CN103178790A

CN103178790A - Multimode radio frequency amplifying device

Info

Publication number: CN103178790A
Application number: CN2012105747318A
Authority: CN
Inventors: 包剑文; 叶君青; 贾斌; 冯景航; 顾建忠
Original assignee: RF Micro Devices Inc
Current assignee: Qorvo US Inc
Priority date: 2011-12-26
Filing date: 2012-12-26
Publication date: 2013-06-26
Anticipated expiration: 2032-12-26
Also published as: CN103178790B

Abstract

The invention discloses a multimode radio frequency (RF) amplifying device and the operating method thereof. The RF amplifying device includes a plurality of RF amplifying stages, a bypass path and a control circuit. The cascades of the plurality of RF amplifying stages are coupled to amplify RF signals, and the control circuit is configured to enable and disable the bypass path. Based on any one of a first RF communication standard or a second RF communication standard, the RF signals are formatted. When the bypass path is enabled, the RF signals bypass one or more than one of the plurality of RF amplifying stages. Responding to the control input indicating any of a high-power mode or the first RF communication standard, the control circuit disables the bypass path. In order to improve the power efficiency, the control circuit, responding to the control input indicating both of a lower-power mode and the second RF communication standard, enables the bypass path.

Description

The multi-mode radio frequency amplifying device

Related application

The application requires in the rights and interests of the temporary patent application sequence number 61/580,280 of application on December 26th, 2011, and its whole disclosures are incorporated this paper by reference into.

Technical field

The disclosure relates generally to for the radio frequency in the front-end module of rf subscriber communicator (RF) amplifying device.

Background of invention

Traditional radio frequency (RF) front-end module amplifies radiofrequency signal according to different radio communication standard format with radio frequency amplifier in parallel substantially.For example, the multimode radio-frequency front end framework generally includes a plurality of radio frequency amplifiers in parallel and amplifies radiofrequency signal according to global system for mobile communications (GSM) standard format, and one or more power amplifier in parallel amplifies the radiofrequency signal according to TD SDMA (TD-SCDMA) standard format.Other RF front end structures can successfully amplify GSM form and TD-SCDMA form radiofrequency signal both with the common radio-frequency amplifier.These RF front-end modules have been saved great amount of cost, because do not need other power amplifiers.

It's a pity, these common radio-frequency amplifier architectures are suffering overpower consumption in the TD-SCDMA pattern, especially when low-power level amplifies.Particularly, compare with traditional TD-SCDMA power amplifier, much higher at the TD-SCDMA of back-off power level current drain.For the portable radio-frequency user communication device, and for providing the demand of the more small-sized battery of power, these portable radio-frequency user communication device day by day increase.Equally, in RF front-end module, especially in the power circuit such as radio frequency power amplifying device, power consumption is more and more important Consideration.

Therefore, need to be used for TD-SCDMA standard and GSM standard common radio-frequency amplifier both, when according to the TD-SCDMA standard, radiofrequency signal being formatd, it can provide in back-off power level the power consumption of reduction.

Brief summary of the invention

The disclosure relates to multi-mode radio frequency (RF) amplifying device and method of operation thereof.In one embodiment, radio frequency amplification apparatus has a plurality of radio frequency amplifying stages of cascade coupled.For example, a plurality of radio frequency amplifying stages comprise at least one initial radio frequency amplifying stage and a final radio frequency amplifying stage.Due to a plurality of radio frequency amplifying stage cascade coupled, so each in the radio frequency amplifying stage all can operate to provide the amplification to radiofrequency signal.

Yet radio frequency amplification apparatus comprises bypass path, and it can operate to be activated and to forbid.Bypass path is coupling between initial radio frequency amplifying stage and final radio frequency amplifying stage, thereby when enabling bypass path, by the bypass path received RF signal, and the final radio frequency amplifying stage of radiofrequency signal bypass.When the forbidding bypass path, final radio frequency amplifying stage provides the amplification to radiofrequency signal.Like this, although radio frequency amplifying stage cascade coupled can be enabled bypass path, thereby final radio frequency amplifying stage does not provide amplification.

In addition, radio frequency amplification apparatus has control circuit, and it is configured to receive control inputs.Whether described control inputs represents described radiofrequency signal to be formatd, and further represent high-power mode or low-power mode according to the first radio communication standard or the second radio communication standard.Described control circuit be configured in response to the expression low-power mode and according to the second radio communication standard with described radiofrequency signal format control inputs both, enable bypass path.Due to the final radio frequency amplifying stage of bypass, so when according to the second radio communication standard, described radiofrequency signal being formatd, consume at the back-off power level cpable of lowering power.

Control circuit further is configured to the control inputs in response to the expression high-power mode, the forbidding bypass path.Therefore, when according to the first radio communication standard, described radiofrequency signal being formatd and when according to the second radio communication standard, described radiofrequency signal being formatd, final radio frequency amplifying stage provides amplification in high-power mode.In addition, control circuit is configured in response to expression according to the control inputs of the first radio communication standard with described radiofrequency signal format, forbidding bypass path.Therefore, when control inputs represents high-power mode and when control inputs represents low-power mode, when according to the first radio communication standard, described radiofrequency signal being formatd, final radio frequency amplifying stage also provides amplification.

After reading the following specific embodiments and accompanying drawing of these preferred embodiments, person of skill in the art will appreciate that the scope of the present disclosure and recognize other aspects of the present disclosure.

The accompanying drawing summary

Contained within this specification and accompanying drawing that consist of the part of this specification has been set forth several aspects of the present disclosure, and is used from embodiment one and explains principle of the present disclosure.

Fig. 1 is the block diagram of an embodiment that comprises radio frequency (RF) amplifying device of a plurality of amplifying stages, a bypass path and a control circuit, wherein, coupling footpath, bypass footpath, thus when enabling bypass path, radiofrequency signal is the final radio frequency amplifying stage of bypass only;

Fig. 2 is the circuit diagram of an embodiment of the radio frequency amplification apparatus shown in Fig. 1;

Fig. 3 has set forth another embodiment of the radio frequency amplification apparatus that comprises a plurality of amplifying stages, a bypass path and a control circuit, wherein, coupling footpath, bypass footpath, thereby when enabling bypass path, by radio frequency amplifying stage in the middle of the radiofrequency signal bypass and final radio frequency amplifying stage;

Fig. 4 is the circuit diagram of the radio frequency amplification apparatus shown in Fig. 3, wherein, enables and forbid bypass path by the pair of switches in bypass path;

Fig. 5 is the circuit diagram of another embodiment of the radio frequency amplification apparatus shown in Fig. 3, wherein, throws (SPMT) switch by hilted broadsword more and enables and forbid bypass path;

Fig. 6 has set forth the laminated sheet of the radio frequency amplification apparatus shown in Fig. 5 and has arranged.

Specific embodiments

The following embodiment that proposes represents to allow those skilled in the art to put into practice the needed information of best mode that these embodiments are put into practice in these embodiments and elaboration.When reading following description by accompanying drawing, person of skill in the art will appreciate that concept of the present disclosure and recognize use not special these concepts of discussing herein.It should be understood that these concepts and application program are in the scope of the disclosure and accompanying drawing.

Disclose embodiment and the method for operation thereof of radio frequency (RF) amplifying device, this radio frequency amplification apparatus has a plurality of amplifying stages, a bypass path and a control circuit.Particularly, radio frequency amplification apparatus is configured to allow amplify radiofrequency signal with high power mode and low power mode.When according to the first radio communication standard, radiofrequency signal being formatd and when according to the second radio communication standard, radiofrequency signal being formatd, radio frequency amplification apparatus also allows to amplify.

The high-power mode of the high-power mode of the first radio communication standard and the Requirement of Spectrum of low-power mode and the second radio communication standard is obviously different with the Requirement of Spectrum of low-power mode.Generally, the opereating specification of a plurality of radio frequency amplifying stages can be and is in high-power mode and low-power mode the first radio communication standard both provides good power efficiency.The opereating specification of a plurality of radio frequency amplifying stages also can be generally the second radio communication standard that is in high-power mode good power efficiency is provided.Yet the opereating specification of a plurality of radio frequency amplifying stages provides good power efficiency for generally the second radio communication standard that is in low-power mode.

Equally, when radio frequency amplification apparatus was in low-power mode and according to the second radio communication standard, radiofrequency signal is formatd, bypass path allowed the one or more radio frequency amplifying stages of radiofrequency signal bypass.When enabling bypass path, the radiofrequency signal not opereating specification of the radio frequency amplifying stage of bypass is lower than the opereating specification of all radio frequency amplifying stages.When according to the second radio communication standard, radiofrequency signal being formatd, lower opereating specification allows to have good power efficiency in low-power mode.Control circuit is configured to control bypass path according to whether answering the one or more radio frequency amplifying stages of bypass or radio frequency amplifying stage whether amplification to radiofrequency signal should be provided.

Suppose that the first radio communication standard is global system for mobile communications (GSM) standard, and the specific embodiments of discussing in the disclosure is utilized and configured to the second radio communication standard when being TD SDMA (TD-SCDMA) standard particularly.Yet, it should be noted, these embodiments also can be used in other radio communication standards.For example, the first radio communication standard and/or the second radio communication standard also can be NMT (NMT) standard, high-speed packet access (HSPA) standard etc.In fact, the first radio communication standard and/or the second radio communication standard can be any one the radio communication standard in the set radio communication standard of electric wave industry meeting (ARIB), telecommunications industry solution alliance (ATIS), CCSA (CCSA), ETSI (ETSI), Telecommunications Technology Association (TTA), Telecommunication Technology Committee (TTC), third generation partnership projects (3GPP) etc.

Fig. 1 has set forth an embodiment of radio frequency amplification apparatus 10.Radio frequency amplification apparatus 10 comprises a plurality of radio frequency amplifying stages (be commonly referred to element 12, and specifically be called element 12A-12C) of cascade coupled.Therefore, each in a plurality of radio frequency amplifying stages 12 all can operate, and the amplification to radiofrequency signal 14 is provided.In other words, due to cascade coupled, so radio frequency amplifying stage 12 provides the amplification to radiofrequency signal 14 successively.

Radio frequency amplification apparatus 10 shown in Fig. 1 has initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C.Yet other embodiments of radio frequency amplification apparatus 10 can comprise any amount of radio frequency amplifying stage 12 more than or equal to 2.The radio frequency amplifying stage 12 of initial radio frequency amplifying stage 12A for beginning most in this sequence.Final radio frequency amplifying stage 12C is radio frequency amplifying stage 12 last in this sequence.Provide the radio frequency amplifying stage 12 of cascade at least due to two radio frequency amplifying stages 12 of needs, so radio frequency amplification apparatus 10 comprises initial at least radio frequency amplifying stage 12A and final radio frequency amplifying stage 12C.Yet the quantity of radio frequency amplifying stage 12 can be any integer more than or equal to 2.Equally, but at initially radio frequency amplifying stage 12A and the finally any amount of middle radio frequency amplifying stage of cascade coupled between radio frequency amplifying stage 12C, for example, middle radio frequency amplifying stage 12B.In the embodiment shown in Fig. 1, radio frequency amplification apparatus 10 has three radio frequency amplifying stages 12.Therefore, a middle radio frequency amplifying stage 12B cascade coupled is between initial radio frequency amplifying stage 12A and final radio frequency amplifying stage 12C.

Due to radio frequency amplifying stage 12 cascade coupled, so radio frequency amplifying stage 12 provides the amplification to radiofrequency signal 14 in order.Therefore, initial radio frequency amplifying stage 12A is at first according to amplifier gain G _InitiallyAmplification to radiofrequency signal 14 is provided.In case initial radio frequency amplifying stage 12A is according to amplifier gain G _InitiallyAmplify radiofrequency signal 14, so middle radio frequency amplifying stage 12B is according to amplifier gain G _MiddleAmplify radiofrequency signal 14.In case middle radio frequency amplifying stage 12B is according to amplifier gain G _MiddleAmplify radiofrequency signal 14, so final radio frequency amplifying stage 12C is according to amplifier gain G _FinallyAmplify radiofrequency signal 14.The amplifier gain of a plurality of radio frequency amplifying stage 12 polymerizations can be described as G equally, generally _Initially* G _Middle* G _Finally

In the particular shown in Fig. 1, initial radio frequency amplifying stage 12A has input terminal 16A and outlet terminal 18A.Middle radio frequency amplifying stage 12B has input terminal 16B and outlet terminal 18B.Final radio frequency amplifying stage 12C has input terminal 16C and outlet terminal 18C.For term " terminal ", terminal represents to be configured to input and/or export any element or any set of pieces of radiofrequency signal.For example, in Fig. 1, radio frequency amplification apparatus 10 is illustrated as received RF signal 14, as single-ended signal.Therefore,

input terminal

16A, 16B, 16C and

outlet terminal

18A, 18B, 18C all can be single-ended terminal or node.Yet, in other embodiments, but received RF signal 14, as differential signal.In this embodiment,

input terminal

16A, 16B, 16C and

outlet terminal

18A, 18B, 18C all can be a pair of terminal or node, are configured to receive and/or send differential signal.

Radio frequency amplification apparatus 10 shown in Fig. 1 comprises input terminal 20, comes received RF signal 14 from the radio circuit of upstream.The be coupled input terminal 16A of initial radio frequency amplifying stage 12A comes received RF signal 14 from input terminal 20.Radio frequency amplification apparatus 10 shown in Fig. 1 also has outlet terminal 22.The outlet terminal 18C of final radio frequency amplifying stage 12C and outlet terminal 22 couplings, thus after the radio circuit that amplifies the downstream, provide radiofrequency signal 14.As a result, cascade coupled radio frequency amplifying stage 12 between input terminal 20 and outlet terminal 22.

For according to amplifier gain G _InitiallyAmplify radiofrequency signal 14, initial radio frequency amplifying stage 12A is at input terminal 16A received RF signal 14.In case initial radio frequency amplifying stage 12A is according to amplifier gain G _InitiallyAmplification to radiofrequency signal 14 is provided, and so initial radio frequency amplifying stage 12A just sends radiofrequency signal 14 from outlet terminal 18A.Then, by the input terminal 16B received RF signal 14 of middle radio frequency amplifying stage 12B.In case middle radio frequency amplifying stage 12B is according to amplifier gain G _MiddleAmplification to radiofrequency signal 14 is provided, and so middle radio frequency amplifying stage 12B just sends radiofrequency signal 14 from outlet terminal 18B.Then, final radio frequency amplifying stage 12C is at input terminal 16C place received RF signal 14, and according to amplifier gain G _FinallyAmplify radiofrequency signal 14.In case final radio frequency amplifying stage 12C is according to amplifier gain G _FinallyAmplify radiofrequency signal 14, so final radio frequency amplifying stage 12C sends radiofrequency signal 14 from outlet terminal 18C.Then, can radiofrequency signal 14 be sent to the downstream radio circuit by outlet terminal 22.

For amplifying power is provided, each radio frequency amplifying stage 12 all receives supply power voltage V _{Power supply}Then, each radio frequency amplifying stage 12 is according to its amplifier gain G separately _Initially, G _Middle, and G _FinallyWith supply power voltage V _{Power supply}The power delivery that provides is to radiofrequency signal 14.Yet, being noted that when radiofrequency signal 14 is passed this sequence, each radio frequency amplifying stage 12 is all processed larger quantity of power.Therefore, due to received RF signal before amplifying power 14 and send only according to amplifier gain G _InitiallyThe radiofrequency signal 14 of amplifying, initial radio frequency amplifying stage 12A processes minimum quantity of power.When middle radio frequency amplifying stage 12B received RF signal 14, amplifier gain G _InitiallyAmplified radiofrequency signal 14.Middle radio frequency amplifying stage 12B is further according to amplifier gain G _MiddleAmplify radiofrequency signal 14.Therefore, middle radio frequency amplifying stage 12B sends according to amplifier gain G _Initially* G _MiddleThe radiofrequency signal 14 of amplifying.As a result, the quantity of power in the middle of middle radio frequency amplifying stage 12B processes.Final radio frequency amplifying stage 12C receives the amplifier gain G according to polymerization _Initially* G _MiddleThe radiofrequency signal 14 of amplifying.Equally, as final radio frequency amplifying stage 12C further by amplifier gain G _FinallyWhen amplifying radiofrequency signal 14, final radio frequency amplifying stage 12C sends the amplifier gain G according to polymerization _Initially* G _Middle* G _FinallyThe radiofrequency signal 14 of amplifying.Equally, the maximum power of final radio frequency amplifying stage 12C processing.

Each radio frequency amplifying stage 12 all is configured to provide amplification, thereby can process suitable power level.For example, radio frequency amplifying stage 12 can comprise the suitable radio frequency amplifier element of transistor, transistor network, operational amplifier and/or any other type.Usually, initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B are classified as " driver " radio frequency amplifying stage 12.In certain embodiments, each driver radio frequency amplifying stage 12 can have single transistor or pair of transistor, and amplification is provided.Yet, because final radio frequency amplifying stage 12C processes maximum power, so some embodiment of final radio frequency amplifying stage 12C can comprise a series of transistors or a large amount of transistor, in order to process the visible power level of final radio frequency amplifying stage 12C.

Referring to Fig. 1, radio frequency amplification apparatus 10 comprises bypass path 24 again, and this bypass path can operate, and is activated and forbids.In this specific embodiment, bypass path 24 has switch 26, and it is configured to be disconnected and is closed.When Closing Switch 26, enable bypass path 24.On the contrary, when cut-off switch 26, forbidding bypass path 24.Bypass path 24 is coupling between initial radio frequency amplifying stage 12A and final radio frequency amplifying stage 12C, thereby when enabling bypass path 24, radiofrequency signal 14 is received by bypass path 24, and the radiofrequency signal 14 final radio frequency amplifying stage of bypass 12C.In the embodiment shown in Fig. 1, bypass path 24 is connected between middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C, thereby when enabling bypass path 24, radiofrequency signal 14 is the final radio frequency amplifying stage of bypass 12C only.Equally, when Closing Switch 26, final radio frequency amplifying stage 12C does not amplify radiofrequency signal 14, but radiofrequency signal 14 is received and sent from outlet terminal 28 by bypass path 24.In this case, from only according to the amplifier gain G of initial radio frequency amplifying stage 12A _InitiallyAmplifier gain G with middle radio frequency amplifying stage 12B _MiddleSend this radiofrequency signal 14 in the outlet terminal 28 that amplifies.Therefore, when enabling bypass path 24, send radiofrequency signal 14 from outlet terminal 28, its power level is than lower when sending radiofrequency signal 14 from the outlet terminal 18C of final radio frequency amplifying stage 12C.

In order to enable and forbid bypass path 24, radio frequency amplification apparatus 10 has control circuit 30.Control circuit 30 is configured to receive control inputs 32, and this control inputs represents according to the first radio communication standard or the second radio communication standard, radiofrequency signal 14 to be formatd.As mentioned above, for the particular of discussing in the disclosure, comprise that radio frequency amplification apparatus 10, the first radio communication standards shown in Fig. 1 are GSM standard, the second radio communication standard is the TD-SCDMA standard.Yet in other embodiments, the first radio communication standard can be the suitable radio communication standard of any type, and the second radio communication standard can be the suitable radio communication standard of any other type.

Control inputs 32 is expression high-power mode or low-power mode further.Equally, control inputs 32 can be a control signal or one group of control signal, expression according to GSM standard or according to the TD-SCDMA standard with radiofrequency signal 14 format, and this control inputs can operate, and further represents high-power mode or low-power mode.The below can make an explanation in further detail, and control inputs 32 also can represent the operator scheme of other types.Under any circumstance, the high-power mode of GSM standard all has the power requirement different with low-power mode from the high-power mode of TD-SCDMA standard with low-power mode.

Substantially, and compare during with the TD-SCDMA standard when control inputs 32 expression high-power modes, when control inputs 32 expression GSM standard and high-power mode, need higher power amplification.Yet, no matter control inputs 32 represents high-power mode or low-power modes, and initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C all can be configured to effectively process the power delivery of radiofrequency signal 14 in GSM standard.Initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C also can be in the TD-SCDMA standard power delivery in the handle high power pattern effectively.

When control inputs 32 expression TD-SCDMA signals had low-power mode, radio frequency amplifying stage 12 can not provide effective power delivery in these back-off power level generally.Equally, control circuit 30 is configured in response to expression low-power mode and expression according to the TD-SCDMA standard radiofrequency signal 14 format control inputs 32 is both enabled bypass path 24.Like this, the final radio frequency amplifying stage of bypass 12C, and only initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B provide amplification to radiofrequency signal 14.Due to when TD-SCDMA is in low-power mode, initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B can be effectively with power delivery to radiofrequency signal 14, so this can significantly improve power efficiency.

Control circuit 30 is configured to forbid bypass path 24 in response to representing according to the control inputs 32 of GSM standard with radiofrequency signal 14 formats.This is because no matter control inputs 32 represents high-power mode or low-power modes, when according to GSM standard during with radiofrequency signal 14 format, can both have and need in some cases initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C.

In addition, control inputs 30 further is configured to the control inputs 32 in response to the expression high-power mode, forbidding bypass path 24.This be because no matter according to GSM standard or according to the TD-SCDMA standard with radiofrequency signal 14 formats, initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C generally can both be effectively with power delivery to radiofrequency signal 14.As a result, control inputs 30 is configured to increase one or more power in a plurality of radio frequency amplifying stages 12, thereby in response to the control inputs 32 that represents high-power mode, increases to the power delivery of radiofrequency signal 14.Yet when control inputs 32 expression TD-SCDMA standard, the amplification of power is less.

In response to the control inputs 32 that represents that low-power mode and expression are formatd radiofrequency signal 14 both according to GSM standard, control circuit 30 is configured to reduce the power of one or more amplifying stages in a plurality of radio frequency amplifying stages 12, thereby reduces to the power delivery of radiofrequency signal 14.

In order to reduce the power of one or more amplifying stages in a plurality of radio frequency amplifying stages 12, other control circuit of control circuit 30 or certain can be configured to reduce supply power voltage V _{Power supply}The supply power voltage level.In order to improve power, other control circuit of control circuit 30 or certain can be configured to improve supply power voltage V _{Power supply}The supply power voltage level.The below can explain in further detail, in other embodiments, control circuit 30 (perhaps certain other control circuits) can be configured to reduce one or more bias currents, in order to reduce power, and increase one or more bias currents, in order to improve power.Other embodiments can be carried out certain combination to following: improve and reduce supply power voltage V _{Power supply}Supply power voltage level and/or reduction or improve one or more bias currents.On the contrary, as mentioned above, in response to the control inputs 32 that represents that low-power mode and expression are formatd radiofrequency signal 14 both according to the TD-SCDMA standard, bypass path 24 is enabled in control circuit 30 configurations.Therefore, when control inputs 32 represents that low-power modes and TD-SCDMA format both, by the final radio frequency amplifying stage of bypass 12C, be reduced to the power delivery of radiofrequency signal 14, and do not reduce the power (perhaps except the power that reduces radio frequency amplifying stage 12, also reducing the power that is transferred to radiofrequency signal 14) of radio frequency amplifying stage 12.

In order to enable and forbid bypass path 24, control circuit 30 is configured to generate switch controlling signal 34, and this signal operates in state of activation and unactivated state.Switch 26 is configured to receiving key control signal 34 from control circuit 30.Switch 26 is in response to the switch controlling signal 34 that operates in state of activation, thus Closing Switch 26 and enable bypass path 24.On the contrary, switch 26 is in response to the switch controlling signal 34 that operates in unactivated state, thus cut-off switch 26 and forbidding bypass path 24.

Fig. 2 has set forth the exemplary circuit diagram of an embodiment of the radio frequency amplification apparatus 10 described in top Fig. 1.In this exemplary circuit diagram, each radio frequency amplifying stage 12 has a transistor and (is commonly referred to element Q, and specifically is called element Q _A-Q _C).Each transistor Q is bipolar junction transistor (BJT), and each radio frequency amplifying stage 12 has the configuration of gatherer follower.Control circuit 30 shown in Fig. 2 comprises decoder 36, biasing networks 38 and switch control network 40.In this embodiment, control inputs 32 is control word, and decoder 36 is configured to control inputs 32 is converted into the internal control signal of controlling biasing networks 38 and switch control network 40.

Biasing networks 38 generates bias current 42, bias current 44 and bias current 46.At transistor Q _ABase stage, bias current 42 is used for radiofrequency signal 14, so that radiofrequency signal 14 is placed in transistor Q _AOpereating specification in.Transistor Q _AGatherer and transistor Q _BBase stage coupling, after radio frequency amplifying stage 12B in the middle of being enlarged into from initial radio frequency amplifying stage 12A, send radiofrequency signal 14.At transistor Q _BBase stage, bias current 44 is used for radiofrequency signal 14, in order to radiofrequency signal 14 is placed in transistor Q _BOpereating specification in.Transistor Q _BGatherer and transistor Q _CBase stage coupling, in order to radiofrequency signal 14 is sent in final radio frequency amplifying stage 12C from middle radio frequency amplifying stage 12B.At transistor Q _CBase stage, use bias current 46, in order to radiofrequency signal 14 is placed in transistor Q _COpereating specification in.In case by transistor Q _CAmplify, so just with radiofrequency signal 14 from transistor Q _CGatherer in send in other circuit.

Undoubtedly, suppose to forbid bypass path 24 and cut-off switch 26.Switch 26 shown in Fig. 2 is field-effect transistor (FET), and is especially N-type FET.Switch is controlled network 40 and is generated switch controlling signal 34, so that console switch 26.Therefore, in this embodiment, the voltage level of switch controlling signal 34 is enough high, thereby when the grid of switch 26 and the voltage between source electrode during higher than threshold voltage, switch controlling signal 34 is in state of activation.On the contrary, the voltage level of switch controlling signal 34 is enough low, thereby when the grid of switch 26 and the voltage between source electrode during lower than threshold voltage, switch controlling signal 34 is in unactivated state.Yet, be noted that switch control network 40 also generates second switch control signal 48, another switch 50 of this signal operation.This switch 50 and transistor Q _CGatherer coupling.Therefore, when switch controlling signal 34 is in unactivated state, second switch control signal 48 Closing Switch 50 that operate in state of activation (also being FET).Like this, fully isolate between bypass path 24 and final radio frequency amplifying stage 12C, thereby in bypass path and final radio frequency amplifying stage, the source impedance of each can mate with load impedance.

When forbidding bypass path 24, final radio frequency amplifying stage 12C provides the amplification to radiofrequency signal 14.Therefore, when forbidding bypass path 24, cut-off switch 26 and Closing Switch 50.The first rf filtering circuit 52 and final radio frequency amplifying stage 12C coupling, thus radiofrequency signal 14 is sent in the first rf filtering circuit 52 from final radio frequency amplifying stage 12C.More specifically, the first rf filtering circuit 52 and transistor Q shown in Fig. 2 _CGatherer connect, in case with transistor Q _CAmplified radiofrequency signal, the first rf filtering circuit is with regard to received RF signal 14 so.Configure the first rf filtering circuit 52, thereby when forbidding bypass path 24, the first source impedance that provides from final radio frequency amplifying stage 12C and the first load impedance approximate match that offers final radio frequency amplifying stage 12C.In the specific embodiments shown in Fig. 2, from transistor Q _CGatherer in the first source impedance is provided.The first load impedance is offered transistor Q _CGatherer.In other words, the first source impedance equates with the impedance of all circuit before outlet terminal 18C when enabling switch 50, and the first load impedance is the impedance of all circuit after outlet terminal 18C when enabling switch 50.The circuit direction of the first source impedance and the circuit direction of determining the first load impedance at outlet terminal 18C are determined in designator 54 expressions.

The first rf filtering circuit 52 provides suitable impedance transformation, thereby is provided to the first source impedance and the first load impedance approximate match that is provided in outlet terminal 18C in outlet terminal 18C from final radio frequency amplifying stage 12C.Which kind of degree closely the first source impedance need to match with first load impedance at outlet terminal 18C place, and this depends on Requirement of Spectrum and the power efficiency requirement of application-specific.

Undoubtedly, when enabling bypass path 24, load impedance is different with source impedance.Therefore, as shown in Figure 2, bypass path 24 comprises the second rf filtering circuit 56.Along bypass path 24 coupling the second rf filtering circuit 56, thereby when enabling bypass path 24, received RF signal 14.Configure the second rf filtering circuit 56, thereby when enabling bypass path 24, be provided to second source impedance and the second load impedance approximate match that is provided in a plurality of radio frequency amplifying stages 12 in bypass path 24 from a plurality of radio frequency amplifying stages 12 from bypass path 24.

Be noted that due to bypass path 24 be connected radio frequency amplifying stage 12C and both finally be connected with same load, so if switch 50 is not provided, the second source impedance that offers so bypass path 24 is subject to the very large impact of final radio frequency amplifying stage 12C.Carry out under these conditions impedance matching and basically do not gear to actual circumstances, perhaps much more difficult at least.Yet, by switch 50 is provided, solved this problem.When Closing Switch 26, but cut-off switch 50, thus producing impedance by final radio frequency amplifying stage 12C, this impedance is similar in fact the open circuit when cut-off switch 50.

When enabling bypass path 24, mark 58 and 60 expressions are used for determining offering the second source impedance of bypass path 24 and are provided to the circuit direction of the second load impedance a plurality of radio frequency amplifying stages 12 from bypass path 24.More specifically, the second source impedance is the impedance towards the outlet terminal 18B place of power measurement, is shown by mark 58.When enabling bypass path 24, the second load impedance is provided to from bypass path 24 in middle radio frequency amplifying stage 12B.More specifically, when the second load impedance when enabling bypass path 24, towards load in the visible impedance in outlet terminal 18B place, by mark 60 demonstrations.The second rf filtering circuit 56 provides suitable impedance transformation, thus second source impedance and the second load impedance approximate match.Which kind of degree closely the second load impedance and second source impedance need to match, and this depends on Requirement of Spectrum and power efficiency requirement.In the radio frequency amplification apparatus 10 shown in Fig. 2, bypass path 24 is coupling between middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C.Equally, when enabling bypass path 24, the second source impedance is offered bypass path 24 from middle radio frequency amplifying stage 12B.Equally, when enabling bypass path 24, the second load impedance is provided to from bypass path 24 in middle radio frequency amplifying stage 12B.

For the biasing networks 38 shown in Fig. 2, when control inputs 32 represented that high-power modes and GSM standard are both, biasing networks 38 provided the

bias current

42,44 and 46 with maximum level.If control inputs 32 expression high-power mode and TD-SCDMA standards of both, biasing networks 38 reduces each bias current 42,44 and 46 bias current level so.When control inputs 32 expression low-power modes and GSM standard both the time, further reduce each bias current 42,44 and 46 bias current level.Yet, if control inputs 32 expression low-power mode and TD-SCDMA standards of both by Closing Switch 26, are enabled bypass path 24 so.And, owing to not providing amplification with final radio frequency amplifying stage 12C bypass and this final radio frequency amplifying stage, thus closing bias electric current 46, to forbid final radio frequency amplifying stage 12C.And, in order further to reduce power consumption, reduce

bias current

42,44 both.Like this, radio frequency amplification apparatus 10 does not consume extra and unwanted power.

Fig. 3 has set forth another embodiment of radio frequency amplification apparatus 62.Except bypass path 64, the radio frequency amplification apparatus 62 shown in Fig. 3 is roughly the same with the radio frequency amplification apparatus 10 shown in Fig. 1.Similar to the bypass path 24 shown in Fig. 1, bypass path 64 is coupling between initial radio frequency amplifying stage 12A and final radio frequency amplifying stage 12C, thereby when enabling bypass path 64, radiofrequency signal 14 is received and the radiofrequency signal 14 final radio frequency amplifying stage of bypass 12C by bypass path 64.And similar to the bypass path 24 shown in Fig. 1, bypass path 64 is coupling between initial radio frequency amplifying stage 12A and final radio frequency amplifying stage 12C, thereby when forbidding bypass path 64, final radio frequency amplifying stage 12C provides the amplification to radiofrequency signal 14.At last, as described in the bypass path 24 as shown in top Fig. 1, bypass path 64 comprises switch 26, disconnects and closed this switch, with forbidding with enable bypass path 64.

Yet different from the bypass path 24 shown in Fig. 1, the bypass path 64 shown in Fig. 3 is coupling between initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B.Equally, the bypass path 64 that also is coupled, thereby when enabling bypass path 64, radio frequency amplifying stage 12B in the middle of the further bypass of radiofrequency signal 14 (and final radio frequency amplifying stage 12C).And, because bypass path 64 is coupling between middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C, thus coupling bypass path 64, thus when only in forbidding bypass path 64, middle radio frequency amplifying stage 12B provides the amplification to radiofrequency signal 14.Therefore, in this embodiment of radio frequency amplification apparatus 62, when enabling bypass path 64, only initial radio frequency amplifying stage 12A provides the amplification to radiofrequency signal 14.

Be coupling in due to bypass path 64 between the input terminal 16B of the outlet terminal 18A of initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B, so when enabling bypass path 64, after only amplifying radiofrequency signal 14 by initial radio frequency amplifying stage 12A, bypass path 64 is configured to receive this radiofrequency signal.Therefore, bypass path 64 receives according to amplifier gain G _InitiallyThe radiofrequency signal 14 of amplifying.In addition, when enabling bypass path 64, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C do not amplify radiofrequency signal 14.Yet when forbidding bypass path 64, all radio frequency amplifying stages 12 provide the amplification to radiofrequency signal 14.Therefore, when forbidding bypass path 64, from the amplifier gain G according to polymerization _Initially* G _Middle* G _FinallySend radiofrequency signal 14 in the outlet terminal 18C that amplifies.

Fig. 4 is the circuit diagram of an exemplary embodiment of the radio frequency amplification apparatus 62 shown in Fig. 3.Except bypass path 64, radio frequency amplification apparatus 62 is similar to the radio frequency amplification apparatus 10 described in the circuit diagram shown in Fig. 2.Therefore, bypass path 64 connects between initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B, thus received RF signal 14.And, be noted that bypass path 64 comprises another one switch 66.When enabling bypass path 64, Closing Switch 66 and switch 26 both and during bypass path 64, disconnect this two switches when forbidding.Therefore, switch is controlled network 40 and is generated another one switch controlling signal 68, and this signal is in state or the unactivated state of activation, thereby disconnects and Closing Switch 66.This just allows protection radio frequency amplifying stage 12 away from the transient state power surge that produces when enabling and forbid bypass path 64.The time of disconnection and Closing Switch 26, switch 66 and switch 50 can be synchronous, thereby protection radio frequency amplifying stage 12 is away from these power surge.

For the high-power mode of the low-power mode of the high-power mode of GSM form, GSM form and TD-SCDMA form, biasing networks 38 be configured to by with above-mentioned Fig. 2 in identical mode bias current 42, bias current 44 and bias current 46 are provided.Yet in the radio frequency amplification apparatus 62 shown in Fig. 4, biasing networks 38 stops bias current 44 is sent to middle radio frequency amplifying stage 12B in response to expression TD-SCDMA form and low-power mode control inputs 32 both.Therefore, in the low-power mode of TD-SCDMA form, biasing networks 38 stops providing bias current 44 and bias current 46 both.Equally, when enabling bypass path 64, in the middle of forbidding, radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C are both.Therefore, due to when enabling bypass path 64, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C do not provide amplification, so this just allows to have higher power efficiency.

For impedance matching is provided, the first rf filtering circuit 52 provides impedance transformation, with by with above-mentioned Fig. 2 in identical mode at outlet terminal 18C place's coupling the first source impedance and the first load impedance.Yet in Fig. 4, bypass path 64 is coupling between initial radio frequency amplifying stage 12A and middle radio frequency amplifying stage 12B, and when enabling bypass path 64, radio frequency amplifying stage 12B in the middle of the further bypass of radiofrequency signal 14.Therefore, the second source impedance is provided in bypass path 64 from initial radio frequency amplifying stage 12A.More specifically, in outlet terminal 18A place was provided to bypass path 64 with the second source impedance from initial radio frequency amplifying stage 12A, this was by mark 70 expressions shown in Fig. 4.The second load impedance is provided to from bypass path 64 in initial radio frequency amplifying stage 12A.More specifically, at outlet terminal 18A place, the second load impedance is provided to from bypass path 64 in initial radio frequency amplifying stage 12A, this is by mark 72 expressions in Fig. 4.

Configure the second rf filtering circuit 56, in order to the impedance transformation with second source impedance and the second load impedance approximate match is provided.When enabling bypass path 64, the second source impedance is offered bypass path 64, and provide the second load impedance from bypass path 64.In addition, when forbidding bypass path 64, cut-off switch 26 and switch 66, and bypass path 64 provides very high impedance (theory unlimited is large).Therefore, in Fig. 4, when enabling bypass path 64, the impedance transformation that the second rf filtering circuit 56 provides be provided to the second source impedance in bypass path 64 and be provided to the second load impedance approximate match in initial radio frequency amplifying stage 12A from initial radio frequency amplifying stage 12A from bypass path 64

Fig. 5 is the circuit diagram of another embodiment of the radio frequency amplification apparatus 62 shown in Fig. 3.Radio frequency amplification apparatus 62 shown in Fig. 5 does not comprise the

switch

26,50,66 shown in Fig. 3 and Fig. 4.Exactly, the radio frequency amplification apparatus shown in Fig. 5 62 comprises that hilted broadsword throws (SPMT) switch 74 more.When sending radiofrequency signal 14 from final radio frequency amplifying stage 12C, SPMT switch 74 has a terminal 76, connects, with received RF signal 14.SPMT switch 74 also comprises a terminal 78, connects, with received RF signal 14 from bypass path 64.At last, SPMT switch 74 has a terminal 80, and this terminal is configured to be connected with antenna 82, and in the example described in Fig. 5, is connected with antenna 82.

Control circuit 30 shown in Fig. 5 also comprises switch decoder 83.Switch decoder 83 controls according to control inputs 32 which

terminal

76,78 is connected to terminal 80.In this embodiment, according to the control inputs 32 of GSM standard with radiofrequency signal 14 formats, by connecting terminal 76 and terminal 80, switch decoder 83 is configured to operate SPMT switch 74 in response to expression, with forbidding bypass path 64.In response to the control inputs 32 of expression high-power mode, by connecting terminal 76 and terminal 80, switch decoder 83 also is configured to operate SPMT switch 74, with forbidding bypass path 64.Therefore, if control inputs 32 represents any in GSM patterns and/or high-power mode or both, switch decoder 83 is forbidden bypass path 64 so.On the other hand, radiofrequency signal 14 is formatd and expression low-power mode control inputs 32 both according to the TD-SCDMA standard in response to expression, by connecting terminal 78 and terminal 80, switch decoder 83 is configured to operate SPMT switch 74, to enable bypass path 64.Like this, when forbidding bypass path 64 and when enabling bypass path 64, the radiation-curable radiofrequency signal 14 of antenna 82.

It should be noted, in other embodiments of radio frequency amplification apparatus 62, can provide the switch 26 shown in Fig. 4,66 and 50 and Fig. 5 shown in SPMT switch 74.Therefore control circuit 30 can comprise the switch decoder 83 shown in the switch control network 40 shown in Fig. 4 and Fig. 5.And, it should be noted, in other embodiments of the radio frequency amplification apparatus 10 shown in Fig. 1 and Fig. 2, can use SPMT switch 74, to forbid and to enable bypass path 24.

Referring to Fig. 5, control circuit 30 also comprises power control network 84 again.Power is controlled network 84 and is configured to receive supply voltage V _{Power supply}, for example, cell voltage, and to generate supply power voltage V _{Power supply}Supply voltage V no matter _{Power supply}Mains voltage level whether fluctuate, power is controlled network 84 and is all guaranteed suitably to keep supply power voltage V _{Power supply}The supply power voltage level.In this embodiment, can provide the supply power voltage level, thus constant, and perhaps this mains voltage level can change, so that envelope-tracking to be provided.Therefore, radio frequency amplification apparatus 62 can be processed the various multiplexing schemes of radiofrequency signal 14.For example, in the radio communication standard, can have a plurality of different radio communication standards.These radio communication standards can be provided, be used for different radio communication bands.And, because each in these different radio communication standards all used different multiplexing schemes, so the certain specification in these radio communication standards can be overlapping with other radio communication standards in same radio communication standard.High band pattern and low-frequency range pattern are available or unavailable in these different radio communication standards.

When according to GSM standard, during with radiofrequency signal 14 format, any one standard in first group of radio communication standard that the control inputs 32 shown in Fig. 5 can further represent to provide according to GSM standard further formats radiofrequency signal 14.First group of radio communication standard can comprise at least one enhanced data GSM evolution (EDGE) standard.High-power mode is relevant to the EDGE standard with low-power mode.In this embodiment, first group of radio communication standard providing of GSM standard comprises EDGE 1800 standards and EDGE 1900 standards.EDGE 1800 standards and EDGE 1900 standards both in, data are encoded in both in amplitude and phase place, this needs radio frequency amplifying stage 12 to provide linear (classification A) to amplify, thereby by minimum distortion with power delivery to radiofrequency signal 14.Also can provide bias current 42,44 and 46, thereby radio frequency amplifying stage 12 carries out linear operation.In addition, supply power voltage V _{Power supply}The supply power voltage level-variable, so that envelope-tracking to be provided.Therefore, with respect to the time, with amplifier gain G _Initially, G _Middle, G _FinallyAnd/or the amplifier gain G of polymerization _Initially* G _Middle* G _FinallyKeep constant.

In the TD-SCDMA standard, radiofrequency signal 14 is also encoded data in both in amplitude and phase place, and therefore, also provides bias current 42,44 and 46, carries out linear operation to impel radio frequency amplifying stage 12.In addition, supply power voltage V _{Power supply}The supply power voltage level-variable, so that envelope-tracking to be provided.High-power mode is also relevant to the TD-SCDMA standard with low-power mode.Therefore, with respect to the time, with amplifier gain G _Initially, G _Middle, G _FinallyAnd/or the amplifier gain G of polymerization _Initially* G _Middle* G _FinallyKeep constant.

In addition, in GSM standard, initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C all provide amplification.Control circuit 30 is configured to increase the power of radio frequency amplifying stage 12, thereby in response to any control inputs 32 both in expression high-power mode and EDGE1800 standard or EDGE 1900 standards, increases to the power delivery of radiofrequency signal 14.Control circuit 30 also is configured to reduce the power of radio frequency amplifying stage 12, thereby in response to the expression low-power mode and according to any in EDGE 1800 standards or EDGE 1900 standards with radiofrequency signal 14 format control inputs 32 both, be reduced to the power delivery of radiofrequency signal 14.In this example, power is controlled network 84 and is configured to be supply power voltage V in response to any the control inputs 32 in expression low-power mode and EDGE 1800 standards or EDGE 1900 standards _{Power supply}Lower dc offset voltage level is provided.Like this, when in any in EDGE 1800 standards that are being in high-power mode and low-power mode GSM standard both or EDGE 1900 standards during with radiofrequency signal 14 format, all radio frequency amplifying stages 12 can provide amplification.

As mentioned above, in the TD-SCDMA standard, the amplitude of radiofrequency signal 14 and phase place both in, also information is encoded.When control inputs 32 expression high-power modes and TD-SCDMA standards of both, all radio frequency amplifying stages 12 provide amplification.Yet, if control inputs 32 expression low-power mode and TD-SCDMA standards of both are enabled bypass path 64 so.Therefore, radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C in the middle of radiofrequency signal 14 bypass.Due to radio frequency amplifying stage 12B in the middle of not using and final radio frequency amplifying stage 12C, so biasing networks 38 does not provide bias current 44,46.This is forbidding middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C just.Bias current 42 and/or supply power voltage V are provided _{Power supply}The supply power voltage level, thereby initial radio frequency amplifying stage 12A carries out linear operation.The linear operation scope of initial radio frequency amplifying stage 12A itself is well below the linear operation scope of the radio frequency amplifying stage 12 of all polymerizations.Therefore, when enabling bypass path 64, can only amplify radiofrequency signal 14 by initial radio frequency amplifying stage 12A.Only the linear operation scope of initial radio frequency amplifying stage 12A is enough low, with at the low-power mode that is used for the TD-SCDMA standard, amplifies radiofrequency signal 14 with back-off power level, has larger power efficiency.

Except EDGE 1800 standards and EDGE 1900 standards, first group of radio communication standard of GSM standard can further comprise digital communication system (DCS) standard and Personal Communications Services (PCS) standard.When according to DCS standard and PCS standard during with radiofrequency signal 14 format, in the phase place of this signal, fully with data encoding.In other words, DCS standard and PCS standard are both constant envelope standard, and these standards are insensitive to amplitude non-linearity.Amplifier gain G _Initially, G _Middle, G _FinallyAnd/or the amplifier gain G of polymerization _Initially* G _Middle* G _FinallyTherefore can be along with the time changes.

High-power mode and low-power mode and DCS standard are uncorrelated with the PCS standard.Exactly, operation radio frequency amplifying stage 12 is so that near saturated.Yet, because DCS standard and PCS standard are in GSM standard, so when according to DCS standard or PCS standard during with radiofrequency signal 14 format, forbidding bypass path 64.Equally, when control inputs 32 expression DCS standards or PCS standard, initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C all provide the amplification to radiofrequency signal 14.Therefore, DCS standard and PCS standard are constant envelope standard.Yet, give supply power voltage V _{Power supply}The supply power voltage level power is provided, until during near saturated supply power voltage level, it should be noted, need to satisfy burst mask standard.Can regulate supply power voltage level and/or bias current 42,44,46, in order to satisfy burst mask standard.

Fig. 6 is that the laminated sheet of an embodiment of the radio frequency amplification apparatus 62 shown in Fig. 5 is arranged.Radio frequency amplification apparatus 62 shown in Fig. 6 is positioned on laminated substrates 86.Can be from laminated sheet, for example FR-1, FR-2, FR-3, FR-4, FR-5, FR-6, CEM-1, CEM-2, CEM-3, CEM-4, CEM-5, CX5, CX10, CX20, CX30, CX40, CX50, CX60, CX70, CX80, CX90, CX100 etc., form laminated substrates 86.Can be provided by the metal level in laminated substrates 86 and connect and transmission path.Initial radio frequency amplifying stage 12A, middle radio frequency amplifying stage 12B and final radio frequency amplifying stage 12C all are formed on Semiconductor substrate 88.Any suitable Semiconductor substrate technology can be used for providing Semiconductor substrate 88.In this example, Semiconductor substrate 88 is heterojunction bipolar transistor type substrate.Perhaps, Semiconductor substrate 88 can be pseudo-form high electron mobility type substrate, CMOS (Complementary Metal Oxide Semiconductor) type substrate, two CMOS (Complementary Metal Oxide Semiconductor) type substrate, metal semiconductor FET type substrate etc.The substrate of Semiconductor substrate 88 can be made of any suitable semi-conducting material, for example, and silicon (Si), SiGe (SiGe), GaAs (GaAs), indium phosphide (InP) etc.In this embodiment, the substrate of Semiconductor substrate 88 is made by silicon.Semiconductor substrate 88 is arranged on laminated substrates 86.

Except the radio frequency amplifying stage 12 shown in Fig. 5, the radio frequency amplification apparatus 62 shown in Fig. 6 also comprises a plurality of the second radio frequency amplifying stages (be commonly referred to element 90, and specifically be called element 90A-90C).A plurality of the second radio frequency amplifying stage 90 cascade coupled, thus each of a plurality of the second radio frequency amplifying stages 90 all is coupled, and the amplification to the second radiofrequency signal 92 is provided.Therefore, form the second initial radio frequency amplifying stage 90A, the second middle radio frequency amplifying stage 90B and the second final radio frequency amplifying stage 90C on Semiconductor substrate 88.Any one standard in second group of radio communication standard that can provide according to GSM standard is with the second radiofrequency signal 92 formats.Yet, to compare with the first group of radio communication standard that is in GSM standard, the frequency range of second group of radio communication standard is lower.For example, the second group of radio communication standard that is in GSM standard can comprise GSM 850 standards, GSM 900 standards, EDGE 850 standards and/or EDGE 900 standards.Therefore, above-mentioned radio frequency amplifying stage 12 can be used for carrying out high band and amplifies, and radio frequency amplifying stage 90 can be used for carrying out the low-frequency range amplification.TD-SCDMA standard and the band overlapping that is in EDGE 1800 standards, EDGE 1900 standards, DCS standard and the PCS standard of first group of radio communication standard of GSM standard.Therefore, also amplify the TD-SCDMA standard by radio frequency amplifying stage 12.Yet the TD-SCDMA standard when more effectively being in low-power mode as mentioned above, provides bypass path 64.

Radio frequency amplifying stage 90 is independent of radio frequency amplifying stage 12 provides amplification.Equally, control circuit 30 is configured to generate the second supply power voltage V _{Power supply}', provide power to give radio frequency amplifying stage 90.High-power mode and low-power mode are relevant with EDGE 900 standards to EDGE 850 standards in the second group of radio communication standard that is in GSM standard.Supply power voltage V _{Power supply}' have the dc offset voltage level in high-power mode, and being used for EDGE 850 standards and EDGE900 standard high-power mode both, be in lower dc offset voltage level.For GSM 850 standards and GSM 900 standards, its each be constant encapsulating type standard, but must meet its burst mask requirement separately.Therefore, provide supply power voltage V _Supply _Electricity' the supply power voltage level, in order to meet burst mask requirement.The 3rd radio frequency filter circuit 93 and the second final radio frequency amplifying stage 90C coupling are to provide impedance matching.It is also noted that, SPMT switch 74 comprises the another one terminal 94 with the second final radio frequency amplifying stage 90C coupling.Like this, control circuit 30 can operate SPMT switch 74, with connection terminal 80 and terminal 94, thereby after amplifying, can be by antenna 82 radiation the second radiofrequency signals 92.

Be noted that the SPMT switch 74 in Fig. 6 further comprises terminal 96, terminal 98, terminal 100 and terminal 102.Terminal 96,98,100 and 102 can with one or more receiver chains couplings in SPMT switch 74 downstreams.Antenna 82 can intercept dissimilar radio frequency receiving signal 104,106,108 and 110 from the base station.In this example, receive standard according to the TD-SCDMA that operates with about 1.9GHz, with radio frequency receiving signal 104 formats.Control circuit 30 operation SPMT switches 74 with connection terminal 80 and terminal 96, thereby can send radio frequency receiving signal 104 downstream.Receive standard according to TD-SCDMA, with radio frequency receiving signal 106 formats, but this radio frequency receiving signal operates with about 2GHz.Control circuit 30 connects terminal 80 and terminal 98, thereby can send downstream radio frequency receiving signal 106.Receive standard or PCS reception standard according to DCS, can be with radio frequency receiving signal 106 formats.Control circuit 30 connects terminal 80 and terminal 100, thereby can process radio frequency receiving signal 108 by the radio circuit in downstream.At last, can receive standard or GSM 900 reception standards according to GSM 850, with radio frequency receiving signal 110 formats.Control circuit 30 operation SPMT switches 74 with connection terminal 80 and terminal 102, thereby can send radio frequency receiving signal 110 downstream.

Referring to Fig. 6, Fig. 6 has set forth various control signal V in control inputs 32 again _{The slope}, GSM_EN, Ctr10, Ctr11, TD_EN, Ctr12 and Ctr13, in order to show various dissimilar modes of operation.Below shown form set forth attended operation state and control signal V _{The slope}, GSM_EN, Ctr10, Ctr11, TD_EN, Ctr12, Ctr13 an embodiment of truth table.

Control circuit 30 operationally is associated with SPMT switch 74 and generates switch and controls output 111, in order to therefore operate SPMT switch 74.In Fig. 6, use low pass filter design to implement the first rf filtering circuit 52, the second rf filtering circuit 56 and the 3rd radio frequency filter circuit 93.Each

rf filtering circuit

52,56 and 93 all can comprise impedance matching network, so that impedance matching to be provided.Impedance matching network can be broadband or arrowband.If be the broadband, harmonic filter can further be included in each

rf filtering circuit

52,56 and 93 so, with in radiofrequency signal 14 or the interior minimizing spurious emissions of the second radiofrequency signal 92.If impedance matching network is the arrowband, do not need so other harmonic filters.Exactly, impedance matching network can be tuning by control circuit 30.Tuned radio

frequency filter circuit

52,56 and 93 further configures rf filtering

circuit

52,56 and 93, with in radiofrequency signal 14 and the interior minimizing spurious emissions of the second radiofrequency signal 92.

Those skilled in the art will recognize that improvement and modification to preferred embodiment of the present disclosure.In the scope of disclosed concept and following claims, consider all this improvement and modifications in this article.

Claims

1. a radio frequency (RF) amplifying device, it comprises:

A plurality of radio frequency amplifying stages, its cascade coupled, thus each in described a plurality of radio frequency amplifying stage all can operate to provide the amplification to radiofrequency signal, and described a plurality of radio frequency amplifying stages comprise initial at least radio frequency amplifying stage and final radio frequency amplifying stage;

Bypass path, it can operate to be activated and to forbid, wherein said bypass path is coupling between described initial radio frequency amplifying stage and described final radio frequency amplifying stage, thereby when enabling described bypass path, receive described radiofrequency signal by described bypass path, and the described final radio frequency amplifying stage of described radiofrequency signal bypass, thereby and when the described bypass path of forbidding, described final radio frequency amplifying stage provides the amplification to described radiofrequency signal; And

Control circuit, it is configured to receive control inputs, described control inputs represents whether described radiofrequency signal is formatd according to the first radio communication standard or the second radio communication standard, and expression high-power mode or low-power mode, and described control circuit is configured to:

According to the described control inputs of described the first radio communication standard with described radiofrequency signal format, forbid described bypass path in response to expression;

In response to the described control inputs of the described high-power mode of expression, forbid described bypass path; And

In response to the described low-power mode of expression and according to described the second radio communication standard with described radiofrequency signal format described control inputs both, enable described bypass path.

2. radio frequency amplification apparatus according to claim 1, wherein said control circuit further is configured to:

Increase the one or more power in described a plurality of radio frequency amplifying stage, thereby in response to the described control inputs that represents described high-power mode, increase to the power delivery of described radiofrequency signal; And

Reduce the one or more power in described a plurality of radio frequency amplifying stage, thereby in response to the described low-power mode of expression and according to described the first radio communication standard with described radiofrequency signal format described control inputs both, be reduced to the power delivery of described radiofrequency signal.

3. radio frequency amplification apparatus according to claim 2, wherein said control circuit further is configured to increase the one or more power in described a plurality of radio frequency amplifying stage, thereby the described control inputs in response to the described high-power mode of expression, increase to the described power delivery of described radiofrequency signal, thereby with compare when described control inputs represents described the first radio communication standard, when described control inputs represented described the second radio communication standard, the described increase in power was less.

4. radio frequency amplification apparatus according to claim 1, wherein said a plurality of radio frequency amplifying stages further comprise the middle radio frequency amplifying stage of cascade coupled between described initial radio frequency amplifying stage and described final radio frequency amplifying stage.

5. radio frequency amplification apparatus according to claim 4, wherein said bypass path is coupling between described initial radio frequency amplifying stage and described middle radio frequency amplifying stage, thereby when enabling described bypass path, radio frequency amplifying stage in the middle of the further bypass of described radiofrequency signal is described, and thereby when the forbidding bypass path, described middle radio frequency amplifying stage provides the amplification to described radiofrequency signal.

6. radio frequency amplification apparatus according to claim 4, wherein said bypass path is coupling between described middle radio frequency amplifying stage and described final radio frequency amplifying stage, thereby when enabling described bypass path, described radiofrequency signal is the described final radio frequency amplifying stage of bypass only.

7. radio frequency amplification apparatus according to claim 1, wherein:

Described the first radio communication standard is global system for mobile communications (GSM) standard; And

Described the second radio communication standard is TD SDMA (TD-SCDMA) standard.

8. radio frequency amplification apparatus according to claim 7, wherein said control circuit be configured to receive described control inputs with further expression when according to described GSM standard during with the format of described radiofrequency signal, any in the first group of radio communication standard that provides according to described GSM standard, further with described radiofrequency signal format, described first group of radio communication standard comprises at least one enhanced data rates of GSM evolution (EDGE) standard.

9. radio frequency amplification apparatus according to claim 8, wherein said control circuit further is configured to:

Increase the one or more power in described a plurality of radio frequency amplifying stage, thereby in response to the described high-power mode of expression and according to any in described at least one EDGE standard with described radiofrequency signal format described control inputs both, increase to the power delivery of described radiofrequency signal; And

Reduce the one or more power in described a plurality of radio frequency amplifying stage, thereby in response to the described low-power mode of expression and according to any in described at least one EDGE standard with described radiofrequency signal format described control inputs both, be reduced to the power delivery of described radiofrequency signal.

10. radio frequency amplification apparatus according to claim 9, wherein:

Described at least one EDGE standard comprises EDGE 1800 standards and EDGE 1900 standards; And

Described first group of radio communication standard further comprises digital communication system (DCS) standard and Personal Communications Services (PCS) standard.

11. radio frequency amplification apparatus according to claim 10 further comprises:

More than second radio frequency amplifying stage, its cascade coupled, thereby each in described more than second radio frequency amplifying stage all can operate to provide the amplification to the second radiofrequency signal of any format in the second group of radio communication standard that provides according to described GSM standard, and wherein said second group of radio communication standard is in the low frequency range of comparing with described first group of radio communication standard.

12. radio frequency amplification apparatus according to claim 11, wherein said second group of radio communication standard comprises GSM 850 standards, GSM 900 standards, EDGE 850 standards and EDGE 900 standards.

13. radio frequency amplification apparatus according to claim 1 further comprises:

The first rf filtering circuit, itself and described final radio frequency amplifying stage are coupled, thereby send to described radiofrequency signal in described the first rf filtering circuit from described final radio frequency amplifying stage; And

Described bypass path, it comprises the second rf filtering circuit, wherein said the second rf filtering circuit is coupled along described bypass path, to receive described radiofrequency signal.

14. radio frequency amplification apparatus according to claim 13, wherein:

Described the first rf filtering circuit is configured, thereby when the described bypass path of forbidding, the first source impedance that provides from described final radio frequency amplifying stage and the first load impedance approximate match that offers described final radio frequency amplifying stage; And

Described the second rf filtering circuit is configured, thereby when enabling described bypass path, offer the second source impedance of described bypass path and the second load impedance approximate match that offers described a plurality of radio frequency amplifying stages from described bypass path from described a plurality of radio frequency amplifying stages.

15. radio frequency amplification apparatus according to claim 14, wherein said bypass path is coupling between described initial radio frequency amplifying stage and described final radio frequency amplifying stage, thereby when enabling described bypass path, described second source impedance is provided in described bypass path from described initial radio frequency amplifying stage, and described the second load impedance is provided to from described bypass path in described initial radio frequency amplifying stage.

16. radio frequency amplification apparatus according to claim 15, wherein:

Described a plurality of radio frequency amplifying stage further comprises the middle radio frequency amplifying stage of cascade coupled between described initial radio frequency amplifying stage and described final radio frequency amplifying stage; And

Described bypass path is coupling between described initial radio frequency amplifying stage and described middle radio frequency amplifying stage, thereby when enabling bypass path, radio frequency amplifying stage in the middle of the further bypass of described radiofrequency signal is described.

17. radio frequency amplification apparatus according to claim 14, wherein:

Described bypass path is coupling between described middle radio frequency amplifying stage and described final radio frequency amplifying stage, thereby when enabling described bypass path, described second source impedance is provided in described bypass path the radio frequency amplifying stage in the middle of described, and described the second load impedance is provided to from described bypass path in described middle radio frequency amplifying stage.

18. radio frequency amplification apparatus according to claim 14, wherein:

Described the first rf filtering circuit further is configured to reduce spurious emissions in described radiofrequency signal; And

Described the second rf filtering circuit further is configured to reduce spurious emissions in described radiofrequency signal.

19. radio frequency amplification apparatus according to claim 1, comprise that further hilted broadsword throws (SPMT) switch more, described single pole multiple throw comprises first terminal, it is connected to receive described radiofrequency signal when sending described radiofrequency signal from described final radio frequency amplifying stage, the second terminal, it is connected to receive described radiofrequency signal and third terminal from described bypass path, it is configured to be connected to antenna, and wherein said control circuit is configured to:

Operate described SPMT switch with in response to expression according to described the first radio communication standard with the described control inputs of described radiofrequency signal format and in response to the described control inputs of the described high-power mode of expression, forbid described bypass path by described first terminal is connected to described third terminal; And

Operate described SPMT switch described radiofrequency signal is formatd and described low-power mode described control inputs both according to described the second radio communication standard in response to expression, enable described bypass path by described the second terminal is connected to described third terminal.

20. radio frequency amplification apparatus according to claim 1, wherein said bypass path comprises one or more switches, and wherein enable described bypass path by the described one or more switches of closure, and forbid described bypass path by disconnecting described one or more switch.

21. radio frequency amplification apparatus according to claim 20, wherein said control circuit is configured in response to expression according to the described control inputs of described the first radio communication standard with described radiofrequency signal format, forbid described bypass path by disconnecting described one or more switch, and according to the described control inputs of described the second radio communication standard with described radiofrequency signal format, enable described bypass path by the described one or more switches of closure in response to expression.

22. a method of using a plurality of radio frequency amplifying stages amplification radio frequency (RF) signals of cascade coupled comprises:

Receive control inputs, described control inputs represents whether described radiofrequency signal is formatd and expression high-power mode and low-power mode according to the first radio communication standard or the second radio communication standard;

Enable bypass path, thus in response to the described low-power mode of expression and according to described the second radio communication standard with described radiofrequency signal format described control inputs both, in the described a plurality of radio frequency amplifying stages of described radiofrequency signal bypass final one; And

Forbid described bypass path, thereby comprise according to described the first radio communication standard with the one or more described control inputs in the group of described radiofrequency signal format and described high-power mode, by the described radiofrequency signal of each amplification in described a plurality of radio frequency amplifying stages in response to expression.

23. method according to claim 22, in in the middle of wherein said a plurality of radio frequency amplifying stage comprises in initial in described a plurality of radio frequency amplifying stage one, described a plurality of radio frequency amplifying stages one and described a plurality of radio frequency amplifying stage final one, and wherein enable described bypass path, thereby described in the described a plurality of radio frequency amplifying stages of described radiofrequency signal bypass final one, in the middle of further comprising described in the described a plurality of radio frequency amplifying stages of described radiofrequency signal bypass one.

24. method according to claim 22, in the middle of wherein said a plurality of radio frequency amplifying stage comprises in initial in described a plurality of radio frequency amplifying stage one, described a plurality of radio frequency amplifying stages one and described a plurality of radio frequency amplifying stage in final one, and wherein enable only described in the described a plurality of radio frequency amplifying stages of bypass final one of described bypass path.