CN117713705B - Low noise amplifier - Google Patents

Low noise amplifier Download PDF

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Publication number
CN117713705B
CN117713705B CN202410164107.3A CN202410164107A CN117713705B CN 117713705 B CN117713705 B CN 117713705B CN 202410164107 A CN202410164107 A CN 202410164107A CN 117713705 B CN117713705 B CN 117713705B
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transistor
circuit
input
capacitor
output
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CN117713705A (en
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尚鹏飞
周永峰
郭嘉帅
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Shenzhen Volans Technology Co Ltd
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Shenzhen Volans Technology Co Ltd
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/523—Circuit arrangements for protecting such amplifiers for amplifiers using field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

The invention provides a low noise amplifier, which comprises a signal input end, an input protection circuit, an input matching circuit, an active circuit, an output matching circuit and a signal output end; the input protection circuit comprises a power detection circuit and a bleeder circuit; the power detection circuit includes a voltage division capacitance circuit, a power supply, a first transistor, a first resistor, a first capacitor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, and a comparator circuit. The low-noise amplifier can quickly start the bleeder circuit when a larger radio frequency power signal is input so as to drain the radio frequency input power to the ground, thereby avoiding the damage of devices caused by overlarge voltage difference at the signal input end of the low-noise amplifier and better protecting the devices of the low-noise amplifier.

Description

Low noise amplifier
Technical Field
The invention relates to the technical field of wireless communication, in particular to a low-noise amplifier.
Background
With the rapid development of wireless communication technology, small-sized electronic devices such as mobile phones and tablet computers with wireless communication function have become necessities in life of people, and the performance of the radio frequency receiver serving as a key ring in the electronic devices directly influences the experience of the small-sized electronic devices.
In a related art wireless communication system, an antenna input end of a radio frequency receiver often faces a relatively complex space environment, meanwhile, due to the increase of communication frequency bands, the communication coexistence of multiple modes and multiple frequency bands, the number of radio frequency devices and antennas of a small electronic device correspondingly increases, the space isolation is deteriorated, a signal input end of a low noise amplifier needs to bear the input of radio frequency signals with higher power, and the devices of the low noise amplifier cannot be damaged.
Therefore, there is an urgent need for a new low noise amplifier that can quickly bleed the rf input power to ground when a larger rf power signal is input, so as to avoid the damage of devices caused by the excessive voltage difference at the signal input end of the low noise amplifier in the related art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel low-noise amplifier to solve the problem that the signal input end of the low-noise amplifier in the related art is damaged by overlarge voltage difference.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention provides a low noise amplifier, which comprises a signal input end, an input protection circuit, an input matching circuit, an active circuit, an output matching circuit and a signal output end;
A first input end of the input protection circuit is connected to the signal input end;
the input end of the input matching circuit is respectively connected to the signal input end and the second output end of the input protection circuit;
the input end of the active circuit is connected to the output end of the input matching circuit;
the input end of the output matching circuit is connected to the output end of the active circuit;
the signal output end is connected to the output end of the output matching circuit;
the input protection circuit comprises a power detection circuit and a bleeder circuit;
The power detection circuit comprises a voltage division capacitance circuit, a power supply, a first transistor, a first resistor, a first capacitor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor and a comparator circuit;
the input end of the voltage division capacitor circuit is used as a first input end of the input protection circuit, and the voltage division capacitor circuit is used for dividing the radio frequency power signal accessed by the signal input end;
The input end of the power supply current is connected to the working voltage, and the power supply current is used for generating bias voltages for the second transistor, the fifth transistor and the sixth transistor through the first transistor;
the drain electrode of the first transistor and the grid electrode of the first transistor are respectively connected to the output end of the power supply, and the source electrode of the first transistor is grounded;
a first end of the first resistor is connected to the output end of the voltage division capacitance circuit, and a second end of the first resistor is connected to the grid electrode of the first transistor;
A first end of the first capacitor is connected to a second end of the first resistor, and a second end of the first capacitor is grounded;
the grid electrode of the second transistor is connected to the output end of the voltage division capacitance circuit;
The drain electrode of the third transistor and the grid electrode of the third transistor are respectively connected to the drain electrode of the second transistor, and the source electrode of the third transistor is connected to the working voltage;
A gate of the fourth transistor is connected to the gate of the third transistor, and a source of the fourth transistor is connected to the operating voltage;
the drain of the fifth transistor is connected to the drain of the fourth transistor;
The grid electrode of the sixth transistor is respectively connected to the first end of the first capacitor and the grid electrode of the fifth transistor, the drain electrode of the sixth transistor is respectively connected to the source electrode of the second transistor and the source electrode of the fifth transistor, and the source electrode of the sixth transistor is grounded;
an input end of the comparator circuit is connected to a drain electrode of the fourth transistor, an output end of the comparator circuit is connected to a first input end of the bleeder circuit, and the comparator circuit is used for controlling the conduction of the bleeder circuit;
the second input end of the bleeder circuit is used as the second input end of the input protection circuit, the output end of the bleeder circuit is grounded, and the bleeder circuit is used for bleeding the radio frequency power signal accessed by the signal input end to the ground.
Preferably, the voltage division capacitance circuit includes a second capacitance and a third capacitance;
The first end of the second capacitor is used as the input end of the voltage division capacitor circuit, and the second end of the second capacitor is used as the output end of the voltage division capacitor circuit;
The first end of the third capacitor is connected to the second end of the second capacitor, and the second end of the third capacitor is grounded.
Preferably, the comparator circuit includes a first comparator and a second comparator;
The input end of the first comparator is used as the input end of the comparator circuit;
The input end of the second comparator is connected to the output end of the first comparator, and the output end of the second comparator is used as the output end of the comparator circuit.
Preferably, the bleeder circuit comprises a seventh transistor and an eighth transistor;
The drain of the seventh transistor serves as a second input terminal of the bleeder circuit;
The gate of the eighth transistor and the gate of the seventh transistor together serve as the first input terminal of the bleeder circuit, the drain of the eighth transistor is connected to the source of the seventh transistor, and the source of the eighth transistor serves as the output terminal of the bleeder circuit.
Preferably, the input matching circuit comprises a fourth capacitor, a fifth capacitor and a first inductor;
The first end of the fourth capacitor is used as an input end of the input matching circuit, and the second end of the fourth capacitor is used as an output end of the input matching circuit;
the first end of the fifth capacitor is connected to the second end of the fourth capacitor;
the first end of the first inductor is connected to the second end of the fifth capacitor, and the second end of the first inductor is grounded.
Preferably, the active circuit includes a ninth transistor and a tenth transistor;
a grid electrode of the ninth transistor is used as an input end of the active circuit, and a source electrode of the ninth transistor is connected to a first end of the first inductor;
the source of the tenth transistor is connected to the drain of the ninth transistor, the gate of the tenth transistor is connected to an external bias voltage, and the drain of the tenth transistor serves as the output terminal of the active circuit.
Preferably, the output matching circuit comprises a second inductor and a sixth capacitor;
the first end of the second inductor is connected to the working voltage;
The first end of the sixth capacitor and the second end of the second inductor are used as the input end of the output matching circuit together, and the second end of the sixth capacitor is used as the output end of the output matching circuit.
Compared with the related art, the low noise amplifier in the invention has the advantages that the input protection circuit is designed at the signal input end, the input protection circuit is defined to comprise the power detection circuit and the bleeder circuit, the power detection circuit is also defined to comprise the voltage division capacitance circuit, the power supply, the first transistor, the first resistor, the first capacitor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, the sixth transistor and the comparator circuit, and the bleeder circuit is used for bleeding the radio frequency power signal connected to the signal input end to the ground, so that the bleeder circuit can be quickly started when a larger radio frequency power signal is input, the radio frequency input power is released to the ground, and further, the damage of devices caused by overlarge voltage difference at the signal input end of the low noise amplifier is avoided, and the devices of the low noise amplifier are better protected.
Drawings
The present invention will be described in detail with reference to the accompanying drawings. The foregoing and other aspects of the invention will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings. In the accompanying drawings:
fig. 1 is a circuit configuration diagram of a low noise amplifier according to an embodiment of the present invention.
Wherein, 100, the low noise amplifier; 1. an input protection circuit; 11. a power detection circuit; 111. a voltage dividing capacitor circuit; 112. a comparator circuit; 12. a bleeder circuit; 2. an input matching circuit; 3. an active circuit; 4. and outputting a matching circuit.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a low noise amplifier 100, which is shown in fig. 1, and includes a signal input terminal RFIN, an input protection circuit 1, an input matching circuit 2, an active circuit 3, an output matching circuit 4, and a signal output terminal RFOUT.
Wherein a first input of the input protection circuit 1 is connected to the signal input RFIN.
The input of the input matching circuit 2 is connected to the signal input RFIN and to the second output of the input protection circuit 1, respectively.
An input of the active circuit 3 is connected to an output of the input matching circuit 2.
The input of the output matching circuit 4 is connected to the output of the active circuit 3.
The signal output terminal RFOUT is connected to the output terminal of the output matching circuit 4.
Specifically, the input protection circuit 1 includes a power detection circuit 11 and a bleeder circuit 12.
In the present embodiment, the power detection circuit 11 includes a voltage division capacitor circuit 111, a power supply current Iref, a first transistor MN1, a first resistor R1, a first capacitor C1, a second transistor MN2, a third transistor MP3, a fourth transistor MP4, a fifth transistor MN5, a sixth transistor MN6, and a comparator circuit 112.
The input end of the voltage division capacitor circuit 111 is used as a first input end of the input protection circuit 1, and the voltage division capacitor circuit 111 is used for dividing the radio frequency power signal accessed by the signal input end RFIN.
The voltage dividing capacitance circuit 111 includes a second capacitance C2 and a third capacitance C3.
The first end of the second capacitor C2 is used as the input end of the voltage division capacitor circuit 111, and the second end of the second capacitor C2 is used as the output end of the voltage division capacitor circuit 111.
The first end of the third capacitor C3 is connected to the second end of the second capacitor C2, and the second end of the third capacitor C3 is grounded.
The input terminal of the power supply Iref is connected to the operating voltage VDD, and the power supply Iref is used for generating bias voltages for the second transistor MN2, the fifth transistor MN5 and the sixth transistor MN6 respectively through the first transistor MN 1.
The drain of the first transistor MN1 and the gate of the first transistor MN1 are respectively connected to the output terminal of the power supply current Iref, and the source of the first transistor MN1 is Grounded (GND).
A first end of the first resistor R1 is connected to the output end of the voltage dividing capacitor circuit 111, and a second end of the first resistor R1 is connected to the gate of the first transistor MN 1.
The first end of the first capacitor C1 is connected to the second end of the first resistor R1, and the second end of the first capacitor C1 is Grounded (GND).
The gate of the second transistor MN2 is connected to the output terminal of the voltage dividing capacitance circuit 111.
The drain of the third transistor MP3 and the gate of the third transistor MP3 are respectively connected to the drain of the second transistor MN2, and the source of the third transistor MP3 is connected to the operating voltage VDD.
The gate of the fourth transistor MP4 is connected to the gate of the third transistor MP3, and the source of the fourth transistor MP4 is connected to the operating voltage VDD.
The drain of the fifth transistor MN5 is connected to the drain of the fourth transistor MP 4.
The gate of the sixth transistor MN6 is connected to the first end of the first capacitor C1 and the gate of the fifth transistor MN5, respectively, the drain of the sixth transistor MN6 is connected to the source of the second transistor MN2 and the source of the fifth transistor MN5, respectively, and the source of the sixth transistor MN6 is Grounded (GND).
An input terminal of the comparator circuit 112 is connected to the drain of the fourth transistor MP4, an output terminal of the comparator circuit 112 is connected to the first input terminal of the bleeder circuit 12, and the comparator circuit 112 is configured to control the conduction of the bleeder circuit 12.
The comparator circuit 112 includes a first comparator INV1 and a second comparator INV2.
An input terminal of the first comparator INV1 serves as an input terminal of the comparator circuit 112.
An input end of the second comparator INV2 is connected to an output end of the first comparator INV1, and an output end of the second comparator INV2 serves as an output end of the comparator circuit 112.
The second input end of the bleeder circuit 12 is used as the second input end of the input protection circuit 1, the output end of the bleeder circuit 12 is grounded, and the bleeder circuit 12 is used for bleeding the radio frequency power signal accessed by the signal input end RFIN to the ground so as to realize input protection.
The bleeder circuit 12 includes a seventh transistor MN7 and an eighth transistor MN8.
The drain of the seventh transistor MN7 serves as a second input of the bleeder circuit 12.
The gate of the eighth transistor MN8 and the gate of the seventh transistor MN7 together serve as the first input terminal of the bleeder circuit 12, the drain of the eighth transistor MN8 is connected to the source of the seventh transistor MN7, and the source of the eighth transistor MN8 serves as the output terminal of the bleeder circuit 12.
Specifically, the input matching circuit 2 includes a fourth capacitor C4, a fifth capacitor C5, and a first inductor Ls.
The first end of the fourth capacitor C4 is used as the input end of the input matching circuit 2, and the second end of the fourth capacitor C4 is used as the output end of the input matching circuit 2.
The first end of the fifth capacitor C5 is connected to the second end of the fourth capacitor C4.
The first end of the first inductor Ls is connected to the second end of the fifth capacitor C5, and the second end of the first inductor Ls is grounded.
Specifically, the active circuit 3 includes a ninth transistor MN9 and a tenth transistor MN10.
The gate of the ninth transistor MN9 is used as the input terminal of the active circuit 3, and the source of the ninth transistor MN9 is connected to the first terminal of the first inductor Ls.
The source of the tenth transistor MN10 is connected to the drain of the ninth transistor MN9, the gate of the tenth transistor MN10 is connected to the external bias voltage, and the drain of the tenth transistor MN10 serves as the output terminal of the active circuit 3.
Specifically, the output matching circuit 4 includes a second inductance Ld and a sixth capacitance C6.
The first end of the second inductor Ld is connected to the operating voltage VDD.
The first end of the sixth capacitor C6 and the second end of the second inductor Ld are commonly used as the input end of the output matching circuit 4, and the second end of the sixth capacitor C6 is used as the output end of the output matching circuit 4.
The voltage-dividing capacitor circuit 111 in this embodiment is to reduce the signal influence of the signal input terminal RFIN as much as possible, and the capacitance values of the second capacitor C2 and the third capacitor C3 are smaller; the first resistor R1 and the first capacitor C1 form a low-pass filter to avoid the influence of the input of the rf power signal on the bias point of the sixth transistor MN 6.
When the input of the radio frequency power signal is smaller, the sizes of the second transistor MN2, the third transistor MP3, the fourth transistor MP4, the fifth transistor MN5 and the sixth transistor MN6 are reasonably designed, so that the driving capability of the fifth transistor MN5 and the sixth transistor MN6 can be improved, when the voltage is at the DOTU node, the voltage is lower, the voltage is still low level after passing through the third transistor MP3 and the fourth transistor MP4, the pressure release circuit is cut off (not conducted), and the low noise amplifier 100 is in a normal working state; when the input amplitude of the radio frequency power signal increases, the quiescent current component of the second transistor MN2 increases, after passing through the mirror image of the third transistor MP3, the quiescent current driving capability of the fourth transistor MP4 increases, after reaching a certain degree, the voltage of the DOUT node turns to a high level, the pressure release circuit is turned on, the input protection circuit 1 works accordingly, the function of releasing the high radio frequency power signal is realized, and the release of the radio frequency power signal to the ground is realized.
The magnitude of the on power point of the input protection circuit 1 can be adjusted by adjusting the ratio of the capacitance values of the second capacitor C2 and the third capacitor C3 and the dimensions of the second transistor MN2, the fifth transistor MN5, and the sixth transistor MN 6.
The low noise amplifier 100 of the present embodiment is configured to design the input protection circuit 1 at the signal input terminal RFIN, and define that the input protection circuit 1 includes the power detection circuit 11 and the bleeder circuit 12, and further define that the power detection circuit 11 includes the voltage division capacitor circuit 111, the power supply current Iref, the first transistor MN1, the first resistor R1, the first capacitor C1, the second transistor MN2, the third transistor MP3, the fourth transistor MP4, the fifth transistor MN5, the sixth transistor MN6, and the comparator circuit 112, and the bleeder circuit 12 is configured to bleeder the radio frequency power signal accessed by the signal input terminal RFIN to the ground, so that the bleeder circuit 12 can be turned on rapidly when a larger radio frequency power signal is input, so as to bleeder the radio frequency input power to the ground, thereby avoiding the device damage caused by the excessive voltage difference at the signal input terminal RFIN of the low noise amplifier 100, and further protecting the device of the low noise amplifier 100. Specifically, by detecting the input rf power signal, when the power of the rf power signal reaches a certain value, the bleeder circuit 12 is turned on, so as to realize the pull-down protection of the signal input terminal RFIN of the low noise amplifier 100.
It should be noted that the above embodiments described above with reference to the drawings are only for illustrating the present invention and not for limiting the scope of the present invention, and it should be understood by those skilled in the art that modifications or equivalent substitutions to the present invention are intended to be included in the scope of the present invention without departing from the spirit and scope of the present invention. Furthermore, unless the context indicates otherwise, words occurring in the singular form include the plural form and vice versa. In addition, unless specifically stated, all or a portion of any embodiment may be used in combination with all or a portion of any other embodiment.

Claims (7)

1. The low noise amplifier comprises a signal input end, an input protection circuit, an input matching circuit, an active circuit, an output matching circuit and a signal output end;
A first input end of the input protection circuit is connected to the signal input end;
the input end of the input matching circuit is respectively connected to the signal input end and the second output end of the input protection circuit;
the input end of the active circuit is connected to the output end of the input matching circuit;
the input end of the output matching circuit is connected to the output end of the active circuit;
the signal output end is connected to the output end of the output matching circuit; it is characterized in that the method comprises the steps of,
The input protection circuit comprises a power detection circuit and a bleeder circuit;
The power detection circuit comprises a voltage division capacitance circuit, a power supply, a first transistor, a first resistor, a first capacitor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor and a comparator circuit;
the input end of the voltage division capacitor circuit is used as a first input end of the input protection circuit, and the voltage division capacitor circuit is used for dividing the radio frequency power signal accessed by the signal input end;
The input end of the power supply current is connected to the working voltage, and the power supply current is used for generating bias voltages for the second transistor, the fifth transistor and the sixth transistor through the first transistor;
the drain electrode of the first transistor and the grid electrode of the first transistor are respectively connected to the output end of the power supply, and the source electrode of the first transistor is grounded;
a first end of the first resistor is connected to the output end of the voltage division capacitance circuit, and a second end of the first resistor is connected to the grid electrode of the first transistor;
A first end of the first capacitor is connected to a second end of the first resistor, and a second end of the first capacitor is grounded;
the grid electrode of the second transistor is connected to the output end of the voltage division capacitance circuit;
The drain electrode of the third transistor and the grid electrode of the third transistor are respectively connected to the drain electrode of the second transistor, and the source electrode of the third transistor is connected to the working voltage;
A gate of the fourth transistor is connected to the gate of the third transistor, and a source of the fourth transistor is connected to the operating voltage;
the drain of the fifth transistor is connected to the drain of the fourth transistor;
The grid electrode of the sixth transistor is respectively connected to the first end of the first capacitor and the grid electrode of the fifth transistor, the drain electrode of the sixth transistor is respectively connected to the source electrode of the second transistor and the source electrode of the fifth transistor, and the source electrode of the sixth transistor is grounded;
an input end of the comparator circuit is connected to a drain electrode of the fourth transistor, an output end of the comparator circuit is connected to a first input end of the bleeder circuit, and the comparator circuit is used for controlling the conduction of the bleeder circuit;
the second input end of the bleeder circuit is used as the second input end of the input protection circuit, the output end of the bleeder circuit is grounded, and the bleeder circuit is used for bleeding the radio frequency power signal accessed by the signal input end to the ground.
2. The low noise amplifier of claim 1, wherein the voltage division capacitance circuit comprises a second capacitance and a third capacitance;
The first end of the second capacitor is used as the input end of the voltage division capacitor circuit, and the second end of the second capacitor is used as the output end of the voltage division capacitor circuit;
The first end of the third capacitor is connected to the second end of the second capacitor, and the second end of the third capacitor is grounded.
3. The low noise amplifier of claim 1, wherein the comparator circuit comprises a first comparator and a second comparator;
The input end of the first comparator is used as the input end of the comparator circuit;
The input end of the second comparator is connected to the output end of the first comparator, and the output end of the second comparator is used as the output end of the comparator circuit.
4. The low noise amplifier of claim 1, wherein the bleeder circuit comprises a seventh transistor and an eighth transistor;
The drain of the seventh transistor serves as a second input terminal of the bleeder circuit;
The gate of the eighth transistor and the gate of the seventh transistor together serve as the first input terminal of the bleeder circuit, the drain of the eighth transistor is connected to the source of the seventh transistor, and the source of the eighth transistor serves as the output terminal of the bleeder circuit.
5. The low noise amplifier of claim 1, wherein the input matching circuit comprises a fourth capacitance, a fifth capacitance, and a first inductance;
The first end of the fourth capacitor is used as an input end of the input matching circuit, and the second end of the fourth capacitor is used as an output end of the input matching circuit;
the first end of the fifth capacitor is connected to the second end of the fourth capacitor;
the first end of the first inductor is connected to the second end of the fifth capacitor, and the second end of the first inductor is grounded.
6. The low noise amplifier of claim 5, wherein the active circuit comprises a ninth transistor and a tenth transistor;
a grid electrode of the ninth transistor is used as an input end of the active circuit, and a source electrode of the ninth transistor is connected to a first end of the first inductor;
the source of the tenth transistor is connected to the drain of the ninth transistor, the gate of the tenth transistor is connected to an external bias voltage, and the drain of the tenth transistor serves as the output terminal of the active circuit.
7. The low noise amplifier of claim 6, wherein the output matching circuit comprises a second inductor and a sixth capacitor;
the first end of the second inductor is connected to the working voltage;
The first end of the sixth capacitor and the second end of the second inductor are used as the input end of the output matching circuit together, and the second end of the sixth capacitor is used as the output end of the output matching circuit.
CN202410164107.3A 2024-02-05 2024-02-05 Low noise amplifier Active CN117713705B (en)

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WO2023082939A1 (en) * 2021-11-01 2023-05-19 深圳飞骧科技股份有限公司 Low-noise amplifier of ultra-wideband communication standard, and radio frequency chip
CN117318640A (en) * 2023-10-20 2023-12-29 唯捷创芯(天津)电子技术股份有限公司 Power amplifier module, electronic equipment and method for realizing average power protection

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023082939A1 (en) * 2021-11-01 2023-05-19 深圳飞骧科技股份有限公司 Low-noise amplifier of ultra-wideband communication standard, and radio frequency chip
CN115333493A (en) * 2022-10-09 2022-11-11 深圳飞骧科技股份有限公司 Radio frequency low noise amplifier circuit and radio frequency chip
CN117318640A (en) * 2023-10-20 2023-12-29 唯捷创芯(天津)电子技术股份有限公司 Power amplifier module, electronic equipment and method for realizing average power protection

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