CN1097999C - Signal transmission circuit for radio hand set - Google Patents
Signal transmission circuit for radio hand set Download PDFInfo
- Publication number
- CN1097999C CN1097999C CN99104023A CN99104023A CN1097999C CN 1097999 C CN1097999 C CN 1097999C CN 99104023 A CN99104023 A CN 99104023A CN 99104023 A CN99104023 A CN 99104023A CN 1097999 C CN1097999 C CN 1097999C
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- China
- Prior art keywords
- power amplifier
- signal
- radiofrequency signal
- switch
- circuit
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- 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.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to a signal transmission circuit for reducing the power consumption of a radio handset, which comprises a voice converting circuit, a voice modulator, a power amplifier, a first switch, an antenna and a control circuit, wherein the voice converting circuit is used for converting the voice of a user into a voice signal; the voice modulator which is electrically connected with the voice converting circuit is used for modulating the voice signal into a radio frequency (RF) signal; the power amplifier which is electrically connected with the voice modulator is used for amplifying the RF signal; the first switch which is electrically connected with the power amplifier is used for switching on and off the power amplifier; the antenna is used for transmitting the RF signal output by the power amplifier, and the control circuit is used for controlling the operation of the handset. With the utilization of the first switch, the RF signal generated by the voice modulator is amplified and output via the antenna, and the power amplifier is switched off when a radio signal is received.
Description
Technical field
The present invention system provides a kind of signal circuit that is used in mobile radio telephone, refers to a kind of signal circuit that reduces the electrical source consumption of mobile radio telephone especially.
General mobile radio telephone is to use battery that power supply is provided, and the electric energy that battery can provide but is limited, and especially the battery of mobile phone is stressed compact overall weight with the minimizing mobile phone, and battery often only can provide the mobile phone energy of a few hours.Mobile radio telephone is also stressed the sensitivity (sensitivity) that receives signal very much in addition.Therefore how to reduce the electrical source consumption of mobile phone, and the sensitivity of raising mobile phone is important the considering of research and development mobile radio telephone.
Background technology
Please refer to Fig. 1.Fig. 1 is the schematic diagram of known signal circuit 10.Signal circuit 10 is to use in a mobile radio telephone.Signal circuit 10 includes a voice conversion circuit 12, be used for converting a user sound to voice signal, one speech modulator 14 is electrically connected on voice conversion circuit 12, be used for this voice signal modulation to convert a radiofrequency signal to, one power amplifier (poweramplifier) 16 is electrically connected on speech modulator 14, be used for this radiofrequency signal is amplified, one power supply 22 is electrically connected on power amplifier 16, be used for to power amplifier 16 power supplies, one antenna 20 is used for the radiofrequency signal that power that emission power amplifier 16 exported has amplified, and one match circuit 18 be electrically connected between power amplifier 16 and the antenna 20, be used for the impedance of mesh power amplifier 16 and antenna 20.
Known mobile radio telephone is when output and received signal, and power amplifier 16 all is to be in electric power starting (ON) state.When the voice signal of mobile radio telephone the output user, power amplifier 16 can make radiofrequency signal that speech modulator 14 produced amplify and via antenna 20 outputs.And when mobile radio telephone when receiving radio signals, power amplifier 16 still is in opening, then consumes the power supply of mobile phone this moment for no reason.Because in the known signal circuit 10, power supply 22 continues power amplifier 16 power supplies, therefore make mobile phone be in output or accepting state power amplifier 16 all is the state that is in electric power starting, cause the consumption of cellular phone power supplies for no reason, shorten the battery life of mobile phone.In addition, in known signal circuit 10, when mobile phone is converted to accepting state by output state, can slip up to some extent because of the control on the conversion timing sequence, and the radiofrequency signal that generation speech modulator 14 is produced is imported the phenomenon of power amplifier 16 into, this moment since the power supply of power amplifier 16 still in opening, so this radiofrequency signal still can be exaggerated and launch, and causes the unnecessary power consumption of mobile phone.And this phenomenon also may cause the loss of received signal, reduces the sensitivity of mobile phone when received signal.
Summary of the invention
Therefore, main purpose of the present invention is to provide a kind of signal circuit of mobile radio telephone, with the electrical source consumption of minimizing mobile radio telephone, and improves the sensitivity of mobile phone when received signal.
A kind of signal circuit that is used in mobile radio telephone provided by the invention, this signal circuit includes: a voice conversion circuit is used for a user voice conversion is become voice signal; One speech modulator (voice modulator) is electrically connected on this voice conversion circuit, is used for a radiofrequency signal is modulated and converted to this voice signal; One power amplifier (power amplifier) is electrically connected on this speech modulator, is used for this radiofrequency signal is amplified; One first switch is electrically connected on this power amplifier, is used for opening and closing this power amplifier; One antenna is used for launching the radiofrequency signal that this power amplifier is exported; And a control circuit, be used for controlling the operation of this mobile phone; Wherein when this mobile phone in output this user voice signal the time, this control circuit can utilize this first switch to open this power amplifier so that the radiofrequency signal that this speech modulator is produced is exaggerated and via the output of this antenna, and when this mobile phone when receiving radio signals, this control circuit can utilize this first switch to cut out this power amplifier to reduce the electrical source consumption of this mobile phone.
Description of drawings
Be described in detail with reference to the attached drawings the present invention below in conjunction with embodiment.
Fig. 1 is the schematic diagram of known signal circuit;
Fig. 2 is the schematic diagram of signal circuit of the present invention.
Embodiment
Please refer to Fig. 2.Fig. 2 is the schematic diagram of signal circuit 30 of the present invention.Signal circuit 30 is to use in a mobile radio telephone.Signal circuit 30 includes a voice conversion circuit 32 and is used for converting a user sound to voice signal, one speech modulator (voice modulator) 34 is electrically connected on voice conversion circuit 32, be used for this voice signal modulation to convert a radiofrequency signal to, one power amplifier (power amplifier) 36 is electrically connected on speech modulator 34, be used for this radiofrequency signal is amplified, one first switch 38 is electrically connected on power amplifier 36, be used for opening and closing power amplifier 36, one second switch 40 is electrically connected between speech modulator 34 and the power amplifier 36, be used for controlling the transmission of this radiofrequency signal, one antenna 44 is used for the radiofrequency signal that power that emission power amplifier 36 exported has amplified, one match circuit 42 is electrically connected between power amplifier 36 and the antenna 44, be used for the impedance of mesh power amplifier 36 and antenna 44, and a control circuit 46 is used for controlling the operation of this mobile radio telephone.
When mobile phone during in output user's voice signal, control circuit 46 can utilize first switch 38 and second switch 40 to open power amplifier 36 so that the radiofrequency signal that speech modulator 34 is produced is exaggerated and via antenna 44 output.When mobile phone when receiving radio signals, control circuit 46 can utilize first switch 38 to cut out power amplifier 36 reducing the electrical source consumption of mobile phone, and control circuit 46 can cut out second switch 40 and imports power amplifier 36 into the radiofrequency signal of avoiding speech modulator 34 to be produced.First switch 38 includes a bipolar junction transistor (BJT, bipolar junction transistor) 48 of controlling via control circuit 46, is electrically connected between a power supply 50 and the power amplifier 36, is used for the power supply supply of control power amplifiers 36.Second switch 40 includes a PIN diode (PIN diode) 52, be electrically connected between the input of the output of speech modulator 34 and power amplifier 36, be used for controlling the transmission of this radiofrequency signal, one first radiofrequency signal block device (RF choke) 54, be electrically connected between the input of control end 47 of control circuit 46 and PIN diode 52, the radiofrequency signal that is used for stoping speech modulator 34 to be exported is imported control circuit 46 into, and one second radiofrequency signal block device 56, be electrically connected between the output and an earth connection 58 of PIN diode 52.
When mobile phone output the user voice signal the time, control circuit 46 can make the voltage of control end 47 be higher than a scheduled voltage to come conducting bipolar junction transistor 48 and PIN diode 52, open power amplifier 36 to utilize first switch 38, and second switch 40 is opened, make the radiofrequency signal of speech modulator 34 outputs be imported into power amplifier 36, amplify via antenna 44 outputs by power amplifier 36 again.And when mobile phone when receiving radio signals, control circuit 46 can make the voltage of control end 47 be lower than this scheduled voltage, close bipolar junction transistor 48 and PIN diode 52, utilizing first switch 38 to close the electrical source consumption that power amplifier 36 reduces mobile phone, and close the radiofrequency signal that second switch 40 makes speech modulator 34 be produced and to import power amplifier 36 into.
Because the unlatching or the closed condition of first switch, 38 control power amplifiers 36 make power amplifier 36 be in closed condition when mobile phone receives radio signals, therefore can reduce the electric former consumption of mobile radio telephone.In addition since the radiofrequency signal that second switch control speech modulator is produced to the transmission of power amplifier, make radiofrequency signal when mobile phone receives radio signals, can't import power amplifier 36 into, therefore can save the power supply consume of mobile phone, and the sensitivity that improves mobile phone.
Compared to known signal circuit 10, signal circuit 30 of the present invention has unlatching or the closed condition that first switch 38 comes control power amplifiers 36, and second switch 40 is controlled radiofrequency signal the importing into power amplifier 36 that speech modulator 34 is produced.When mobile phone was in the state of received signal, control circuit 46 can utilize first switch 38 to cut out power amplifier 36, and can close second switch 40 and disturb the radio signal that receives with the radiofrequency signal of avoiding speech modulator 34 and being produced.Therefore the present invention's signal circuit of being used in mobile radio telephone can reduce the electrical source consumption of mobile phone, and improves the sensitivity of mobile phone when received signal.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (4)
1. signal circuit that is used in mobile radio telephone, this signal circuit includes:
One voice conversion circuit is used for a user voice conversion is become voice signal;
One speech modulator is electrically connected on this voice conversion circuit, is used for a radiofrequency signal is modulated and converted to this voice signal;
One antenna is used for launching the radiofrequency signal that this power amplifier is exported;
One power amplifier is electrically connected on this speech modulator, is used for this radiofrequency signal is amplified;
It is characterized in that also including:
One first switch is electrically connected on this power amplifier, is used for opening and closing this power amplifier;
One control circuit is used for controlling the operation of mobile phone;
Wherein when this mobile phone in output this user voice signal the time, this control circuit can utilize this first switch to open this power amplifier so that the radiofrequency signal that this speech modulator is produced is exaggerated and via the output of this antenna, and when this mobile phone when receiving radio signals, this control circuit can utilize this first switch to cut out this power amplifier to reduce the electrical source consumption of this mobile phone.
2. signal circuit as claimed in claim 1, it is characterized in that, this first switch includes the bipolar junction transistor that can be controlled by this control circuit, is electrically connected between a power supply and this power amplifier, is used for controlling the power supply supply of this power amplifier.
3. signal circuit as claimed in claim 1, it is characterized in that, other includes a second switch and is electrically connected between this speech modulator and this power amplifier, be used for controlling the transmission of this radiofrequency signal, wherein when this mobile phone in output this user voice signal the time, this control circuit can be opened this second switch so that this radiofrequency signal is amplified to output, and when this mobile phone when receiving radio signals, this control circuit can cut out this second switch can import this power amplifier into the radiofrequency signal of avoiding this speech modulator to be produced.
4. signal circuit as claimed in claim 3 is characterized in that, this second switch includes:
One PIN diode is electrically connected between the input of the output of this speech modulator and this power amplifier, is used for controlling the transmission of this radiofrequency signal;
One first radiofrequency signal block device is electrically connected between the input of a control end of this control circuit and this PIN diode, is used for stoping the radiofrequency signal of this speech modulator output to import this control circuit into; And
One second radiofrequency signal block device is electrically connected between the output and an earth connection of this PIN diode;
Wherein when the control end voltage of this control circuit is higher than a scheduled voltage, this PIN diode can be switched on so that the radiofrequency signal of this speech modulator output is imported into this power amplifier, and when the control end voltage of this control circuit was lower than this scheduled voltage, this PIN diode can be closed with the radiofrequency signal of avoiding this speech modulator to be produced can import this power amplifier into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99104023A CN1097999C (en) | 1999-03-17 | 1999-03-17 | Signal transmission circuit for radio hand set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99104023A CN1097999C (en) | 1999-03-17 | 1999-03-17 | Signal transmission circuit for radio hand set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1268013A CN1268013A (en) | 2000-09-27 |
| CN1097999C true CN1097999C (en) | 2003-01-01 |
Family
ID=5271520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99104023A Expired - Fee Related CN1097999C (en) | 1999-03-17 | 1999-03-17 | Signal transmission circuit for radio hand set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1097999C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334814C (en) * | 2003-08-22 | 2007-08-29 | 智邦科技股份有限公司 | Radio frequency power controlling systems |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433549C (en) * | 2003-09-05 | 2008-11-12 | 中兴通讯股份有限公司 | Apparatus and method for realizing linear switch power amplifying |
| US7945295B2 (en) * | 2007-12-03 | 2011-05-17 | Motorola Solutions, Inc. | Portable radio and battery pack configuration |
| US8913970B2 (en) | 2010-09-21 | 2014-12-16 | Apple Inc. | Wireless transceiver with amplifier bias adjusted based on modulation scheme |
| US8738066B2 (en) | 2010-10-07 | 2014-05-27 | Apple Inc. | Wireless transceiver with amplifier bias adjusted based on modulation scheme and transmit power feedback |
| CN102970051B (en) * | 2012-11-02 | 2015-04-08 | 上海移远通信技术有限公司 | Anti-interference wireless communication system |
| CN103258353A (en) * | 2013-05-02 | 2013-08-21 | 无锡昶达信息技术有限公司 | Non-stop electronic toll collection system radio frequency receiving and sending module |
-
1999
- 1999-03-17 CN CN99104023A patent/CN1097999C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334814C (en) * | 2003-08-22 | 2007-08-29 | 智邦科技股份有限公司 | Radio frequency power controlling systems |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1268013A (en) | 2000-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BENQ ELECTRONS STOCK CO., LTD. Free format text: FORMER NAME OR ADDRESS: MINGHONG STOCK CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Benq Corp. Patentee before: Mingqi Computer Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: BENQ MOTOR CO., LTD. Free format text: FORMER NAME OR ADDRESS: BENQ ELECTRONS STOCK CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Benq Corp. Patentee before: Benq Corp. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030101 |