CN1780154A - Transmitting power control circuit of mobile telephone - Google Patents
Transmitting power control circuit of mobile telephone Download PDFInfo
- Publication number
- CN1780154A CN1780154A CNA2005100773725A CN200510077372A CN1780154A CN 1780154 A CN1780154 A CN 1780154A CN A2005100773725 A CNA2005100773725 A CN A2005100773725A CN 200510077372 A CN200510077372 A CN 200510077372A CN 1780154 A CN1780154 A CN 1780154A
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- CN
- China
- Prior art keywords
- power
- amplifier
- output
- power amplifier
- mentioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
The invention relates to a power compensation technology of mobile telephone power amplifier whose sending power of each channel can avoid being affected by environmental changes such as temperature and humidity and so on.The invention includes: power amplifier for amplifying power for the transmitting signal as the antenna transmits the transmitting signal to base station; a power inspection portion for inspecting output power of the power amplifier by micro strip; an amplifier for amplifying the signal inspected by the inspection portion to set degree; a controller for analyzing transmission power of current channel output by the power amplifier, according to the output signal of the amplifier, to control the transmission power to keep correspondence with the transmission power of other channels. The invention can avoid being affected by environmental change thereby keeping the transmission power of every channel in accordance.
Description
Technical field
The present invention relates to the technology of mobile phone transmission power control aspect, the transmitting power control circuit that particularly relates to mobile phone, promptly pass through the power output of detection power amplifier, the transmitting power control circuit that compensates in real time for the transmitted power that makes each channel is not subjected to the influence of environmental change to remain unanimity.
Background technology
Usually, mobile phone is when the environmental change of temperature, humidity etc., because the accessory on the transmit path, as the difference of power amplifier (PAM), saw filter (SAW Filter) interchannel performance, the transmitted power of interchannel can produce difference.
Therefore, on existing mobile phone, utilize electro-hot regulator to come detection power sending part temperature on every side, and, disposable compensation is carried out in the gain and loss of each channel on the mobile phone according to detected result.
Summary of the invention
As mentioned above, on existing mobile phone, by the temperature around the detection power sending part, when the gain and loss of each channel of mobile phone was compensated, owing to be the bulking property compensation, difference appearred in the gain and loss meeting of each channel.
Therefore, the object of the present invention is to provide a kind of transmitting power control circuit, promptly pass through the power output of detection power amplifier, the transmitting power control circuit that compensates in real time for the transmitted power that makes each interchannel is not subjected to the influence of the environmental change of temperature, humidity etc. to remain unanimity.
The invention is characterized in that it comprises:
In the time of will sending signal and send to the base station by antenna, in order to amplify the power amplifier that sends signal power;
Detect the power detection portion of described power amplifier output power by microstrip (Microstrip Line);
The detected signal of described power detection portion is amplified to the amplifier of setting grade;
According to the output signal of amplifier, analyze the transmitted power of the current channel of exporting by described power amplifier, control the control part that the transmitted power of this transmitted power and each channel is consistent afterwards.
Described microstrip is coupling between the input of the output of above-mentioned power amplifier and above-mentioned antenna duplexer.
Described power detection portion makes the resistance that is connected side by side with this power amplifier output in order to detect the power output of above-mentioned power amplifier.Also be connected side by side with the input of above-mentioned power detection portion.
As above-mentioned detailed description, the present invention is by the power output of detection power amplifier, compensate in real time for the transmitted power that keeps each interchannel is consistent all the time, thereby have can be under the influence that is not subjected to environment conversion such as temperature, humidity, remains the effect of unanimity of the transmitted power of each interchannel.
Description of drawings
Fig. 1 is based on mobile phone transmitting power control circuit block diagram of the present invention.
The symbol description * * * of * * accompanying drawing major part
1: power amplifier 2: antenna duplexer
3: microstrip 4: power detection portion
5: amplifier 6: control part
Embodiment
Fig. 1 is based on mobile phone transmitting power control circuit one example schematic of the present invention.As shown in the figure, its formation comprises: when the signal that will send by antenna sends to the base station, in order to amplify the power amplifier 1 that sends signal power; Be connected with above-mentioned antenna ANT, separate the antenna duplexer 2 that receives with transmission frequency; Detect the power detection portion 4 of the power output of above-mentioned power amplifier 1 by microstrip 3; Above-mentioned power detection portion 4 detected small-signals are amplified to the amplifier 5 of setting grade; According to the output signal of amplifier 5, analyze the transmitted power of the current channel of exporting by above-mentioned power amplifier 1, control the control part 6 that the transmitted power of this transmitted power and each channel is consistent.Below this formation of the present invention is elaborated.
The preamplifier of portable terminal is input to power amplifier 1 with preposition amplifying signal, amplifies before wireless transmission, and the signal that is exaggerated like this sends to the base station by antenna duplexer 2 and antenna ANT.
Here, above-mentioned antenna duplexer 2 is to link together with above-mentioned antenna ANT, plays the effect that receives with transmission frequency that separates.
On the other hand, power detection portion 4 is by the power output of the above-mentioned power amplifier 1 of microstrip 3 detections, and detected like this signal because its intensity is very faint, is exported after suitably amplifying by amplifier 5 again.
In the above description, above-mentioned power detection portion 4 using microstrip 3 to describe as an example, but also can use resistance to replace microstrip 3 to detect for the power output that detects above-mentioned power amplifier 1.In this case, the output line of above-mentioned resistance and power amplifier 1 is parallel to be connected, and simultaneously, this resistance also and be connected in the input of above-mentioned power control section.
Also have, control part 6 is according to the output signal of above-mentioned amplifier 5, analyze transmitted power by the current channel of above-mentioned power amplifier 1 output, for making the influence of environmental changes such as the temperature of this transmitted power around not being subjected to, humidity, control and be consistent with the transmitted power of each interchannel all the time.Here, each channel is meant all channels that use between mobile phone and the base station.
Finally, as mentioned above, by return path, the transmitted power of mobile phone obtains compensation in real time, thereby can keep the transmitted power of each interchannel consistent all the time under the influence that is not subjected to environmental changes such as temperature, humidity.
Claims (3)
1, a kind of transmitting power control circuit of mobile phone is characterized in that it comprises:
In the time of will sending signal and send to the base station by antenna, in order to amplify the power amplifier that sends signal power;
Detect the power detection portion of described power amplifier output power by microstrip;
The detected signal of described power detection portion is amplified to the amplifier of setting grade;
According to the output signal of amplifier, analyze the transmitted power of the current channel of exporting by described power amplifier, control the control part that the transmitted power of this transmitted power and each channel is consistent afterwards.
2, according to the transmitting power control circuit of the 1st described mobile phone, it is characterized in that:
Described microstrip is coupling between the input of the output of above-mentioned power amplifier and above-mentioned antenna duplexer.
3, according to the transmitting power control circuit of the 1st described mobile phone, it is characterized in that:
Described power detection portion makes with this power amplifier output to be connected resistance side by side in order to detect the power output of above-mentioned power amplifier, also is connected side by side with the input of above-mentioned power detection portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040096475 | 2004-11-23 | ||
| KR1020040096475A KR100641219B1 (en) | 2004-11-23 | 2004-11-23 | Transmission power control circuit for mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1780154A true CN1780154A (en) | 2006-05-31 |
Family
ID=36770294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100773725A Pending CN1780154A (en) | 2004-11-23 | 2005-06-23 | Transmitting power control circuit of mobile telephone |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100641219B1 (en) |
| CN (1) | CN1780154A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571152A (en) * | 2012-03-02 | 2012-07-11 | 钜泉光电科技(上海)股份有限公司 | Control device of transmitted power of power line carrier communication |
| CN101494477B (en) * | 2008-01-23 | 2012-11-14 | 联芯科技有限公司 | Terminal power control method and device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9608305B2 (en) * | 2014-01-14 | 2017-03-28 | Infineon Technologies Ag | System and method for a directional coupler with a combining circuit |
| CN110012529B (en) * | 2019-03-13 | 2022-03-15 | 维沃移动通信有限公司 | Gain mode switching method and mobile terminal |
| CN117278073B (en) * | 2023-11-17 | 2024-01-30 | 北京雷格讯电子股份有限公司 | Automatic adjustment method for ultra-wideband antenna signals |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6662018B1 (en) | 2000-06-28 | 2003-12-09 | Northrop Grumman Corporation | Analog power control system for a multi-carrier transmitter |
-
2004
- 2004-11-23 KR KR1020040096475A patent/KR100641219B1/en not_active IP Right Cessation
-
2005
- 2005-06-23 CN CNA2005100773725A patent/CN1780154A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494477B (en) * | 2008-01-23 | 2012-11-14 | 联芯科技有限公司 | Terminal power control method and device |
| CN102571152A (en) * | 2012-03-02 | 2012-07-11 | 钜泉光电科技(上海)股份有限公司 | Control device of transmitted power of power line carrier communication |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060057658A (en) | 2006-05-26 |
| KR100641219B1 (en) | 2006-11-02 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |