CN220985630U - Low noise amplifier and portable communication device - Google Patents
Low noise amplifier and portable communication device Download PDFInfo
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- CN220985630U CN220985630U CN202323031460.4U CN202323031460U CN220985630U CN 220985630 U CN220985630 U CN 220985630U CN 202323031460 U CN202323031460 U CN 202323031460U CN 220985630 U CN220985630 U CN 220985630U
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Abstract
The embodiment of the utility model provides a low-noise amplifier and portable communication equipment. The low noise amplifier includes: an input pin for receiving a radio frequency signal; an output pin for outputting an amplified radio frequency signal; a control pin receiving a first gain signal; a first grounding pin for receiving a second gain signal, wherein the high and low levels of the first gain signal and the high and low levels of the second gain signal are combined into different gain coefficients; and the low-noise amplifier circuit is electrically connected with the input pin, the output pin, the control pin and the first grounding pin, and the low-noise amplifier amplifies the radio frequency signal by using gain coefficients corresponding to the first gain signal and the second gain signal to obtain the amplified radio frequency signal. The scheme of the embodiment does not need to excessively increase the occupied area of the device, and realizes the functions of the low-noise amplifiers with different gains.
Description
Technical Field
Embodiments of the present utility model relate to the field of electronic circuits, and in particular, to a low noise amplifier and a portable communication device.
Background
The main function of the low noise amplifier (Low Noise Amplifier, LNA) is to reduce the loss and interference effect caused by the Long radio frequency transmission line from the antenna to the main chip, so as to improve the signal receiving sensitivity, for example, for the communication equipment of LTE (Long-Term Evolution) system, the miniaturization and flattening (for example, full screen) requirements of the devices of the communication equipment and the increase of the frequency band of Carrier Aggregation (CA) all bring great difficulty to the antenna design of the communication equipment, the antenna performance is reduced due to the space reduction and the environment complexity, and the signal quality received by the cell edge is difficult to be ensured, so that the additionally applied high performance LNA will be increasingly applied.
Generally, LNAs include high gain LNAs and low gain LNAs, with different gain LNAs each having the advantages required by the communication device, e.g., high gain LNAs facilitate higher signal-to-noise ratios of the processed signals, low gain LNAs facilitate processing capabilities of a wider range of signals, and less signal distortion.
However, the conventional high-gain LNA and low-gain LNA are different devices configured independently, and the devices themselves have high integration and coupling, so that the high-gain LNA or low-gain LNA configured independently has low cost and can reliably achieve signal amplification with a specific gain, but for portable communication equipment with high demands for device miniaturization and flattening, both the high-gain LNA and the low-gain LNA are required to be configured, resulting in a large occupation area of the devices.
Disclosure of utility model
In view of the above, embodiments of the present utility model provide a low noise amplifier and a portable communication device to at least partially solve the above-mentioned problems.
According to a first aspect of an embodiment of the present utility model, there is provided a low noise amplifier, characterized by comprising: an input pin for receiving a radio frequency signal; an output pin for outputting an amplified radio frequency signal; a control pin receiving a first gain signal; a first grounding pin for receiving a second gain signal, wherein the high and low levels of the first gain signal and the high and low levels of the second gain signal are combined into different gain coefficients; and the low-noise amplifier circuit is electrically connected with the input pin, the output pin, the control pin and the first grounding pin, and the low-noise amplifier amplifies the radio frequency signal by using gain coefficients corresponding to the first gain signal and the second gain signal to obtain the amplified radio frequency signal.
In another implementation, the low noise amplification circuit includes: the common source amplifying circuit and the pre-amplifying branch circuit, wherein the pre-amplifying branch circuit comprises a first gain control end, a second gain control end and a pre-amplifying branch circuit, the first gain control end is connected with the control pin and used for receiving the first gain signal, the second gain control end is connected with the first grounding pin and used for receiving the second gain signal, the high-low level state of the first gain signal and the high-low level state of the second gain signal form various level combinations, the first level combination indicates a first gain coefficient, the second level combination indicates a second gain coefficient, and the first gain coefficient is larger than the second gain coefficient. Wherein the first level combination indicates that the pre-amplification branch enters a first gain mode of the first gain factor and the second level combination indicates that the pre-amplification branch enters a second gain mode of the second gain factor.
In another implementation, the resistances of the plurality of series resistors of the pre-amplification branch in the first gain mode are smaller than the resistances of the plurality of series resistors of the pre-amplification branch in the second gain mode, and the resistances of the plurality of series resistors are used for increasing the source equivalent resistance of the common source amplifying circuit.
In another implementation, the low noise amplification circuit further includes: and the control end of the bypass circuit is connected to the first gain control end and the second gain control end, and a level combination formed by the high-low level state of the first gain signal and the high-low level state of the second gain signal indicates the bypass circuit to enter a bypass state, and the common source amplifying circuit is short-circuited in the bypass state.
In another implementation, the level combination corresponding to the bypass state is different from the level combination corresponding to the first gain factor, and the level combination corresponding to the bypass state is different from the level combination corresponding to the second gain factor.
In another implementation, the low noise amplifier further comprises; and the second grounding pin is connected with the grounding end of the common source amplifying circuit.
In another implementation, a combination of levels where the first gain signal and the second gain signal are both high corresponds to the first gain factor, and a combination of levels where one of the first gain signal and the second gain signal is high and the other is low corresponds to the second gain factor.
In another implementation, a combination of levels where the first gain signal and the second gain signal are both low corresponds to the second gain factor, one of the first gain signal and the second gain signal is high and the other is low corresponds to the first gain factor.
In the embodiment of the utility model, the first grounding pin is directly connected to the low-noise amplifying circuit in the low-noise amplifier, so that the low-noise amplifying circuit can receive the second gain signal, and the second gain signal is multiplexed into one gain control end, so that the combination of the high-low level state formed by the first gain signal received by the other gain control end and the second gain signal realizes multiple control modes, and different gain coefficients are provided in different control modes, therefore, the function of the low-noise amplifier with different gains is realized without excessively increasing the occupied area of a device.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic block diagram of a low noise amplifier according to one embodiment of the present utility model.
Fig. 2 is a schematic block diagram of a low noise amplifier of one example of the embodiment of fig. 1.
Fig. 3 is a schematic block diagram of a portable communication device according to another embodiment of the present utility model.
Detailed Description
In order to better understand the technical solutions in the embodiments of the present utility model, the following description will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the present utility model, shall fall within the scope of protection of the embodiments of the present utility model.
The implementation of the embodiments of the present utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of a low noise amplifier according to one embodiment of the present utility model. The low noise amplifier 100 of fig. 1 includes an input pin 110, an output pin 120, a control pin 130, a first ground pin 140, and a low noise amplifying circuit 150.
Specifically, input pin 110 receives a radio frequency signal. The output pin 120 outputs an amplified radio frequency signal. The control pin 130 receives the first gain signal. The first ground pin 140 receives the second gain signal.
The high and low levels of the first gain signal and the second gain signal are combined into different gain coefficients.
The low noise amplifier circuit 150 is electrically connected to the input pin, the output pin, the control pin and the first ground pin, and the low noise amplifier amplifies the radio frequency signal with gain coefficients corresponding to the first gain signal and the second gain signal to obtain the amplified radio frequency signal.
In the embodiment of the utility model, the first grounding pin is directly connected to the low-noise amplifying circuit in the low-noise amplifier, so that the low-noise amplifying circuit can receive the second gain signal, and the second gain signal is multiplexed into one gain control end, so that the combination of the high-low level state formed by the first gain signal received by the other gain control end and the second gain signal realizes multiple control modes, and different gain coefficients are provided in different control modes, therefore, the function of the low-noise amplifier with different gains is realized without excessively increasing the occupied area of a device.
Fig. 2 is a schematic block diagram of a low noise amplifier of one example of the embodiment of fig. 1. As shown, the low noise amplifier 100 receives a radio frequency signal from an antenna via an input pin 110, and outputs the amplified radio frequency signal after the amplification process via an output pin 120. In addition, the low noise amplifier 100 also performs power supply to the low noise amplifying circuit 150 through the power supply pin 170.
Further, the low noise amplification circuit 150 includes: the common source amplifying circuit and the pre-amplifying branch, the pre-amplifying branch includes a first gain control end, a second gain control end and the pre-amplifying branch, the first gain control end is connected with the control pin 130 for receiving the first gain signal, and the second gain control end is connected with the first grounding pin 140 for receiving the second gain signal.
It will be appreciated that the high and low level states of the first gain signal and the high and low level states of the second gain signal form a plurality of level combinations, the first level combination indicating a first gain factor and the second level combination indicating a second gain factor, the first gain factor being greater than the second gain factor. For example, the following table shows different signal combinations:
| Level combination | Level of the first gain signal | Level of the second gain signal |
| First gain coefficient | High level | High level |
| Second gain coefficient | Low level | Low level |
| Bypass state | High level | Low level |
| Disabled state | Low level | High level |
It should be understood that in the examples shown in the above table, the states corresponding to the respective combinations of levels are exemplary, and in the present embodiment, it is only necessary that different combinations indicate different states. Without loss of generality, the first level combination indicates that the pre-amplification branch enters a first gain mode of a first gain factor, and the second level combination indicates that the pre-amplification branch enters a second gain mode of a second gain factor.
Specifically, the resistances of the plurality of series resistors of the pre-amplification branch in the first gain mode are smaller than the resistances of the plurality of series resistors of the pre-amplification branch in the second gain mode, and the resistances of the plurality of series resistors are used for increasing the source equivalent resistance of the common source amplifying circuit.
As shown in fig. 2, the low noise amplification circuit 150 further includes: and the control end of the bypass circuit is connected to the first gain control end and the second gain control end, and a level combination formed by the high-low level state of the first gain signal and the high-low level state of the second gain signal indicates the bypass circuit to enter a bypass state, and the common source amplifying circuit is short-circuited in the bypass state.
It will be appreciated that the level combination corresponding to the bypass state is different from the level combination corresponding to the first gain factor and the level combination corresponding to the bypass state is different from the level combination corresponding to the second gain factor.
Further, the low noise amplifier 110 further includes a second ground pin 160 connected to the ground of the common source amplifying circuit.
In some examples, a combination of levels where both the first gain signal and the second gain signal are high corresponds to a first gain factor, and a combination of levels where one of the first gain signal and the second gain signal is high and the other is low corresponds to a second gain factor.
Alternatively, a combination of low levels of the first gain signal and the second gain signal corresponds to the second gain factor, and a combination of high levels of one of the first gain signal and the second gain signal corresponds to the first gain factor.
Fig. 3 is a schematic block diagram of a portable communication device according to another embodiment of the present utility model. The portable communication device 400 of fig. 3 includes a low noise amplifier 100.
In the embodiment of the utility model, the first grounding pin can receive the second gain signal and is multiplexed into the gain control end, so that the combination formed by the first gain signal and the second gain signal can provide various gain coefficients, and therefore, the functions of the low-noise amplifier with different gains are realized without excessively increasing the occupied area of the device.
It should be noted that, according to implementation requirements, each component/step described in the embodiments of the present utility model may be split into more components/steps, or two or more components/steps or part of operations of the components/steps may be combined into new components/steps, so as to achieve the objects of the embodiments of the present utility model.
The methods according to embodiments of the present utility model described above may be implemented in hardware, firmware, or as software or computer code storable in a recording medium such as a CD-ROM, RAM, floppy disk, hard disk, or magneto-optical disk, or as computer code originally stored in a remote recording medium or a non-transitory machine-readable medium and to be stored in a local recording medium downloaded through a network, so that the methods described herein may be processed by such software on a recording medium using a general purpose computer, a special purpose processor, or programmable or dedicated hardware such as an Application SPECIFIC INTEGRATED Circuit (ASIC), or field programmable gate array (Field Programmable GATE ARRAY, FPGA). It is understood that a computer, processor, microprocessor controller, or programmable hardware includes a Memory component (e.g., random access Memory (Random Access Memory, RAM), read-Only Memory (ROM), flash Memory, etc.) that can store or receive software or computer code that, when accessed and executed by the computer, processor, or hardware, performs the methods described herein. Furthermore, when a general purpose computer accesses code for implementing the methods illustrated herein, execution of the code converts the general purpose computer into a special purpose computer for performing the methods illustrated herein.
Those of ordinary skill in the art will appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or as a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present utility model.
The above embodiments are only for illustrating the embodiments of the present utility model, but not for limiting the embodiments of the present utility model, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the embodiments of the present utility model, so that all equivalent technical solutions also fall within the scope of the embodiments of the present utility model, and the scope of the embodiments of the present utility model should be defined by the claims.
Claims (10)
1. A low noise amplifier, comprising:
An input pin for receiving a radio frequency signal;
An output pin for outputting an amplified radio frequency signal;
A control pin receiving a first gain signal;
A first grounding pin for receiving a second gain signal, wherein the high and low levels of the first gain signal and the high and low levels of the second gain signal are combined into different gain coefficients;
And the low-noise amplifier circuit is electrically connected with the input pin, the output pin, the control pin and the first grounding pin, and the low-noise amplifier amplifies the radio frequency signal by using gain coefficients corresponding to the first gain signal and the second gain signal to obtain the amplified radio frequency signal.
2. The low noise amplifier of claim 1, wherein the low noise amplification circuit comprises:
The common source amplifying circuit and the pre-amplifying branch circuit comprise a first gain control end, a second gain control end and the pre-amplifying branch circuit, wherein the first gain control end is connected with the control pin and used for receiving the first gain signal, the second gain control end is connected with the first grounding pin and used for receiving the second gain signal, the high-low level state of the first gain signal and the high-low level state of the second gain signal form various level combinations, the first level combination indicates a first gain coefficient, the second level combination indicates a second gain coefficient, and the first gain coefficient is larger than the second gain coefficient;
Wherein the first level combination indicates that the pre-amplification branch enters a first gain mode of the first gain factor and the second level combination indicates that the pre-amplification branch enters a second gain mode of the second gain factor.
3. The low noise amplifier of claim 2, wherein the resistances of the plurality of series resistors of the pre-amplification branch in the first gain mode are less than the resistances of the plurality of series resistors of the pre-amplification branch in the second gain mode, the resistances of the plurality of series resistors being used to increase the source equivalent resistance of the common source amplification circuit.
4. The low noise amplifier of claim 2, wherein the low noise amplification circuit further comprises:
And the control end of the bypass circuit is connected to the first gain control end and the second gain control end, and a level combination formed by the high-low level state of the first gain signal and the high-low level state of the second gain signal indicates the bypass circuit to enter a bypass state, and the common source amplifying circuit is short-circuited in the bypass state.
5. The low noise amplifier of claim 4, wherein the level combination corresponding to the bypass state is different from the level combination corresponding to the first gain factor, and wherein the level combination corresponding to the bypass state is different from the level combination corresponding to the second gain factor.
6. The low noise amplifier of claim 2, wherein the low noise amplifier further comprises; and the second grounding pin is connected with the grounding end of the common source amplifying circuit.
7. The low noise amplifier of claim 2, wherein a combination of levels of the first gain signal and the second gain signal that are both high corresponds to the first gain factor, and a combination of levels of one of the first gain signal and the second gain signal that is high and the other is low corresponds to the second gain factor.
8. The low noise amplifier of claim 7, wherein a combination of levels of the first gain signal and the second gain signal that are both low corresponds to the second gain factor, one of the first gain signal and the second gain signal being high and the other being low corresponds to the first gain factor.
9. The low noise amplifier of claim 8, wherein the low noise amplifier further comprises:
and a bypass circuit that performs bypass of the radio frequency signal when both the first gain signal and the second gain signal are low level.
10. A portable communication device, comprising:
The low noise amplifier of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323031460.4U CN220985630U (en) | 2023-11-09 | 2023-11-09 | Low noise amplifier and portable communication device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202323031460.4U CN220985630U (en) | 2023-11-09 | 2023-11-09 | Low noise amplifier and portable communication device |
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| CN220985630U true CN220985630U (en) | 2024-05-17 |
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| CN202323031460.4U Active CN220985630U (en) | 2023-11-09 | 2023-11-09 | Low noise amplifier and portable communication device |
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| CN (1) | CN220985630U (en) |
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