CN210670067U - High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device - Google Patents
High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device Download PDFInfo
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- CN210670067U CN210670067U CN202020181630.4U CN202020181630U CN210670067U CN 210670067 U CN210670067 U CN 210670067U CN 202020181630 U CN202020181630 U CN 202020181630U CN 210670067 U CN210670067 U CN 210670067U
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Abstract
The utility model relates to a high linearity receiving and dispatching radio frequency switch with ESD protection, which comprises a transmitting circuit and a receiving circuit, wherein the receiving circuit comprises a receiving end inductor connected between an antenna end and a receiving parallel switch element connected between the receiving end and the ground and used for ESD protection; the transmitting circuit comprises a transmitting end first inductor connected between the transmitting end and the antenna end, a transmitting end second inductor and a transmitting end capacitor which are connected between the transmitting end and the ground after being connected in series, and a transmitting parallel switch element connected with the transmitting end second inductor in parallel. The high-linearity transceiving radio frequency switch with the ESD protection further comprises a matching circuit which is used for forming a parallel resonant loop with the first inductor of the transmitting terminal/the inductor of the receiving terminal and is connected between the line terminal and the ground. The utility model discloses still relate to the radio frequency transceiver who uses above-mentioned high linearity radio frequency switch who takes ESD protection. The utility model discloses the circuit constitutes simply, can reduce the loss that increases under the prerequisite that realizes ESD safeguard function to higher linearity has.
Description
Technical Field
The utility model relates to a radio frequency integrated circuit field, concretely relates to radio frequency switch, especially take high linearity radio frequency switch of ESD protection to relate to the radio frequency transceiver who uses above-mentioned high linearity radio frequency switch who takes ESD protection.
Background
The receiving and transmitting radio frequency switch consists of two switching circuits, one switching circuit is connected with the transmitter, the other switching circuit is connected with the receiver, and the two switching circuits are connected to the antenna end together. The switching circuit is composed of one or more switching devices connected in series and in parallel, and in modern integrated circuit applications, the switching devices are also implemented by semiconductor devices.
In a high linearity RF front-end module, the switching devices generate non-linear cross-talk modulation under certain conditions, thereby deteriorating linearity. Meanwhile, the PAD connected with the antenna terminal also needs to be added with corresponding ESD protection. The implementation mode enables more devices to be arranged between the radio frequency transceiver and the antenna, insertion loss is increased, circuit implementation is complicated, and the added ESD device also has the problem of linearity.
Disclosure of Invention
The utility model aims at providing a circuit is simple, the loss is lower and the higher high linearity degree receiving and dispatching radio frequency switch of taking ESD protection of linearity.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a high-linearity receiving and transmitting radio frequency switch with ESD protection is respectively connected with a transmitter, a receiver and an antenna, the high-linearity receiving and transmitting radio frequency switch with ESD protection comprises a transmitting circuit connected between the transmitter and the antenna and a receiving circuit connected between the antenna and the receiver, the transmitting circuit is connected with the transmitter through a transmitting end, the receiver is connected with the receiving circuit through a receiving end, the transmitting circuit and the receiving circuit are both connected with the antenna through an antenna end, the radio frequency switch with ESD protection has a transmitting state and a receiving state, the receiving circuit comprises a receiving end inductor and a receiving parallel switch element used for ESD protection, a first end of the receiving end inductor is connected with the receiving end, and the receiving end inductor is connected with the antenna end opposite to a second end, the receiving parallel switch element is connected between the receiving end and the ground, and the control end of the receiving parallel switch element forms the control end of the receiving circuit; the transmitting circuit comprises a transmitting end first inductor, a transmitting end second inductor, a transmitting end capacitor and a transmitting parallel switch element, wherein the first end of the transmitting end first inductor is connected with the transmitting end, the second end of the transmitting end first inductor is connected with the antenna end, the first end of the transmitting end capacitor is connected with the transmitting end, the transmitting end second inductor is connected between the second end of the transmitting end capacitor and the ground, the transmitting parallel switch element is connected between the second end of the transmitting end capacitor and the ground, and the control end of the transmitting parallel switch element forms the control end of the transmitting circuit; the high-linearity transceiving radio frequency switch with the ESD protection further comprises a matching circuit which forms a parallel resonance loop with the first inductor of the transmitting terminal in the receiving state and forms a parallel resonance loop with the inductor of the receiving terminal in the transmitting state, and the matching circuit is connected between the antenna terminal and the ground.
The matching circuit includes a matching capacitor.
The transmitting parallel switch element and the receiving parallel switch element are MOSFET devices, pHEMT devices, HBT devices or HB T devices.
The utility model provides a simple, lower and the higher radio frequency transceiver of linearity of circuit.
In one scheme, the radio frequency transceiver device comprises a transmitter, a receiver, an antenna and a transceiver radio frequency switch, wherein the transmitter, the receiver and the antenna are respectively connected with the transceiver radio frequency switch, the receiver comprises a low noise amplifier arranged behind the transceiver radio frequency switch, the transceiver radio frequency switch adopts the high linearity transceiver radio frequency switch with the ESD protection, and in the receiving state, the receiving end inductor is used as the input inductor of the low noise amplifier.
In another aspect, the radio frequency transceiver device includes a transmitter, a receiver, an antenna, and a radio frequency switch, where the transmitter, the receiver, and the antenna are respectively connected to the radio frequency switch, the transmitter includes a power amplifier disposed in front of the radio frequency switch, the radio frequency switch adopts the high linearity radio frequency switch with ESD protection, and in the transmitting state, the first inductor at the transmitting end and the capacitor at the transmitting end are used as part of an output matching network of the power amplifier.
And the output matching network of the power amplifier is a T-type network, a multi-level L-type network or a high-low-pass network.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model discloses the circuit constitutes simply, can reduce the loss that increases under the prerequisite that realizes ESD safeguard function to higher linearity has.
Drawings
Fig. 1 is a circuit diagram of a first embodiment of the present invention.
Fig. 2 is a circuit diagram of a second embodiment of the present invention.
Fig. 3 is a circuit diagram of a third embodiment of the present invention.
In the above drawings: 1. a receiving end inductor; 2. a transmitting end first inductor; 3. receiving a parallel switching element; 4. a matching capacitor; 5. a transmitting end capacitance; 6. a transmitting end second inductor; 7. transmitting the parallel switch element.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
The first embodiment is as follows: as shown in fig. 1, the high linearity transceiving rf switch with ESD protection has a transmitting terminal P2, a receiving terminal P1 and an antenna terminal P0, which are respectively connected to a transmitter, a receiver and an antenna, and have a transmitting state and a receiving state.
The high-linearity transceiving radio frequency switch with the ESD protection comprises a transmitting circuit and a receiving circuit. The transmitting circuit is connected between the transmitter and the antenna, i.e. between the transmitting terminal P2 and the antenna terminal P0, the transmitting circuit being connected to the transmitter via the transmitting terminal P2 and to the antenna via the antenna terminal P0. The receiver circuit is connected between the antenna and the receiver, i.e. between the antenna terminal P0 and the receiving terminal P1, the receiver being connected to the receiver circuit via the receiving terminal P1 and to the antenna via the antenna terminal P0.
The receiving circuit comprises a receiving side inductance 1 and a receiving parallel switch element 3, wherein the receiving parallel switch element 3 is a device used for ESD protection. The first terminal of the receiving end inductor 1 is connected with the receiving end P1, the second terminal of the receiving end inductor 1 is connected with the antenna end P0, the receiving parallel switch element 3 is connected between the receiving end P1 and the ground, and the control end SW1 of the receiving parallel switch element 3 forms the control end of the receiving circuit.
The transmitting circuit comprises a transmitting end first inductor 2, a transmitting end second inductor 6, a transmitting end capacitor 5 and a transmitting parallel switch element 7. The first end of the first inductor 2 of the transmitting end is connected with a transmitting end P2, the second end of the first inductor 2 of the transmitting end is connected with an antenna end P0, the first end of the capacitor 5 of the transmitting end is connected with a transmitting end P2, the second inductor 6 of the transmitting end is connected between the second end of the capacitor 5 of the transmitting end and the ground, the transmitting parallel switch element 7 is connected between the second end of the capacitor 5 of the transmitting end and the ground, namely the second inductor 6 of the transmitting end is connected with the transmitting parallel switch element 7 in parallel, and the control end SW2 of the transmitting parallel switch element 7 forms the control end of the transmitting circuit.
The high-linearity transceiving radio frequency switch with the ESD protection further comprises a matching circuit, wherein the matching circuit is connected between an antenna end P0 and the ground and is used for forming a parallel resonant loop with a first inductor 2 at a transmitting end in a receiving state and forming a parallel resonant loop with an inductor 1 at a receiving end in a transmitting state. In this embodiment, the matching circuit includes a matching capacitor 4.
In the above scheme, the transmitting parallel switch element 2 and the receiving parallel switch element 1 are MOSFET devices, pHEMT devices, HBT devices, HB devices or other semiconductor devices.
For the receive circuit, SW1 is its control port. When a low level is applied to the SW1, the receiving parallel switch element 3 is in an off state, and a radio frequency signal can be transmitted to the receiving terminal P1 through the antenna terminal P0 and the receiving terminal inductor 1. The receiving parallel switch element 3 is also used as an ESD device, and is switched on through the receiving end inductor 1 and the antenna end P0 on the direct current, so as to provide ESD protection for the devices on the whole antenna end P0, the receiving end P1 and the transmitting end P2. When a high level is applied to the SW1, the receiving parallel switch element 3 is in a conducting state, which shorts the signal path of the receiving terminal P1 to ground, equivalently, the receiving terminal P1 is disconnected, and at this time, the receiving terminal inductor 1 and the matching capacitor 4 form a parallel resonant circuit, which operates at the center frequency f 0.
For transmit circuitry, SW2 has it control port. When a low level is applied to the SW2, the transmitting parallel switch element 7 is in an off state, and the transmitting side capacitor 5 and the transmitting side second inductor 6 form a series resonant circuit and resonate at the center frequency f 0. In this state, the antenna terminal P0 and the transmission terminal P2 are disconnected. When a high level is applied to the SW2, the transmitting shunt switch element 7 is in a conducting state, bypasses the transmitting end second inductor 6, and is equivalent to the transmitting end capacitor 5 connected to the ground.
In summary, when the control terminal SW2 of the transmitting parallel switch element 7 and the control terminal SW1 of the receiving parallel switch element 3 are both applied with a low level, the transmitting parallel switch element 7 and the receiving parallel switch element 3 are both turned off, and the high linearity transceiving rf switch with ESD protection is in a receiving state. When a high level is applied to the control terminal SW2 of the transmitting parallel switch element 7 and the control terminal SW1 of the receiving parallel switch element 3, both the transmitting parallel switch element 7 and the receiving parallel switch element 3 are turned on, and the high-linearity transceiving radio frequency switch with ESD protection is in a transmitting state. Since all the switching devices, the receiving parallel switching element 3 and the transmitting parallel switching element 7, are in the on state in the transmitting state, when the power signal of the power amplifier is transmitted through these devices, an additional crosstalk signal is hardly generated, and high linearity of the transmitting state is achieved.
Example two: as shown in fig. 2, a radio frequency transceiver includes a transmitter, a receiver, an antenna, and a radio frequency switch, wherein the transmitter, the receiver, and the antenna are respectively connected to the radio frequency switch. The receiving and transmitting radio frequency switch adopts the high-linearity receiving and transmitting radio frequency switch with the ESD protection in the first embodiment.
In most receivers, a Low Noise Amplifier (LNA) is the first circuit module after the rf switch, and an inductor Lg is used as an input inductor of the LNA in the structure of the LNA. Therefore, in the rf transceiver of the present embodiment, the receiver includes a Low Noise Amplifier (LNA) disposed after the transmit-receive rf switch, and the receive-end inductor 1 of the high linearity transmit-receive rf switch with ESD protection is used as the input inductor Lg of the low noise amplifier LNA in the receive state.
Example three: as shown in fig. 3, a radio frequency transceiver includes a transmitter, a receiver, an antenna, and a radio frequency switch, wherein the transmitter, the receiver, and the antenna are respectively connected to the radio frequency switch. The receiving and transmitting radio frequency switch adopts the high-linearity receiving and transmitting radio frequency switch with the ESD protection in the first embodiment.
The transmitter comprises a Power Amplifier (PA) arranged in front of a transceiving radio frequency switch, and a transmitting end first inductor 2 and a transmitting end capacitor 5 are used as a part of an output matching network of the power amplifier when the high-linearity transceiving radio frequency switch with ESD protection is in a transmitting state. The output matching network of the power amplifier is a T-type network, a multi-level L-type network or a high-low pass network, and is shown in fig. 3 as a high-low pass network type.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. A high-linearity receiving and transmitting radio frequency switch with ESD protection is respectively connected with a transmitter, a receiver and an antenna, the high-linearity receiving and transmitting radio frequency switch with ESD protection comprises a transmitting circuit connected between the transmitter and the antenna and a receiving circuit connected between the antenna and the receiver, the transmitting circuit is connected with the transmitter through a transmitting end, the receiver is connected with the receiving circuit through a receiving end, the transmitting circuit and the receiving circuit are both connected with the antenna through an antenna end, and the radio frequency switch with ESD protection has a transmitting state and a receiving state, and is characterized in that: the receiving circuit comprises a receiving end inductor and a receiving parallel switch element used for ESD protection, wherein a first end of the receiving end inductor is connected with the receiving end, a second end of the receiving end inductor is connected with the antenna end, the receiving parallel switch element is connected between the receiving end and the ground, and a control end of the receiving parallel switch element forms a control end of the receiving circuit; the transmitting circuit comprises a transmitting end first inductor, a transmitting end second inductor, a transmitting end capacitor and a transmitting parallel switch element, wherein the first end of the transmitting end first inductor is connected with the transmitting end, the second end of the transmitting end first inductor is connected with the antenna end, the first end of the transmitting end capacitor is connected with the transmitting end, the transmitting end second inductor is connected between the second end of the transmitting end capacitor and the ground, the transmitting parallel switch element is connected between the second end of the transmitting end capacitor and the ground, and the control end of the transmitting parallel switch element forms the control end of the transmitting circuit; the high-linearity transceiving radio frequency switch with the ESD protection further comprises a matching circuit which forms a parallel resonance loop with the first inductor of the transmitting terminal in the receiving state and forms a parallel resonance loop with the inductor of the receiving terminal in the transmitting state, and the matching circuit is connected between the antenna terminal and the ground.
2. The ESD protected high linearity transceiver radio frequency switch of claim 1, wherein: the matching circuit includes a matching capacitor.
3. The ESD protected high linearity transceiver radio frequency switch of claim 1, wherein: the transmitting parallel switch element and the receiving parallel switch element are MOSFET devices, pHEMT devices, HBT devices or HB T devices.
4. A radio frequency transceiver comprises a transmitter, a receiver, an antenna and a radio frequency receiving and transmitting switch, wherein the transmitter, the receiver and the antenna are respectively connected with the radio frequency receiving and transmitting switch, and the receiver comprises a low noise amplifier arranged behind the radio frequency receiving and transmitting switch, and is characterized in that: the high linearity receiving and transmitting radio frequency switch with ESD protection of any claim 1 to 3 is adopted as the receiving end inductor, and in the receiving state, the receiving end inductor is used as the input inductor of the low noise amplifier.
5. A radio frequency transceiver device comprises a transmitter, a receiver, an antenna and a radio frequency receiving and transmitting switch, wherein the transmitter, the receiver and the antenna are respectively connected with the radio frequency receiving and transmitting switch, the transmitter comprises a power amplifier arranged in front of the radio frequency receiving and transmitting switch, and the radio frequency receiving and transmitting device is characterized in that: the high linearity transmit-receive RF switch with ESD protection of any one of claims 1 to 3 is adopted as the transmit-receive RF switch, and in the transmitting state, the transmit-end first inductor and the transmit-end capacitor are used as a part of an output matching network of the power amplifier.
6. The radio frequency transceiver device according to claim 5, wherein: and the output matching network of the power amplifier is a T-type network, a multi-level L-type network or a high-low-pass network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020181630.4U CN210670067U (en) | 2020-02-18 | 2020-02-18 | High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020181630.4U CN210670067U (en) | 2020-02-18 | 2020-02-18 | High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device |
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| CN210670067U true CN210670067U (en) | 2020-06-02 |
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| CN202020181630.4U Active CN210670067U (en) | 2020-02-18 | 2020-02-18 | High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111193527A (en) * | 2020-02-18 | 2020-05-22 | 江苏集萃智能集成电路设计技术研究所有限公司 | High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device |
| CN113972925A (en) * | 2020-07-23 | 2022-01-25 | 广州昂瑞微电子技术有限公司 | Radio frequency transceiving switch circuit, radio frequency front-end circuit and radio frequency transceiver |
-
2020
- 2020-02-18 CN CN202020181630.4U patent/CN210670067U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111193527A (en) * | 2020-02-18 | 2020-05-22 | 江苏集萃智能集成电路设计技术研究所有限公司 | High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device |
| CN111193527B (en) * | 2020-02-18 | 2024-04-16 | 江苏集萃智能集成电路设计技术研究所有限公司 | High-linearity receiving and transmitting radio frequency switch with ESD protection and radio frequency receiving and transmitting device |
| CN113972925A (en) * | 2020-07-23 | 2022-01-25 | 广州昂瑞微电子技术有限公司 | Radio frequency transceiving switch circuit, radio frequency front-end circuit and radio frequency transceiver |
| CN113972925B (en) * | 2020-07-23 | 2022-12-09 | 广州昂瑞微电子技术有限公司 | Radio frequency transceiving switch circuit, radio frequency front-end circuit and radio frequency transceiver |
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