FM radio assembly, electronic equipment and FM radio method
By utilizing the working state and non-working state of the LNA port in the FM radio component and simplifying the signal transmission path with branch points, the complex problem of FM signal processing loop in the prior art is solved, and circuit simplification and cost reduction are achieved.
Patent Information
- Application Number
- CN202411486155.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-02-07
AI Technical Summary
In the prior art, the FM signal processing loop is complex, which increases the complexity and cost of the circuit.
By introducing the operating and non-operating states of the LNA port in the FM radio component, and using branch points to transmit the signal of the FM antenna and headphone base to the FM processing module, the switching switch is cancelled, simplifying the circuit structure.
The processing of the FM signal received by the headphone line and the FM signal received by the FM antenna is realized, reducing circuit complexity and device cost.
Smart Images
Figure CN119401117A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic equipment, and in particular to an FM radio receiver component, an electronic equipment and an FM radio receiver method. Background Art
[0002] FM (frequency modulation) is a radio function that receives broadcast signals transmitted by different power stations by adjusting different frequency bands. FM function is widely provided on electronic devices. Electronic devices usually use headphone cables as antennas to achieve the frequency modulation function; however, when the headphone cables are not used, users also have the need to use the FM frequency modulation function, so FM antennas are also set in electronic devices to achieve the frequency modulation function. In the prior art, in order to avoid the loss of FM signals due to impedance, the FM antenna and the headphone cable (headphone socket) are connected to the FM processing module through a switching switch on the circuit board of the mobile terminal to achieve signal transmission and processing. The switching switch connects one of the FM antenna and the headphone socket to the FM processing module, while the other is disconnected from the FM processing module; however, the setting of the switching switch increases the complexity of the circuit on the one hand, and also increases the cost on the other hand. Summary of the invention
[0003] The main purpose of the present application is to provide an FM radio component, an electronic device and an FM radio method, aiming to solve the technical problem of complex FM signal processing circuits in the prior art.
[0004] In a first aspect, the present application proposes an FM radio component, comprising:
[0005] FM antenna;
[0006] a first feeder line, the first feeder line being connected to the FM antenna;
[0007] An LNA port, an input end of the LNA port being connected to the first feeder; the LNA port having a non-working state and a working state;
[0008] Headphone holder;
[0009] A second feeder, the second feeder is connected to the headphone socket; wherein the output end of the LNA port is connected to the second feeder and has a branch point;
[0010] An FM processing module is connected to the branch point and is used to process a first FM signal received from the FM antenna or a second FM signal received from the headphone socket; wherein when a headphone wire is inserted into the headphone socket, the LNA port is in the non-working state; and when a headphone wire is not inserted into the headphone socket, the LNA port is in the working state.
[0011] Optionally, the branch point is arranged on the LNA port or on a soldering pad of the headphone socket.
[0012] Optionally, the distance between the branch point and the LNA port is 2-3 mm; and / or the distance between the branch point and the soldering pad of the headphone socket is 2-3 mm.
[0013] Optionally, the branch point is located between the solder pads of the LNA port and the headphone socket, and the distance between the branch point and the LNA port and the headphone socket is 2-3 mm respectively; the sound receiving component also includes an output line, which connects the second feed line and the output end of the LNA port; wherein the intersection of the output line and the second feed line is the branch point.
[0014] Optionally, the distance between the first feed line and the branch point is 5-7 mm.
[0015] Optionally, the sound receiving component further includes a circuit board;
[0016] The first feeder and the second feeder are arranged on the same routing layer of the circuit board; or, the first feeder and the second feeder are arranged on different routing layers of the circuit board, and one of the first feeder and the second feeder passes through the routing layer of the other.
[0017] Optionally, the first feed line and the second feed line are arranged perpendicular to each other.
[0018] Optionally, the FM radio component further includes a third feeder, and the branch point is connected to the FM processing module via the third feeder.
[0019] In a second aspect, the present application further proposes an electronic device, comprising the FM radio component as described above.
[0020] In a third aspect, the present application further proposes an FM radio reception method, which is applied to the FM radio reception component as described above or to the electronic device as described above, and the radio reception method comprises:
[0021] In response to the FM radio request signal, determining whether an earphone cable is inserted into the earphone socket;
[0022] If yes, control the LNA port to be in a non-working state, and obtain the second FM signal;
[0023] processing the second FM signal;
[0024] If not, controlling the LNA port to be in a working state and acquiring the first FM signal;
[0025] The first FM signal is processed.
[0026] Technical advantages: The input end of the LNA port is connected to the FM antenna through a first feeder, and a second feeder is connected between the output end of the LNA port and the headphone socket, and there is a branch point between the two, which is connected to the FM processing module so that the FM processing module can obtain the first FM signal received from the FM antenna or the second FM signal received from the headphone socket; when the headphone cable is inserted into the headphone socket, the LNA port is in a non-working state to avoid the first FM signal interfering with the second FM signal, and the second FM signal is transmitted from the branch point to the FM processing module through the second feeder; and when the headphone cable is not inserted into the headphone socket, the second FM signal will not be received at this time, and the first FM signal is transmitted from the LNA port to the FM processing module through the branch point. Therefore, the present application can also realize the processing of the FM signal received by the headphone cable and the FM signal received by the FM antenna without the switching switch, reducing the complexity of the circuit and the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0028] Figure 1 A schematic diagram of the structure of an FM radio receiver provided in an embodiment of the present application;
[0029] Figure 2 Another structural schematic diagram of an FM radio receiver provided in an embodiment of the present application;
[0030] Figure 3 Another structural schematic diagram of an FM radio receiver provided in an embodiment of the present application;
[0031] Figure 4 A flowchart of an FM radio reception method provided in an embodiment of the present application;
[0032] Figure 5 A schematic diagram of the working principle of an FM radio receiver provided in an embodiment of the present application;
[0033] Figure 6 Another schematic diagram of the working principle of an FM radio receiver provided in an embodiment of the present application.
[0034] Reference numerals list
[0035] 100 FM radio components 106 FM Processing Module 101 FM Antenna 107 Output line 102 First feeder 108 The third feeder 103 LNA Port 109 Headphone cable 104 Headphone holder P Branching Point 105 Second feeder DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0037] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0038] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0040] like Figure 1 As shown, the embodiment of the present application provides an FM radio component 100, including:
[0041] FM Antenna 101;
[0042] A first feeder 102, wherein the first feeder 102 is connected to the FM antenna 101;
[0043] An LNA port 103, an input end of which is connected to the first feeder 102; the LNA port 103 has a non-working state and a working state;
[0044] Headphone holder 104;
[0045] A second feeder 105, wherein the second feeder 105 is connected to the earphone socket 104; wherein the output end of the LNA port 103 is connected to the second feeder 105 and has a branch point P;
[0046] an FM processing module 106, the FM processing module 106 being connected to the branch point P and configured to process a first FM signal received from the FM antenna 101 or a second FM signal received from the earphone socket 104,
[0047] When the earphone cable 109 is inserted into the earphone socket 104 , the LNA port 103 is in the non-working state; when the earphone cable 109 is not inserted into the earphone socket 104 , the LNA port 103 is in the working state.
[0048] In the technical solution of the embodiment of the present application, the input end of the LNA port 103 is connected to the FM antenna 101 through the first feeder 102, and the second feeder 105 is connected between the output end of the LNA port 103 and the headphone socket 104, and there is a branch point P between the two, and the branch point P is connected to the FM processing module 106, so that the FM processing module 106 can obtain the first FM signal received from the FM antenna 101 or the second FM signal received from the headphone socket 104; when the headphone cable 109 is inserted into the headphone socket 104, the LNA port 103 is in a non-working state to avoid interference of the first FM signal with the second FM signal, and the second FM signal is transmitted from the branch point P to the FM processing module 106 through the second feeder 105; and when the headphone cable 109 is not inserted into the headphone socket 104, the second FM signal will not be received at this time, and the first FM signal is transmitted from the LNA port 103 to the FM processing module 106 through the branch point P. Therefore, the present application can also process the FM signal received by the headphone line 109 and the FM signal received by the FM antenna 101 without the switching switch, thereby reducing the complexity of the circuit and the cost of the device.
[0049] It should be noted that the LNA port 103 (Low Noise Amplifier) is a low noise amplifier, which is a device between the FM antenna 101 and the FM processing module 106, and is used to gain the first FM signal. In the above embodiment, the FM processing module 106 is used to process the received first FM signal or the second FM signal, and can be a commercially available product.
[0050] Compared with the prior art, the present application realizes the separate transmission of signals through the working state and the non-working state of the LNA port 103, rather than through the state of the switch. The branch point P divides the feed path of the signal transmission into two paths, and it is also connected to the FM processing module 106; wherein the branch point P is connected to the LNA port 103 and the headphone socket 104; the LNA port 103 and the headphone socket 104 are connected by a wire (the second feed line 105 is at least part of the wire), while in the prior art, a switch is also provided between the LNA port 103 and the headphone socket 104.
[0051] As an optional implementation of the above embodiment, Figure 2 or Figure 3 As shown, the branch point P is provided on the LNA port 103 or on the pad (not shown) of the headphone socket 104. That is, in an embodiment, the FM processing module 106 can be directly connected to the LNA port 103 or the pad of the headphone socket 104. In an embodiment, when the branch point P is provided on the LNA port 103, the second feed line 105 extends from the pad to the branch point P to facilitate the transmission of the second FM signal. In an embodiment, when the branch point P is provided on the pad, the second feed line 105 extends from the LNA port 103 to the pad to facilitate the transmission of the first FM signal.
[0052] As an optional implementation of the above embodiment, the spacing L2 between the branch point P and the LNA port 103 is 2-3mm; and / or the spacing L3 between the branch point P and the soldering pad of the headphone socket 104 is 2-3mm. When either the FM antenna 101 or the headphone cable 109 is used, the feeder end of the other branch can be very short and does not affect the impedance. When the FM antenna 101 is used, the headphone cable 109 is not inserted at this time, and the redundant part on the second feeder 105 is from the branch point P to the headphone soldering pad, as well as the metal line inside the headphone socket 104. The impedance of the FM signal on the feeder line is not greatly affected, and the signal can be transmitted normally from the FM antenna 101 to the FM processing module 106.
[0053] When the headphone cable 109 is used, the headphone cable 109 is inserted into the headphone socket 104, the LNA port 103 does not work, and the excess part of the feeder line is from the branch point P to the LNA port 103. The impedance of the feeder line has little effect on the FM signal, and the signal can be transmitted normally from the headphone cable 109 to the FM processing module 106.
[0054] In the embodiment, the distance L2 between the branch point P and the LNA port 103 is 2-3 mm, which can be understood as the wiring distance from the branch point P to the LNA port 103. The distance L3 between the branch point P and the pad of the earphone socket 104 is 2-3 mm, which can be understood as the wiring distance from the branch point P to the LNA port 103.
[0055] In an embodiment, the distance L2 between the branch point P and the LNA port 103 is 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm or 3 mm; and / or the distance L3 between the branch point P and the soldering pad of the headphone socket 104 is 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm or 3 mm.
[0056] As an optional implementation of the above embodiment, the branch point P is located between the LNA port 103 and the pad of the headphone socket 104, and the spacing between the LNA port 103 and the headphone socket 104 is 2-3 mm; the radio assembly also includes an output line 107, and the output line 107 connects the second feeder 105 and the output end of the LNA port 103; wherein the intersection of the output line 107 and the second feeder 105 is the branch point P. In the embodiment, when the FM antenna 101 is used, the headphone line 109 is not inserted at this time, and the output line 107 directly transmits the first FM signal to the FM processing module 106 through the branch point P, and the second feeder 105 from the branch point P to the headphone pad and the internal metal line of the headphone socket 104 has little effect on the impedance of the FM signal, and the signal can be normally transmitted from the FM antenna 101 to the FM processing module 106.
[0057] In the embodiment, when the headphone cable 109 is used, the headphone cable 109 is inserted, and the second FM signal is transmitted from the second feeder line 105 and the branch point P to the FM processing module 106; and the output line 107 is connected to the LNA port 103 through the branch point P. The impedance of the second feeder line 105 has little effect on the FM signal, and the signal can be transmitted normally from the FM antenna 101 to the FM processing module 106.
[0058] That is, in the embodiment, the branch point P is located between the pads of the LNA port 103 and the earphone socket 104 , and the LNA port 103 and the earphone socket 104 are close to each other.
[0059] As an optional implementation of the above embodiment, the distance L1 between the first feeder 102 and the branch point P is 5-7 mm. In an embodiment, the distance between the first feeder 102 and the branch point P is set to 5-7 mm, which can reduce the adverse effect on impedance. In an embodiment, the distance between the first feeder 102 and the branch point P is 5, 5.5, 6, 6.5 or 7 mm.
[0060] As an optional implementation of the above embodiment, the sound receiving assembly further includes a circuit board (not shown). In the embodiment, the circuit board is provided with an LNA port 103, an FM processing module 106 and an earphone socket 104 (and its pads).
[0061] In an embodiment, the first feeder 102 and the second feeder 105 are arranged on the same routing layer of the circuit board. In this embodiment, the distance L1 between the first feeder 102 and the branch point P is 5-7 mm.
[0062] In an embodiment, the first feeder 102 and the second feeder 105 are arranged on different routing layers of the circuit board, and one of the first feeder 102 and the second feeder 105 is passed through the routing layer of the other. Setting the two feeders on different routing layers can reduce mutual interference of signals between the two feeders.
[0063] As an optional implementation of the above embodiment, the first feeder 102 and the second feeder 105 are arranged perpendicular to each other. In some embodiments, the distance L1 between the first feeder 102 and the branch point P is 5-7 mm; and / or the first feeder 102 and the second feeder 105 are arranged on the same routing layer of the circuit board.
[0064] As an optional implementation of the above embodiment, the FM radio component 100 further includes a third feeder 108, and the branch point P is connected to the FM processing module 106 via the third feeder 108. In the embodiment, after the first FM signal or the second FM signal passes through the branch point P, it is transmitted to the FM processing module 106 via the third feeder 108 for processing.
[0065] In the embodiment, the third feeder line 108 is an impedance line, which can be arranged to be in the same line layer as the branch point P; the third feeder line 108 is a single feeder line without branches.
[0066] In the above embodiments, other components are provided between the FM antenna 101 and the LNA port 103 for performing preliminary processing on the first FM signal, such as de-noising, etc. These components are configured according to the quality of the required signal and will not be described in detail here.
[0067] The present application also provides an electronic device, including an FM radio component 100. The FM radio component 100 adopts the technical solutions of part or all of the above embodiments, and thus has the advantages of part or all of the above embodiments, which will not be described in detail here. In the embodiment, the electronic device can be an electronic product such as a mobile phone, IPAD, etc.
[0068] In the embodiment, the FM antenna 101 is built into the housing of the mobile phone and can be set to be invisible from the outside; or the metal housing of the electronic device can be reused as the FM antenna 101.
[0069] like Figure 4 As shown, the present application proposes an FM radio method, using the FM radio component 100 described in the above embodiment or the above electronic device, the radio method includes:
[0070] S100, in response to the FM radio request signal, determining whether the headphone cable 109 is inserted into the headphone socket 104;
[0071] S200, if yes, control the LNA port 103 to be in a non-working state, and obtain the second FM signal;
[0072] S300, processing the second FM signal;
[0073] S400, if not, control the LNA port 103 to be in working state, and obtain the first FM signal;
[0074] S500: Process the first FM signal.
[0075] In some embodiments, the FM radio request signal may be automatically sent after the FM APP or applet is opened; at this time, it is determined whether the earphone cable 109 is inserted into the earphone socket 104. Figure 5 As shown, if it is inserted, the LNA port 103 is in a non-working state. At this time, the first signal of the built-in FM antenna 101 cannot be transmitted from the LNA, and the signal received by the FM antenna 101 cannot be transmitted to the FM processing module 106. The FM signal received by the headphone line 109 antenna can be transmitted to the FM processing module 106.
[0076] like Figure 6 As shown, when it is detected that there is no headphone cable 109 inserted, the LNA port 103 is in working state, and the signal received by the built-in FM antenna 101 is transmitted to the FM processing module 106 for demodulation through the LNA port 103. Because there is no headphone cable 109 inserted into the headphone socket 104, there will be no FM signal received by the headphone cable 109 to interfere.
[0077] In some cases, during the process of receiving sound, specifically, during the operation of the FM APP or the mini-program, if the status of whether the earphone is inserted changes, the process returns to the previous level for determination, and determines whether the LNA is working according to whether the earphone is inserted. For example, if the earphone cable 109 is inserted and the earphone cable 109 is pulled out of the earphone socket 104, the process re-enters step S100, and then proceeds to steps S400 and S500; if the earphone cable 109 is not inserted and the earphone cable 109 is placed in the earphone socket 104, the process re-enters step S100, and then proceeds to steps S200 and S300.
[0078] The above description is only an optional embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the application concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.
Claims
1. An FM radio receiver, characterized in that: include: FM antenna; a first feeder line, the first feeder line being connected to the FM antenna; An LNA port, an input end of the LNA port being connected to the first feeder; The LNA port has a non-working state and a working state; Headphone holder; A second feeder, the second feeder is connected to the headphone socket; wherein the output end of the LNA port is connected to the second feeder and has a branch point; an FM processing module, the FM processing module being connected to the branch point and configured to process a first FM signal received from the FM antenna or a second FM signal received from the earphone socket; Wherein, when an earphone cable is inserted into the earphone socket, the LNA port is in the non-working state; when an earphone cable is not inserted into the earphone socket, the LNA port is in the working state.
2. The FM radio receiver assembly according to claim 1, wherein: The branch point is arranged on the LNA port or on a soldering pad of the earphone socket.
3. The FM radio receiver assembly according to claim 1, wherein: The distance between the branch point and the LNA port is 2-3 mm; and / or the distance between the branch point and the soldering pad of the earphone socket is 2-3 mm.
4. The FM radio receiver assembly according to claim 3, wherein: The branch point is located between the solder pads of the LNA port and the headphone socket, and the distance between the branch point and the LNA port and the headphone socket is 2-3 mm respectively; the sound receiving component also includes an output line, which connects the second feed line and the output end of the LNA port; wherein the intersection of the output line and the second feed line is the branch point.
5. The FM radio receiver assembly according to any one of claims 1 to 4, characterized in that: The distance between the first feed line and the branch point is 5-7 mm.
6. The FM radio receiver assembly according to any one of claims 1 to 4, characterized in that: The radio receiver assembly also includes a circuit board; The first feeder and the second feeder are arranged on the same routing layer of the circuit board; or, the first feeder and the second feeder are arranged on different routing layers of the circuit board, and one of the first feeder and the second feeder passes through the routing layer of the other.
7. The FM radio receiver assembly according to any one of claims 1 to 4, characterized in that: The first feed line and the second feed line are arranged perpendicular to each other.
8. The FM radio receiver assembly according to any one of claims 1 to 4, characterized in that: The FM radio component further includes a third feeder, and the branch point is connected to the FM processing module via the third feeder.
9. An electronic device, characterized in that: The invention comprises the FM radio receiver assembly according to any one of claims 1 to 8.
10. An FM radio reception method, characterized in that: The FM radio receiver assembly according to any one of claims 1 to 8 or the electronic device according to claim 9, wherein the radio receiver method comprises: In response to the FM radio request signal, determining whether an earphone cable is inserted into the earphone socket; If yes, control the LNA port to be in a non-working state, and obtain the second FM signal; processing the second FM signal; If not, controlling the LNA port to be in working state and acquiring the first FM signal; The first FM signal is processed.