CN108449059A - A kind of signal scaling circuit based on power function - Google Patents
A kind of signal scaling circuit based on power function Download PDFInfo
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- CN108449059A CN108449059A CN201810560502.8A CN201810560502A CN108449059A CN 108449059 A CN108449059 A CN 108449059A CN 201810560502 A CN201810560502 A CN 201810560502A CN 108449059 A CN108449059 A CN 108449059A
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
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- 230000005611 electricity Effects 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 description 9
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- 238000012886 linear function Methods 0.000 description 1
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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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Abstract
The invention discloses a kind of, and the signal based on power function scales circuit, including cascade first order logarithmic operational circuit, second level linear inverse operational amplifier circuit, third level exponent arithmetic circuit and fourth stage linear inverse operational amplifier circuit successively.The power-function arithmetic of input signal is realized by the circuit, it can fast and effeciently realize and the input signal of smaller voltage range is amplified to wide range voltage or the input signal of larger voltage range is compressed to smaller voltage range, subsequent analog-to-digital conversion is carried out to facilitate, and improves the accuracy of analog-to-digital conversion.
Description
Technical field
The invention belongs to technical field of signal sampling, more particularly to a kind of signal based on power function scales circuit.
Background technology
With the continuous development of Digital Electronic Technique, the analog signal in circuit is increasingly required collected be converted into
Digital signal is normally set up the corresponding GND level of Digital Logic " 0 " or so a certain range, the corresponding a certain high voltage of Digital Logic " 1 "
Left and right a certain range, however usually continuous instantaneous changes analog signal in a certain range.Mould is carried out in some system testings
When quasi- signal sampling, sampling is caused to be lost if analog voltage variation range will be more than this analog-to-digital conversion measurement range when larger
It loses, if smaller may result in of analog voltage signal variation range cannot correctly be sampled.Therefore, it is necessary to a kind of improved technology elder generations
It converts the larger analog signal compression of variation range to the measurable range of analog-to-digital conversion, or small range analog signal is amplified
It for a wide range of signal, is then sampled again, to improve the accuracy of analog-to-digital conversion.
Invention content
In order to solve the technical issues of above-mentioned background technology proposes, the present invention is intended to provide a kind of signal based on power function
Circuit is scaled, by carrying out power-function arithmetic to input analog signal, realizes the nonlinear amplification to analog signal or compression.
In order to achieve the above technical purposes, the technical scheme is that：
A kind of signal scaling circuit based on power function, including cascade first order logarithmic operational circuit, the second level successively
Linear inverse operational amplifier circuit, third level exponent arithmetic circuit and fourth stage linear inverse operational amplifier circuit；The first order logarithm fortune
It includes the first amplifier, the first diode and first resistor to calculate circuit, and one end of first resistor receives input signal, first resistor
The other end connect the negative input end of the first amplifier, the positive input terminal ground connection of the first amplifier, the anode of the first diode connects
The negative input end of the first amplifier is connect, the cathode of the first diode connects the output end of the first amplifier；The second level is linear
Reversed operational amplifier circuit includes third amplifier, 3rd resistor and the 4th resistance, and the both ends of the 4th resistance are separately connected the first amplification
The negative input end of the output end and third amplifier of device, the positive input terminal ground connection of third amplifier, the both ends difference of 3rd resistor
Connect the negative input end and output end of third amplifier；The third level exponent arithmetic circuit includes the second amplifier, the two or two
Pole pipe and second resistance, the output end of the anode connection third amplifier of the second diode, the cathode connection the of the second diode
The negative input end of two amplifiers, the positive input terminal ground connection of the second amplifier, the both ends of second resistance are separately connected the second amplifier
Negative input end and output end；The fourth stage linear inverse operational amplifier circuit includes the 4th amplifier, the 5th resistance and the 6th electricity
Resistance, the both ends of the 6th resistance are separately connected the negative input end of the output end and the 4th amplifier of the second amplifier, the 4th amplifier
Positive input terminal ground connection, the both ends of the 5th resistance are separately connected the output of the negative input end and the 4th amplifier of the 4th amplifier
End；The power-function arithmetic of input signal is realized by foregoing circuit：Y=bxa, y is output signal, and x is input signal, and b is to be
Number, a is power exponent, and wherein the value of power exponent a is the ratio of 3rd resistor and the 4th resistance in first order operational amplifier circuit, when
a>When 1, realizes the amplification of signal, work as a<When 1, the compression of signal is realized.
Preferred embodiment based on the above-mentioned technical proposal increases resistor network in the input terminal of first order logarithmic operational circuit,
To adjust the dynamic range of input signal.
Preferred embodiment based on the above-mentioned technical proposal, the resistor network include the 7th resistance and the 8th resistance, the 7th electricity
Resistance is connected between input signal and first resistor, the 8th resistance eutral grounding of common end of the 7th resistance and first resistor.
Preferred embodiment based on the above-mentioned technical proposal, value and the first diode and the two or two pole of the coefficient b of power function
The parameter and first resistor of pipe are related to the resistance value of second resistance.
Preferred embodiment based on the above-mentioned technical proposal, the value of the coefficient b of power function and the 5th resistance and the 6th resistance
Resistance value is related.
The advantageous effect brought using above-mentioned technical proposal：
The present invention, which need to only adjust the resistance in circuit, can realize arbitrary power side's circuit, can also adjust power letter
Coefficient before number can be realized fast and effeciently and the input signal of smaller voltage range is amplified to wide range voltage or is incited somebody to action
The input signal of larger voltage range is compressed to smaller voltage range, carries out subsequent analog-to-digital conversion to facilitate, and improve
The accuracy of analog-to-digital conversion.
Description of the drawings
Fig. 1 is first order logarithmic operational circuit figure in the present invention；
Fig. 2 is third level exponent arithmetic circuit diagram in the present invention；
Fig. 3 is power function schematic block circuit diagram of the present invention；
Fig. 4 is square operation circuit figure in embodiment；
Fig. 5 is square root calculation circuit diagram in embodiment；
Fig. 6 is that square operation circuit input and output voltage relationship emulates schematic diagram；
Fig. 7 is that square root calculation circuit input and output voltage relationship emulates schematic diagram；
Fig. 8 is that square operation circuit input and output time-domain signal emulates schematic diagram；
Fig. 9 is that square root calculation circuit input and output time-domain signal emulates schematic diagram.
Specific implementation mode
Below with reference to attached drawing, technical scheme of the present invention is described in detail.
Fig. 1 and Fig. 2 is basic component units --- the first order logarithm operation in the signal scaling circuit that the present invention designs
Circuit and third level exponent arithmetic circuit.Fig. 3 is that the functional block diagram of composition power function is taken according to its structure in the present embodiment
The square operation circuit (signal amplification circuit) and square root calculation circuit (Signal Compression circuit) built as shown in Figure 4 and Figure 5, it
By first order logarithmic operational circuit, second level linear inverse operational amplifier circuit, third level exponent arithmetic circuit and fourth stage line
The reversed operational amplifier circuit of property cascades.Wherein amplifier U1-U4 selects suitable operation to put according to operated range of signal size
Big device U1~U4 (OPAMP), VCC and VDD are the power supplies of amplifier, generally use negative and positive dual power, diode D1 and D2
It is general-purpose diode, resistance selects general resistance.The resistance value of different diodes and R1, R2 influences the coefficient before power function,
By adjusting the operation ratio of second level linear inverse operational amplifier circuit, i.e. the ratio of R3 and R4 changes function values of powers, for example,
In the square operation circuit of Fig. 4, R3/R4=2 is set, in the square root calculation circuit of Fig. 5, sets R3/R4=1/2.Change
The ratio of fourth stage linear inverse amplifier ratio, i.e. R5 and R6 adjusts the coefficient of power function.For signal amplification circuit, defeated
Enter end and increases the dynamic range that resistor network R7 and R8 are used for adjusting operable input signal.In the present embodiment, Fig. 4 is corresponded to
Input/output relation be y=x2, emulate as shown in fig. 6, the corresponding input/output relations of Fig. 5 areIt is emulated as schemed
Shown in 7.
Fig. 8 and Fig. 9 is the time-domain simulation results schematic diagram of square operation circuit and square root calculation circuit, can from figure
Will become apparent from power function circuit to the zoom capabilities with DC offset voltage signal, square operation circuit is onesize defeated
Enter under signal, magnification level is bigger than linear function, and square root calculation circuit compression degree is also bigger than linear circuit, improves
Transformation efficiency.
Embodiment is merely illustrative of the invention's technical idea, and cannot limit protection scope of the present invention with this, it is every according to
Technological thought proposed by the present invention, any change done on the basis of technical solution, each falls within the scope of the present invention.
Claims (5)
1. a kind of signal based on power function scales circuit, it is characterised in that：Including cascade first order logarithm operation electricity successively
Road, second level linear inverse operational amplifier circuit, third level exponent arithmetic circuit and fourth stage linear inverse operational amplifier circuit；Described first
Grade logarithmic operational circuit includes the first amplifier, the first diode and first resistor, and one end of first resistor receives input signal,
The other end of first resistor connects the negative input end of the first amplifier, the positive input terminal ground connection of the first amplifier, the first diode
Anode connect the negative input end of the first amplifier, the cathode of the first diode connects the output end of the first amplifier；Described
Two level linear inverse operational amplifier circuit includes third amplifier, 3rd resistor and the 4th resistance, and the both ends of the 4th resistance are separately connected
The negative input end of the output end and third amplifier of first amplifier, the positive input terminal ground connection of third amplifier, 3rd resistor
Both ends are separately connected the negative input end and output end of third amplifier；The third level exponent arithmetic circuit includes the second amplification
Device, the second diode and second resistance, the output end of the anode connection third amplifier of the second diode, the moon of the second diode
Pole connects the negative input end of the second amplifier, the positive input terminal ground connection of the second amplifier, and the both ends of second resistance are separately connected the
The negative input end and output end of two amplifiers；The fourth stage linear inverse operational amplifier circuit includes the 4th amplifier, the 5th resistance
With the 6th resistance, the both ends of the 6th resistance are separately connected the negative input end of the output end and the 4th amplifier of the second amplifier, the
The positive input terminal of four amplifiers is grounded, and the both ends of the 5th resistance are separately connected the negative input end and the 4th amplifier of the 4th amplifier
Output end；The power-function arithmetic of input signal is realized by foregoing circuit：Y=bxa, y is output signal, and x is input signal,
B is coefficient, and a is power exponent, and wherein the value of power exponent a is the ratio of 3rd resistor and the 4th resistance in first order operational amplifier circuit
Value, works as a>When 1, realizes the amplification of signal, work as a<When 1, the compression of signal is realized.
2. the signal based on power function scales circuit according to claim 1, it is characterised in that：In first order logarithm operation electricity
Resistor network, the dynamic range for adjusting input signal is arranged in the input terminal on road.
3. the signal based on power function scales circuit according to claim 2, it is characterised in that：The resistor network includes the
Seven resistance and the 8th resistance, the 7th resistance are connected between input signal and first resistor, the public affairs of the 7th resistance and first resistor
End is through the 8th resistance eutral grounding altogether.
4. the signal based on power function scales circuit according to claim 1, it is characterised in that：The coefficient b's of power function takes
Value is related to the parameter and first resistor of the first diode and the second diode and the resistance value of second resistance.
5. the signal based on power function scales circuit according to claim 1, it is characterised in that：The coefficient b's of power function takes
Value is related to the 5th resistance and the resistance value of the 6th resistance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810560502.8A CN108449059A (en) | 2018-05-25 | 2018-05-25 | A kind of signal scaling circuit based on power function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810560502.8A CN108449059A (en) | 2018-05-25 | 2018-05-25 | A kind of signal scaling circuit based on power function |
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| CN108449059A true CN108449059A (en) | 2018-08-24 |
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| CN201810560502.8A Pending CN108449059A (en) | 2018-05-25 | 2018-05-25 | A kind of signal scaling circuit based on power function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5578958A (en) * | 1994-09-12 | 1996-11-26 | Fuji Photo Film Co., Ltd. | Logarithmic amplifier |
| US8521802B1 (en) * | 2013-02-19 | 2013-08-27 | King Fahd University Of Petroleum And Minerals | Arbitrary power law function generator |
| CN103873066A (en) * | 2014-03-17 | 2014-06-18 | 上海华虹宏力半导体制造有限公司 | Square root compressor circuit |
| CN103970359A (en) * | 2013-01-29 | 2014-08-06 | 北京博汇信通科技有限公司 | Photoelectric signal processing circuit used for infrared touch screen |
| CN107145661A (en) * | 2017-05-03 | 2017-09-08 | 江西理工大学 | A kind of circuit design method of real number index power memristor model |
| CN208174645U (en) * | 2018-05-25 | 2018-11-30 | 南京信息工程大学 | A kind of signal scaling circuit based on power function |
-
2018
- 2018-05-25 CN CN201810560502.8A patent/CN108449059A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5578958A (en) * | 1994-09-12 | 1996-11-26 | Fuji Photo Film Co., Ltd. | Logarithmic amplifier |
| CN103970359A (en) * | 2013-01-29 | 2014-08-06 | 北京博汇信通科技有限公司 | Photoelectric signal processing circuit used for infrared touch screen |
| US8521802B1 (en) * | 2013-02-19 | 2013-08-27 | King Fahd University Of Petroleum And Minerals | Arbitrary power law function generator |
| CN103873066A (en) * | 2014-03-17 | 2014-06-18 | 上海华虹宏力半导体制造有限公司 | Square root compressor circuit |
| CN107145661A (en) * | 2017-05-03 | 2017-09-08 | 江西理工大学 | A kind of circuit design method of real number index power memristor model |
| CN208174645U (en) * | 2018-05-25 | 2018-11-30 | 南京信息工程大学 | A kind of signal scaling circuit based on power function |
Non-Patent Citations (1)
| Title |
|---|
| 梁廷贵;周浩淼;: "集成运放线性应用电路分析方法的研究", 唐山学院学报, vol. 2, no. 06, pages 209 - 210 * |
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Address after: No.219, ningliu Road, Jiangbei new district, Nanjing, Jiangsu Province, 210032 Applicant after: Nanjing University of Information Science and Technology Address before: 211500 Yuting square, 59 Wangqiao Road, Liuhe District, Nanjing City, Jiangsu Province Applicant before: Nanjing University of Information Science and Technology |
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Application publication date: 20180824 |