CN104682992A - Circuit structure of wireless receiving-transmitting chip - Google Patents
Circuit structure of wireless receiving-transmitting chip Download PDFInfo
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- CN104682992A CN104682992A CN201510030293.2A CN201510030293A CN104682992A CN 104682992 A CN104682992 A CN 104682992A CN 201510030293 A CN201510030293 A CN 201510030293A CN 104682992 A CN104682992 A CN 104682992A
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- side inductance
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Abstract
The invention provides a circuit structure of a wireless receiving-transmitting chip. A secondary side inductor of a transformer in a transmitting circuit is matched with a filter capacitor to form a notch filter, and the notch filter is used for filtering an image frequency signal. Furthermore, an electrostatic discharging protection circuit and the filter capacitor are arranged in parallel and can be used for preventing interfering the efficiency of the receiving-transmitting chip. Therefore, by virtue of the circuit structure of the wireless receiving-transmitting chip, the efficiency of the receiving-transmitting chip can be improved and the manufacturing cost can be reduced.
Description
Technical field
The present invention relates to a kind of circuit structure of radio transmitting and receiving chip, particularly relate to and a kind ofly improve usefulness and reduce costs the circuit structure of radio transmitting and receiving chip.
Background technology
Referring to Fig. 1, is the schematic diagram of existing wireless transceiver circuit.The configuration of wireless transceiver circuit 10 includes transceiving chip 12 and an antenna usually.Wherein, transceiving chip 12 includes radiating circuit 121 and a receiving circuit 123, and selects by a diverter switch 125 signal path connecting transmitting-receiving contact 129.In order to the image frequency signal in filtering wireless signal, need in wireless transceiver circuit 10 to arrange a notch filter 16, utilize inductor 161 and the combination of capacitor 163, contain the image frequency signal of carrier wave frequency range in order to filtering.
But, if notch filter 16 is arranged in transceiving chip 12, will the cost of chip manufacturing be increased.If notch filter 16 is arranged on circuit board, then it is the manufacturing cost increasing system manufacturer.
In addition, in order to prevent static discharge from injuring transceiving chip 12 inner member, usually an electrostatic storage deflection (ESD) protection circuit 127 can be set between transmitting-receiving contact 129 and ground contact 128, when static discharge occurs, safe discharge path can be provided.
But, no matter Received signal strength or transmit, transmitting-receiving contact 129 be all signal must through approach, the setting of electrostatic storage deflection (ESD) protection circuit 127, stray inductance or electric capacity will be formed, in any case all adverse influence can be caused to the usefulness of transceiving chip 12 on signal path.
Therefore, how properly to design the configuration of transmission circuit, and can reduce integral manufacturing cost, and improve transmitting-receiving usefulness, real is industry problem urgently to be resolved hurrily.
Summary of the invention
There is mirror in the problems referred to above, the object of the invention is to the circuit structure proposing a kind of radio transmitting and receiving chip, utilize the secondary side inductance of transformer in radiating circuit to coordinate a filtering capacitor to form a notch filter, in order to filtering image frequency signal.
The circuit structure of radio transmitting and receiving chip of the present invention, comprises: a transmitting-receiving contact, in order to connect an antenna; One ground contact, in order to ground connection; One radiating circuit, has a transformer, and this transformer includes a primary side inductance and a secondary side inductance, and this secondary side inductance has a first end and one second end, and wherein this first end connects this transmitting-receiving contact; Wherein, this radiating circuit transmits in order to strengthen one, and makes this transmit by this antenna transmission; One receiving circuit, connects first end and second end of this secondary side inductance, in order to receive a Received signal strength by this antenna; One commutation circuit, is located between this receiving circuit and this secondary side inductance, in order to switching signal path; And a filtering capacitor, its one end connects the second end of this secondary side inductance, and the other end connects this ground contact.
In one embodiment, more include an electrostatic storage deflection (ESD) protection circuit, be arranged in parallel with this filtering capacitor.
In one embodiment, more include a resistor, be arranged in parallel with this filtering capacitor.
In one embodiment, commutation circuit includes a switch element, connects first end and second end of this secondary side inductance.
In one embodiment, receiving circuit includes a filter unit.
In one embodiment, filter unit includes a capacitor and an inductor of serial connection.
In one embodiment, commutation circuit includes one first switch element and a second switch unit, connects the inductor ends of filter unit and the second end of secondary side inductance respectively.
Based on above-mentioned, the circuit structure of radio transmitting and receiving chip of the present invention, utilizes the secondary side inductance of transformer in radiating circuit to coordinate a filtering capacitor to form a notch filter, in order to filtering image frequency signal, the usefulness of radio transmitting and receiving chip can be improved, and its cost of manufacture can be reduced.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing wireless transceiver circuit;
Fig. 2 is the schematic diagram of one embodiment of the invention;
Fig. 3 is path schematic diagram embodiment illustrated in fig. 2;
Fig. 4 is the schematic diagram of another embodiment of the present invention.
Primary clustering symbol description:
10 wireless transceiver circuit 12 transceiving chips
121 radiating circuit 123 receiving circuits
125 diverter switch 127 electrostatic storage deflection (ESD) protection circuit
128 ground contacts 129 receive and dispatch contact
14 antenna 16 notch filters
161 inductor 163 capacitors
20 radio transmitting and receiving chips 201 receive and dispatch contact
203 ground contact 205 antennas
22 radiating circuit 221 transformers
223 primary side inductance 225 secondary side inductance
227 first end 229 second ends
24 commutation circuit 241 switch elements
26 receiving circuit 281 filtering capacitors
283 electrostatic storage deflection (ESD) protection circuit 285 resistors
32 signal path 34 electrostatic discharging paths
40 radio transmitting and receiving chip 44 commutation circuits
441 first switch element 443 second switch unit
46 receiving circuit 48 filter units
481 capacitor 483 inductors
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.Identical symbology has component or the device of identical or similar functions.Connect or link and represent directly or indirectly connection.
Referring to Fig. 2 and Fig. 3, is schematic diagram and the path schematic diagram of one embodiment of the invention respectively.As shown in the figure, the circuit structure of radio transmitting and receiving chip 20 of the present invention includes transmitting-receiving contact 201, ground contact 203, radiating circuit 22, receiving circuit 26, commutation circuit 24 and a filtering capacitor 281.Wherein, transmitting-receiving contact 201 is in order to connect an antenna 205, and ground contact 203 is in order to ground connection.
Radiating circuit 22 transmits in order to strengthen one, and makes this transmit being launched by this antenna 205.Radiating circuit 22 of the present invention has a transformer 221, and this transformer 221 includes primary side inductance 223 and a secondary side inductance 225, and this secondary side inductance 225 has first end 227 and one second end 229.Wherein, the first end 227 of secondary side inductance 225 connects the one end of receiving and dispatching contact 201, second end 229 and connecting filtering capacitor 281, and the other end of filtering capacitor 281 connects ground contact 203.Transmit after radiating circuit 22 power amplification, be coupled to secondary side inductance 225 via transformer 221 primary side inductance 223, launched by antenna 205 by transmitting-receiving contact 201.
The first end 227 of receiving circuit 26 connecting secondary side inductance 225 and the second end 229, receive a Received signal strength by transmitting-receiving contact 201 by antenna 205.Commutation circuit 24 is located between receiving circuit 26 and secondary side inductance 225, in order to switching signal path.
In the circuit structure of radio transmitting and receiving chip 20 of the present invention, utilize the secondary side inductance 225 of transformer 221 to form a notch filter with filtering capacitor 281, the function of filtering image frequency signal can be arrived.Utilize radio transmitting and receiving chip 20 of the present invention, when Received signal strength, image frequency signal directly to lead earth terminal by the signal path 32 that secondary side inductance 225 and filtering capacitor 281 are formed, as shown in Figure 2, without the need to additional element, overall cost of manufacture can be reduced.
In one embodiment of this invention, radio transmitting and receiving chip 20 more can include a static discharge (Electrostatic Discharge, ESD) protection circuit 283, is arranged in parallel, uses the effect providing electrostatic discharge protective with filtering capacitor 281.Utilize radio transmitting and receiving chip 20 of the present invention, when there is static discharge, electric current to lead earth terminal by the electrostatic discharging path 34 that secondary side inductance 225 and electrostatic storage deflection (ESD) protection circuit 283 are formed, as shown in Figure 2.Because electrostatic storage deflection (ESD) protection circuit 283 of the present invention does not connect transmitting-receiving contact 201, not on signal transmitting and receiving path, therefore can the impact for transmitting-receiving usefulness be dropped to minimum.
In one embodiment of this invention, this commutation circuit 24 includes a switch element 241, the first end 227 of connecting secondary side inductance 225 and the second end 229.When radio transmitting and receiving chip 20 Received signal strength, radiating circuit 22 is closed, and switch element 241 is open circuit, and Received signal strength enters receiving circuit 26 by antenna 205 through transmitting-receiving contact 201.When radio transmitting and receiving chip 20 transmits, receiving circuit 26 is closed, and switch element 241 is short circuit, transmits after radiating circuit 22 power amplification, be coupled to secondary side inductance 225 by primary side inductance 223, and launched by antenna 205 by transmitting-receiving contact 201.
In one embodiment of this invention, radio transmitting and receiving chip 20 more includes a resistor 285, is arranged in parallel with filtering capacitor 281, in order to provide receiving circuit 26 1 reference potential.
Referring to Fig. 4, is the schematic diagram of another embodiment of the present invention.As shown in the figure, the circuit structure of the present embodiment radio transmitting and receiving chip 40 is roughly the same with embodiment illustrated in fig. 2, and only, the present embodiment receiving circuit 46 has a filter unit 48, connect transmitting-receiving contact 201 and the first end 227 of secondary side inductance 225, in order to filter the frequency range of institute's wish Received signal strength.This filter unit 48 includes capacitor 481 and an inductor 483.The commutation circuit 44 of the present embodiment includes one first switch element 441 and a second switch unit 443, and each switch element 441,443 connects the two ends of filter unit 48 inductor 483 and the second end 229 of secondary side inductance 225 respectively.
In the present embodiment, when radio transmitting and receiving chip 40 Received signal strength, radiating circuit 22 is closed, and in commutation circuit 44, the first switch element 441 and second switch unit 443 are open circuit, and Received signal strength enters receiving circuit 46 by antenna 205 through transmitting-receiving contact 201.When radio transmitting and receiving chip 40 transmits, receiving circuit 46 is closed, the first switch element 441 in commutation circuit 44 and second switch unit 443 are short circuit, transmit after radiating circuit 22 power amplification, be coupled to secondary side inductance 225 by primary side inductance 223, and launched by antenna 205 by transmitting-receiving contact 201.
Because the secondary side inductance 225 of notch filter of the present invention by transformer 221 forms with filtering capacitor 281, do not need additionally to arrange the effect that inductor can reach filtering image frequency signal, overall cost of manufacture can be reduced.In addition, electrostatic storage deflection (ESD) protection circuit of the present invention 283 and filtering capacitor 281 are arranged in parallel, not launch or Received signal strength path on, the impact for radio transmitting and receiving chip usefulness can be reduced.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (7)
1. a circuit structure for radio transmitting and receiving chip, is characterized in that, comprises:
One transmitting-receiving contact, in order to connect an antenna;
One ground contact, in order to ground connection;
One radiating circuit, has a transformer, and this transformer includes a primary side inductance and a secondary side inductance, and this secondary side inductance has a first end and one second end, and wherein this first end connects this transmitting-receiving contact; Wherein, this radiating circuit transmits in order to strengthen one, and makes this transmit by this antenna transmission;
One receiving circuit, connects first end and second end of this secondary side inductance, in order to receive a Received signal strength by this antenna;
One commutation circuit, is located between this receiving circuit and this secondary side inductance, in order to switching signal path; And
One filtering capacitor, its one end connects the second end of this secondary side inductance, and the other end connects this ground contact.
2. the circuit structure of radio transmitting and receiving chip according to claim 1, is characterized in that, more include an electrostatic storage deflection (ESD) protection circuit, be arranged in parallel with this filtering capacitor.
3. the circuit structure of radio transmitting and receiving chip according to claim 2, is characterized in that, more include a resistor, be arranged in parallel with this filtering capacitor.
4. the circuit structure of radio transmitting and receiving chip according to claim 1, it is characterized in that, described commutation circuit includes a switch element, connects first end and second end of this secondary side inductance.
5. the circuit structure of radio transmitting and receiving chip according to claim 4, it is characterized in that, described receiving circuit includes a filter unit.
6. the circuit structure of radio transmitting and receiving chip according to claim 1, it is characterized in that, described filter unit includes a capacitor and an inductor of serial connection.
7. the circuit structure of radio transmitting and receiving chip according to claim 1, it is characterized in that, described commutation circuit includes one first switch element and a second switch unit, connects the inductor two ends of filter unit and the second end of secondary side inductance respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510030293.2A CN104682992B (en) | 2015-01-22 | 2015-01-22 | The circuit of radio transmitting and receiving chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510030293.2A CN104682992B (en) | 2015-01-22 | 2015-01-22 | The circuit of radio transmitting and receiving chip |
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| Publication Number | Publication Date |
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| CN104682992A true CN104682992A (en) | 2015-06-03 |
| CN104682992B CN104682992B (en) | 2017-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510030293.2A Active CN104682992B (en) | 2015-01-22 | 2015-01-22 | The circuit of radio transmitting and receiving chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592593A (en) * | 2017-08-31 | 2018-01-16 | 广东欧珀移动通信有限公司 | Protection circuit, radio circuit and electronic equipment |
| CN109862138A (en) * | 2017-11-30 | 2019-06-07 | 北京小米移动软件有限公司 | Electronic equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003041277A2 (en) * | 2001-11-06 | 2003-05-15 | Renesas Technology Corp. | A communication semiconductor integrated circuit device and a wireless communication system |
| EP2109226A2 (en) * | 2008-04-10 | 2009-10-14 | Somfy SAS | Device for transmission and/or reception of radiosignals. |
| CN102176062A (en) * | 2011-02-23 | 2011-09-07 | 北京南风科创应用技术有限公司 | Multifunctional transmitter |
| CN102263572A (en) * | 2010-05-28 | 2011-11-30 | 创杰科技股份有限公司 | Wireless communication transceiver |
| CN102281081A (en) * | 2010-06-08 | 2011-12-14 | 创杰科技股份有限公司 | Wireless communication transceiver |
| CN101485085B (en) * | 2006-07-03 | 2013-03-13 | 日立金属株式会社 | Branch circuit, high frequency circuit and high frequency module |
| CN103227657A (en) * | 2013-03-25 | 2013-07-31 | 络达科技股份有限公司 | Radio frequency front-end module |
| CN103580710A (en) * | 2012-07-18 | 2014-02-12 | 中兴通讯股份有限公司 | TDD standard radio frequency receiving and sending circuit and method, radio frequency front end circuit and terminal |
-
2015
- 2015-01-22 CN CN201510030293.2A patent/CN104682992B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003041277A2 (en) * | 2001-11-06 | 2003-05-15 | Renesas Technology Corp. | A communication semiconductor integrated circuit device and a wireless communication system |
| CN101485085B (en) * | 2006-07-03 | 2013-03-13 | 日立金属株式会社 | Branch circuit, high frequency circuit and high frequency module |
| EP2109226A2 (en) * | 2008-04-10 | 2009-10-14 | Somfy SAS | Device for transmission and/or reception of radiosignals. |
| CN102263572A (en) * | 2010-05-28 | 2011-11-30 | 创杰科技股份有限公司 | Wireless communication transceiver |
| CN102281081A (en) * | 2010-06-08 | 2011-12-14 | 创杰科技股份有限公司 | Wireless communication transceiver |
| CN102176062A (en) * | 2011-02-23 | 2011-09-07 | 北京南风科创应用技术有限公司 | Multifunctional transmitter |
| CN103580710A (en) * | 2012-07-18 | 2014-02-12 | 中兴通讯股份有限公司 | TDD standard radio frequency receiving and sending circuit and method, radio frequency front end circuit and terminal |
| CN103227657A (en) * | 2013-03-25 | 2013-07-31 | 络达科技股份有限公司 | Radio frequency front-end module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592593A (en) * | 2017-08-31 | 2018-01-16 | 广东欧珀移动通信有限公司 | Protection circuit, radio circuit and electronic equipment |
| CN109862138A (en) * | 2017-11-30 | 2019-06-07 | 北京小米移动软件有限公司 | Electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104682992B (en) | 2017-06-20 |
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Address after: Science Park, Hsinchu, Taiwan, China Road 6-5, building 5 Patentee after: Dafa Technology Co.,Ltd. Address before: Science Park, Hsinchu, Taiwan, China Road 6-5, building 5 Patentee before: AIROHA TECHNOLOGY CORP. |