CN111262530A - Signal amplification circuit - Google Patents
Signal amplification circuit Download PDFInfo
- Publication number
- CN111262530A CN111262530A CN201811465915.4A CN201811465915A CN111262530A CN 111262530 A CN111262530 A CN 111262530A CN 201811465915 A CN201811465915 A CN 201811465915A CN 111262530 A CN111262530 A CN 111262530A
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- China
- Prior art keywords
- resistor
- capacitor
- amplifier
- signal
- circuit
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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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/234—Indexing scheme relating to amplifiers the input amplifying stage being one or more operational amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/372—Noise reduction and elimination in amplifier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to a signal amplification circuit, comprising: the non-inverting input end of an amplifier A1 is connected with one end of a capacitor C3, the inverting input end of an amplifier A1 is connected with one end of a resistor R1, the non-inverting output end of an amplifier A1 is connected with one end of a resistor R2 and the negative electrode of a diode D1, the other end of R2 is connected with the inverting input end of an amplifier A2 and one end of a capacitor C1, the non-inverting input end of an amplifier A2 is connected with one end of a capacitor C2 and the positive electrode of a diode D2, the non-inverting output end of an amplifier A2 is connected with the other end of a capacitor C2, one end of a resistor R3 and the signal output end, the other end of a resistor R3 is connected with the negative electrode of a diode D2, one end of a resistor R4 is connected. The amplifying circuit provided by the invention amplifies the input signals in phase, so that the intensity of the signals in the circuit is improved, and the linearity and continuity of the signals in the circuit are improved.
Description
Technical Field
The invention belongs to the field of electronic circuits, and particularly relates to a signal amplification circuit.
Background
Along with the rapid development of scientific technology, the types of electronic products are more and more abundant, and various electronic products enter families of ordinary people, so that the daily life of people at present can not be separated from the electronic products.
Because the performances of various electronic products are different, the input signal strength of some electronic products is not large enough, or the attenuation of the electronic products is serious in the signal transmission process, so that the signal is unstable, and the linearity and the continuity of the signal are influenced.
Disclosure of Invention
In order to solve the deficiencies in the prior art, the invention provides a signal amplifying circuit, which specifically comprises:
the signal amplification circuit comprises an amplifier A1, an amplifier A2, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1 and a diode D2, wherein the non-inverting input end of the amplifier A1 is connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with the signal input end, the inverting input end of the amplifier A1 is connected with one end of the resistor R1, the non-inverting output end of the amplifier A1 is connected with one end of the resistor R2 and the cathode of the diode D1, the other end of the R2 is connected with the inverting input end of the amplifier A2 and one end of the capacitor C1, the non-inverting input end of the amplifier A2 is connected with one end of the capacitor C2 and the anode end of the diode D2, the non-inverting output end of the amplifier A2 is connected with the other end of the capacitor C2, One end of the resistor R3 is connected with the input end of the signal filter circuit, one end of the cathode of the diode D2 is connected with the other end of the resistor R3, one end of the resistor R4 is connected with the anode of the diode D1, and the other end of the resistor R1, the other end of the capacitor C1 and the other end of the resistor R4 are all grounded.
In one embodiment of the present invention, the amplifier a1 and the amplifier a2 are both LM 741.
In an embodiment of the present invention, the signal filter circuit includes a resistor R5, a resistor R6, a capacitor C4, and a capacitor C5, one end of the resistor R5 is connected to the output end of the signal amplifier circuit, the other end of the resistor R5 is connected to one end of the capacitor C4 and one end of the capacitor C5, the other end of the capacitor C5 is connected to one end of the resistor R6 and the signal output end, and the other end of the capacitor C4 and the other end of the resistor R6 are both grounded.
Compared with the prior art, the invention has the beneficial effects that:
1. the amplifier A1, the amplifier A2, the resistor R1, the resistor R2, the resistor R3, the capacitor C1 and the capacitor C2 in the signal amplifying circuit amplify signals input by the signal input module in an in-phase proportion, so that the strength of the signals in the circuit is improved, and the linearity and the continuity of the signals in the circuit are improved.
2. According to the invention, through the diode D1 and the diode D2 in the signal amplification circuit, voltage stabilization processing is carried out on the signal in the signal amplification circuit, and the stability of signal transmission is improved.
3. The signal filtering circuit is added between the signal amplifying circuit and the signal output circuit, and the interference of noise signals in the signal amplifying circuit can be reduced and the quality of transmission signals is improved through the filtering processing of the circuit.
Drawings
Fig. 1 is a schematic structural diagram of a signal amplifying circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
The present invention relates to a signal amplification circuit. Referring to fig. 1, fig. 1 is a schematic structural diagram of a signal amplifying circuit according to an embodiment of the present invention, where the structure of the amplifying circuit specifically includes:
the signal input end, signal amplification circuit, signal filter circuit, signal output.
A signal input for providing an input signal to the circuit. The signal input end is connected with one end of the capacitor C3.
A signal amplifying circuit comprises an amplifier A1, an amplifier A2, a capacitor C1, a capacitor C2, a resistor R2, a diode D2 and a diode D2, wherein the non-inverting input end of the amplifier A2 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the signal input end, the inverting input end of the amplifier A2 is connected with one end of the resistor R2, the non-inverting output end of the amplifier A2 is connected with one end of the resistor R2 and the cathode of the diode D2, the other end of the R2 is connected with the inverting input end of the amplifier A2 and one end of the capacitor C2, the anode end of the diode D2 is connected with the non-inverting input end of the amplifier A2, the non-inverting output end of the amplifier A2 is connected with the other end of the capacitor C2, one end of the resistor R2 and the input end of the filter circuit, one end of the diode D2 is, the other end of the resistor R1, the other end of the capacitor C1 and the other end of the resistor R4 are all grounded.
Preferably, amplifier a1 and amplifier a2 are both LM 741.
In the embodiment, the in-phase proportional amplification of the input signal of the amplifying circuit is realized through the amplifier a1, the amplifier a2, the resistor R1, the resistor R2, the resistor R3, the capacitor C1 and the capacitor C2 in the signal amplifying circuit, so that the strength of the signal in the circuit is improved, and the linearity of the signal in the circuit and the continuity of signal transmission are improved.
Further, in order to improve the stability of the signal transmission in the signal amplification circuit, the diode D1 and the diode D2 are added to the signal amplification circuit, and the voltage stabilization processing is performed on the signal in the signal amplification circuit, so that the stability of the signal transmission is improved.
The signal filtering circuit comprises a resistor R5, a resistor R6, a capacitor C4 and a capacitor C5, one end of the resistor R5 is connected with the output end of the signal amplifying circuit, the other end of the resistor R5 is connected with one end of a capacitor C4 and one end of a capacitor C5, the other end of the capacitor C5 is connected with one end of a resistor R6 and the signal output end, and the other end of the capacitor C4 and the other end of the resistor R6 are grounded. One end of the resistor R5 is connected with the output end of the signal amplifying circuit, and one end of the resistor R5 is connected with the non-inverting output end of the amplifier A2, one end of the capacitor C2 and one end of the resistor R3 in the signal amplifying circuit.
Furthermore, a resistor R5 and a capacitor C4 in the signal filter circuit form a low-pass filter, a resistor R6 and a capacitor C5 form a high-pass filter, the low-pass filter and the high-pass filter are connected in series, and the low-pass filter and the high-pass filter which are connected in series can form a band-pass filter by adjusting parameters of the resistor R5, the resistor R6, the capacitor C4 and the capacitor C5.
In the embodiment, the signal filtering circuit is added between the signal amplifying circuit and the signal output circuit, and the interference of noise signals in the signal amplifying circuit can be reduced through the filtering processing of the circuit, so that the quality of transmission signals is improved.
And the signal output end is used for outputting the signals passing through the signal amplifying circuit and the signal filtering circuit. The signal output end is connected with one end of a capacitor C5 in the signal filtering circuit and one end of a resistor R6.
The beneficial effects of this embodiment:
1. in the embodiment, the amplifier a1, the amplifier a2, the resistor R1, the resistor R2, the resistor R3, the capacitor C1 and the capacitor C2 in the signal amplifying circuit amplify the signals input by the signal input module in the same phase ratio, so that the strength of the signals in the circuit is improved, and the linearity and continuity of the signals in the circuit are improved.
2. In the embodiment, the diode D1 and the diode D2 in the signal amplifying circuit are used for performing voltage stabilization processing on the signal in the signal amplifying circuit, so that the stability of signal transmission is improved.
3. In the embodiment, the signal filtering circuit is added between the signal amplifying circuit and the signal output circuit, and the interference of noise signals in the signal amplifying circuit can be reduced through the filtering processing of the circuit, so that the quality of transmission signals is improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (3)
1. A signal amplification circuit, comprising: the signal amplification circuit comprises an amplifier A1, an amplifier A2, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1 and a diode D2, wherein the non-inverting input end of the amplifier A1 is connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with the signal input end, the inverting input end of the amplifier A1 is connected with one end of the resistor R1, the non-inverting output end of the amplifier A1 is connected with one end of the resistor R2 and the cathode of the diode D1, the other end of the R2 is connected with the inverting input end of the amplifier A2 and one end of the capacitor C1, the non-inverting input end of the amplifier A2 is connected with one end of the capacitor C2 and the anode end of the diode D2, the non-inverting output end of the amplifier A2 is connected with the other end of the capacitor C2, One end of the resistor R3 is connected with the input end of the signal filter circuit, one end of the cathode of the diode D2 is connected with the other end of the resistor R3, one end of the resistor R4 is connected with the anode of the diode D1, and the other end of the resistor R1, the other end of the capacitor C1 and the other end of the resistor R4 are all grounded.
2. The circuit of claim 1, wherein the amplifier a1 and the amplifier a2 are both LM 741.
3. The circuit of claim 1, wherein the signal filtering circuit comprises a resistor R5, a resistor R6, a capacitor C4, and a capacitor C5, one end of the resistor R5 is connected to the output end of the signal amplifying circuit, the other end of the resistor R5 is connected to one end of the capacitor C4 and one end of the capacitor C5, the other end of the capacitor C5 is connected to one end of the resistor R6 and the signal output end, and the other end of the capacitor C4 and the other end of the resistor R6 are both grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811465915.4A CN111262530A (en) | 2018-12-03 | 2018-12-03 | Signal amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811465915.4A CN111262530A (en) | 2018-12-03 | 2018-12-03 | Signal amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111262530A true CN111262530A (en) | 2020-06-09 |
Family
ID=70951980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811465915.4A Pending CN111262530A (en) | 2018-12-03 | 2018-12-03 | Signal amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111262530A (en) |
-
2018
- 2018-12-03 CN CN201811465915.4A patent/CN111262530A/en active Pending
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200609 |
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| WD01 | Invention patent application deemed withdrawn after publication |