CN219643882U - High-linearity amplifier circuit and signal receiving system - Google Patents
High-linearity amplifier circuit and signal receiving system Download PDFInfo
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- CN219643882U CN219643882U CN202320795012.2U CN202320795012U CN219643882U CN 219643882 U CN219643882 U CN 219643882U CN 202320795012 U CN202320795012 U CN 202320795012U CN 219643882 U CN219643882 U CN 219643882U
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- 239000003990 capacitor Substances 0.000 claims abstract description 94
- 230000003321 amplification Effects 0.000 abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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- 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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Abstract
The utility model relates to the technical field of communication, in particular to a high-linearity amplifier circuit and a signal receiving system, wherein the high-linearity amplifier circuit comprises: a first input; a first linear amplifier comprising: a forward input, a reverse input, and a first output; a frequency selective capacitor bank comprising: the first capacitor, the second capacitor and the third capacitor are connected in parallel, and the first capacitor is directly connected in series with the second capacitor and the third capacitor in parallel through a first connecting point; the first input end is connected with the forward input end through the frequency-selecting capacitor group, and a second connection point between the frequency-selecting capacitor group and the forward input end is connected with one end of the first resistor; the first output end is connected with the reverse input end, the reverse input end is connected with the first connection point through the second resistor, the suppressed frequency electricity can be selected by adjusting the parameter values of the second resistor and the first capacitor, the rectangular coefficient of the low-frequency noise filter can be adjusted by adjusting the resistance value of the first resistor, the slope control is realized, and then the adjustable filtering amplification is realized.
Description
Technical Field
The present utility model relates to the field of communications technologies, and in particular, to a high linearity amplifier circuit and a signal receiving system.
Background
In a receiving system, due to the limitation of a sampling rate, an intermediate frequency sampling frequency is generally lower, and how to suppress useless low-frequency noise without affecting the receiving sensitivity and without affecting a received useful signal is a technical problem to be solved at present.
In the prior art, low-frequency noise suppression is usually realized in the form of a filter and an amplifier, and the low-frequency filter has a large overall size due to wavelength, so that the low-frequency filter is not beneficial to miniaturized packaging.
Disclosure of Invention
In view of the above, the present utility model provides a high linearity amplifier circuit and a signal receiving system that overcome or at least partially solve the above problems.
The present utility model provides a high linearity amplifier circuit, comprising:
a first input;
a first linear amplifier, the first linear amplifier comprising: a forward input, a reverse input, and a first output;
the frequency-selecting capacitor group comprises: the first capacitor is connected in series with the second capacitor and the third capacitor which are connected in parallel through a first connecting point;
the first input end is connected with the forward input end through the frequency-selecting capacitor group, a second connection point between the frequency-selecting capacitor group and the forward input end is connected with one end of a first resistor, and the other end of the first resistor is grounded;
the first output end is connected with the reverse input end, and the reverse input end is connected with the first connection point through a second resistor.
Further, the first input end is connected with the frequency-selecting capacitor group through a third connection point, the third connection point is connected with one end of a third resistor, and the other end of the third resistor is grounded.
Further, the first linear amplifier further includes: the first positive-pressure power supply end and the first negative-pressure power supply end;
the first positive voltage power supply end is connected with a first power supply filter capacitor;
the first negative voltage power supply end is connected with a second power supply filter capacitor.
Further, the method further comprises the following steps:
a second linear amplifier comprising a second input and a second output;
the second input end is connected with the first output end.
Further, a fourth connection point between the second input end and the first output end is connected with one end of a fourth resistor, the other end of the fourth resistor is grounded, and a fourth capacitor is further connected between the fourth connection point and the second input end.
Further, a fifth capacitor is connected to the second output terminal.
Further, the second linear amplifier further includes: the second positive pressure power supply end inputs a positive pressure power supply, and the second negative pressure power supply end is grounded.
In a second aspect, the present utility model also provides a signal receiving system, including:
a high linearity amplifier circuit as claimed in any of the first aspects.
One or more technical solutions in the embodiments of the present utility model at least have the following technical effects or advantages:
the present utility model provides a high linearity amplifier circuit, comprising: a first input; a first linear amplifier, the first linear amplifier comprising: a forward input, a reverse input, and a first output; a frequency selective capacitor bank, the frequency selective capacitor bank comprising: the first capacitor, the second capacitor and the third capacitor are connected in parallel, and the first capacitor is directly connected in series with the second capacitor and the third capacitor in parallel through a first connecting point; the first input end is connected with the forward input end through the frequency-selecting capacitor group, a second connection point between the frequency-selecting capacitor group and the forward input end is connected with one end of the first resistor, and the other end of the first resistor is grounded; the first output end is connected with the reverse input end, the reverse input end is connected with the first connection point through the second resistor, so that a frequency-selecting capacitor group consisting of the first capacitor, the second capacitor and the third capacitor can select proper frequency signals, the parameter values of the second resistor and the first capacitor can select suppressed frequency electricity, the rectangular coefficient of the low-frequency noise filter can be adjusted through adjusting the resistance value of the first resistor, slope control of the low-frequency noise filter is achieved, adjustable filtering amplification is achieved, and high-linearity signal amplification is achieved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also throughout the drawings, like reference numerals are used to designate like parts. In the drawings:
fig. 1 shows a schematic diagram of a high linearity amplifier circuit in an embodiment of the present utility model.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
An embodiment of the present utility model provides a high linearity amplifier circuit, as shown in fig. 1, including:
a first input 101;
a first linear amplifier U2, the first linear amplifier U2 comprising: a forward input 1021, a reverse input 1022, and a first output 1023;
the frequency-selecting capacitor group 103, wherein the frequency-selecting capacitor group 103 comprises a first capacitor C3, a second capacitor C2 and a third capacitor C5 which are connected in parallel, and the first capacitor C3 is connected in series with the second capacitor C2 and the third capacitor C5 which are connected in parallel through a first connecting point P1;
the first input end 101 is connected with the forward input end 1021 through the frequency-selecting capacitor group 103, a second connection point P2 between the frequency-selecting capacitor group 103 and the forward input end 1021 is connected with one end of a first resistor R1, and the other end of the first resistor R1 is grounded GND;
the first output 1023 is connected to the inverting input 1022, and the inverting input 1022 is connected to the first connection point P1 through the second resistor R4.
Next, in an alternative embodiment, the first input terminal 101 is connected to the frequency-selective capacitor group 103 through a third connection point P3, and one end of a third resistor R2 is connected to the third connection point P3, and the other end of the third resistor R2 is grounded GND.
Wherein, the third resistor R2 is a load resistor. The third resistor R2 serves to reduce the input impedance to achieve impedance matching between the input signal and the first linear amplifier U2.
The first input terminal 101 is configured to receive an input signal, and then the input signal is input to the frequency-selective capacitor set 103, where the frequency-selective capacitor set 103 includes a first capacitor C3, and a second capacitor C2 and a third capacitor C5 connected in parallel. The first capacitor C3, the second capacitor C2 and the third capacitor C5 are all coupling blocking capacitors, and the input signal passes through the frequency-selecting capacitor set 103, so as to achieve the function of frequency selection by adjusting the sizes of the capacitors.
Next, the frequency-selected signal is input to the first linear amplifier U2, specifically, the frequency-selected signal is input to the positive input 1021 of the first linear amplifier U2 via the first inputThe output terminal 1023 outputs. Since the first output terminal 1023 is connected to the inverting input terminal 1022, the amplification gain of the first linear amplifier U2 is 1, i.e. U o ＝U i 。
The first linear amplifier U2 further comprises: the first positive-pressure power supply end and the first negative-pressure power supply end; the first positive voltage power supply end is connected with a first power supply filter capacitor C1, and the first negative voltage power supply end is connected with a second power supply filter capacitor C6. Wherein, carry out malleation power supply Vcc through first malleation power supply end, carry out negative pressure power supply Vss through first negative pressure power supply end.
The first connection point P1 is connected to the inverting input 1022 of the first linear amplifier U2 through the second resistor R4. So that the second resistor R4 and the first capacitor C3 form a frequency-selecting network, i.eAnd the parameters of the second capacitor R4 and the first capacitor C3 are adjusted, so that the frequency electricity to be suppressed is selected, and the suppression of low-frequency noise is realized.
The second connection point P2 between the frequency-selective capacitor group 103 and the positive input terminal 1021 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded GND. And the slope control is realized by adjusting the first resistor R1 and adjusting the rectangular coefficient of the low-frequency noise filtering.
In an alternative embodiment, the high linearity amplifier circuit further comprises: the second linear amplifier U1 functions to increase the gain of the output.
The second linear amplifier U1 includes: a second input 1041 and a second output 1042; wherein the second input terminal 1041 is connected to the first output terminal 1023.
In a specific embodiment, a fourth connection point P4 between the second input terminal 1041 and the first output terminal 1023 is connected to one end of the fourth resistor R3, the other end of the fourth resistor R3 is grounded GND, and a fourth capacitor C4 is further connected between the fourth connection point P4 and the second input terminal 1041.
Impedance matching between the first linear amplifier U2 and the second linear amplifier U1 is achieved by the fourth resistor R3 and the fourth capacitor C4. Thereby realizing high-linearity signal output.
A fifth capacitor C7 is also connected to the second output 1042. The fifth capacitor C7 adopts a coupling blocking capacitor to realize high-linearity signal output.
The second linear amplifier U1 further includes a second positive voltage power supply terminal and a second negative voltage power supply terminal, where the second positive voltage power supply terminal inputs a positive voltage power supply Vcc, and the second negative voltage power supply terminal is grounded GND.
One or more technical solutions in the embodiments of the present utility model at least have the following technical effects or advantages:
the present utility model provides a high linearity amplifier circuit, comprising: a first input; a first linear amplifier, the first linear amplifier comprising: a forward input, a reverse input, and a first output; a frequency selective capacitor bank, the frequency selective capacitor bank comprising: the first capacitor, the second capacitor and the third capacitor are connected in parallel, and the first capacitor is directly connected in series with the second capacitor and the third capacitor in parallel through a first connecting point; the first input end is connected with the forward input end through the frequency-selecting capacitor group, a second connection point between the frequency-selecting capacitor group and the forward input end is connected with one end of the first resistor, and the other end of the first resistor is grounded; the first output end is connected with the reverse input end, the reverse input end is connected with the first connection point through the second resistor, so that a frequency-selecting capacitor group consisting of the first capacitor, the second capacitor and the third capacitor can select proper frequency signals, the parameter values of the second resistor and the first capacitor can select suppressed frequency electricity, the rectangular coefficient of the low-frequency noise filter can be adjusted through adjusting the resistance value of the first resistor, slope control of the low-frequency noise filter is achieved, adjustable filtering amplification is achieved, and high-linearity signal amplification is achieved.
Example two
Based on the same inventive concept, the embodiment of the present utility model further provides a signal receiving system, including:
the high linearity amplifier circuit of any of embodiment one.
By adopting the signal receiving system and utilizing the design mode of the slope-controllable high-speed operational amplifier, the low-frequency signal interference caused by low-frequency gain and power supply noise can be effectively inhibited, and the sensitivity of the receiver in the whole system can be optimized.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A high linearity amplifier circuit, comprising:
a first input;
a first linear amplifier, the first linear amplifier comprising: a forward input, a reverse input, and a first output;
the frequency-selecting capacitor group comprises: the first capacitor is connected in series with the second capacitor and the third capacitor which are connected in parallel through a first connecting point;
the first input end is connected with the forward input end through the frequency-selecting capacitor group, a second connection point between the frequency-selecting capacitor group and the forward input end is connected with one end of a first resistor, and the other end of the first resistor is grounded;
the first output end is connected with the reverse input end, and the reverse input end is connected with the first connection point through a second resistor.
2. The high linearity amplifier circuit of claim 1, wherein a third connection point is connected between the first input terminal and the frequency selective capacitor bank, and wherein said third connection point is connected to one end of a third resistor, and the other end of the third resistor is grounded.
3. The high linearity amplifier circuit of claim 1, wherein said first linear amplifier further comprises: the first positive-pressure power supply end and the first negative-pressure power supply end;
the first positive voltage power supply end is connected with a first power supply filter capacitor;
the first negative voltage power supply end is connected with a second power supply filter capacitor.
4. The high linearity amplifier circuit of claim 1, further comprising:
a second linear amplifier comprising a second input and a second output;
the second input end is connected with the first output end.
5. The high linearity amplifier circuit of claim 4, wherein a fourth connection point between the second input terminal and the first output terminal is connected to one end of a fourth resistor, the other end of the fourth resistor is grounded, and a fourth capacitance is further connected between the fourth connection point and the second input terminal.
6. The high linearity amplifier circuit of claim 4, wherein a fifth capacitor is connected at the second output terminal.
7. The high linearity amplifier circuit of claim 4, wherein said second linear amplifier further comprises: the second positive pressure power supply end inputs a positive pressure power supply, and the second negative pressure power supply end is grounded.
8. A signal receiving system, comprising:
a highly linear amplifier circuit as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320795012.2U CN219643882U (en) | 2023-04-12 | 2023-04-12 | High-linearity amplifier circuit and signal receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320795012.2U CN219643882U (en) | 2023-04-12 | 2023-04-12 | High-linearity amplifier circuit and signal receiving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219643882U true CN219643882U (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320795012.2U Active CN219643882U (en) | 2023-04-12 | 2023-04-12 | High-linearity amplifier circuit and signal receiving system |
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| Country | Link |
|---|---|
| CN (1) | CN219643882U (en) |
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2023
- 2023-04-12 CN CN202320795012.2U patent/CN219643882U/en active Active
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