CN1574665A - 前端模块 - Google Patents
前端模块 Download PDFInfo
- Publication number
- CN1574665A CN1574665A CN 200410055245 CN200410055245A CN1574665A CN 1574665 A CN1574665 A CN 1574665A CN 200410055245 CN200410055245 CN 200410055245 CN 200410055245 A CN200410055245 A CN 200410055245A CN 1574665 A CN1574665 A CN 1574665A
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- Prior art keywords
- amplifier
- end module
- gsm
- voltage
- converter
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- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000007423 decrease Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
- H03F1/0233—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply
- H03F1/0238—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply using supply converters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0244—Stepped control
- H03F1/0255—Stepped control by using a signal derived from the output signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
Abstract
一种双模无线电接收机的前端模块(21),该双模无线电接收机具有第一和第二放大器(25和28),分别对应用于两种模式的第一和第二发射路径(23和26),前端模块(21)配有电池(29),用于为放大器(25和28)供电,并且具有升压/降压DC-DC变换器(30),用于控制由电池提供给两个放大器的电压。
Description
技术领域
本发明涉及双模无线电设备的前端模块,特别涉及GSM/UMTS(全球移动通信系统/通用移动远程通信系统)移动电话手机的前端模块。
背景技术
移动电话手机的前端模块是位于手机的天线和其收发信机间的部分,并且在发射和接收操作间进行切换。这样,如图1所示,GSM电话手机(未示出)的前端模块1在天线2与GSM发射和接收路径3和4之间切换通信信号。GSM发射路径3包括GSM功率放大器5。放大器5是特别为GSM发射设计的,并且指定下至3伏的电池供电,用以在电池和温度的极限维持所需的GSM性能。
随着移动电话技术的进步,GSM网络正在被G3(UMTS)网络所代替。因此,新的移动电话手机需要在GSM和UMTS两个网络操作,并且导致对越来越复杂的多模式、多频带手机的需求。
对GSM/UMTS移动电话手机来说,目前的趋势是在双模应用中使用增强的GSM前端模块,GSM和UMTS的发射和接收路径都与模块连接。这样,如图2所示,GSM/UMTS移动电话手机(未示出)的GSM/UMTS前端模块11在天线12,以及GSM发射和接收路径13和14,或UMTS发射和接收路径16和17之间切换通信信号。GSM功率放大器15在GSM发射路径13中被提供,并且,UMTS功率放大器18在UMTS发射路径16中被提供。
正如前面所提到的,GSM功率放大器15通常是标准功率放大器。因为放大器被设计成采用信号方式前端模块比如模块1的最大性能,由使用双模前端模块比如模块11所引起的额外的衰减意味着在电池和温度的极限维持GSM发射功率输出是不可能的。
发明内容
本发明的目的是提供一种双模前端模块,它可以与标准GSM功率放大器一起使用,同时在电池和温度的极限维持GSM发射功率输出。
本发明提供一种双模无线电接收机的前端模块,该双模无线电接收机具有第一和第二放大器,分别对应用于两种模式的第一和第二发射路径,前端模块配有电池,用于为放大器供电,并且具有升压/降压DC-DC变换器,用于控制提供给两个放大器的电压。
在一个优选的实施例中,第一放大器是GSM功率放大器,并且第二放大器是UMTS功率放大器。
优选地,变换器被安排为输出一个上升的电压到第一放大器并输出一个下降的电压到第二放大器。
有利的,变换器被安排提供范围从3.6伏到4.2伏的电压到第一放大器。
在优选的实施例中,当第二放大器的输出功率比最大输出功率小时,变换器被安排提供下降的电压。方便地,当输出功率减小到10dBm时,变换器被安排提供3.6伏的下降的电压到第二放大器。
附图说明
图1是现有的GSM手机的前端模块的示意图。
图2是现有的GSM/UMTS手机的前端模块的示意图。
图3是本发明的GSM/UMTS手机的前端模块的示意图。
具体实施方式
参照图3,通过例子,现在更详细地描述本发明,图3示意性地示出了根据本发明的前端模块的结构图。
参照图3,GSM/UMTS移动电话手机(未示出)的前端模块21在天线22与GSM发射和接收路径23和24,或UMTS发射和接收路径26和27之间切换通信信号。标准GSM功率放大器25在GSM发射路径23中被提供,并且UMTS功率放大器28在UMTS发射路径26中被提供。两个功率放大器25和28经由DC到DC变换器30由锂离子电池29供电。变换器30是一个升压/降压变换器,被安排提供与GSM功率放大器25或UMTS功率放大器28所需的输入电压相匹配的稳定的输出电压。
这样,当前端模块21在GSM模式操作时,变换器30提供上升的电压(范围从3.6伏到4.2伏)到GSM功率放大器25,有效地利用在这些较高的电压电平时放大器改进了的性能。增强的功率性能好于克服由在GSM发射路径23中双模前端模块21所引起的衰减损耗所需的性能。
正如示出的那样,变换器30也用于给UMTS功率放大器28供电,并且这导致放大器增益/效率的改进及ACP(自动功率控制)稳定性的改进。使用变换器30为UMTS功率放大器28供电的另一好处是电池可以使用更低的电压,导致更长的待机和数据下载/通话时间。这样,如果UMTS功率放大器在A类或AB类模式操作,当它导通时,它始终汲取电流(静态电流)。电流水平被设置使得线性(压缩点)足够高,不会在最大传输功率引起ACP问题。静态电流能通过改变放大器的电压供给而被控制,使得能使用较低的电流;并且这将反过来减少功率放大器的线性/压缩点。这样,利用这个原理,通过对较低的发射电平,减少给UMTS功率放大器28供电的电压,以节省电流(并因此增加效率)成为可能。举例来说,当UMTS功率放大器28在全发射功率(在天线22,21/24dBm),放大器的供电可以是3.8伏。然而,当输出功率减小到10dBm,供电可以减小到3.6伏以节省电流汲取并改善手机的效率。
Claims (6)
1.一种双模无线电接收机的前端模块,该双模无线电接收机具有第一和第二放大器,分别对应用于两种模式的第一和第二发射路径,所述前端模块配有电池,用于为所述放大器供电,并且具有升压/降压DC-DC变换器,用于控制提供给两个放大器的电压。
2.如权利要求1所述的前端模块,其中所述第一放大器是GSM功率放大器,所述第二放大器是UMTS功率放大器。
3.如权利要求1或2所述的前端模块,其中所述变换器被安排输出一个上升的电压到所述第一放大器并输出一个下降的电压到所述第二放大器。
4.如权利要求3所述的前端模块,其中所述变换器被安排提供范围从3.6伏到4.2伏的电压到所述第一放大器。
5.如权利要求3或4所述的前端模块,其中当所述第二放大器的输出功率比最大输出功率小时,所述变换器被安排提供下降的电压。
6.如权利要求5所述的前端模块,其中当输出功率减小到10dBm时,所述变换器被安排提供3.6伏的下降的电压到所述第二放大器。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0312223.1 | 2003-05-28 | ||
GB0312223A GB2402279B (en) | 2003-05-28 | 2003-05-28 | Front end module |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1574665A true CN1574665A (zh) | 2005-02-02 |
Family
ID=9958883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 200410055245 Pending CN1574665A (zh) | 2003-05-28 | 2004-05-28 | 前端模块 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1482636A1 (zh) |
CN (1) | CN1574665A (zh) |
GB (1) | GB2402279B (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7245180B2 (en) * | 2005-08-02 | 2007-07-17 | Sony Ericsson Mobile Communications Ab | Intelligent RF power control for wireless modem devices |
CN101986507A (zh) * | 2010-11-19 | 2011-03-16 | 东南大学 | 一种延长无线传感器电池供电时间的方法和专用电路 |
US9276428B2 (en) * | 2011-07-06 | 2016-03-01 | Htc Corporation | System power integrated circuit and architecture, management circuit, power supply arrangement, and portable apparatus |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5251331A (en) * | 1992-03-13 | 1993-10-05 | Motorola, Inc. | High efficiency dual mode power amplifier apparatus |
US5423078A (en) * | 1993-03-18 | 1995-06-06 | Ericsson Ge Mobile Communications Inc. | Dual mode power amplifier for analog and digital cellular telephones |
US6069525A (en) * | 1997-04-17 | 2000-05-30 | Qualcomm Incorporated | Dual-mode amplifier with high efficiency and high linearity |
KR100573988B1 (ko) * | 1997-12-12 | 2006-04-25 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 통신 장치 |
US6327462B1 (en) * | 1998-12-29 | 2001-12-04 | Conexant Systems, Inc. | System and method for dynamically varying operational parameters of an amplifier |
US6639471B2 (en) * | 2001-04-16 | 2003-10-28 | Matsushita Electric Industrial Co., Ltd. | Power amplifier circuit, control method for power amplifier circuit, and portable terminal apparatus for mobile communication |
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2003
- 2003-05-28 GB GB0312223A patent/GB2402279B/en not_active Expired - Fee Related
-
2004
- 2004-05-25 EP EP20040253058 patent/EP1482636A1/en not_active Ceased
- 2004-05-28 CN CN 200410055245 patent/CN1574665A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2402279A (en) | 2004-12-01 |
GB0312223D0 (en) | 2003-07-02 |
GB2402279B (en) | 2006-04-26 |
EP1482636A1 (en) | 2004-12-01 |
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Effective date of registration: 20060421 Address after: cambridge Applicant after: Eubie Niti Kors (VPT) Ltd Address before: Hertfordshire Applicant before: Eero Flacks Cam Boli Gee Ltd |
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C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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