CN207926547U - A kind of reconfigurable filter - Google Patents
A kind of reconfigurable filter Download PDFInfo
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- CN207926547U CN207926547U CN201820333984.9U CN201820333984U CN207926547U CN 207926547 U CN207926547 U CN 207926547U CN 201820333984 U CN201820333984 U CN 201820333984U CN 207926547 U CN207926547 U CN 207926547U
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- filter
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Abstract
The utility model discloses a kind of reconfigurable filters, including：At least one switch module, at least two mutual cascade resonance circuits, each switch module are connected at least one resonance circuit, and switch module is used to control the number for the resonance circuit for participating in resonance.The utility model have meet state's network mark it is quasi- in the case of, transmitter and receiver are in switch operating frequency range without needing to change hardware device so that the advantages of reducing cost, accelerate frequency range processing speed.
Description
Technical field
The utility model is related to field of communication technology, more particularly to a kind of reconfigurable filter.
Background technology
More and more extensive with the application of power-line carrier communication, people by power line medium into row information to being passed
Defeated requirement is also increasingly stringenter.IEEE1901, ITU-T based on OFDM technology G.9960 with national grid power line transmission
Standard (hereinafter referred to as state's network mark is accurate) is also just come into being.State's network mark standard has been done corresponding based on the technology of IEEE1901
Enhancing.State's network mark standard uses the different several frequency ranges of bandwidth for different application scenarios and carries out data transmission.For example, state
The subcarrier serial number 80-490 of net standard bands 0, the subcarrier serial number 100-230 of state's net standard bands 1.If coding staff
Formula is identical with modulation system, and in general, communication can be improved using the relatively narrow frequency range close to low frequency in power line carrier communication
Transmission range；It is transmitted using wider frequency section（Especially with high frequency subcarriers）Data throughout can be improved but communication can be reduced and passed
Defeated distance.In current state's network mark standard, operation of receiver can not receive the data for the frequency range 1 that transmitter is sent in frequency range 0
Packet, vice versa.
Since the filter in hardware device in the prior art only supports a band（Frequency range）Filtering, each hardware dress
For the filter set as shown in Fig. 1 a ~ Fig. 2 b, Fig. 1 a are the circuit structure signal of difference filter in Band2 high-pass filters
Figure；Fig. 1 b are the electrical block diagram of single-ended filter in Band2 high-pass filters；Fig. 2 a are in Band1 high-pass filters
The electrical block diagram of difference filter；Fig. 2 b are the electrical block diagram of the single-ended filter of Band1 high-pass filters；
Therefore when transmitter and receiver needs are switched to another frequency range from a frequency range, communicating pair is needed to re-replace not
Same hardware device, to realize the switching of filter.In the communication system for meeting IEEE1901 and ITU-T G.9960 agreement
In also have similar problems.
Utility model content
The purpose of this utility model is to provide a kind of reconfigurable filter, realizes that solution is above-mentioned in the feelings for meeting state's network mark standard
Under condition, the problem of transmitter and receiver must replace hardware device in switch operating frequency range, and reach with hardware cost
It is low, the purpose of the fast characteristic of processing speed.
In order to reach object above, the utility model is achieved through the following technical solutions.
A kind of reconfigurable filter, including：At least one switch module, at least two mutual cascade resonance circuits, often
A switch module is connected at least one resonance circuit, and the switch module, which is used to control, participates in the described humorous of filtering
It shakes the number of circuit.
Preferably, the resonance circuit is LC resonance circuit.
Preferably, when the conducting of the switch module, the number for participating in the resonance circuit of filtering increases；The switch
When being not turned on of module, the number for participating in the resonance circuit of filtering are reduced.
Preferably, the switch module is the switching circuit that NPN triode and PNP triode form；Wherein, the PNP
Triode is connected for switching, and the NPN triode is used to control the on or off state of the PNP triode；Alternatively, institute
State NPN triode for switch connect, the NPN triode is for controlling the on and off of the PNP triode.
Another technical solution of the utility model is a kind of reconfigurable filter, including：At least one switch module,
Band1 difference filters or Band1 single-ended filters, the switch module and Band1 difference filters or Band1 single-ended filters
Filter capacitor C3 in device and filter inductance L2 series connection, it is in parallel with capacitance C1.
Preferably, when filter is Band1 difference filters, and the state of the switch is conducting state, the filtering
Device is the Band1 difference filters that frequency response is filtered to Band1；When the state of the switch is in off state, the filtering
Device is the Band2 difference filters that frequency response is filtered to Band2.
Preferably, when filter is Band1 single-ended filters, and the state of the switch is conducting state, the filtering
Device is the Band1 single-ended filters that frequency response is filtered to Band1；When the state of the switch is in off state, the filtering
Device is the Band2 single-ended filters that frequency response is filtered to Band2.
Preferably, the switch is the switching circuit that NPN triode and PNP triode form；Wherein, tri- poles the PNP
Pipe is used to control the on or off state of the PNP triode for switching connection, the NPN triode；Alternatively, described
NPN triode is connected for switching, and the NPN triode is used to control the on and off of the PNP triode.
Preferably, when the PNP triode is for switching connection, the collector 1 of the PNP triode and close capacitance
One end branch line conductor connection of C1；The emitter 2 of the PNP triode is connect with one end of filter capacitor C3, the filtered electrical
The other end for holding C3 is connect with filter inductance L2；The emitter 2 of the PNP triode also accesses power supply VCC by a resistance；Institute
The base stage for stating PNP triode is connected by a resistance and the collector of NPN triode；The emitter of the NPN triode is grounded,
The base stage incoming control signal of the NPN triode.
Preferably, when it is low level to control signal, the PNP triode is not turned on to form high resistant, the NPN triode
It is high resistant with the concatenated filter inductance L2 of the NPN triode and filter capacitor C3 impedances；The control signal is high level
When, the PNP triode is connected to form low-resistance, the NPN triode and concatenated L2, C3 impedance of NPN triode be rendered as L2,
The impedance of C3.
The utility model has the following advantages compared with prior art.
The utility model by using on the basis of not changing the component values of low-pass filter pass through control switch
Switching, which is realized, changes the number of LC resonance circuit to realize the reconstruct to low-pass filter, changes the frequency response of low-pass filter.
The utility model has hardware cost low, the fast advantage of conversion speed.
It is switched over using control Signal-controlled switch, when switching imports different resonance circuits, to complete to filter
The reconstruct of wave device, using one or N number of switch realizes the reconstruct of two or more filters（It is not limited to N+1 kinds）, the application is suitable
For single-ended or difference filter；High pass, low pass, band logical, bandstop filter；Butterworth, Chebyshev's I type II types are oval
Function, the different types such as Bayside.
The switching circuit of the utility model, which can be used BJT or field-effect tube etc. and can be used for the device of switching circuit, can be applied to
The sef-adapting filter of phase same order or not same order, and do not limit to the number of switching circuit, i.e., sef-adapting filter can be realized multiple
Band's is adaptive.
Description of the drawings
Fig. 1 a are the electrical block diagram of difference filter in Band2 high-pass filters in the prior art；
Fig. 1 b are the electrical block diagram of single-ended filter in Band2 high-pass filters in the prior art；
Fig. 2 a are the electrical block diagram of difference filter in Band1 high-pass filters in the prior art；
Fig. 2 b are the electrical block diagram of the single-ended filter of Band1 high-pass filters in the prior art；
Fig. 3 is that the circuit structure of the difference sef-adapting filter of one embodiment high-pass filter in the utility model shows
It is intended to；
Fig. 4 is that the circuit structure of the single-ended sef-adapting filter of one embodiment high-pass filter in the utility model shows
It is intended to；
Fig. 5 is that the impact of performance schematic diagram that Band2 and Band1 adaptively switch is realized by the way of in Fig. 3 or Fig. 4；
Fig. 6 is the schematic diagram of the component values of low-pass filter；
Fig. 7 is the schematic diagram of the component values of the low-pass filter after reconstruct；
Fig. 8 is the signal of the component values of the low-pass filter after the increase switch of one embodiment of the utility model
Figure；
Fig. 9 is the frequency response impact of performance for two kinds of different filters that different filter reconstruct are realized by the way of in Fig. 8
Schematic diagram；
Figure 10 is the electrical block diagram of the switch in a kind of restructural filter of the utility model.
Specific implementation mode
The utility model is done and is further explained by the way that a preferable specific embodiment is described in detail below in conjunction with attached drawing
It states.
According to filter design theory, high-pass filter, bandpass filter, bandstop filter prototype be all low-pass filtering
Device, thus with low-pass filter come illustrate the utility model can realize filter reconstruct principle.
In conjunction with shown in Fig. 6 ~ Fig. 8, Fig. 6 is the component values of low-pass filter, can be applied to Butterworth or Qie Bixue
The filter of husband's type.
It to be reconstructed into another filter on the basis of not changing current component values and obtaining, new resonance electricity can be added
Road increases new zero, to change the frequency response curve of filter, for example, as shown in fig. 7, low-pass filter prototype
On the basis of increase a resonance circuit, i.e., connect a filter inductance gn+1 between resistance gn+3 and filter capacitor gn, and
Join a filter capacitor gn+2, to change the frequency response of low-pass filter as shown in figure 9, when frequency is in 15MHz's or more
Signal can be filtered, and the frequency signal of 15MMHz can be very good to pass through.Therefore, when increase filter resonance circuit,
The frequency response of filter can be changed, otherwise the resonance circuit for reducing filter can also change its frequency response.Similarly high pass, band logical,
Filter with types such as resistances can also use identical method.
In order to realize above-mentioned reconstruct or the switching of two kinds of filters, as shown in figure 8, the utility model passes through each
One switch module is set between a LC resonance circuit.LC is increased or decreased using the characteristic of the on and off of switch module
Resonance circuit realizes different filters to realize the reconstruct in the hardware device of same transmitter or receiver to filter
Wave effect.Since the state of switch module is different, the frequency response of filter is different, because of the referred to herein as above-mentioned filter that can be reconstructed
It can be referred to as sef-adapting filter.
As shown in figure 8, when the switch module conducting between filter capacitor gn and filter inductance gn+1, by filtered electrical
This LC resonance circuit for feeling gn+1 and filter capacitor gn+2 compositions participates in resonance；When switch is not turned on, above-mentioned filter inductance
Gn+1 and filter capacitor gn+2 are bypassed, and are not involved in resonance, therefore switch module state is different, and the filter effect of generation is not yet
Together.
By parity of reasoning, when increasing multiple switch module in foregoing circuit, by controlling opening for above-mentioned multiple switch module
Or close, the filter effect that can be adjusted is more, therefore can generate more filtering characteristics.
Another embodiment of the utility model is restructural high-pass filter.As shown in figure 3, the utility model one kind can
The difference filter of reconstruct, including：Switch, Band1 difference filters, above-mentioned switch and the filtering in Band1 difference filters
Capacitance C3 and filter inductance L2 series connection, it is in parallel with capacitance C1.According to current filtering frequency range needs, by controlling in signal control
State the state of the on and off of switch.When the state of above-mentioned switch is conducting state, which is Band1 differential filterings
Device can be filtered frequency response to Band1.When the state of above-mentioned switch is in off state, which is Band2 difference
Filter can be filtered frequency response to Band2.
As shown in figure 4, a kind of restructural difference filter of the utility model, including：Switch, Band1 single-ended filters,
Above-mentioned switch in Band1 single-ended filters filter capacitor C3 and filter inductance L2 connect, it is in parallel with capacitance C1.According to current
Filtering frequency range need, by control signal control above-mentioned switch on and off state.When the state of above-mentioned switch is
When conducting state, which is Band1 single-ended filters, can be filtered frequency response to Band1.When the shape of above-mentioned switch
When state is in off state, which is Band2 single-ended filters, can be filtered frequency response to Band2.
Utilization as shown in Figure 10 may be used in one embodiment according to the present utility model, above-mentioned switch or switch module
The switching circuit of NPN triode and PNP triode composition realizes that wherein PNP triode is connected for switching, and NPN triode is used
In the on or off state of control PNP triode.Switch connection can also be carried out using NPN triode, NPN triode is used for
Control the on and off of PNP triode.
Shown in Figure 10 for PNP triode for switch connect, NPN triode be used for control PNP triode conducting or
Cut-off state, wherein the switch first end 1 in the collector 1 and Fig. 3 and Fig. 4 of PNP triode are corresponding, i.e., with close to capacitance C1
The connection of one end branch line conductor.Switch second end 2 in the emitter 2 and Fig. 3 and Fig. 4 of PNP triode is corresponding, i.e., with it is close
One end of filter capacitor C3 connects, and accesses power supply VCC by a resistance.The base stage of PNP triode passes through a resistance and NPN tri-
The collector of pole pipe connects.The emitter of NPN triode is grounded, the base stage incoming control signal of NPN triode.
When it is low level to control signal, PNP triode is not turned on（Cut-off state）Form high resistant, NPN triode and NPN
The concatenated filter inductance L2 of triode and filter capacitor C3 impedances are high resistant.Then the filter in Fig. 3 and Fig. 4 is reconstructed into respectively
Band2 difference filters and Band2 single-ended filters.
When it is high level to control signal, PNP triode is connected to form low-resistance, and NPN triode is concatenated with NPN triode
L2, C3 impedance are rendered as the impedance of L2, C3, then the filter in Fig. 3 and Fig. 4 be reconstructed into respectively Band1 difference filters and
Band1 single-ended filters.
Fig. 5 shows the filtering performance to high-frequency signal of the filter of the reconstruct under both control signals, by scheming
Understand that the filter of above-mentioned reconstruct can reach the adaptive switching to Band1 and Band2.
One embodiment according to the present utility model, the invention also discloses a kind of reconstructing methods of filter, should
Reconstructing method can be applied in power-line carrier communication system.
By controlling the on or off state for the switch module being arranged between N number of resonance circuit, and then controls and participate in
The number of the resonance circuit of filtering, to meet the filtering to multiple frequency range signal.When switch module is connected, switch module resistance
It is anti-to be rendered as low-resistance, switch module and it is rendered as the device impedance of itself with the concatenated device resistance of switch module, participates in filter
Wave plays the effect of filtering；If switch module is not turned on, switch module impedance is rendered as high resistant, switch module and and switching molding
The concatenated device resistance of block is high resistant, is equivalent to open-circuit condition, no filter effect.And then realize the function of different filter effects,
Meet the filtering requirements of different frequency range.
It follows that if necessary to the switching of multiple frequency ranges, the shape of different switches can be utilized by increasing multiple switch
State realizes a variety of filter effects.The form of the unlimited filter of the utility model, can be applied to Butterworth, and Chebyshev is oval
A plurality of types of low passes such as function, band logical, high pass or bandstop filter.The use of the switch is including but not limited to BJT or FET etc.
It can be used for the device of switching circuit.
Although the content of the utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the scope of protection of the utility model should be by appended
Claim limit.
Claims (10)
1. a kind of reconfigurable filter, which is characterized in that include：At least one switch module, at least two is mutually cascade humorous
Shake circuit, and each switch module is connected at least one resonance circuit, and the switch module participates in filter for controlling
The number of the resonance circuit of wave.
2. reconfigurable filter as described in claim 1, which is characterized in that the resonance circuit is LC resonance circuit.
3. reconfigurable filter as described in claim 1, which is characterized in that when the conducting of the switch module, participate in filtering
The resonance circuit number increase；When being not turned on of the switch module participates in the number of the resonance circuit of filtering
It reduces.
4. the reconfigurable filter as described in claim 1 or 3, which is characterized in that the switch module is
The switching circuit of NPN triode and PNP triode composition；
Wherein, the PNP triode for switch connect, the NPN triode be used for control the PNP triode conducting or
Cut-off state；Alternatively, the NPN triode is connected for switching, the NPN triode is for controlling the PNP triode
On and off.
5. a kind of reconfigurable filter, which is characterized in that include：At least one switch module, Band1 difference filters or
Band1 single-ended filters, the switch module and the filter capacitor C3 in Band1 difference filters or Band1 single-ended filters
It connects with filter inductance L2, it is in parallel with capacitance C1.
6. reconfigurable filter as claimed in claim 5, which is characterized in that
When filter is Band1 difference filters, and the state of the switch is conducting state, the filter is to Band1
It is filtered the Band1 difference filters of frequency response；When the state of the switch is in off state, the filter is to Band2
It is filtered the Band2 difference filters of frequency response.
7. reconfigurable filter as claimed in claim 5, which is characterized in that when filter be Band1 single-ended filters, it is described
When the state of switch is conducting state, the filter is the Band1 single-ended filters that frequency response is filtered to Band1；It is described
When the state of switch is in off state, the filter is the Band2 single-ended filters that frequency response is filtered to Band2.
8. the reconfigurable filter as described in claim 5 or 6 or 7, which is characterized in that
The switch is the switching circuit that NPN triode and PNP triode form；
Wherein, the PNP triode for switch connect, the NPN triode be used for control the PNP triode conducting or
Cut-off state；Alternatively, the NPN triode is connected for switching, the NPN triode is for controlling the PNP triode
On and off.
9. reconfigurable filter as claimed in claim 8, which is characterized in that
When the PNP triode is for switching connection, the collector 1 of the PNP triode and one end branch close to capacitance C1
Line conductor connects；The emitter 2 of the PNP triode is connect with one end of filter capacitor C3, and the filter capacitor C3's is another
End is connect with filter inductance L2；The emitter 2 of the PNP triode also accesses power supply VCC by a resistance；Tri- poles the PNP
The base stage of pipe is connected by a resistance and the collector of NPN triode；The emitter of the NPN triode is grounded, the NPN tri-
The base stage incoming control signal of pole pipe.
10. reconfigurable filter as claimed in claim 9, which is characterized in that when it is low level to control signal, the PNP
Triode is not turned on to form high resistant, the NPN triode and the concatenated filter inductance L2 of the NPN triode and filter capacitor
C3 impedances are high resistant；The control signal be high level when, the PNP triode is connected to form low-resistance, the NPN triode with
Concatenated L2, C3 impedance of NPN triode is rendered as the impedance of L2, C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333984.9U CN207926547U (en) | 2018-03-12 | 2018-03-12 | A kind of reconfigurable filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333984.9U CN207926547U (en) | 2018-03-12 | 2018-03-12 | A kind of reconfigurable filter |
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| CN207926547U true CN207926547U (en) | 2018-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134591A (en) * | 2018-03-12 | 2018-06-08 | 上海物麒科技有限公司 | A kind of reconfigurable filter |
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2018
- 2018-03-12 CN CN201820333984.9U patent/CN207926547U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134591A (en) * | 2018-03-12 | 2018-06-08 | 上海物麒科技有限公司 | A kind of reconfigurable filter |
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Effective date of registration: 20190510 Address after: 215310 11th Floor, Block C, Haichuang Building, 288 Dengyun Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kungao New Core Microelectronics (Jiangsu) Co.,Ltd. Address before: 200000 Pudong New Area, Shanghai, China (Shanghai) free trade trial area, No. 3, 1 1, Fang Chun road. Patentee before: SHANGHAI WU QI TECHNOLOGIES, Inc. |
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Effective date of registration: 20200428 Address after: 201207 Shanghai City, Pudong New Area Chinese (Shanghai) free trade zone fanchun Road No. 400 Building 1 layer 3 Patentee after: SHANGHAI WU QI TECHNOLOGIES, Inc. Address before: 215310 11th Floor, Block C, Haichuang Building, 288 Dengyun Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Kungao New Core Microelectronics (Jiangsu) Co.,Ltd. |
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Effective date of registration: 20230809 Address after: 401120 14th Floor, 107 Daguzhong Road, Xiantao Street, Yubei District, Chongqing Patentee after: WU QI TECHNOLOGIES, Inc. Address before: 201207 Pudong New Area, Shanghai, China (Shanghai) free trade trial area, No. 3, 1 1, Fang Chun road. Patentee before: SHANGHAI WU QI TECHNOLOGIES, Inc. |