CN105071781B - A kind of passive frequency selective algorithm receiving circuit - Google Patents
A kind of passive frequency selective algorithm receiving circuit Download PDFInfo
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- CN105071781B CN105071781B CN201510607442.7A CN201510607442A CN105071781B CN 105071781 B CN105071781 B CN 105071781B CN 201510607442 A CN201510607442 A CN 201510607442A CN 105071781 B CN105071781 B CN 105071781B
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Abstract
The present invention is suitable for circuit field, provides a kind of passive frequency selective algorithm receiving circuit, the circuit includes:Capacitance C1, carrier wave coupling coil T1, capacitance C7, inductance L4, capacitance C4, inductance L5, capacitance C5, inductance L6, capacitance C6, resistance R2, field-effect tube Q1, resistance R1, resistance R3, capacitance C9, the inductance L4 is in parallel with the capacitance C4, it connects with C7, for the first LC filters, the first LC filters are serially connected in the circuit, the inductance L5 in parallel with the capacitance C5 is the 2nd LC filters, the 2nd LC filters are serially connected in the circuit, the inductance L6 is in parallel with the capacitance C6, it connects with C8, for the 3rd LC filters, the 3rd LC filters are serially connected in the circuit, the resistance R3, resistance R2 forms attenuator circuit with field-effect tube Q1, the attenuator circuit is serially connected in the circuit.
Description
【Technical field】
The invention belongs to circuit field more particularly to a kind of passive frequency selective algorithm receiving circuits.
【Background technology】
What is used in available circuit is usually active filter, and both filter was necessarily connected on electric power just use,
Which not only adds the costs of circuit, and increase the volume of circuit, are brought to the use of user cumbersome.
【Invention content】
The embodiment of the present invention is designed to provide a kind of passive frequency selective algorithm receiving circuit, to solve the prior art
Active filter uses cumbersome problem.
The embodiment of the present invention is achieved in that a kind of passive frequency selective algorithm receiving circuit, the circuit include:Electricity
Hold C1, carrier wave coupling coil T1, capacitance C7, inductance L4, capacitance C4, inductance L5, capacitance C5, inductance L6, capacitance C6, resistance R2,
Field-effect tube Q1, resistance R1, resistance R3, capacitance C9, the inductance L4 is in parallel with the capacitance C4, connects with C7 and is filtered for the first LC
Wave device, the first LC filters are serially connected in the circuit, and the inductance L5 is in parallel with the capacitance C5 to be filtered for the 2nd LC
Device, the 2nd LC filters are serially connected in the circuit, and the inductance L6 is in parallel with the capacitance C6, and it is third to connect with C8
LC filters, the capacitance C8 are serially connected between the capacitance C6 and the capacitance C4, and the 3rd LC filters are serially connected with institute
It states in circuit, the resistance R3, resistance R2 and field-effect tube Q1 form attenuator circuit, and the attenuator circuit is serially connected with the circuit
In, the attenuator circuit is for dividing filtered high-frequency signal, so that the high-frequency signal reaches decaying, it is described
Resistance R1 is serially connected between the grid and source electrode of the field-effect tube, and the signal of the passive frequency selective algorithm receiving circuit is defeated
Between the resistance R2 and resistance R3, capacitance C1's outlet connects with the coupling coil T1, and is linked into power line
Zero curve and firewire between.
Further, the capacitance C1 connects with the coupling coil T1, and be linked into the zero curve of power line and firewire it
Between.
Further, the first LC filters are 125KHz high-frequency signals below for ending resonant frequency.
Further, the 2nd LC filters are used to end the high-frequency signal that resonant frequency is 140KHz.
Further, the 3rd LC filters are used to end the high-frequency signal that resonant frequency is 125KHz.
Further, the attenuator circuit is for dividing filtered high-frequency signal, so that the high frequency is believed
Number reach decaying.
Further, the circuit further includes：Diode D1, diode D2, the diode D1 and diode D2 combinations
To hinder width resistance.
Further, the resistance width resistance is used to carry out amplitude limit to the high-frequency signal by partial pressure.
Further, the high-frequency signal amplitude limit by partial pressure is 0.7V by the amplitude limit resistance.
The embodiment of the present invention, passive frequency selective algorithm receiving circuit use the design of passive filter, high-frequency signal logical
After overcoupling, completely by third-order filter, the high-frequency signal of specific frequency is extracted, specific high-frequency signal is inputted
Into carrier communication chip, the stability of circuit ensure that.
【Description of the drawings】
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the circuit diagram of passive frequency selective algorithm receiving circuit provided in an embodiment of the present invention.
【Specific implementation mode】
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
It is the circuit diagram of passive frequency selective algorithm receiving circuit provided in an embodiment of the present invention as shown in Figure 1, it is described
Circuit includes：Capacitance C1, carrier wave coupling coil T1, capacitance C7, inductance L4, capacitance C4, inductance L5, capacitance C5, inductance L6, capacitance
C6, resistance R2, field-effect tube Q1, resistance R1, resistance R3, capacitance C9.
Wherein, capacitance C1 and coupling coil T1 is to be connected in series with, and access between the zero curve of power line and firewire, capacitance C1
Effect be in order to be isolated alternating current, coupling coil T1 as being that the high-frequency signal on power line is coupled to coupling coil T1
Output stage, while high-pressure side and low-pressure side being isolated.
As the alternative embodiment of the present invention, the alternating current of 50Hz can be isolated in capacitance C1.
Inductance L4 is in parallel with capacitance C4, and it is the first LC filters to connect with C7, and the first LC filters are serially connected in circuit,
The high-frequency signal of coupling coil T1 outputs carries out the first rank bandpass filtering, the resonance of the first LC filters by the first LC filters
Frequency is：, both set LC parameters to 125KHz, then the first LC filters can by frequency be 125KHz high-frequency signals below into
Row cut-off.
Inductance L5 in parallel with capacitance C5 is the 2nd LC filters, and the 2nd LC filters are serially connected in circuit, the 2nd LC filters
The resonant frequency of wave device is：, the 2nd LC filters can be output to by the high-frequency signal of the first LC filter filterings, then the 2nd LC
Filter can filter out out the high-frequency signal of 140KHz or more.
Inductance L6 is in parallel with capacitance C6, and it is the 3rd LC filters to connect with C8, and the 3rd LC filters are serially connected in circuit,
3rd LC filters are 125KHz high-frequency signals below for cutoff frequency, have both passed through the high frequency letter of the 2nd LC filters extraction
Number can by the 3rd LC filter rejection frequencies be 125KHz near high-frequency signal.
After above-mentioned three ranks bandpass filtering, the high-frequency signal for only having frequency centered on frequency is 132KHz is input to
In circuit.At this point, resistance R3, resistance R2 and field-effect tube Q1 can form attenuator circuit, filtered high-frequency signal is input to
When the attenuator circuit, field-effect tube Q1 conductings, high-frequency signal is divided by resistance R3 and resistance R2 so that and high-frequency signal is attenuated,
It can inhibit the interference signal in high-frequency signal.
The embodiment of the present invention, passive frequency selective algorithm receiving circuit use the design of passive filter, high-frequency signal logical
After overcoupling, is filtered completely by three ranks, the high-frequency signal of specific frequency is extracted, specific high-frequency signal is input to
In carrier communication chip, the stability of circuit ensure that.
As the alternative embodiment of the present invention, the circuit further includes：
Diode D1 and diode D2, the diode D1 and diode D2 are combined into amplitude limit resistance.The amplitude limit resistance is used
In carrying out amplitude limit to the high-frequency signal by partial pressure, optionally：The amplitude limit resistance will pass through the high-frequency signal amplitude limit divided
0.7V。
Those of ordinary skill in the art be further appreciated that implement the method for the above embodiments be can
It is completed with instructing relevant hardware by program, the program can be stored in a computer read/write memory medium
In, described storage medium, including ROM/RAM, disk, CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. a kind of passive frequency selective algorithm receiving circuit, the circuit include:Capacitance C1, carrier wave coupling coil T1, capacitance C7,
Inductance L4, capacitance C4, inductance L5, capacitance C5, inductance L6, capacitance C6, resistance R2, field-effect tube Q1, resistance R1, resistance R3, electricity
Hold C9, which is characterized in that the inductance L4 is in parallel with the capacitance C4, and it is the first LC filters, the first LC to connect with C7
Filter is serially connected in the circuit, and the inductance L5 in parallel with the capacitance C5 is the 2nd LC filters, the 2nd LC filters
Wave device is serially connected in the circuit, and the inductance L6 is in parallel with the capacitance C6, and it is the 3rd LC filters, the electricity to connect with C8
Hold C8 to be serially connected between the capacitance C6 and the capacitance C4, the 3rd LC filters are serially connected in the circuit, the electricity
It hinders R3, resistance R2 and field-effect tube Q1 forms attenuator circuit, the attenuator circuit is serially connected in the circuit, the attenuator circuit
For being divided to filtered high-frequency signal, so that the high-frequency signal reaches decaying, the resistance R1 is serially connected with institute
It states between the grid of field-effect tube and source electrode, the signal output end of the passive frequency selective algorithm receiving circuit is located at the electricity
Hinder R2 and resistance R3 between, the capacitance C1 connects with the coupling coil T1, and be linked into power line zero curve and firewire it
Between.
2. circuit as described in claim 1, which is characterized in that the first LC filters act as filter passband low side
Cutoff frequency, cutoff frequency 125KHz.
3. circuit as described in claim 1, which is characterized in that the 2nd LC filters act as high side of filter passband
Cutoff frequency, cutoff frequency 140KHz.
4. circuit as described in claim 1, which is characterized in that the 3rd LC filters act as filter passband low side
Cutoff frequency, cutoff frequency 125KHz.
5. such as Claims 1 to 4 any one of them circuit, which is characterized in that the circuit further includes：Diode D1, two poles
Pipe D2, the diode D1 and diode D2 are combined as resistance width resistance.
6. circuit as claimed in claim 5, which is characterized in that it is described resistance width resistance be used for by partial pressure high-frequency signal into
Row amplitude limit.
7. circuit as claimed in claim 6, which is characterized in that the amplitude limit resistance will pass through the high-frequency signal amplitude limit divided and be
0.7V。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607442.7A CN105071781B (en) | 2015-09-22 | 2015-09-22 | A kind of passive frequency selective algorithm receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607442.7A CN105071781B (en) | 2015-09-22 | 2015-09-22 | A kind of passive frequency selective algorithm receiving circuit |
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| Publication Number | Publication Date |
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| CN105071781A CN105071781A (en) | 2015-11-18 |
| CN105071781B true CN105071781B (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510607442.7A Active CN105071781B (en) | 2015-09-22 | 2015-09-22 | A kind of passive frequency selective algorithm receiving circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112383316B (en) * | 2020-11-20 | 2023-02-28 | 歌尔科技有限公司 | Touch control and antenna shared circuit and portable communication equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202034974U (en) * | 2011-03-09 | 2011-11-09 | 中国振华电子集团智能科技有限责任公司 | Coupling device used for isolating and matching signals |
| CN202085136U (en) * | 2011-03-09 | 2011-12-21 | 中国振华电子集团百智科技有限公司 | Carrier signal receive filter device for power line carrier communication |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4241400B2 (en) * | 2004-01-09 | 2009-03-18 | 株式会社豊田中央研究所 | Balanced line-unbalanced line connector |
| CN201928242U (en) * | 2011-03-09 | 2011-08-10 | 中国振华电子集团百智科技有限公司 | Automatic gain control device for power line carrier communication |
| CN205160483U (en) * | 2015-09-22 | 2016-04-13 | 浙江方大智控科技有限公司 | Passive frequency -selecting filter attenuation receiving circuit |
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- 2015-09-22 CN CN201510607442.7A patent/CN105071781B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202034974U (en) * | 2011-03-09 | 2011-11-09 | 中国振华电子集团智能科技有限责任公司 | Coupling device used for isolating and matching signals |
| CN202085136U (en) * | 2011-03-09 | 2011-12-21 | 中国振华电子集团百智科技有限公司 | Carrier signal receive filter device for power line carrier communication |
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| CN105071781A (en) | 2015-11-18 |
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