CN209676220U - A kind of multi-standard amplifier for automobile radio system - Google Patents
A kind of multi-standard amplifier for automobile radio system Download PDFInfo
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- CN209676220U CN209676220U CN201920788133.8U CN201920788133U CN209676220U CN 209676220 U CN209676220 U CN 209676220U CN 201920788133 U CN201920788133 U CN 201920788133U CN 209676220 U CN209676220 U CN 209676220U
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Abstract
The utility model discloses a kind of multi-standard amplifier for automobile radio system, including antenna end, multiple signal amplification circuits and receiving end, the audio signal that antenna end receives multiple types inputs to the multiple signal amplification circuit, output is to receiving end after the amplification of the multiple signal amplification circuit, antenna end and receiving end at least one end have multiple audio signals to be combined, each signal amplification circuit includes an input impedance matching circuit, one signal amplifier and an output impedance match circuit, output and input the audio signal of other out-of-band standards where impedance matching circuit is respectively serve to separate received signal in the input terminal and output end of signal amplifier.The utility model avoids interfering with each other for different frequency bands signal, and saves the cost of transmission line and connector, facilitates the design of antenna part.
Description
Technical field
The utility model relates to a kind of amplifiers, amplify more particularly, to a kind of multi-standard for automobile radio system
Device.
Background technique
The amplifier majority of existing automotive entertainment system is single channel input single channel output, and this design reduces amplifiers
Design difficulty, but this design needs to have more a transmission lines or connector connection antenna in input terminal, in output end
A transmission lines or connector can equally be had more.To considerably increase cost.Assembling process of the transmission line having more in vehicle
In also increase workload, and it is possible that misconnection.
In order to overcome the problems, such as that above-mentioned single channel input single channel output design scheme exists, there are also existing the shapes of combining input
Formula, but this design is usually that the signal of two neighboring frequency band is done broadband amplification, can not thus be accomplished between frequency band
Isolation, just not can avoid the interference of nearby frequency bands signal in practical applications.It secondly is exactly required for the signal of different frequency bands
Signal amplification factor is also difference, so can not meet actual requirement simultaneously using wideband amplifying circuit.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of more systems for automobile radio system
Formula amplifier.
To achieve the above object, the utility model proposes following technical solutions: a kind of more systems for automobile radio system
Formula amplifier, including antenna end, multiple signal amplification circuits and receiving end, the antenna end receive the audio signal of multiple types
The multiple signal amplification circuit is inputed to, output is to receiving end, the antenna after the amplification of the multiple signal amplification circuit
End and receiving end at least one end have multiple audio signals to be combined；Each signal amplification circuit is at least corresponding to receive a kind of standard
Audio signal, and each signal amplification circuit includes an input impedance matching circuit, a signal amplifier and an output impedance
With circuit, the input terminal incoming audio signal of the input impedance matching circuit, the input terminal phase of output end and signal amplifier
Even, the output of the signal amplifier terminates output impedance match circuit, the input impedance matching circuit and output impedance
Other out-of-band systems where being respectively serve to separate received signal in the input terminal and output end of signal amplifier with circuit
The audio signal of formula.
Preferably, the audio signal of the multiple types include amplitude-modulated signal, FM signal, digital audio broadcasting signal,
The combination of three kinds or more signal in keyless entry signal, vision signal.
Preferably, high-pass filter, low-pass filter, bandreject filtering may be selected in the impedance matching circuit that outputs and inputs
One of device and bandpass filter.
Preferably, the audio signal of the multiple types includes amplitude-modulated signal, FM signal and digital audio broadcasting signal,
And the amplitude-modulated signal, FM signal and digital audio broadcasting signal are combined and input to the multiple signal amplification circuit, often
The corresponding signal amplification circuit of the audio signal of kind standard, and be all combined after the amplification of corresponding signal amplification circuit
Output.
Preferably, the audio signal of the multiple types include amplitude-modulated signal, FM signal, digital audio broadcasting signal and
Vision signal, and the amplitude-modulated signal, FM signal, digital audio broadcasting signal and vision signal be combined input to it is described more
A signal amplification circuit, the corresponding signal amplification circuit of the audio signal of every kind of standard；And the amplitude-modulated signal, frequency modulation are believed
Number, digital audio broadcasting signal through corresponding signal amplification circuit amplification after be combined output, the vision signal is through correspondence
Signal amplification circuit amplification after single channel export.
Preferably, the corresponding signal amplification circuit of the digital audio broadcasting signal and the corresponding signal amplification of vision signal
Circuit shares a signal amplifier.
Preferably, the audio signal of the multiple types includes that FM signal, keyless entry signal and digital audio are wide
Broadcast signal, and the combining of the FM signal, keyless entry signal inputs to the multiple signal amplification circuit, every kind of standard
Audio signal corresponds to a signal amplification circuit, and the digital audio broadcasting signal single channel inputs to corresponding signal amplification electricity
Road；The FM signal, digital audio broadcasting signal are combined output, the nothing after the amplification of corresponding signal amplification circuit
Key entering signal single channel after the amplification of corresponding signal amplification circuit exports.
Preferably, the signal amplifier is low-noise amplifier LNA, and it uses integrated chip to realize.
Preferably, the signal amplifier is low-noise amplifier LNA, and it is used including field-effect tube or triode
Discrete device realize.
Preferably, the audio signal of the multiple types receives from the same antenna end and enters, and the antenna end is automobile
Window type antenna, overhead mast antenna or fin formula antenna.
The beneficial effects of the utility model are:
1, the utility model is respectively provided with effective band filter by the input and output side in amplifier, so that different
Signal isolation between frequency band reaches ideal effect, avoids interfering with each other for different frequency bands signal, while can be adjusted flexibly
The signal amplification factor of different frequency bands, so that the combining form of amplifier becomes diversity, to realize the conjunction of multiple-frequency signal
Road input, combining output or the input of band segment branch, combining output or combining input again flexibly answering for branch output
With client can be allowed to have multifarious selection in the selection that frequency range combines.
2, the utility model can also save the cost of transmission line and connector in actual production, can also reduce peace
Step is filled, misconnection when installation can be also prevented.In addition combining input also facilitates the design of antenna part, does not need needle
A stand-alone antenna individually designed to each frequency range, effectively can design antenna using limited space.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model embodiment 1；
Fig. 2 is the structural block diagram of the utility model embodiment 2；
Fig. 3 is the structural block diagram of the utility model embodiment 3.
Specific embodiment
Below in conjunction with the attached drawing of the utility model, the technical solution of the utility model embodiment is carried out clear, complete
Description.
A kind of revealed multi-standard amplifier for automobile radio system of the utility model, mainly passes through different resistances
Anti- match circuit solves interfering with each other between successive bands signal, while guaranteeing that signal in each frequency range meets amplification and wants
It asks.
In conjunction with shown in FIG. 1 to FIG. 3, a kind of revealed multi-standard amplification for automobile radio system of the utility model
Device, including antenna end, multiple signal amplification circuits and receiving end, the audio signal of multiple types are received from the same antenna end,
Multiple signal amplification circuits, then amplified output are inputed to receiving end.In antenna end and receiving end at least one end have it is more
The case where a audio signal is combined.
When implementation, the audio signal of multiple types may include amplitude-modulated signal (AM, frequency range be 535KHz~1.7M),
FM signal (FM, frequency range be 76M~108M), digital audio broadcasting signal (DAB, frequency range are 174M~240M),
The combination of keyless entry signal (RKE), three kinds or more signal in vision signal (TV).
A kind of at least corresponding audio signal for receiving standard of each signal amplification circuit, and each signal amplification circuit is at least
Including an input impedance matching circuit, a signal amplifier and an output impedance match circuit, wherein input impedance matching circuit
Input terminal incoming audio signal, output end is connected with the input terminal of signal amplifier, and the output of signal amplifier terminates output
The input terminal and output end point of impedance matching circuit, input impedance matching circuit and output impedance match circuit in signal amplifier
The audio signal of other out-of-band standards where received signal Yong Yu not isolated out.When implementation, impedance is output and input
One of high-pass filter, low-pass filter, bandstop filter and bandpass filter may be selected with circuit.
It is revealed a kind of for automobile radio system specifically to introduce lower the utility model with several embodiments below
The structure of multi-standard amplifier.
Embodiment 1
As shown in Figure 1, a kind of revealed multi-standard amplification for automobile radio system of the utility model embodiment 1
Device, including antenna end, three signal amplification circuits and receiving end, wherein three signal amplification circuits are that amplitude-modulated signal is put respectively
Big circuit, FM signal amplifying circuit and digital audio broadcasting signal amplifying circuit, respectively correspond to amplitude-modulated signal, FM signal
It is amplified with digital audio broadcasting signal.
In the present embodiment 1, amplitude-modulated signal, FM signal and digital audio broadcasting signal from the same antenna end receive into
Enter, all combining inputs to three signal amplification circuits, and all combining is defeated again after the amplification of corresponding signal amplification circuit
Out to receiving end.
Each signal amplification circuit includes an input impedance matching circuit, a signal amplifier (LNA, low noise amplification
Device) and an output impedance match circuit.Specifically, amplitude-modulated signal amplifying circuit includes an amplitude-modulated signal input resistant matching electricity
Road, amplitude-modulated signal amplifier and amplitude-modulated signal output impedance match circuit, wherein amplitude-modulated signal input impedance matching circuit and tune
Width signal output impedance match circuit respectively in the input terminal and output end of amplitude-modulated signal amplifier for frequency modulation (FM) signal and
Digital audio broadcasting (DAB) signal is isolated, while guaranteeing that the intact of signal (i.e. amplitude modulation AM signal) of itself frequency range leads to
It crosses, that is, the audio signal of other standards of frequency band outer (i.e. outside frequency band 535KHz~1.7M) where isolating out amplitude-modulated signal.And it adjusts
Width signal output impedance match circuit guarantees that amplitude-modulated signal output impedance is to formulate impedance, if output impedance is 200~300 Europe
Nurse.
Likewise, FM signal amplifying circuit includes a FM signal input impedance matching circuit, FM signal amplifier
With FM signal output impedance match circuit, wherein FM signal input impedance matching circuit and FM signal output impedance
Amplitude modulation (AM) signal and digital audio broadcasting (DAB) are directed in the input terminal and output end of FM signal amplifier respectively with circuit
Signal is isolated, while guaranteeing intact the passing through of the signal (i.e. amplitude modulation FM signal) of itself frequency range, that is, isolates out amplitude modulation letter
The audio signal of other standards of frequency band outer (i.e. outside frequency band 76M~108M) where number.And FM signal output impedance matching electricity
Road guarantees that FM signal output impedance is 50 ohm.
Digital audio broadcasting signal amplifying circuit includes a digital audio broadcasting signal input impedance matching circuit, digital sound
Frequency broadcast singal amplifier and digital audio broadcasting signal output impedance match circuit, wherein digital audio broadcasting signal input
Impedance matching circuit and digital audio broadcasting signal output impedance match circuit are respectively in digital audio broadcasting signal amplifier
Input terminal and output end are isolated for amplitude modulation (AM) signal and frequency modulation (FM) signal, while guaranteeing the signal of itself frequency range
The intact of (i.e. digital audio broadcasting DAB signal) passes through, that is, outer (the i.e. frequency band of frequency band where isolating out digital audio broadcasting signal
Outside 174M~240M) other standards audio signal.And digital audio broadcasting signal output impedance match circuit guarantees number
Audio broadcast signal output impedance is 50 ohm.
To sum up, above-described embodiment 1 exports the signal combining input, combining of tri- frequency ranges of AM/FM/DAB.LNA amplifier
The signal cross-talk of successive bands is prevented, is protected simultaneously in conjunction with the impedance matching circuit of input and output using the scheme of integrated chip
Demonstrate,prove the signal amplification of itself frequency range.With the amplifier design ratio of existing single channel input and output, without the concern for adjacent to each other
The cross-interference issue of frequency range.And this
The implementation of 1 scheme of embodiment can be effectively reduced the connecting line and connector of input and output, also help simultaneously
Antenna is designed using limited space.
1 scheme of the present embodiment can be applied to automotive window type antenna, overhead mast antenna or fin formula antenna etc..
Embodiment 2
As shown in Fig. 2, a kind of revealed multi-standard amplification for automobile radio system of the utility model embodiment 2
Device, including four signal amplification circuits are amplitude-modulated signal amplifying circuit, FM signal amplifying circuit, digital audio broadcasting respectively
Signal amplification circuit and video signal amplification circuit are respectively corresponded to amplitude-modulated signal, FM signal and digital audio broadcasting signal
It amplifies.
In the present embodiment 2, amplitude-modulated signal, FM signal, digital audio broadcasting signal and vision signal are from the same antenna
Termination take in into, all combining input to four signal amplification circuits, through corresponding signal amplification circuit amplification after,
In, amplitude-modulated signal, FM signal, digital audio broadcasting signal combining output are to receiving end, and then single channel is exported to connecing vision signal
Receiving end.
Each signal amplification circuit includes an input impedance matching circuit, a signal amplifier (LNA, low noise amplification
Device) and an output impedance match circuit.Specifically, amplitude-modulated signal amplifying circuit, FM signal amplifying circuit and digital audio are wide
The structure and principle of broadcasting signal amplification circuit can refer to the description in above-described embodiment 1, be not described herein.
Video signal amplification circuit specifically includes a vision signal input impedance matching circuit and vision signal output impedance
Match circuit, wherein vision signal input impedance matching circuit and vision signal output impedance match circuit are respectively to amplitude modulation
(AM) signal, frequency modulation (FM) signal and digital audio broadcasting (DAB) signal are isolated, while guaranteeing the signal of itself frequency range
The intact of (i.e. video TV signal) passes through, that is, isolates out the audio signal of other out-of-band standards where vision signal.
In the present embodiment 2, digital audio broadcasting signal amplifying circuit and video signal amplification circuit share signal amplification
Device.
To sum up, the signal of tetra- frequency ranges of AM/FM/DAB/TV is combined input by above-described embodiment 2, and AM/FM/DAB combining is defeated
Out, TV single channel exports.In addition to it can obtain technical effect identical with above-described embodiment 1, which, which also resides in, facilitates client
Diversity choice, can individually be exported using a variety of combinings output or single frequency range in output, in input terminal combining input.
2 scheme of the present embodiment is similarly applied to automotive window type antenna, overhead mast antenna or fin formula antenna etc..
Embodiment 3
As shown in figure 3, a kind of revealed multi-standard amplification for automobile radio system of the utility model embodiment 3
Device, including three signal amplification circuits are FM signal amplifying circuit, keyless entry signal amplification circuit sum number word tone respectively
Frequency broadcast singal amplifying circuit respectively corresponds and carries out letter to FM signal, keyless entry signal and digital audio broadcasting signal
Number amplification.
In the present embodiment 3, FM signal, keyless entry signal and digital audio broadcasting signal are terminated from the same antenna
It takes in into, wherein FM signal, the combining input of keyless entry signal, then to input to its right for single channel for digital audio broadcasting signal
The signal amplification circuit answered, i.e. digital audio broadcasting signal correspondence input to digital audio broadcasting signal amplifying circuit.Through respective
After corresponding signal amplification circuit amplification, wherein the output of keyless entry signal single channel, FM signal, digital audio broadcasting letter
Number combining output.
Each signal amplification circuit includes an input impedance matching circuit, a signal amplifier (LNA, low noise amplification
Device) and an output impedance match circuit.Specifically, the knot of FM signal amplifying circuit and digital audio broadcasting signal amplifying circuit
Structure and principle can refer to the description in above-described embodiment 1, be not described herein.
Keyless entry signal amplification circuit specifically includes a keyless entry signal input impedance matching circuit and without key
Spoon entering signal output impedance match circuit, wherein keyless entry signal input impedance matching circuit and keyless entry letter
Number output impedance match circuit is directed to frequency modulation (FM) signal in the input terminal and output end of keyless entry signal amplifier respectively
It is isolated with digital audio broadcasting (DAB) signal, while guarantees the signal (i.e. keyless entry RKE signal) of itself frequency range
It is intact pass through, that is, isolate out the audio signal of other out-of-band standards where keyless entry signal.
To sum up, above-described embodiment 3 inputs the signal of tri- frequency ranges of FM/DAB/RKE, part (i.e. FM/RKE) combining, DAB
Single channel input；FM/DAB combining output, the output of RKE single channel.It, should in addition to it can obtain technical effect identical with above-described embodiment 1
Embodiment also resides in the diversity choice for facilitating client, can use a variety of combinings input or single frequency range list in input terminal
Solely input is combined output in output end or single frequency range individually exports.
3 scheme of the present embodiment is similarly applied to automotive window type antenna, overhead mast antenna or fin formula antenna etc..
In the scheme of 1~embodiment of above-described embodiment 3, main amplifier is the scheme using integrated chip, real
Completion can also be replaced when applying using discrete device (such as field-effect tube or triode).
And in addition to the embodiment that above-described embodiment 1~3 is introduced, the utility model can also have multiple audio signals all single
Road input, amplified all combinings output or part combining output；Or multiple audio signals are all combined input or portion
Combiner input, the alternative of amplified whole single channel output etc., as long as meeting at least one in antenna end and receiving end
End has the alternative of multiple audio signal combinings both to be within the protection scope of the present invention.
The technology contents and technical characteristic of the utility model have revealed that as above, however those skilled in the art still may be used
Can teaching based on the utility model and announcement and make various replacements and modification without departing substantially from the spirit of the present invention, therefore, this
Utility model protection range should be not limited to the revealed content of embodiment, and should include the various replacements without departing substantially from the utility model
And modification, and covered by present patent application claim.
Claims (10)
1. a kind of multi-standard amplifier for automobile radio system, which is characterized in that including antenna end, multiple signals amplification electricity
Road and receiving end, the audio signal that the antenna end receives multiple types inputs to the multiple signal amplification circuit, through described
Output has multiple audio signals to receiving end, the antenna end and receiving end at least one end after multiple signal amplification circuit amplifications
Combining；A kind of at least corresponding audio signal for receiving standard of each signal amplification circuit, and each signal amplification circuit includes one
Input impedance matching circuit, a signal amplifier and an output impedance match circuit, the input of the input impedance matching circuit
Incoming audio signal is held, output end is connected with the input terminal of signal amplifier, the output termination output resistance of the signal amplifier
The input terminal and output end of anti-match circuit, the input impedance matching circuit and output impedance match circuit in signal amplifier
The audio signal of other out-of-band standards where being respectively serve to separate received signal.
2. the multi-standard amplifier according to claim 1 for automobile radio system, which is characterized in that a variety of systems
The audio signal of formula include amplitude-modulated signal, FM signal, digital audio broadcasting signal, keyless entry signal, in vision signal
Three kinds or more signal combination.
3. the multi-standard amplifier according to claim 1 for automobile radio system, which is characterized in that it is described input and
One of high-pass filter, low-pass filter, bandstop filter and bandpass filter may be selected in output impedance match circuit.
4. the multi-standard amplifier according to claim 2 for automobile radio system, which is characterized in that a variety of systems
The audio signal of formula includes amplitude-modulated signal, FM signal and digital audio broadcasting signal, and the amplitude-modulated signal, FM signal and
Digital audio broadcasting signal, which is combined, inputs to the multiple signal amplification circuit, the corresponding letter of the audio signal of every kind of standard
Number amplifying circuit, and all combining output after the amplification of corresponding signal amplification circuit.
5. the multi-standard amplifier according to claim 2 for automobile radio system, which is characterized in that a variety of systems
The audio signal of formula includes amplitude-modulated signal, FM signal, digital audio broadcasting signal and vision signal, and the amplitude-modulated signal,
FM signal, digital audio broadcasting signal and vision signal, which are combined, inputs to the multiple signal amplification circuit, every kind of standard
The corresponding signal amplification circuit of audio signal；And the amplitude-modulated signal, FM signal, digital audio broadcasting signal are through respective
Output is combined after corresponding signal amplification circuit amplification, vision signal single channel after the amplification of corresponding signal amplification circuit is defeated
Out.
6. the multi-standard amplifier according to claim 5 for automobile radio system, which is characterized in that the number sound
The corresponding signal amplification circuit of frequency broadcast singal and the corresponding signal amplification circuit of vision signal share a signal amplifier.
7. the multi-standard amplifier according to claim 2 for automobile radio system, which is characterized in that a variety of systems
The audio signal of formula includes FM signal, keyless entry signal and digital audio broadcasting signal, and the FM signal, without key
Spoon entering signal combining inputs to the multiple signal amplification circuit, the corresponding signal amplification electricity of the audio signal of every kind of standard
Road, the digital audio broadcasting signal single channel input to corresponding signal amplification circuit；The FM signal, digital audio broadcasting
Signal is combined output after the amplification of corresponding signal amplification circuit, and the keyless entry signal amplifies through corresponding signal
Single channel exports after circuit amplification.
8. the multi-standard amplifier according to claim 1 for automobile radio system, which is characterized in that the signal is put
Big device is low-noise amplifier LNA, and it uses integrated chip to realize.
9. the multi-standard amplifier according to claim 1 for automobile radio system, which is characterized in that the signal is put
Big device is low-noise amplifier LNA, and it uses and realizes including the discrete device of field-effect tube or triode.
10. the multi-standard amplifier according to claim 1 for automobile radio system, which is characterized in that described a variety of
The audio signal of standard from the same antenna end receive enter, the antenna end be automotive window type antenna, overhead mast antenna or
Fin formula antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920788133.8U CN209676220U (en) | 2019-05-29 | 2019-05-29 | A kind of multi-standard amplifier for automobile radio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920788133.8U CN209676220U (en) | 2019-05-29 | 2019-05-29 | A kind of multi-standard amplifier for automobile radio system |
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| Publication Number | Publication Date |
|---|---|
| CN209676220U true CN209676220U (en) | 2019-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920788133.8U Active CN209676220U (en) | 2019-05-29 | 2019-05-29 | A kind of multi-standard amplifier for automobile radio system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412109A (en) * | 2022-07-20 | 2022-11-29 | 岚图汽车科技有限公司 | In-vehicle sound signal transmission system and method |
-
2019
- 2019-05-29 CN CN201920788133.8U patent/CN209676220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412109A (en) * | 2022-07-20 | 2022-11-29 | 岚图汽车科技有限公司 | In-vehicle sound signal transmission system and method |
| CN115412109B (en) * | 2022-07-20 | 2023-10-13 | 岚图汽车科技有限公司 | In-car receiving signal transmission system and transmission method |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Kunshan Dianshan Lake Town City Suzhou city Jiangsu province 215345 Shen road, No. 6 Patentee after: Rosenberg Technology Co.,Ltd. Address before: Kunshan Dianshan Lake Town City Suzhou city Jiangsu province 215300 Shen road, No. 6 Patentee before: ROSENBERGER TECHNOLOGY ( KUNSHAN) Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215300 No.6 Shen'an Road, Dianshanhu Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: ProLogis Communication Technology (Suzhou) Co.,Ltd. Address before: 215345 No. 6 Shen'an Road, Dianshan Lake Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Rosenberg Technology Co.,Ltd. |