CN102624351A - Multi-frequency resonance circuit - Google Patents
Multi-frequency resonance circuit Download PDFInfo
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- CN102624351A CN102624351A CN2012100989202A CN201210098920A CN102624351A CN 102624351 A CN102624351 A CN 102624351A CN 2012100989202 A CN2012100989202 A CN 2012100989202A CN 201210098920 A CN201210098920 A CN 201210098920A CN 102624351 A CN102624351 A CN 102624351A
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- resonance unit
- parallel resonance
- inductance
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- resonance
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Abstract
The invention relates to a resonance circuit comprising at least two resonance frequency components. The (n-1)th parallel resonance unit is connected in series with an nth resistor Rn and an nth inductor Ln to form an nth-layer series branch. An nth capacitor Cn is connected in parallel with the nth-layer series branch to form an nth parallel resonance unit. N parallel resonance units are sequentially nested, wherein n is any positive integer. The nth parallel resonance unit is connected in series with a series resonance unit consisting of a resistor Rs, an inductor Ls and a capacitor Cs. The resonance circuit has the advantages that: multiple resonances are generated at the same time, and the synthetic emission of sinusoidal current of a plurality of resonance frequencies also can be realized.
Description
Technical field
The present invention relates to a kind of resonant circuit, be specifically related to a kind of circuit that comprises the sinusoidal current composite wave of at least two resonance frequency compositions.
Background technology
Existing resonant circuit structure mainly contains series resonance, parallel resonance and connection in series-parallel hybrid resonant; Be characterized in; When the frequency of excitation equates with the natural frequency of circuit; Can strengthen the signal of this frequency better and suppress the signal of other frequency, the natural frequency of this circuit is called the resonance frequency of circuit.Circuit with single resonance frequency is very common; But in practical application; The signal of a plurality of resonance frequencys need be provided; Launch the signal of multiple frequency like radio communication for improving frequency bandwidth, geology detecting is to raise the efficiency and obtain the electric current of the ground electrical information of different depth to underground transmission different frequency, and then the circuit of single resonance frequency can not satisfy instructions for use.
" mix field source electromagnetic method instrument, development progress ", Cheng Defu, Wang Jun; Li Xiu equality, Advances in Geophysics, the 19th the 4th phase of volume; The 778th ~ 781 page, in December, 2004, put down in writing a kind of mixed field source electromagnetics transmitter; Adopt same set of transmitting antenna to cooperate different resonant capacitance timesharing to send the humorous time-dependent current of different frequency,, still belong to the single-frequency emission in essence because the same time of radiating circuit has only a resonant tank.
" multiple spot is the analysis and the emulation of resonant circuit simultaneously ", Li Shiqiong, electric and electronic teaching journal; The 30th the 2nd phase of volume, the 33rd ~ 35 page, in April, 2008; Put down in writing a kind of multiple spot resonant circuit simultaneously, multiple spot while resonant circuit is in series by two or more parallel resonances unit and constitutes, and each parallel resonance unit comprises inductance, electric capacity and resistance; Parallel resonance can take place in parallel resonance unit simultaneously everywhere; Multiple spot while resonant circuit also can be in parallel by two or more series resonances unit and constitute, and each series resonance unit comprises inductance, electric capacity and resistance, and series resonance can take place simultaneously in the series resonance unit everywhere; The multiple spot while resonant circuit that writes down in the literary composition resonance effect of resonance everywhere is independently, can not realize synthesizing of resonance current everywhere.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of multifrequency resonant circuit, and it can realize that at least two resonance take place simultaneously, and can the resonance current of at least two frequencies be synthesized.
Technical problem to be solved by this invention is to realize that through such technical scheme it comprises that being connected with first inductance L 1 by first resistance R 1 is the ground floor series arm, with the parallelly connected formation with the ground floor series arm of the first capacitor C 1 first parallel resonance unit; It is characterized in that:
By the first parallel resonance unit and second resistance R 2, second inductance L 2 is connected is second layer series arm, with the parallelly connected formation with second layer series arm of the second capacitor C 2 second parallel resonance unit;
By the second parallel resonance unit and the 3rd resistance R 3, the 3rd inductance L 3 is connected is the 3rd layer of series arm, with the 3rd capacitor C 3 and the 3rd layer of parallelly connected formation of series arm the 3rd parallel resonance unit;
Order connects like this, and the parallel resonance unit is nested successively,
Being connected with n resistance R n, n inductance L n by n-1 parallel resonance unit is n layer series arm, and with n capacitor C n and the parallelly connected formation of n layer series arm n parallel resonance unit, wherein n gets any in the positive integer;
A series resonance unit that is made up of n parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.
The present invention is made up of n nested parallel resonance unit and 1 series resonance unit, can produce n+1 resonance point, can realize that n+1 resonance takes place simultaneously, because n gets 1 at least, then the present invention has at least two resonance to take place simultaneously; The resonance current of each resonant element can be concentrated and come together in the ground floor series arm, can realize that the sinusoidal current of a plurality of frequencies is synthetic.If first resistance R 1 of ground floor series arm and first inductance L 1 constitute resistance sense property transmitting antenna, then can realize the synthetic emission of sinusoidal current of a plurality of resonance frequencys.The advantage that the present invention has is: can realize that a plurality of resonance take place simultaneously, and can realize the synthetic emission of sinusoidal current of a plurality of resonance frequencys.
Description of drawings
Description of drawings of the present invention is following:
Fig. 1 is a circuit diagram of the present invention;
Fig. 2 is the circuit diagram of first embodiment of the invention;
Fig. 3 is for applying the oscillogram of transmitting antenna electric current behind the square wave excitation in the circuit shown in Figure 2;
Fig. 4 applies the transmitting antenna current spectrum figure that obtains behind the square wave excitation in the circuit shown in Figure 2;
Fig. 5 is the circuit diagram of second embodiment of the invention;
Fig. 6 is for applying the oscillogram of transmitting antenna electric current behind the square wave excitation in the circuit shown in Figure 5;
Fig. 7 applies the transmitting antenna current spectrum figure that obtains behind the square wave excitation in the circuit shown in Figure 5.
Fig. 8 is the circuit diagram of third embodiment of the invention;
Fig. 9 is for applying the oscillogram of transmitting antenna electric current behind the square wave excitation in the circuit shown in Figure 8;
Figure 10 applies the transmitting antenna current spectrum figure that obtains behind the square wave excitation in the circuit shown in Figure 8.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
As shown in Figure 1, the present invention includes that to be connected with first inductance L 1 by first resistance R 1 be the ground floor series arm, with the parallelly connected formation of the first capacitor C 1 first parallel resonance unit with the ground floor series arm;
By the first parallel resonance unit and second resistance R 2, second inductance L 2 is connected is second layer series arm, with the parallelly connected formation with second layer series arm of the second capacitor C 2 second parallel resonance unit;
Order connects like this, and the parallel resonance unit is nested successively,
Being connected with n resistance R n, n inductance L n by n-1 parallel resonance unit is n layer series arm, and with n capacitor C n and the parallelly connected formation of n layer series arm n parallel resonance unit, wherein n gets any in the positive integer;
A series resonance unit that is made up of n parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.
Be connected to a square wave excitation power supply in the circuit shown in Figure 1.
When n=1, the parallel resonance unit only has that to be connected with first inductance L 1 by first resistance R 1 be the ground floor series arm, with the first parallel resonance unit of the parallelly connected formation with the ground floor series arm of first capacitor C 1; A series resonance unit that is made up of the first parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.The present invention is the resonant circuit with two resonance points like this, and is as shown in Figure 2.
Foregoing circuit is made up of n nested parallel resonance unit and series resonance unit, can produce n+1 resonance point, can realize that n+1 resonance takes place simultaneously; The resonance current of each resonant element can be concentrated and come together in the ground floor series arm, can realize that the sinusoidal current of a plurality of frequencies is synthetic.If first resistance R 1 of ground floor series arm and first inductance L 1 constitute resistance sense property transmitting antenna, then can realize the synthetic emission of sinusoidal current of a plurality of resonance frequencys.
Implement 1
As shown in Figure 2, it is the resonant circuit of two resonance points, and being connected with first inductance L 1 by first resistance R 1 is the ground floor series arm, with the parallelly connected formation with the ground floor series arm of the first capacitor C 1 first parallel resonance unit;
A series resonance unit that is made up of the first parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.
Be connected to a square wave excitation power supply in the circuit shown in Figure 2.
First resistance R 1 of this circuit and first inductance L 1 are respectively the transmitting antenna resistance and the inductance of (perhaps claiming transmitting coil).According to kirchhoff current law (KCL), flow through the current i of transmitting antenna L1
1=i
01+ i
s, i wherein
1Be the electric current of ground floor series arm, i
01Be the electric current of the first parallel resonance unit, i
sResonance current for series resonant circuit.
Fig. 3 is for applying the oscillogram of transmitting antenna electric current behind the square wave excitation in the circuit shown in Figure 2, and this waveform is to be superimposed with a high_frequency sine wave on the low-frequency sine, and the amplitude of low-frequency sine is greater than high_frequency sine wave.
Fig. 4 applies the transmitting antenna current spectrum figure that obtains behind the square wave excitation in the circuit shown in Figure 2, comprises two kinds of dominant frequency compositions of resonance frequency 711Hz resonant frequency 28kHz in the waveform of Fig. 3, and this circuit has good selecting frequency characteristic.
As shown in Figure 5, it is the resonant circuit of three resonance points, and being connected with first inductance L 1 by first resistance R 1 is the ground floor series arm, with the parallelly connected formation with the ground floor series arm of the first capacitor C 1 first parallel resonance unit;
By the first parallel resonance unit and second resistance R 2, second inductance L 2 is connected is second layer series arm, with the parallelly connected formation with second layer series arm of the second capacitor C 2 second parallel resonance unit;
A series resonance unit that is made up of the second parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.
Be connected to a square wave excitation power supply in the circuit shown in Figure 5.
First resistance R 1 of this circuit and first inductance L 1 are respectively the transmitting antenna resistance and the inductance of (perhaps claiming transmitting coil).According to kirchhoff current law (KCL), flow through the current i of transmitting antenna L1
1=i
01+ i
2, i
2=i
02+ i
sSo, i
1=i
01+ i
02+ i
s, i wherein
1Be the electric current of ground floor series arm, i
01Be the electric current of the first parallel resonance unit, i
02Be the electric current of the second parallel resonance unit, i
sResonance current for series resonant circuit.
Fig. 6 is for applying the oscillogram of transmitting antenna electric current behind the square wave excitation in the circuit shown in Figure 5, and this waveform is complicated.
Fig. 7 applies the transmitting antenna current spectrum figure that obtains behind the square wave excitation in the circuit shown in Figure 5, comprises resonance frequency 660Hz, three kinds of dominant frequency compositions of resonance frequency 30kHz resonant frequency 59kHz in the waveform of Fig. 6, and this circuit has good selecting frequency characteristic.
As shown in Figure 8, it is the resonant circuit of four resonance points, and being connected with first inductance L 1 by first resistance R 1 is the ground floor series arm, with the parallelly connected formation with the ground floor series arm of the first capacitor C 1 first parallel resonance unit;
By the first parallel resonance unit and second resistance R 2, second inductance L 2 is connected is second layer series arm, with the parallelly connected formation with second layer series arm of the second capacitor C 2 second parallel resonance unit;
By the second parallel resonance unit and the 3rd resistance R 3, the 3rd inductance L 3 is connected is the 3rd layer of series arm, with the 3rd capacitor C 3 and the 3rd layer of parallelly connected formation of series arm the 3rd parallel resonance unit;
A series resonance unit that is made up of the 3rd parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.
Be connected to a square wave excitation power supply in the circuit shown in Figure 8.
First resistance R 1 of this circuit and first inductance L 1 are respectively the transmitting antenna resistance and the inductance of (perhaps claiming transmitting coil).According to kirchhoff current law (KCL), flow through the current i of transmitting antenna L1
1=i
01+ i
2, i wherein
2=i
02+ i
3, i
3=i
03+ i
sSo, i
1=i
01+ i
02+ i
03+ i
s, i wherein
1Be the electric current of ground floor series arm, i
01Be the electric current of the first parallel resonance unit, i
02Be the electric current of the second parallel resonance unit, i
03Be the electric current of the 3rd parallel resonance unit, i
sResonance current for series resonant circuit.
Fig. 9 is for applying the oscillogram of transmitting antenna electric current behind the square wave excitation in the circuit shown in Figure 8, and this waveform is complicated.
Figure 10 applies the transmitting antenna current spectrum figure that obtains behind the square wave excitation in the circuit shown in Figure 8; Comprise resonance frequency 11kHz, resonance frequency 56kHz, resonance frequency 101kHz and four kinds of dominant frequency compositions of 132kHz in the waveform of Fig. 9, this circuit has good selecting frequency characteristic.
For fear of influencing each other of each resonant element resonant inductance, the present invention's each resonant inductance except that transmitting antenna shields or coiling magnetic screen inductance.
Claims (2)
1. a multifrequency resonant circuit comprises that being connected with first inductance L 1 by first resistance R 1 is the ground floor series arm, with the parallelly connected formation with the ground floor series arm of the first capacitor C 1 first parallel resonance unit; It is characterized in that:
By the first parallel resonance unit and second resistance R 2, second inductance L 2 is connected is second layer series arm, with the parallelly connected formation with second layer series arm of the second capacitor C 2 second parallel resonance unit;
By the second parallel resonance unit and the 3rd resistance R 3, the 3rd inductance L 3 is connected is the 3rd layer of series arm, with the 3rd capacitor C 3 and the 3rd layer of parallelly connected formation of series arm the 3rd parallel resonance unit;
Order connects like this, and the parallel resonance unit is nested successively,
Being connected with n resistance R n, n inductance L n by n-1 parallel resonance unit is n layer series arm, and with n capacitor C n and the parallelly connected formation of n layer series arm n parallel resonance unit, wherein n gets any in the positive integer;
A series resonance unit that is made up of n parallel resonance unit and resistance R s, inductance L s, capacitor C s again is in series.
2. multifrequency resonant circuit according to claim 1 is characterized in that: each inductance except that first inductance L 1 is provided with electromagnetic screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100989202A CN102624351A (en) | 2012-04-06 | 2012-04-06 | Multi-frequency resonance circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100989202A CN102624351A (en) | 2012-04-06 | 2012-04-06 | Multi-frequency resonance circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102624351A true CN102624351A (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100989202A Pending CN102624351A (en) | 2012-04-06 | 2012-04-06 | Multi-frequency resonance circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346404A (en) * | 2013-06-28 | 2013-10-09 | 无锡创元电子科技有限公司 | Resonant type broadband short-wave antenna |
| CN107582059A (en) * | 2016-07-06 | 2018-01-16 | 韦伯斯特生物官能(以色列)有限公司 | Magnetic generation circuit for tracking system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4425565A (en) * | 1981-12-04 | 1984-01-10 | Johns Robert H | Multiple resonant coil using distributed capacity between turns |
| US5166621A (en) * | 1990-10-26 | 1992-11-24 | Spectroscopy Imaging Systems Corporation | Multi-resonant nmr coils |
| CN201403077Y (en) * | 2009-02-17 | 2010-02-10 | 何连成 | Lumped parameter band-pass filter |
| CN202168043U (en) * | 2011-06-07 | 2012-03-14 | 常州市同惠电子有限公司 | Passive circuit correcting amplitude-frequency characteristic of signal source |
-
2012
- 2012-04-06 CN CN2012100989202A patent/CN102624351A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4425565A (en) * | 1981-12-04 | 1984-01-10 | Johns Robert H | Multiple resonant coil using distributed capacity between turns |
| US5166621A (en) * | 1990-10-26 | 1992-11-24 | Spectroscopy Imaging Systems Corporation | Multi-resonant nmr coils |
| CN201403077Y (en) * | 2009-02-17 | 2010-02-10 | 何连成 | Lumped parameter band-pass filter |
| CN202168043U (en) * | 2011-06-07 | 2012-03-14 | 常州市同惠电子有限公司 | Passive circuit correcting amplitude-frequency characteristic of signal source |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346404A (en) * | 2013-06-28 | 2013-10-09 | 无锡创元电子科技有限公司 | Resonant type broadband short-wave antenna |
| CN107582059A (en) * | 2016-07-06 | 2018-01-16 | 韦伯斯特生物官能(以色列)有限公司 | Magnetic generation circuit for tracking system |
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Application publication date: 20120801 |