CN201590817U - Wireless transmitting and receiving circuit - Google Patents
Wireless transmitting and receiving circuit Download PDFInfo
- Publication number
- CN201590817U CN201590817U CN2009202864008U CN200920286400U CN201590817U CN 201590817 U CN201590817 U CN 201590817U CN 2009202864008 U CN2009202864008 U CN 2009202864008U CN 200920286400 U CN200920286400 U CN 200920286400U CN 201590817 U CN201590817 U CN 201590817U
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- switch
- low noise
- noise amplifier
- transmit
- antenna
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- Expired - Lifetime
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Abstract
The utility model discloses a wireless transmitting and receiving circuit, which comprises a receiving and transmitting unit, a low noise amplifier, a power amplifier, a first switch and a second switch. The first switch is coupled among a receiving end, the low noise amplifier and a grounding end to be used for electrically connecting the receiving end to the grounding end or the low noise amplifier, and the second switch is coupled among the receiving end, the power amplifier and an antenna to be used for electrically connecting the antenna to the receiving end or the power amplifier. Through the insulation of the first switch and the second switch, a receiving and transmitting unit can avoid being damaged when radio-frequency signals outputted by the power amplifier are coupled to the low noise amplifier.
Description
Technical field
The utility model relates to a kind of wireless transceiver circuit, and particularly relevant for a kind of wireless transceiver circuit that utilizes switch to increase the Signal Spacing degree.
Background technology
Along with the maturation of Radio Transmission Technology with popularize, considerable consumption electronic products have been arranged at present, for example mobile phone, notebook or wireless network card etc. all can be equipped with radio receiving transmitting module and carry out wireless transmission.And along with the popularizing of wireless network, the built-in wireless network card of notebook or use 3G action network interface card to connect the inevitable trend of network.
Radio receiving transmitting module can be used for switching the transmission/receiving key (Tx/Rx Switch) of transfer path and RX path usually in the receiving terminal setting of antenna.Yet, because transmission/receiving key can't reach the requirement of high-isolation (isolation) usually, when radio receiving transmitting module transmitted radiofrequency signal (radio signal) to antenna via power amplifier, the radiofrequency signal that transmitted can radiation or is coupled to RX path and the Transmit-Receive Unit of low noise amplifier or low noise amplifier rear end produced damages.Because the radiofrequency signal power that is transmitted is higher, though transmission/receiving key has the effect of decay, after the low noise amplifier amplification, the power that is produced may burn the internal circuit of radio receiving transmitting module.
Can improve the radiofrequency signal coupling problems though attenuator is set on RX path, this can increase the complexity of design cost and circuit structure.
The utility model content
The utility model proposes a kind of wireless transceiver circuit, it sets up a diverter switch on RX path again, and cooperates the transmitting-receiving action of wireless transceiver circuit that RX path is connected to earth terminal, improves the isolation of RX path by this.
The utility model proposes a kind of wireless transceiver circuit, comprise a Transmit-Receive Unit, a low noise amplifier, a power amplifier, one first switch and a second switch.Transmit-Receive Unit has an input and an output, and low noise amplifier is coupled to this input of Transmit-Receive Unit.Power amplifier is coupled to the output of Transmit-Receive Unit, and first switch is coupled between a receiving terminal, low noise amplifier and the earth terminal, in order to receiving terminal is electrically connected to earth terminal or low noise amplifier.Second switch is coupled to receiving terminal, power amplifier and an antenna, in order to antenna is electrically connected to receiving terminal or power amplifier.
Wherein, when second switch was electrically connected to power amplifier with antenna, first switch electrically connected receiving terminal to earth terminal.When second switch electrically connected antenna to receiving terminal, first switch was electrically connected to low noise amplifier with receiving terminal.
The utility model proposes a kind of wireless transceiver circuit in addition, comprises a Transmit-Receive Unit, a low noise amplifier, a power amplifier, one first switch and a second switch.Transmit-Receive Unit has an input and an output, and low noise amplifier is coupled to this input of this Transmit-Receive Unit.Power amplifier is coupled to this output of this Transmit-Receive Unit, and first switch is coupled between a receiving terminal, low noise amplifier and the earth terminal, in order to electrically connect low noise amplifier to receiving terminal or earth terminal.Second switch is coupled to receiving terminal, power amplifier and an antenna, in order to antenna is electrically connected to receiving terminal or power amplifier.
Wherein, when second switch electrically connected antenna to power amplifier, first switch electrically connected low noise amplifier to earth terminal.When second switch electrically connected antenna to receiving terminal, first switch electrically connected low noise amplifier to receiving terminal.
The utility model proposes a kind of wireless transceiver circuit again, comprises a Transmit-Receive Unit, a low noise amplifier, a power amplifier, one first switch and a second switch.Transmit-Receive Unit has an input and an output, and first switch is coupled to input, low noise amplifier and the earth terminal of Transmit-Receive Unit, in order to the input that electrically connects Transmit-Receive Unit to low noise amplifier or earth terminal.Power amplifier is coupled to the output of Transmit-Receive Unit, and second switch is coupled between low noise amplifier, power amplifier and the antenna, in order to electrically connect antenna to low noise amplifier or power amplifier.
Wherein, when second switch electrically connected antenna to power amplifier, this first switch electrically connected the input of Transmit-Receive Unit to earth terminal.When second switch electrically connected antenna to low noise amplifier, first switch electrically connected the input of Transmit-Receive Unit to low noise amplifier.
The utility model proposes a kind of wireless transceiver circuit in addition, comprises a Transmit-Receive Unit, a low noise amplifier, a power amplifier, one first switch and a second switch.Transmit-Receive Unit has an input and an output, and first switch is coupled to input, low noise amplifier and the earth terminal of Transmit-Receive Unit, in order to electrically connect input or the earth terminal of low noise amplifier to Transmit-Receive Unit.Power amplifier is coupled to the output of Transmit-Receive Unit, and second switch is coupled between low noise amplifier, power amplifier and the antenna, in order to electrically connect antenna to low noise amplifier or power amplifier.
Wherein, when second switch electrically connected antenna to power amplifier, first switch electrically connected low noise amplifier to earth terminal.When second switch electrically connected antenna to low noise amplifier, first switch electrically connected the input of low noise amplifier to Transmit-Receive Unit.
Based on above-mentioned, the utility model is except transmission/receiving key, on the RX path of signal, set up a switch, increase isolation by two switches, the radiofrequency signal of avoiding wireless transceiver circuit to transmit is coupled to the internal circuit of wireless transceiver circuit via RX path and causes circuit to damage.In addition, the switch of being set up on the RX path can cooperate the transmission action of wireless transceiver circuit that RX path is coupled to earth terminal, isolation effect that can more effective raising signal.The utility model only utilizes a switch just can reach the technology effect that promotes isolation, and its circuit design is quite simplified and be practical.
For above-mentioned feature and advantage of the present utility model can be become apparent, embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is the wireless transceiver circuit figure according to the utility model first embodiment.
Fig. 2 is the wireless transceiver circuit figure according to the utility model second embodiment.
Fig. 3 is the wireless transceiver circuit figure according to the utility model the 3rd embodiment.
Fig. 4 is according to wireless transceiver circuit figure of the present utility model.
Embodiment
First embodiment
Fig. 1 is the wireless transceiver circuit figure according to the utility model first embodiment, and wireless transceiver circuit 100 comprises Transmit-Receive Unit 110, low noise amplifier 120, power amplifier 130, first switch 140, second switch 150 and antenna 160.Transmit-Receive Unit 110 has input Tin and output Tout, is respectively coupled to input, receiving terminal RT and earth terminal GND that low noise amplifier 120 and power amplifier 130, the first switches 140 are coupled to low noise amplifier 120.Second switch 150 is coupled to the output of receiving terminal RT, antenna 160 and power amplifier 130.
Because first switch 140 (for example-25dB) all has isolation effect with second switch 150, therefore first switch 140 can be used to the radiofrequency signal that isolated power amplifier 130 is exported with second switch 150, avoids high-power radiofrequency signal to be coupled to the input of low noise amplifier 120 and damages Transmit-Receive Unit 110.If first switch 140 all has with second switch 150-isolation of 25dB, then the radiofrequency signal exported of power amplifier 130 can for example be decayed to-23dBm by 27dBm earlier by first switch 140 and second switch 150 decay 50dBm before being coupled to low noise amplifier 120.Even the radiofrequency signal of power can not influence Transmit-Receive Unit 110 after amplifying via low noise amplifier 120 yet like this.
In addition, it should be noted that first switch 140 can be electrically connected at receiving terminal RT earth terminal GND rather than make receiving terminal RT suspension joint (floating) when wireless transceiver circuit 100 transmits radiofrequency signal.Such connected mode can more effective raising first switch 140 isolation.In another embodiment of the utility model, first switch 140 among above-mentioned Fig. 1 also can utilize different set-up modes to implement, and has the effect that increases isolation equally, and its set-up mode further is described as follows with second embodiment.
Second embodiment
Please refer to Fig. 2, Fig. 2 is the wireless transceiver circuit figure according to the utility model second embodiment, and wherein the main difference of Fig. 2 and Fig. 1 is first switch 240.In Fig. 2, first switch 240 in the wireless transceiver circuit 200 is coupled to low noise amplifier 120, receiving terminal RT and earth terminal GND.When second switch 150 electrically connected antenna 160 to power amplifier 130, first switch 140 can electrically connect the input of low noise amplifiers 120 to earth terminal GND.When second switch 150 electrically connects antennas 160 to receiving terminal RT, the input that first switch can electrically connect low noise amplifier 120 to receiving terminal RT with the received radiofrequency signal of reception antenna 160.
That is to say that first switch 240 can be when wireless transceiver circuit 200 transmits radiofrequency signals, the input of low noise amplifier 120 is connected to earth terminal GND to increase isolation.Though the connected mode and the start of first switch 240 and first switch 140 are slightly different, Fig. 2 and Fig. 1 set up a switch to increase isolation on RX path, and its RX path is coupled to earth terminal GND increases its isolation effect.Remaining circuit framework among Fig. 2 is identical with above-mentioned Fig. 1, and the present technique field has knows that usually the knowledgeable should know its circuit easily by inference via above-mentioned first embodiment and make flowing mode, is not repeated at this.
The 3rd embodiment
Above-mentioned first switch 140 also can be arranged between low noise amplifier 120 and the Transmit-Receive Unit 110, please refer to Fig. 3, and Fig. 3 is the wireless transceiver circuit figure according to the utility model the 3rd embodiment.Wherein the main difference of Fig. 3 and Fig. 1 is first switch 340.In Fig. 3, first switch 340 in the wireless transceiver circuit 300 is coupled to receiving terminal Tin, the low noise amplifier 120 and earth terminal GND of Transmit-Receive Unit 110.When second switch 150 electrically connect antennas 160 to power amplifier 130 when transmitting radiofrequency signal, the input Tin that first switch 340 can electrically connect Transmit-Receive Units 110 to earth terminal GND to increase the Signal Spacing degree.When second switch 150 electrically connects antenna 160 to low noise amplifier 120, the radiofrequency signal that the input Tin that first switch 340 can electrically connect Transmit-Receive Units 110 is received with reception antenna 160 to the output of low noise amplifier 120.
In the present embodiment, first switch 340 is arranged between Transmit-Receive Unit 110 and the low noise amplifier 120, equally provides dual isolation effect on the RX path of the signal of wireless transceiver circuit 300, i.e. first switch 340 and second switch 150.Remaining circuit framework among Fig. 3 is identical with above-mentioned Fig. 1, and the present technique field has knows that usually the knowledgeable should know its circuit by inference via the foregoing description easily and make flowing mode, is not repeated at this.
The 4th embodiment
First switch 340 among above-mentioned Fig. 3 also can utilize different set-up modes to implement, and has the effect that increases isolation equally, and its set-up mode further is described as follows with Fig. 4.Fig. 4 is according to wireless transceiver circuit figure of the present utility model.Wherein the main difference of Fig. 4 and Fig. 3 is first switch 440.In Fig. 4, first switch 440 in the wireless transceiver circuit 400 is coupled to receiving terminal Tin, the low noise amplifier 120 and earth terminal GND of Transmit-Receive Unit 110.When second switch 150 electrically connect antennas 160 to power amplifier 130 when transmitting radiofrequency signal, first switch 440 can electrically connect the output of low noise amplifiers 120 to earth terminal GND.When second switch 150 electrically connects antenna 160 to low noise amplifier 120, the radiofrequency signal that the output that first switch 440 can electrically connect low noise amplifiers 120 is received with reception antenna 160 to the input Tin of Transmit-Receive Unit 110.
Remaining circuit framework among Fig. 4 is identical with above-mentioned Fig. 3, and the present technique field has knows that usually the knowledgeable should know its circuit easily by inference via the foregoing description and make flowing mode, is not repeated at this.In addition, by the foregoing description as can be known, first switch of the present utility model optionally is arranged at the front and back end of low noise amplifier, and it also has different set-up modes with the relation that couples of earth terminal, no matter yet which kind of set-up mode all can allow the RX path of wireless transceiver circuit have the isolation of two switches, avoid radiofrequency signal to be coupled to RX path and damage the inner member of wireless transceiver circuit by transfer path.
In sum, the utility model is set up a switch and is isolated radiofrequency signal on the RX path of wireless transceiver circuit, can decay by this and be damaged the inner member of wireless transceiver circuit by the power of the radiofrequency signal of low noise amplifier that transfer path is coupled to the radiofrequency signal of avoiding coupling.Because circuit structure of the present utility model is simplified, so its manufacturing cost is lower and easy enforcement, therefore quite has using value.
Though the utility model discloses as above with embodiment; right its is not in order to limit the utility model; have in the technical field under any and know the knowledgeable usually; in not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, so protection range of the present utility model is worked as with being as the criterion that claim was defined.
Claims (8)
1. a wireless transceiver circuit is characterized in that, comprising:
One Transmit-Receive Unit has an input and an output;
One low noise amplifier is coupled to this input of this Transmit-Receive Unit;
One power amplifier is coupled to this output of this Transmit-Receive Unit;
One first switch is coupled to a receiving terminal, this low noise amplifier and an earth terminal, in order to electrically connect this receiving terminal to this earth terminal or this low noise amplifier; And
One second switch is coupled to this receiving terminal, this power amplifier and an antenna, in order to electrically connect this antenna to this receiving terminal or this power amplifier.
2. wireless transceiver circuit as claimed in claim 1 is characterized in that, when this second switch electrically connected this antenna to this power amplifier, this first switch electrically connected this receiving terminal to this earth terminal; When this second switch electrically connected this antenna to this receiving terminal, this first switch electrically connected this receiving terminal to this low noise amplifier.
3. a wireless transceiver circuit is characterized in that, comprising:
One Transmit-Receive Unit has an input and an output;
One low noise amplifier is coupled to this input of this Transmit-Receive Unit;
One power amplifier is coupled to this output of this Transmit-Receive Unit;
One first switch is coupled to a receiving terminal, this low noise amplifier and an earth terminal, in order to electrically connect this low noise amplifier to this receiving terminal or this earth terminal; And
One second switch is coupled to this receiving terminal, this power amplifier and an antenna, in order to electrically connect this antenna to this receiving terminal or this power amplifier.
4. wireless transceiver circuit as claimed in claim 3 is characterized in that, when this second switch electrically connected this antenna to this power amplifier, this first switch electrically connected this low noise amplifier to this earth terminal; When this second switch electrically connected this antenna to this receiving terminal, this first switch electrically connected this low noise amplifier to this receiving terminal.
5. a wireless transceiver circuit is characterized in that, comprising:
One Transmit-Receive Unit has an input and an output;
One first switch is coupled to this input, a low noise amplifier and an earth terminal of this Transmit-Receive Unit, in order to this input of electrically connecting this Transmit-Receive Unit to this low noise amplifier or this earth terminal;
One power amplifier is coupled to this output of this Transmit-Receive Unit; And
One second switch is coupled to this low noise amplifier, this power amplifier and an antenna, in order to electrically connect this antenna to this low noise amplifier or this power amplifier.
6. wireless transceiver circuit as claimed in claim 5 is characterized in that, when this second switch electrically connected this antenna to this power amplifier, this first switch electrically connected this input of this Transmit-Receive Unit to this earth terminal; When this second switch electrically connected this antenna to this low noise amplifier, this first switch electrically connected this input of this Transmit-Receive Unit to this low noise amplifier.
7. a wireless transceiver circuit is characterized in that, comprising:
One Transmit-Receive Unit has an input and an output;
One first switch is coupled to this input, a low noise amplifier and an earth terminal of this Transmit-Receive Unit, in order to electrically connect this input or this earth terminal of this low noise amplifier to this Transmit-Receive Unit;
One power amplifier is coupled to this output of this Transmit-Receive Unit; And
One second switch is coupled to this low noise amplifier, this power amplifier and an antenna, in order to electrically connect this antenna to this low noise amplifier or this power amplifier.
8. wireless transceiver circuit as claimed in claim 7 is characterized in that, when this second switch electrically connected this antenna to this power amplifier, this first switch electrically connected this low noise amplifier to this earth terminal; When this second switch electrically connected this antenna to this low noise amplifier, this first switch electrically connected this low noise amplifier this input to this Transmit-Receive Unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202864008U CN201590817U (en) | 2009-12-25 | 2009-12-25 | Wireless transmitting and receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202864008U CN201590817U (en) | 2009-12-25 | 2009-12-25 | Wireless transmitting and receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590817U true CN201590817U (en) | 2010-09-22 |
Family
ID=42750612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202864008U Expired - Lifetime CN201590817U (en) | 2009-12-25 | 2009-12-25 | Wireless transmitting and receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954052A (en) * | 2014-03-28 | 2015-09-30 | 国基电子（上海）有限公司 | Multiple-input multiple-output antenna transmitting-receiving circuit |
| CN114204958A (en) * | 2021-12-15 | 2022-03-18 | 中国电子科技集团公司第二十六研究所 | Radio frequency receiving and transmitting assembly, digital array system and anti-interference method thereof |
-
2009
- 2009-12-25 CN CN2009202864008U patent/CN201590817U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954052A (en) * | 2014-03-28 | 2015-09-30 | 国基电子（上海）有限公司 | Multiple-input multiple-output antenna transmitting-receiving circuit |
| CN104954052B (en) * | 2014-03-28 | 2018-08-07 | 国基电子（上海）有限公司 | Multi-input/output antenna transmission circuit |
| CN114204958A (en) * | 2021-12-15 | 2022-03-18 | 中国电子科技集团公司第二十六研究所 | Radio frequency receiving and transmitting assembly, digital array system and anti-interference method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |