching of match circuit, obtain better performance.Also multiplexing a lot of match circuits unit between the different match pattern of described match circuit, part match circuit unit such as may use low match pattern when the middle match pattern time, part matching unit in the time of when high match pattern, may using middle match pattern, thus realize well taking.
The implication that links to each other or connect in the utility model not only comprises directly joins or connects, also comprises indirectly linking to each other or connecting, such as via continuous behind a resistance, the functional circuit.
Above the utility model has been carried out 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 utility model and scope, make change and all should belong to protection range of the present utility model.The utility model scope required for protection is limited by described claims, rather than limited by the foregoing description among the embodiment.
Claims (6)
1. multimode power amplifier, it is characterized in that, it comprises the power-adjustable amplification module with a plurality of power modes, the rear end match circuit that is connected in the front end match circuit of described power-adjustable amplification module front end and is connected in described power-adjustable amplification module rear end, the input radio frequency signal obtains exporting radiofrequency signal through front end match circuit, power-adjustable amplification module and rear end match circuit successively
Described power-adjustable amplification module carries out power amplification to the radiofrequency signal of input, described power-adjustable amplification module comprises a plurality of controlled power amplifying units, or/and the described controlled power amplifying unit of disable is adjusted the gain of described power-adjustable amplification module, and then so that described power-adjustable amplification module works in different power modes by enabling.
2. multimode power amplifier according to claim 1, it is characterized in that, the base stage of each controlled power amplifying unit is connected to each other rear input as the power-adjustable amplification module, the emitter grounding of each controlled power amplifying unit, the collector electrode of each controlled power amplifying unit is connected to each other rear output as the power-adjustable amplification module, and the bias voltage of the base stage by controlling each controlled power amplifying unit can enable the controlled power amplifying unit corresponding with disable.
3. multimode power amplifier according to claim 2 is characterized in that, when described power-adjustable amplification module worked in a power mode, it enabled a predetermined number controlled power amplifying unit, remaining controlled power amplifying unit of disable; When described power-adjustable amplification module worked in another power mode, it enabled another predetermined number controlled power amplifying unit, remaining controlled power amplifying unit of disable.
4. multimode power amplifier according to claim 3 is characterized in that, has at least the Partial Power amplifying unit namely to be enabled under therein a kind of power mode, is enabled under another kind of power mode again.
5. multimode power amplifier according to claim 3 is characterized in that, described front end match circuit and/or rear end match circuit are adjustable, to mate the different power mode of described power-adjustable amplification module.
6. mobile communication terminal, it comprises arbitrary described multimode power amplifier such as claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220279835 CN202737813U (en) | 2012-06-14 | 2012-06-14 | Multimode power amplifier and corresponding mobile communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220279835 CN202737813U (en) | 2012-06-14 | 2012-06-14 | Multimode power amplifier and corresponding mobile communication equipment |
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| Publication Number | Publication Date |
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| CN202737813U true CN202737813U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220279835 Withdrawn - After Issue CN202737813U (en) | 2012-06-14 | 2012-06-14 | Multimode power amplifier and corresponding mobile communication equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710224A (en) * | 2012-06-14 | 2012-10-03 | 无锡中普微电子有限公司 | Multi-mode power amplifier and corresponding mobile communication equipment |
| CN105099489A (en) * | 2015-07-27 | 2015-11-25 | 联想(北京)有限公司 | Radio frequency signal processing module, electronic equipment and radio frequency signal amplification method |
-
2012
- 2012-06-14 CN CN 201220279835 patent/CN202737813U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710224A (en) * | 2012-06-14 | 2012-10-03 | 无锡中普微电子有限公司 | Multi-mode power amplifier and corresponding mobile communication equipment |
| CN102710224B (en) * | 2012-06-14 | 2015-09-23 | 无锡中普微电子有限公司 | Multimode power amplifier and corresponding mobile communication equipment |
| CN105099489A (en) * | 2015-07-27 | 2015-11-25 | 联想(北京)有限公司 | Radio frequency signal processing module, electronic equipment and radio frequency signal amplification method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20150923 |
|
| RGAV | Abandon patent right to avoid regrant |