Radio circuit with isolation function and electronic equipment

Abstract

The invention relates to the technical field of radio equipment, and discloses a radio circuit with an isolation function and electronic equipment. The radio circuit comprises an audio receiving circuit and a radio integrated circuit, the audio receiving circuit is provided with at least two different types of signal receiving circuits, one circuit comprises a first antenna structure for receiving a first type of signals and a first inductor, a first capacitor, an amplifying element and a second capacitor which are connected in sequence, and the second capacitor is connected with a signal processing chip; one end of the second antenna structure is grounded through the switchable connecting element, and the other end of the second antenna structure is connected with the second capacitor. The radio integrated circuit comprises a signal processing chip, and each signal receiving line is connected with the chip together. When one signal receiving line inputs the first type of signals, the connecting element can be switched to disconnect the other line, so that interference of different types of signals is effectively prevented, and the audio playing quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of radio equipment, and in particular to a radio circuit and electronic equipment with isolation function. Background Art

[0002] With the continuous development of electronic technology, the functions of electronic devices are becoming increasingly diversified. In the field of radio, traditional radio circuits can usually only receive a single type of signal, or are prone to mutual interference when receiving different types of signals, affecting the listening effect. This not only reduces the performance of the radio, but also fails to meet the user's demand for high-quality radio effects. Therefore, it is necessary to improve the existing technology.

[0003] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0004] The present invention provides a radio receiving circuit and electronic equipment with isolation function to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A radio circuit with isolation function, comprising an audio receiving circuit and a radio integrated circuit, wherein the audio receiving circuit comprises at least two different types of signal receiving circuits, each of which corresponds to a different type of signal source; the radio integrated circuit comprises a signal processing chip, and each of the signal receiving circuits is connected to the same signal processing chip;

[0007] One of the signal receiving circuits includes: a first antenna structure for receiving a first type of signal, and a first inductor element, a first capacitor element, an amplifier element, and a second capacitor element connected to the first antenna structure in sequence, wherein the second capacitor element is connected to the signal processing chip;

[0008] Another signal receiving circuit includes: a second antenna structure for receiving a second type of signal, one end of the second antenna structure is grounded through a switchable connection element, and the other end of the second antenna structure is connected to a common terminal of the second capacitor element and the signal processing chip;

[0009] When a first type of signal is input, the switchable connection element is disconnected to prevent interference with a second type of signal received by the second antenna structure.

[0010] Optionally, the first antenna structure is a telescopic antenna, the telescopic antenna is used to receive SW signals, and the first inductor element is used to optimize SW signal transmission;

[0011] The amplifying element is a triode.

[0012] Optionally, the second antenna structure is an AM magnetic rod, and the AM magnetic rod is used to receive AM signals;

[0013] The switchable connection element is a disconnector.

[0014] Optionally, the signal processing chip is a radio chip.

[0015] Optionally, the radio circuit with isolation function further includes a main control circuit, and the main control circuit is used to control the state switching of the switchable connection element according to the input state of the first type signal.

[0016] Optionally, the main control circuit is also connected to a radio switch, and the radio switch is used to control the on and off of the radio function.

[0017] Optionally, an electronic device comprises a radio circuit with isolation function as described in any one of the above items.

[0018] Optionally, the electronic device further includes a Bluetooth circuit, which is used to achieve wireless connection with an external device via Bluetooth to transmit and receive audio data, and the Bluetooth circuit includes a Bluetooth switch for controlling the Bluetooth function to be turned on and off.

[0019] Optionally, the electronic device further includes a charging management circuit, a battery protection circuit and a boost circuit connected in sequence, and the boost circuit is connected to the main control circuit.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a radio circuit and electronic device with an isolation function, which are provided with at least two signal receiving circuits of different types, and when a first type of signal is input to one of the signal receiving circuits, a switchable connection element is used to disconnect the other signal receiving circuit, thereby effectively preventing interference between different types of signals and improving the audio playback quality.

[0022] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A radio circuit with an isolation function is provided in the first embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A partial enlarged view of the .

[0026] Figure numerals: 11, audio receiving circuit; 12, radio integrated circuit; 13, radio switch; 14, main control circuit; 15, Bluetooth switch; 16, boost circuit; 17, battery protection circuit; 18, speaker amplification circuit; 19, charging management circuit. DETAILED DESCRIPTION

[0027] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0028] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0029] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0030] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0031] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0032] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0033] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0034] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0035] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] Embodiment 1

[0037] Please refer to Figure 1 and Figure 2 The radio circuit with isolation function provided in the embodiment of the present invention includes an audio receiving circuit 11 and a radio integrated circuit 12.

[0038] Among them, the audio receiving circuit 11 is provided with at least two different types of signal receiving circuits, which can simultaneously receive at least two different types of signal sources. Such a design can meet the user's needs for receiving different signals in different scenarios, such as short wave (SW) signals, medium wave (AM) signals, long wave (LW) signals, etc. The design of multiple signal receiving circuits enables the radio to adapt to different types of signal sources and meet the needs of users in different scenarios. Users can choose to receive different types of signals according to their preferences and actual conditions. For example, SW signals can receive international broadcasts from a long distance, and AM signals can receive local medium wave broadcasts. This flexibility makes the application range of the radio wider. Whether in cities or remote areas, users can obtain rich broadcast content by selecting appropriate signal sources.

[0039] Specifically, the radio integrated circuit 12 includes a type processing chip, and each of the signal receiving circuits is connected to the same signal processing chip. The signal processing chip is the core part of the entire radio circuit with isolation function. It is responsible for processing and demodulating signals from different signal receiving circuits. For the first type of signal and the second type of signal after amplification, filtering, etc., the signal processing chip can perform corresponding demodulation, amplification, noise reduction, etc. according to the type and characteristics of the signal, and finally output the processed audio signal to the speaker or other audio output device.

[0040] Furthermore, the signal transmission path of the audio receiving circuit 11 is as follows:

[0041] One of the signal receiving circuits includes: a first antenna structure for receiving a first type of signal, and a first inductor element, a first capacitor element, an amplifier element and a second capacitor element connected to the first antenna structure in sequence, and the second capacitor element is connected to the signal processing chip.

[0042] Among them, the first inductor element plays a role in optimizing signal transmission in the signal transmission path. By adjusting the inductance value, the impedance matching of the signal of a specific frequency is performed, so that the signal can be transmitted more effectively in the circuit and reduce the reflection and loss of the signal. The first capacitor element mainly plays the role of coupling and filtering, and is used to filter out unnecessary frequency components to ensure that only the first type of signal within a specific frequency range can pass smoothly and be transmitted to the amplifier element. The amplifier element amplifies the first type of signal to increase the strength of the signal.

[0043] Another signal receiving circuit includes: a second antenna structure for receiving a second type of signal, one end of the second antenna structure is grounded through a switchable connection element, and the other end of the second antenna structure is connected to the common terminal of the second capacitor element and the signal processing chip.

[0044] When a first type of signal is input, the switchable connection element is disconnected to prevent interference with a second type of signal received by the second antenna structure.

[0045] Among them, the arrangement of inductive elements, capacitive elements and amplifying elements in the signal transmission path can optimize, filter and amplify the received signals, improve the strength and purity of the signals, help improve the sensitivity and selectivity of the radio, and enable the radio to better receive weak signals and accurately select the desired signals from a large number of signals.

[0046] In this embodiment, the switchable connection element plays a key isolation role in the circuit. When the first type of signal is input, the switchable connection element is disconnected, and the connection between the second antenna structure and the ground is cut off, thereby preventing the first type of signal from interfering with the second type of signal received by the second antenna structure.

[0047] Specifically, in this embodiment, the first antenna structure is a telescopic antenna, the telescopic antenna is used to receive SW signals, the first inductor element is used to optimize SW signal transmission; and the amplifying element is a triode.

[0048] The second antenna structure is an AM magnetic rod, and the AM magnetic rod is used to receive AM signals; the switchable connection element is an isolation switch, and the signal processing chip is a radio chip.

[0049] Please refer to Figure 1 , Figure 2 The SW signal is transmitted from the rod antenna to the transistor Q4 through the inductor and capacitor C74 for signal amplification, and then transmitted to the 8th pin of the integrated circuit U7 through the capacitor C66 for signal processing and amplification, and finally amplified to the speaker amplifier circuit 18 through the low-frequency integrated circuit U2; at the same time, a magnetic bar for receiving AM signals is provided, and the AM magnetic bar receives external radio signals and is connected to the 8th pin of the integrated circuit U7 through the capacitor C67, and the capacitor C67 is connected to the output end of the capacitor C66; the external radio signal is amplified and output by the low-frequency integrated circuit U2.

[0050] In addition, the radio circuit further includes a main control circuit 14, which is used to control the state switching of the switchable connection element according to the input state of the first type signal.

[0051] When the SW signal is input, if the switchable connecting element is not disconnected, the SW signal may be coupled to the second antenna structure through various pathways, interfering with the AM magnetic bar's reception of the AM signal. In this embodiment, by disconnecting the switchable connecting element, the transmission paths of the two different types of signals can be effectively isolated, thereby improving the quality of signal reception.

[0052] In this embodiment, the radio circuit also includes a main control circuit 14, which is used to control the state switching of the switchable connection element according to the input state of the first type of signal; the main control circuit 14 is also connected to a radio switch 13, and the radio switch 13 is used to control the opening and closing of the radio function.

[0053] Through the design of the switchable connection element, when the first type of signal is input, the connection between the second antenna structure and the ground can be effectively disconnected to prevent the first type of signal from interfering with the second type of signal. This greatly improves the anti-interference ability of the radio when receiving different types of signals, allowing users to clearly listen to different types of broadcast programs without being interfered by other signals.

[0054] For example, when receiving an AM signal, if a SW signal is input at the same time, disconnection of the switchable connection element can ensure that the AM magnetic bar can focus on receiving the AM signal without being affected by the SW signal, thereby improving the reception quality of the AM signal.

[0055] In summary, the radio circuit with isolation function provided in this embodiment can provide good signal isolation and optimized signal processing, reduce interference and noise between signals, and is conducive to improving the user's radio experience.

[0056] At the same time, the automatic control function of the switchable connection elements enables the radio to automatically adjust the circuit according to different signal input states without the need for manual intervention by the user, thereby improving the convenience and intelligence of the radio.

[0057] Embodiment 2

[0058] Please continue to refer to Figure 1 and Figure 2 Based on the aforementioned embodiment, this embodiment provides an electronic device, including the aforementioned radio circuit, a speaker amplifier circuit 18 connected to the radio circuit with isolation function, and also including a Bluetooth circuit, a charging management circuit 19, a battery protection circuit 17 and a boost circuit 16.

[0059] The main control circuit 14 is used to control the state switching of the switchable connection element according to the input state of the first type of signal. When the SW signal input is detected, the main control circuit 14 sends a control signal to disconnect the isolation switch to achieve signal isolation. When there is no SW signal input, the main control circuit 14 can control the isolation switch to close as needed so that the AM magnetic bar can normally receive the AM signal.

[0060] The speaker amplifier circuit 18 is used to receive the audio signals processed by the sound receiving circuit. Usually, the power of these signals is relatively small and is not enough to directly drive the speaker to produce a sufficiently loud sound. The speaker amplifier circuit 18 amplifies the power of these weak audio signals so that they can drive the speaker to work. Through the transistors, integrated operational amplifiers and other electronic components in the amplifier circuit, the voltage and current of the input audio signal are amplified to increase the power level of the signal.

[0061] The Bluetooth circuit is used to achieve wireless connection with external devices via Bluetooth to transmit and receive audio data. The Bluetooth switch 15 is used to control the opening and closing of the Bluetooth function. Users can connect to external devices such as mobile phones and tablets via Bluetooth to play music or other audio content. The Bluetooth circuit is independent of the radio circuit with isolation function, but can be interactively controlled by the main control circuit 14. For example, when the radio is playing, the user can pause the Bluetooth audio playback by operating the Bluetooth switch 15; or in the Bluetooth connection state, the user can switch to the radio playback mode to listen to the radio program.

[0062] The charging management circuit 19 is used to manage the charging of the battery of the electronic device to ensure that the battery is charged safely and efficiently. The battery protection circuit 17 is used to protect the battery from overcharge, overdischarge, overcurrent, etc. to extend the battery life. The boost circuit 16 increases the voltage output by the battery to a voltage value suitable for the main control circuit 14 and other circuits to ensure the normal operation of the electronic device.

[0063] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A radio circuit with isolation function, characterized in that: It includes an audio receiving circuit and a radio integrated circuit, wherein the audio receiving circuit includes at least two different types of signal receiving circuits, each of which corresponds to a different type of signal source; the radio integrated circuit includes a signal processing chip, and each of the signal receiving circuits is connected to the same signal processing chip; One of the signal receiving circuits includes: a first antenna structure for receiving a first type of signal, and a first inductor element, a first capacitor element, an amplifier element, and a second capacitor element connected to the first antenna structure in sequence, wherein the second capacitor element is connected to the signal processing chip; Another signal receiving circuit includes: a second antenna structure for receiving a second type of signal, one end of the second antenna structure is grounded through a switchable connection element, and the other end of the second antenna structure is connected to a common terminal of the second capacitor element and the signal processing chip; When a first type of signal is input, the switchable connection element is disconnected to prevent interference with a second type of signal received by the second antenna structure.

2. The radio receiving circuit with isolation function according to claim 1, characterized in that: The first antenna structure is a telescopic antenna, the telescopic antenna is used to receive SW signals, and the first inductor element is used to optimize SW signal transmission; The amplifying element is a triode.

3. The radio receiving circuit with isolation function according to claim 1, characterized in that: The second antenna structure is an AM magnetic rod, and the AM magnetic rod is used to receive AM signals; The switchable connection element is a disconnector.

4. The radio receiving circuit with isolation function according to claim 1, characterized in that: The signal processing chip is a radio chip.

5. The radio receiving circuit with isolation function according to claim 1, characterized in that: It also includes a main control circuit, which is used to control the state switching of the switchable connection element according to the input state of the first type signal.

6. The radio receiving circuit with isolation function according to claim 5, characterized in that: The main control circuit is also connected to a radio switch, and the radio switch is used to control the opening and closing of the radio function.

7. An electronic device, characterized in that: It comprises the radio receiving circuit with isolation function as claimed in any one of claims 1 to 6.

8. The electronic device according to claim 7, characterized in that: It also includes a Bluetooth circuit, which is used to achieve wireless connection with external devices via Bluetooth to transmit and receive audio data. The Bluetooth circuit includes a Bluetooth switch for controlling the Bluetooth function to be turned on and off.

9. The electronic device according to claim 8, characterized in that: It also includes a charging management circuit, a battery protection circuit and a boost circuit connected in sequence, and the boost circuit is connected to the main control circuit.

10. The electronic device according to claim 8, characterized in that: It also includes a speaker amplifier circuit connected to the sound receiving circuit with isolation function.

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