FM + DAB signal amplification circuit and electronic equipment thereof

Abstract

The utility model provides an FM + DAB signal amplification circuit and electronic equipment thereof, and relates to the technical field of signal amplification, the circuit comprises a receiving port antenna input port, an amplifier circuit, a power divider circuit, an LC band elimination filter circuit and an output module, a receiving port is electrically connected with the input end of the amplifier circuit, and the output module is electrically connected with the input end of the power divider circuit. The output end of the amplifier circuit is connected with the input end of the power divider circuit, the output end of the power divider circuit is connected with the input end of the LC band-stop filter circuit, the output end of the LC band-stop filter circuit is connected with the output module, and the receiving port is configured to receive a DAB / FM signal. According to the amplifying circuit, an LCR is used for building a power dividing circuit, an LC filter circuit is used, and the signal amplifying requirement of two frequency bands of two receivers is met through one amplifying circuit.

Description

TECHNICAL FIELD

[0001] The utility model relates to signal amplification technical field, concretely relates to a FM + DAB signal amplification circuit and electronic equipment thereof. BACKGROUND

[0002] DAB (Digital Audio Broadcasting) is a kind of digital audio broadcasting technology, it allows broadcasting station to transmit audio signal in digital format, provides close CD quality sound, and can transmit other forms signal including high-quality audio.FM (Frequency Modulation) is frequency modulation, it is a kind of modulation technology using the change of carrier frequency to carry information.

[0003] Current market existing amplification circuit form is generally divided into two kinds, one is FM and DAB two-way signal two antenna inputs respectively amplification, namely FM and DAB signal input and output respectively;Another is FM and DAB using one antenna input through matching circuit is divided into two-way signal amplification two-way output.These methods are all using two-way signal amplification circuit, there is the problem of higher cost, difficult debugging.

[0004] Therefore, the present application is proposed. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of FM+DAB signal amplification circuit and electronic equipment thereof, can at least partially improve the above problems.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A kind of FM+DAB signal amplification circuit, it includes: receiving port, amplifier circuit, power divider circuit, LC band-stop filter circuit and output module, wherein, the receiving port is electrically connected with the input end of the amplifier circuit, the output end of the amplifier circuit is electrically connected with the input end of the power divider circuit, the output end of the power divider circuit is electrically connected with the input end of the LC band-stop filter circuit, the output end of the LC band-stop filter circuit is electrically connected with the output module, the receiving port is configured to receive DAB / FM signal;

[0008] The power divider circuit is configured to divide the received DAB / FM signal into two-way DAB / FM signal;

[0009] The LC band-stop filter circuit consists of a DAB band-stop filter and an FM band-stop filter. The DAB band-stop filter is configured to filter the DAB signal in one DAB / FM signal and output an FM signal. The FM band-stop filter is configured to filter the FM signal in another DAB / FM signal and output a DAB signal.

[0010] Preferably, the receiving port is an antenna.

[0011] Preferably, it further includes a dual-channel DC power supply isolation module, the second terminal of which is electrically connected to a +12V power supply, and the first terminal of which is electrically connected to the first terminal of the output module.

[0012] Preferably, the output module uses a FAKRA connector.

[0013] Preferably, the DAB band-stop filter includes a sixth capacitor, a second inductor, a third inductor, and an eleventh capacitor, wherein the second terminal of the sixth capacitor is grounded, the first terminal of the sixth capacitor is electrically connected to the second terminal of the second inductor, the first terminal of the second inductor is electrically connected to the first terminal of the third inductor and the second terminal of the eleventh capacitor, and the second terminal of the second inductor, the second terminal of the third inductor, and the first terminal of the eleventh capacitor are electrically connected to the second input terminal of the receiving port through a capacitor.

[0014] Preferably, the FM band-stop filter includes a 24th capacitor, a 12th inductor, a 10th inductor, and a 19th capacitor. The first terminal of the 24th capacitor is grounded, the second terminal of the 24th capacitor is electrically connected to the first terminal of the 12th inductor, the second terminal of the 12th inductor is electrically connected to the first terminal of the 10th inductor and the second terminal of the 19th capacitor, and the second terminal of the 10th inductor and the first terminal of the 19th capacitor are electrically connected to the first input terminal of the receiving port through a capacitor.

[0015] This utility model also provides an electronic device, which includes a device body and an FM+DAB signal amplification circuit as described in any of the above.

[0016] In summary, the FM+DAB signal amplification circuit includes a receiving port, an amplifier circuit, a power divider circuit, an LC band rejection filter circuit and an output module, the receiving port is electrically connected with the input end of the amplifier circuit, the output end of the amplifier circuit is connected with the input end of the power divider circuit, the output end of the power divider circuit is connected with the input end of the LC band rejection filter circuit, the output end of the LC band rejection filter circuit is connected with the output module, and the receiving port is configured to receive DAB / FM signals. The amplification circuit uses LCR to build a power dividing circuit and uses an LC filter circuit, and solves the signal amplification requirements of two frequency bands through one amplification circuit. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a circuit structure diagram of an FM+DAB signal amplification circuit provided by the first aspect of the utility model;

[0018] Fig. 2 is a circuit structure diagram of an FM+DAB signal amplification circuit provided by the second aspect of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] The specific embodiments of the utility model will be described in detail below in combination with the drawings.

[0021] Please refer to Figs. 1-2The utility model discloses a first embodiment discloses a kind of FM+DAB signal amplification circuit, it includes: receiving port, amplifier circuit 1, power divider circuit 2, LC band elimination filter circuit 3, and output module, wherein, the receiving port is electrically connected with the input of the amplifier circuit 1, the output of the amplifier circuit 1 is electrically connected with the input of the power divider circuit 2, the output of the power divider circuit 2 is electrically connected with the input of the LC band elimination filter circuit 3, the output of the LC band elimination filter circuit 3 is electrically connected with the output module, the receiving port is configured to receive DAB / FM signal;

[0022] The power divider circuit 2 is configured to divide the received DAB / FM signal into two DAB / FM signals.

[0023] The LC band elimination filter circuit 3 is composed of a DAB band elimination filter and an FM band elimination filter. The DAB band elimination filter is configured to filter the DAB signal in one DAB / FM signal and output the FM signal. The FM band elimination filter is configured to filter the FM signal in the other DAB / FM signal and output the DAB signal.

[0024] Preferably, the receiving port is an antenna.

[0025] In this embodiment, the DAB / FM signal is received via the antenna and input into the amplifier. The DAB / FM signal is amplified by the amplifier circuit 1. The amplified DAB / FM signal is divided into two signals by the power divider circuit 2.

[0026] Preferably, it further includes a dual-channel DC power supply isolation module. The second end of the dual-channel DC power supply isolation module is electrically connected with a +12V power supply. The first end of the dual-channel DC power supply isolation module is electrically connected with the first end of the output module.

[0027] Preferably, the output module adopts a FAKRA connector.

[0028] In this embodiment, the DAB signal and the FM signal processed by the LC band elimination filter circuit 3 are output by the output module J1. The two ports of the FAKRA connector transmit the DAB signal and the FM signal to the DAB receiver and the FM receiver, respectively.

[0029] Preferably, the DAB band elimination filter comprises a sixth capacitor, a second inductor, a third inductor and an eleventh capacitor, wherein a second end of the sixth capacitor is grounded, a first end of the sixth capacitor is electrically connected with a second end of the second inductor, a first end of the second inductor is electrically connected with a first end of the third inductor and a second end of the eleventh capacitor, and a second end of the second inductor is electrically connected with a second end of the third inductor and a first end of the eleventh capacitor through a capacitor with a second input end of the receiving port.

[0030] Preferably, the FM band elimination filter comprises a twenty-fourth capacitor, a twelfth inductor, a tenth inductor and a nineteenth capacitor, wherein a first end of the twenty-fourth capacitor is grounded, a second end of the twenty-fourth capacitor is electrically connected with a first end of the twelfth inductor, a second end of the twelfth inductor is electrically connected with a first end of the tenth inductor and a second end of the nineteenth capacitor, and a second end of the tenth inductor and a first end of the nineteenth capacitor are electrically connected with a first input end of the receiving port through a capacitor.

[0031] In the embodiment, the DAB / FM signal is outputted as FM signal only through the DAB band elimination filter, and the DAB / FM signal is outputted as DAB signal only through the FM band elimination filter.

[0032] Specifically, in the embodiment, the FM+DAB signal amplification circuit is composed of an amplifier main body, an LCR power splitter and an LC filter circuit. The antenna signal is amplified by the amplifier main body, split into two paths by the power splitter, and then outputted to the receiver as DAB and FM signals through the LC band elimination filter 3. The band elimination filter functions to suppress the FM signal in the DAB frequency band and suppress the DAB signal in the FM frequency band, thereby preventing signal crosstalk of DAB and FM.

[0033] In summary, the key point of the FM+DAB signal amplification circuit lies in that only one amplifier circuit is used to solve the amplification requirement of two frequency bands. Compared with the traditional amplifier which uses two amplifier circuits to amplify FM and DAB signals respectively, the FM+DAB signal amplification circuit can effectively reduce the design cost. In short, the FM+DAB signal amplification circuit uses LCR to build a power splitting circuit and uses LC filter circuit to achieve the requirement of one amplifier circuit to solve the signal amplification requirement of two frequency bands.

[0034] The second embodiment of the utility model provides an electronic device, it includes device ontology, and like any one described above one kind of FM+DAB signal amplification circuit.

[0035] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the present application belongs to the protection scope of the present application.

Claims

1. An FM+DAB signal amplification circuit, characterized by, The FM+DAB signal amplification circuit comprises a receiving port, an amplifier circuit, a power divider circuit, an LC band elimination filter circuit, and an output module, wherein the receiving port is electrically connected with an input end of the amplifier circuit, an output end of the amplifier circuit is electrically connected with an input end of the power divider circuit, an output end of the power divider circuit is electrically connected with an input end of the LC band elimination filter circuit, an output end of the LC band elimination filter circuit is electrically connected with the output module, and the receiving port is configured to receive a DAB / FM signal. The power divider circuit is configured to divide the received DAB / FM signal into two DAB / FM signals. The LC band elimination filter circuit comprises a DAB band elimination filter and an FM band elimination filter, the DAB band elimination filter is configured to filter a DAB signal in one DAB / FM signal and output an FM signal, and the FM band elimination filter is configured to filter an FM signal in the other DAB / FM signal and output a DAB signal. The receiving port is an antenna.

2. An FM + DAB signal amplification circuit according to claim 1, characterized in that, The FM+DAB signal amplification circuit further comprises a two-way DC power supply isolation module, a second end of the two-way DC power supply isolation module is electrically connected with a +12V power supply, and a first end of the two-way DC power supply isolation module is electrically connected with a first end of the output module.

3. The FM+DAB signal amplifying circuit according to claim 1, wherein The output module adopts a FAKRA connector.

4. The FM+DAB signal amplification circuit according to claim 1, wherein, The DAB band elimination filter comprises a sixth capacitor, a second inductor, a third inductor, and an eleventh capacitor, wherein a second end of the sixth capacitor is grounded, a first end of the sixth capacitor is electrically connected with a second end of the second inductor, a first end of the second inductor is electrically connected with a first end of the third inductor and a second end of the eleventh capacitor, and a second end of the second inductor is electrically connected with a second end of the third inductor and a first end of the eleventh capacitor through a capacitor and a second input end of the receiving port.

5. The FM+DAB signal amplification circuit according to claim 1, wherein, The FM band elimination filter comprises a twenty-fourth capacitor, a twelfth inductor, a tenth inductor, and a nineteenth capacitor, wherein a first end of the twenty-fourth capacitor is grounded, a second end of the twenty-fourth capacitor is electrically connected with a first end of the twelfth inductor, a second end of the twelfth inductor is electrically connected with a first end of the tenth inductor and a second end of the nineteenth capacitor, and a second end of the tenth inductor and a first end of the nineteenth capacitor are electrically connected with a first input end of the receiving port through a capacitor.

6. The FM+DAB signal amplification circuit according to claim 1, wherein, The FM+DAB signal amplification circuit comprises a device body and the FM+DAB signal amplification circuit according to any one of claims 1 to 6.

7. An electronic device, comprising: ​

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