Wireless U segment receiving circuit and microphone system
By integrating peripheral control functions into the receiver chip and communicating with the peripheral module, the problem of complex structure and difficulty in miniaturization of wireless UHF receiver circuits is solved, achieving circuit simplification and cost reduction, and expanding the application range.
Patent Information
- Application Number
- CN202521773175.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-20
AI Technical Summary
Existing wireless U-band receiver circuits are complex in structure and difficult to miniaturize, especially when it is necessary to integrate peripheral control and radio frequency signal reception functions.
By employing a receiver chip that integrates peripheral control and signal reception functions, combined with power supply circuits, wireless communication circuits, display circuits, button circuits, and signal output circuits, the control chip and related circuits are reduced through integrated design, thereby achieving circuit miniaturization.
It effectively reduces the complexity and number of components in the receiving circuit, lowers costs, and enables circuit miniaturization, thus expanding the range of applications.
Smart Images
Figure CN224684209U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of digital UHF wireless technology, and more specifically, to a wireless UHF receiving circuit and a microphone system. Background Technology
[0002] In the field of digital UHF wireless, receivers are sometimes required to function as handheld devices in specific scenarios. To meet this need, the UHF receiving circuitry within the receiver must be miniaturized, allowing for a more compact device design. However, in practical applications, the UHF receiving circuitry often requires the ability to receive radio frequency signals and communicate with peripherals to execute various peripheral-related commands. This necessitates the separate placement of peripheral-related control chips and radio frequency signal receiving chips within the receiving circuitry, making the overall system complex and hindering effective circuit miniaturization. Utility Model Content
[0003] This application provides a wireless UHF receiving circuit and a microphone system, which can solve the problems of complex structure and difficulty in miniaturization of existing wireless UHF receiving circuits.
[0004] To achieve this objective, the embodiments of this application provide the following solutions.
[0005] According to one aspect of the embodiments of this application, a wireless UHF receiving circuit is provided, including a receiving module and a peripheral module. The receiving module is provided with a receiving chip that integrates peripheral control functions and signal receiving functions. The receiving chip is connected to an antenna and the peripheral module to receive radio frequency signals and communicate with the peripheral module. The peripheral module includes at least one of a power supply circuit, a wireless communication circuit, a display circuit, a button circuit, and a signal output circuit.
[0006] In one possible implementation, the peripheral module includes a power supply circuit with a first power supply circuit and a second power supply circuit, the output terminals of the first power supply circuit and the second power supply circuit being connected to the receiving chip, wherein the voltages output by the first power supply circuit and the second power supply circuit are different.
[0007] In one possible implementation, the wireless U-band receiving circuit further includes a first interface, which is connected to the first power supply circuit, the second power supply circuit, and the receiving chip respectively. The first interface is used to provide power to the first power supply circuit and the second power supply circuit and to provide a data transmission port for the receiving chip. The first interface includes a USB interface.
[0008] In one possible implementation, the first power supply circuit includes a first voltage conversion chip, a 32nd capacitor, a 33rd capacitor, a fourth inductor, a 43rd capacitor, and a 42nd capacitor. The voltage input terminal and enable terminal of the first voltage conversion chip are connected to the first interface. The second terminals of the 32nd and 33rd capacitors are grounded. The first terminals of the 32nd and 33rd capacitors are connected to the voltage input terminal of the first voltage conversion chip. The first terminals of the 43rd and 42nd capacitors are connected to the second terminal of the fourth inductor and the receiving chip. The second terminals of the 43rd and 42nd capacitors are grounded. The first terminal of the fourth inductor is connected to the external power supply inductor terminal of the first voltage conversion chip.
[0009] In one possible implementation, the second power supply circuit includes a second voltage conversion chip, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirtieth capacitor, and a thirty-first capacitor. The first terminals of the twenty-eighth capacitor and the twenty-ninth capacitor are connected to the first interface and the voltage input terminal of the second voltage conversion chip, and the second terminals of the twenty-eighth capacitor and the twenty-ninth capacitor are grounded. The first voltage output terminal of the second voltage conversion chip is connected to the second voltage output terminal of the second voltage conversion chip, the first terminal of the thirtieth capacitor, the first terminal of the thirty-first capacitor, and the receiving chip. The second terminals of the thirtieth capacitor and the second terminal of the thirty-first capacitor are grounded.
[0010] In one possible implementation, the wireless communication circuit includes a first transistor, a twentieth resistor, and a first light-emitting diode (LED). The base of the first transistor is connected to the receiving chip, and the emitter is connected to the output terminal of the second power supply circuit. The collector of the first transistor is connected to the first end of the twentieth resistor, the second end of the twentieth resistor is connected to the anode of the first LED, and the cathode of the first LED is grounded.
[0011] In one possible implementation, the button circuit includes multiple sub-circuits with the same circuit structure. The sub-circuit includes a button resistor and a switch button. The first end of the button resistor is connected to the output end of the second power supply circuit. The first end of the button resistor is connected to the button signal receiving end of the receiving chip and the first end of the switch button. The second end of the switch button is grounded.
[0012] In one possible implementation, the signal output circuit includes a digital-to-analog converter circuit and an operational amplifier circuit. The input terminal of the digital-to-analog converter circuit is connected to the receiving chip, and the output terminal of the digital-to-analog converter circuit is connected to the operational amplifier circuit.
[0013] In one possible implementation, the operational amplifier circuit includes an operational amplifier, a sixteenth resistor, a fifteenth resistor, a fourteenth resistor, an eleventh resistor, and a thirty-sixth capacitor. The first end of the sixteenth resistor is connected to the output terminal of the second power supply circuit, the second end of the sixteenth resistor is connected to the positive power supply terminal of the operational amplifier and the second end of the fifteenth resistor, the first end of the fifteenth resistor is connected to the second end of the fourteenth resistor and the non-inverting input terminal of the operational amplifier, and the first end of the fourteenth resistor is grounded. The inverting input terminal of the operational amplifier is connected to the output terminal of the digital-to-analog converter circuit, the first terminal of the eleventh resistor, and the first terminal of the thirty-sixth capacitor. The second terminal of the eleventh resistor and the second terminal of the thirty-sixth capacitor are connected to the output terminal of the operational amplifier.
[0014] According to one aspect of the embodiments of this application, a microphone system is provided, including a receiver and a microphone, wherein the receiver is communicatively connected to the microphone, and the receiver includes the wireless UHF receiving circuit described above.
[0015] The beneficial effects of the technical solutions provided in this application are: The wireless UHF receiving circuit provided in this application includes a receiving module and a peripheral module. The receiving module has a receiving chip that integrates peripheral control functions and signal receiving functions. The receiving chip is connected to an antenna and the peripheral module to receive radio frequency signals and communicate with the peripheral module. The peripheral module includes at least one of a power supply circuit, a wireless communication circuit, a display circuit, a button circuit, and a signal output circuit. This application's embodiment utilizes a receiving chip with integrated peripheral control functions to communicate with the peripheral module, thereby avoiding the need for a control chip and related circuitry. This effectively reduces the complexity of the receiving circuit, the number of circuit components, and the circuit cost, and also effectively achieves circuit miniaturization, expanding the application range of the receiving circuit. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.
[0017] Figure 1 This is a structural diagram of the wireless U-band receiving circuit provided in an embodiment of this application; Figure 2 A circuit diagram of the receiving module in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 3 A circuit diagram of the first power supply circuit in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 4A circuit diagram of the second power supply circuit in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 5 A circuit diagram of the first interface in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 6 A circuit diagram of the display circuit in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 7 A circuit diagram of the button circuit in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 8 A circuit diagram of the wireless communication circuit in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 9 A circuit diagram of the digital-to-analog converter circuit in the wireless UHF receiver circuit provided in the embodiments of this application; Figure 10 A circuit diagram of the operational amplifier circuit in the wireless U-band receiving circuit provided in the embodiments of this application; Figure 11 This is a structural diagram of a microphone system provided in an embodiment of this application.
[0018] Label Explanation: U1, Receiver chip; X1, Crystal oscillator; C17, Seventeenth capacitor; C18, Eighteenth capacitor; C1, First capacitor; C4, Fourth capacitor; C5, Fifth capacitor; C6, Sixth capacitor; C7, Seventh capacitor; C3, Third capacitor; C2, Second capacitor; C9, Ninth capacitor; C12, Twelfth capacitor; C13, Thirteenth capacitor; C14, Fourteenth capacitor; C10, Tenth capacitor; C11, Eleventh capacitor; USB1, Connector; L6, Sixth inductor; L7, Seventh inductor; U4, First voltage conversion chip; C32, Thirty-second capacitor; C33, Thirty-third capacitor; L4, Fourth inductor; C43, Forty-third capacitor; C42, Forty-second capacitor; C35, Thirty-fifth capacitor; C34, Thirty-fourth capacitor; R10, Tenth resistor; R9, Ninth resistor; U3, Second voltage conversion chip; C28, Twenty-eighth capacitor; C 29. Capacitor C29; C30. Capacitor C30; Capacitor C31; Capacitor C31; Q1. Transistor Q1; R20. Resistor R20; D1. LED Q1; Resistor R21; Resistor R22; Resistor R22; Resistor R25; Resistor R24; Resistor R23; Resistor R19; Resistor U5; Operational Amplifier; Resistor R16; Resistor R15; Resistor R14; Resistor R11; Resistor R11; Capacitor C36; Capacitor C37; Capacitor C37; Capacitor C38; Capacitor C39; Capacitor C39; Capacitor C40; Capacitor C40; Resistor R12; Resistor R13; Resistor R14; Capacitor C41; Capacitor C41; Digital-to-Analog Converter Chip; Capacitor C23; Inductor L2; Capacitor C25; Capacitor C25. Detailed Implementation
[0019] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.
[0020] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the terms “comprising” and “including” as used in embodiments of this application mean that the corresponding feature can be implemented as the presented feature, information, data, step, operation, element, and / or component, but do not exclude implementation as other features, information, data, step, operation, element, component, and / or combinations thereof supported by the art. It should be understood that when we say that an element is “connected” or “coupled” to another element, the one element can be directly connected or coupled to the other element, or it can mean that the one element and the other element establish a connection relationship through an intermediate element. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein indicates at least one of the items defined by the term; for example, “A and / or B” indicates implementation as “A,” or implementation as “A,” or implementation as “A and B.”
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0022] The technical solutions of this utility model and their effects are described below through several exemplary embodiments. It should be noted that the following embodiments can be referenced, borrowed from, or combined with each other. Identical terms, similar features, and similar implementation steps in different embodiments will not be repeated.
[0023] The wireless U-band receiving circuit and microphone system provided in this application are intended to solve at least one technical problem existing in the prior art.
[0024] This application provides a wireless U-band receiving circuit, such as... Figures 1-10 As shown, the wireless U-band receiving circuit includes a receiving module and a peripheral module. The receiving module is equipped with a receiving chip U1 that integrates peripheral control functions and signal receiving functions. The receiving chip U1 is connected to the antenna and the peripheral module to receive radio frequency signals and communicate with the peripheral module. The peripheral module includes at least one of a power supply circuit, a wireless communication circuit, a display circuit, a button circuit, and a signal output circuit.
[0025] Optionally, the receiving chip U1 serves as the main receiver of the U-band wireless signal. It is used to receive U-band wireless information containing audio data and to control other peripherals and receive signals transmitted by the peripherals.
[0026] In one embodiment, the receiving chip U1 can be U1R23D, or it can be U1T32A, U1T32D, or other signal receiving chips U1 capable of controlling external circuits.
[0027] Optionally, the receiving module may further include a crystal oscillator X1, a seventeenth capacitor C17, and an eighteenth capacitor C18. The second terminal of the eighteenth capacitor C18 is grounded, and its first terminal is connected to the first terminal of the crystal oscillator X1 and the twenty-ninth pin of the receiving chip U1. The second terminal of the seventeenth capacitor C17 is grounded and connected to the second terminal of the crystal oscillator X1, and its first terminal is connected to the third terminal of the crystal oscillator X1 and the thirtieth pin of the receiving chip U1. The crystal oscillator X1, together with the inverting amplifier and load capacitor inside the receiving chip U1, forms a 'Pierce oscillation circuit'. The third terminal of the crystal oscillator X1 is connected to the input terminal of the amplifier inside the receiving chip U1, serving as the excitation signal input for the crystal oscillator X1. The first terminal of the crystal oscillator X1 is connected to the output terminal of the amplifier inside the receiving chip U1, serving as the feedback signal output for the crystal oscillator X1. These two pins form a closed-loop feedback system, enabling the crystal oscillator X1 to generate a stable oscillation signal.
[0028] In one embodiment, the receiving module may further include a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a third capacitor C3, and a second capacitor C2. One end of the first capacitor C1 is grounded, and the other end is connected to the first and second pins of the receiving chip U1. The receiving antenna is connected to the second end of the fifth capacitor C5 and the second end of the fourth capacitor C4, while the first ends of the fifth capacitor C5 and the third capacitor C3 are grounded. The second end of the third capacitor C3 is connected to the first ends of the second capacitor C2 and the fourth capacitor C4, and the second end of the second capacitor C2 is connected to the fifth pin of the receiving chip U1. Specifically, the first capacitor C1, the second capacitor C2, the sixth capacitor C6, and the seventh capacitor C7 are connected between the power supply pin of the receiving chip U1 and ground, serving as decoupling and filtering capacitors. The first capacitor C1 and the sixth capacitor C6 can be ceramic capacitors to handle high-frequency noise in the electrical signal, as high-frequency signals pass more easily through small capacitors, making the electrical signal entering the chip's power supply pin cleaner and reducing interference from high-frequency noise on the chip's operation. The seventh capacitor, C7, can be a large-capacity capacitor used to filter out low-frequency ripple and stabilize the power supply voltage. When there are low-frequency fluctuations in the power supply signal of the receiving chip U1, the large-capacity capacitor can maintain voltage stability through charging and discharging, ensuring that the receiving chip U1 operates under a stable power supply. The third capacitor, C3, the fourth capacitor, C4, and the fifth capacitor, C5, mainly perform filtering, impedance matching, and other processing on the RF signals received by the antenna, optimizing the RF signal reception effect and improving the performance of the chip's RF section.
[0029] Optionally, the receiving module may also include a ninth capacitor C9, a tenth capacitor C10, a twelfth capacitor C12, a thirteenth capacitor C13, and a fourteenth capacitor C14. These capacitors are also connected between different power input terminals of the receiving chip U1 and ground, similarly serving the functions of power filtering and decoupling. The ninth capacitor C9, the twelfth capacitor C12, and the thirteenth capacitor C13 can be small-capacity 0.1μF capacitors to filter out high-frequency noise, while the tenth capacitor C10 and the fourteenth capacitor C14 can be large-capacity capacitors to filter out low-frequency ripple, ensuring the quality of the power signal input to the receiving chip U1 and improving the stability and reliability of the chip's operation. The eleventh capacitor C11 can be a larger-capacity capacitor, capable of storing more charge. When the power signal experiences instantaneous voltage drops or other fluctuations, it releases the charge in a timely manner to maintain voltage stability and perform more effective smoothing of the power signal.
[0030] Optionally, the peripheral module includes a power supply circuit with a first power supply circuit and a second power supply circuit. The output terminals of the first power supply circuit and the second power supply circuit are connected to the receiving chip U1, wherein the output voltages of the first power supply circuit and the second power supply circuit are different.
[0031] In one embodiment, the first power supply circuit can provide a DC voltage of 1.25V, and the second power supply circuit can provide a DC voltage of 3.3V. The receiving module may further include a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, and a twelfth capacitor C12. The first terminals of the ninth capacitor C9 and the tenth capacitor C10 are grounded. The second terminal of the tenth capacitor C10 is connected to the output terminal of the first power supply circuit, and the second terminal of the ninth capacitor C9 is connected to the tenth pin (operating voltage pin) of the receiving chip U1. The second terminals of the eleventh capacitor C11 and the twelfth capacitor C12 are grounded. The first terminals of the eleventh capacitor C11 and the twelfth capacitor C12 are connected to the output terminal of the second power supply circuit and the twelfth pin (voltage input pin) of the receiving chip U1.
[0032] Optionally, the wireless U-band receiving circuit further includes a first interface, which is connected to the first power supply circuit, the second power supply circuit, and the receiving chip U1 respectively; the first interface is used to provide power to the first power supply circuit and the second power supply circuit and to provide a data transmission port for the receiving chip U1, and the first interface includes a USB interface.
[0033] Alternatively, the first interface can also be a Thunderbolt 4 interface, an HDMI interface, or other interfaces that can be used to transmit signals and power.
[0034] In one embodiment, the first interface can be a Type-C interface within a USB interface, which may include a connector USB1, a sixth inductor L6, and a seventh inductor L7. The positive data terminal of the connector USB1 is connected to the receiving chip U1 via the sixth inductor L6, and the negative data terminal is connected to the receiving chip U1 via the seventh inductor L7. The receiving chip U1 can perform firmware upgrades through this Type-C interface.
[0035] Optionally, the first power supply circuit includes a first voltage conversion chip U4, a thirty-second capacitor C32, a thirty-third capacitor C33, a fourth inductor L4, a forty-third capacitor C43, and a forty-second capacitor C42. The voltage input terminal and enable terminal of the first voltage conversion chip U4 are connected to the first interface. The second terminals of the thirty-second capacitor C32 and the thirty-third capacitor C33 are grounded. The first terminals of the thirty-second capacitor C32 and the thirty-third capacitor C33 are connected to the voltage input terminal of the first voltage conversion chip U4. The first terminals of the forty-third capacitor C43 and the forty-second capacitor C42 are connected to the second terminal of the fourth inductor L4 and the receiving chip U1. The second terminals of the forty-third capacitor C43 and the forty-second capacitor C42 are grounded. The first terminal of the fourth inductor L4 is connected to the external power supply inductor terminal of the first voltage conversion chip U4.
[0036] Among them, capacitor C32 (32nd capacitor) is an input filter capacitor, a large-capacity capacitor, whose main function is to filter out low-frequency ripple in the input signal, making the electrical signal input to the first voltage conversion chip U4 smoother and more stable. When there are low-frequency voltage fluctuations in the electrical signal, the large-capacity capacitor can stabilize the voltage through charging and discharging. Capacitor C33 (33rd capacitor) is a high-frequency bypass capacitor, a small-capacity capacitor, whose main function is to filter out high-frequency noise in the input electrical signal. Because high-frequency signals pass more easily through small capacitors, this makes the power supply entering the first voltage conversion chip U4 more pure, reducing the interference of high-frequency noise on the chip's operation. Capacitor C42 (42nd capacitor) is an output filter capacitor, a large-capacity capacitor, mainly used to filter out low-frequency ripple in the output voltage, making the voltage output to the load (receiving chip U1) more stable, meeting the load's requirements for power supply stability. Capacitor C43 (43rd capacitor) is an output high-frequency bypass capacitor, a small-capacity capacitor, whose main function is to filter out high-frequency noise in the output voltage, ensuring the purity of the output voltage, and reducing the impact of high-frequency noise on the operation of the load circuit. Inductor L4 (4th inductor) can be the energy storage inductor in the first power supply circuit. In the first power supply circuit, the first voltage conversion chip U4 controls the on and off of its internal switching transistor, causing current to flow intermittently through the inductor. When the switching transistor is on, the inductor stores energy; when the switching transistor is off, the inductor releases energy, maintaining the stability of the output voltage and smoothing the output current.
[0037] Optionally, the first power supply circuit may further include a thirty-fifth capacitor C35, a thirty-fourth capacitor C34, a tenth resistor R10, and a ninth resistor R9. The first terminal of the thirty-fifth capacitor C35 is grounded, and its second terminal is connected to the first terminal of the thirty-fourth capacitor C34, the second terminal of the ninth resistor R9, and the second terminal of the fourth inductor L4. The second terminal of the thirty-fourth capacitor C34 is connected to the feedback terminal of the first voltage conversion chip U4, the first terminal of the ninth resistor R9, and the second terminal of the tenth resistor R10. The first terminal of the tenth resistor R10 is grounded.
[0038] Optionally, the thirty-fourth capacitor C34 can be used for phase compensation to help stabilize the phase characteristics of the internal feedback loop of the first voltage conversion chip U4, prevent circuit oscillation, and ensure stable operation of the first power supply circuit. The thirty-fifth capacitor C35 can be a coupling capacitor, which isolates DC and allows AC signals to pass through, preventing mutual interference between DC signals in the preceding and following stages while allowing AC signals to pass smoothly. The ninth resistor R9 and the tenth resistor R10 form a feedback voltage divider circuit. The first voltage conversion chip U4 detects the output voltage through the feedback terminal (FB / VOUT). The ninth resistor R9 and the tenth resistor R10 divide the output voltage and feed it back to the first voltage conversion chip U4. The first voltage conversion chip U4 compares the feedback voltage with the internal reference voltage and adjusts the output accordingly to stabilize the output voltage. By changing the resistance values of these two resistors, the magnitude of the output voltage can be adjusted.
[0039] In one embodiment, the first interface can provide 5V DC power to the first power supply circuit, and the first voltage conversion chip U4 can be of model LP3201AB5F, which converts the 5V DC power to 1.25V DC power. Alternatively, the first voltage conversion chip U4 can be of model RT8060, AUR9713, or other types of step-down chips.
[0040] Optionally, the second power supply circuit includes a second voltage conversion chip U3, a twenty-eighth capacitor C28, a twenty-ninth capacitor C29, a thirtieth capacitor C30, and a thirty-first capacitor C31. The first terminal of the twenty-eighth capacitor C28 and the first terminal of the twenty-ninth capacitor C29 are connected to the first interface and the voltage input terminal of the second voltage conversion chip U3, and the second terminal of the twenty-eighth capacitor C28 and the second terminal of the twenty-ninth capacitor C29 are grounded. The first voltage output terminal of the second voltage conversion chip U3 is connected to the second voltage output terminal of the second voltage conversion chip U3, the first terminal of the thirtieth capacitor C30, the first terminal of the thirty-first capacitor C31, and the receiving chip U1, and the second terminals of the thirtieth capacitor C30 and the thirty-first capacitor C31 are grounded.
[0041] Optionally, the twenty-eighth capacitor, C28, is a large-capacity input filter capacitor, which can be an electrolytic capacitor or a tantalum capacitor. Its main function is to filter out low-frequency ripple in the input power supply and stabilize the input voltage. Since the power supply is subject to various interferences during transmission, generating low-frequency voltage fluctuations, the large-capacity capacitor can use its own charging and discharging characteristics to make the voltage input to the second voltage conversion chip U3 more stable. The twenty-ninth capacitor, C29, is a small-capacity high-frequency bypass capacitor, which can be a ceramic capacitor. Its function is to filter out high-frequency noise in the input signal. High-frequency signals pass more easily through small capacitors, thus making the electrical signal entering the second voltage conversion chip U3 purer, reducing the interference of high-frequency noise on the chip's operation, and improving the power supply quality. The thirtieth capacitor, C30, can be a small-capacity ceramic capacitor, serving as a high-frequency bypass capacitor at the output end. Its main function is to filter out high-frequency noise in the output voltage, making the output voltage purer and reducing the impact of high-frequency noise on the load circuit (the circuit powered by the second power supply circuit). The thirty-first capacitor, C31, can be a large-capacity output filter capacitor, specifically an electrolytic capacitor or a tantalum capacitor. Its function is to filter out low-frequency ripple in the output voltage and stabilize the output voltage. During operation, although the second voltage conversion chip U3 can adjust the voltage, the output voltage may still experience low-frequency fluctuations. Large-capacity capacitors can smooth these fluctuations through charging and discharging, ensuring the stability of the output voltage and meeting the load's power supply stability requirements. Through the coordinated operation of these capacitors, the power supply is filtered at both the input and output terminals, making both the power input to and output of the second voltage conversion chip U3 more stable and pure. This ensures the stable and reliable operation of the second voltage conversion chip U3 and the downstream load circuitry.
[0042] In one embodiment, the second voltage conversion chip U3 can be an AMS1117-3.3_C426566, which converts 5V DC to 3.3V DC. Alternatively, the second voltage conversion chip U3 can be an AIP1117-3.3, AMS1117-3.3 SOT-223, or other models capable of performing the same voltage conversion operation.
[0043] Optionally, the wireless communication circuit includes a first transistor Q1, a twentieth resistor R20, and a first light-emitting diode D1. The base of the first transistor Q1 is connected to the receiver chip U1, and its emitter is connected to the output terminal of the second power supply circuit. The collector of the first transistor Q1 is connected to the first end of the twentieth resistor R20, and the second end of the twentieth resistor R20 is connected to the anode of the first light-emitting diode D1. The cathode of the first light-emitting diode D1 is grounded. Communication between the wireless UHF receiver circuit and other devices is achieved by controlling the first light-emitting diode D1 to emit light at a specific frequency.
[0044] In one embodiment, the first light-emitting diode D1 can be used to emit infrared light. The receiving circuit transmits infrared information through the first light-emitting diode D1 to adjust the frequency of the handheld microphone, thereby synchronizing the communication frequency between the handheld microphone and the receiver.
[0045] Optionally, the wireless communication circuit may further include a twenty-first resistor R21 and a twenty-second resistor R22. The first end of the twenty-first resistor R21 is connected to the receiver chip U1, and the second end is connected to the second end of the twenty-second resistor R22 and the base of the first transistor Q1. The first end of the twenty-second resistor R22 is connected to the output terminal of the second power supply circuit.
[0046] Optionally, the button circuit includes multiple sub-circuits with identical circuit structures. Each sub-circuit includes a button resistor and a switch button. The first end of the button resistor is connected to the output terminal of the second power supply circuit, and the first end of the button resistor is connected to the button signal receiving terminal of the receiving chip U1 and the first end of the switch button. The second end of the switch button is grounded. Parameters such as volume and frequency are adjusted through the sub-circuits in the button circuit. Different buttons in different sub-circuits can be used to generate different button commands.
[0047] In one embodiment, the button resistors may include the twenty-fifth resistor R25, the twenty-fourth resistor R24, and the twenty-third resistor R23, and the switch buttons may include SW1, SW2, and SW3, with each switch button connected to one button resistor. Pressing a switch button generates a voltage level change, which is transmitted to the receiving chip U1. The receiving chip U1 detects the voltage level change and generates a corresponding action based on it.
[0048] Optionally, when the peripheral module includes a display circuit, the display circuit may include a display module, which displays corresponding information based on the data transmitted by the receiving chip U1.
[0049] Optionally, the display module may include a display module and a nineteenth resistor R19. The display module is connected to the receiving chip U1, and the voltage terminal of the display module is connected to the second power supply circuit through the nineteenth resistor R19.
[0050] In one embodiment, the display module can be 0.96OLED_4P_MODULE_JX, or it can be SSD1306 or other devices capable of displaying images based on the information transmitted by the receiving chip U1.
[0051] Optionally, the signal output circuit includes a digital-to-analog converter (DAC) circuit and an operational amplifier (op-amp) circuit. The input terminal of the DAC circuit is connected to the receiver chip U1, and the output terminal of the DAC circuit is connected to the op-amp circuit. The DAC circuit can convert the demodulated IIS digital audio signal from the receiver chip U1 into an analog signal. The op-amp circuit amplifies the analog signal (adjusts the audio signal replication) for subsequent devices to perform audio playback, filtering, signal detection, and other operations.
[0052] Optionally, the operational amplifier circuit includes operational amplifier U5, a sixteenth resistor R16, a fifteenth resistor R15, a fourteenth resistor R14, an eleventh resistor R11, and a thirty-sixth capacitor C36. The first end of the sixteenth resistor R16 is connected to the output terminal of the second power supply circuit, the second end of the sixteenth resistor R16 is connected to the positive power supply terminal of operational amplifier U5 and the second end of the fifteenth resistor R15, the first end of the fifteenth resistor R15 is connected to the second end of the fourteenth resistor R14 and the non-inverting input terminal of operational amplifier U5, and the first end of the fourteenth resistor R14 is grounded. The inverting input terminal of operational amplifier U5 is connected to the output terminal of the digital-to-analog converter circuit, the first end of the eleventh resistor R11, and the first end of the thirty-sixth capacitor C36, and the second ends of the eleventh resistor R11 and the thirty-sixth capacitor C36 are connected to the output terminal of operational amplifier U5.
[0053] Optionally, the operational amplifier circuit may further include a 37th capacitor C37, a 38th capacitor C38, a 39th capacitor C39, a 40th capacitor C40, a 12th resistor R12, a 13th resistor R13, and a 41st capacitor C41. The first terminal of the 37th capacitor C37 is connected to the second terminal of the 11th resistor R11 and the output terminal of the operational amplifier U5. The second terminal of the 37th capacitor C37 is connected to the output terminal of the operational amplifier circuit. The first terminal of the 12th resistor R12 is connected to the output terminal of the digital-to-analog converter circuit, and the second terminal is connected to the inverting input terminal of the operational amplifier U5. The first terminal of the 39th capacitor C39 is grounded and connected to the first terminal of the 38th capacitor C38. The second terminal of the 39th capacitor C39 is connected to the second terminal of the 14th resistor R14. The second terminal of the 38th capacitor C38 is connected to the first terminal of the 13th resistor R13. The second terminal of the 13th resistor R13 is connected to the non-inverting input terminal of the operational amplifier U5 and the first terminal of the 15th resistor R15. The second terminal of the fortieth capacitor C40 and the second terminal of the forty-first capacitor C41 are grounded. The first terminal of the fortieth capacitor C40 is connected to the first terminal of the forty-first capacitor C41 and the second terminal of the sixteenth resistor R16.
[0054] Optionally, the digital-to-analog converter circuit includes a digital-to-analog converter chip U2, a 23rd capacitor C23, a second inductor L2, and a 25th capacitor C25. The digital-to-analog converter chip U2 is connected to the receiver chip U1. The audio signal output pin of the digital-to-analog converter chip U2 is connected to the first end of the 23rd capacitor C23. The second end of the 23rd capacitor C23 is connected to the first end of the second inductor L2. The second end of the second inductor L2 is connected to the first end of the 25th capacitor C25 and the input terminal of the operational amplifier circuit. The second end of the 25th capacitor C25 is grounded.
[0055] The wireless UHF receiving circuit provided in this application includes a receiving module and a peripheral module. The receiving module has a receiving chip that integrates peripheral control functions and signal receiving functions. The receiving chip is connected to an antenna and the peripheral module to receive radio frequency signals and communicate with the peripheral module. The peripheral module includes at least one of a power supply circuit, a wireless communication circuit, a display circuit, a button circuit, and a signal output circuit. This application's embodiment utilizes a receiving chip with integrated peripheral control functions to communicate with the peripheral module, thereby avoiding the need for a control chip and related circuitry. This effectively reduces the complexity of the receiving circuit, the number of circuit components, and the circuit cost, and also effectively achieves circuit miniaturization, expanding the application range of the receiving circuit.
[0056] Based on the same inventive concept, this application also proposes a microphone system, such as Figure 11 As shown, the microphone system includes a receiver and a microphone, and the receiver is communicatively connected to the microphone. The receiver includes a wireless U-band receiving circuit as described in the above embodiment.
[0057] The terms "first," "second," "third," "fourth," "1," "2," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that shown in the illustrations or text descriptions.
[0058] It should be understood that although arrows indicate various operation steps in the flowcharts of this application's embodiments, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application's embodiments, the implementation steps in each flowchart can be executed in other orders as required. Furthermore, some or all steps in each flowchart, based on the actual implementation scenario, may include multiple sub-steps or multiple stages. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage can also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application's embodiments do not limit this.
[0059] The above description is only an optional implementation method for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application without departing from the technical concept of this application also fall within the protection scope of the embodiments of this application.
Claims
1. A wireless UHF receiver circuit, characterized in that, The device includes a receiving module and a peripheral module. The receiving module is equipped with a receiving chip that integrates peripheral control functions and signal receiving functions. The receiving chip is connected to an antenna and the peripheral module to receive radio frequency signals and communicate with the peripheral module. The peripheral module includes at least one of a power supply circuit, a wireless communication circuit, a display circuit, a button circuit, and a signal output circuit.
2. The wireless U-band receiving circuit according to claim 1, characterized in that, The peripheral module includes a power supply circuit with a first power supply circuit and a second power supply circuit. The output terminals of the first power supply circuit and the second power supply circuit are connected to the receiving chip. The voltages output by the first power supply circuit and the second power supply circuit are different.
3. The wireless U-band receiving circuit according to claim 2, characterized in that, The wireless U-band receiving circuit also includes a first interface, which is connected to the first power supply circuit, the second power supply circuit, and the receiving chip respectively. The first interface is used to provide power to the first power supply circuit and the second power supply circuit and to provide a data transmission port for the receiving chip. The first interface includes a USB interface.
4. The wireless U-band receiving circuit according to claim 3, characterized in that, The first power supply circuit includes a first voltage conversion chip, a thirty-second capacitor, a thirty-third capacitor, a fourth inductor, a forty-third capacitor, and a forty-second capacitor. The voltage input terminal and enable terminal of the first voltage conversion chip are connected to the first interface. The second terminals of the thirty-second and thirty-third capacitors are grounded. The first terminals of the thirty-second and thirty-third capacitors are connected to the voltage input terminal of the first voltage conversion chip. The first terminals of the forty-third and forty-second capacitors are connected to the second terminal of the fourth inductor and the receiving chip. The second terminals of the forty-third and forty-second capacitors are grounded. The first terminal of the fourth inductor is connected to the external power supply inductor terminal of the first voltage conversion chip.
5. The wireless U-band receiving circuit according to claim 3, characterized in that, The second power supply circuit includes a second voltage conversion chip, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirtieth capacitor, and a thirty-first capacitor. The first end of the twenty-eighth capacitor and the first end of the twenty-ninth capacitor are connected to the first interface and the voltage input terminal of the second voltage conversion chip, and the second end of the twenty-eighth capacitor and the second end of the twenty-ninth capacitor are grounded. The first voltage output terminal of the second voltage conversion chip is connected to the second voltage output terminal of the second voltage conversion chip, the first terminal of the thirtieth capacitor, the first terminal of the thirty-first capacitor, and the receiving chip. The second terminals of the thirtieth capacitor and the second terminal of the thirty-first capacitor are grounded.
6. The wireless U-band receiving circuit according to claim 2, characterized in that, The wireless communication circuit includes a first transistor, a twentieth resistor, and a first light-emitting diode. The base of the first transistor is connected to the receiving chip, and the emitter is connected to the output terminal of the second power supply circuit. The collector of the first transistor is connected to the first end of the twentieth resistor, and the second end of the twentieth resistor is connected to the anode of the first light-emitting diode. The cathode of the first light-emitting diode is grounded.
7. The wireless U-band receiving circuit according to claim 2, characterized in that, The button circuit includes multiple sub-circuits with the same circuit structure. The sub-circuit includes a button resistor and a switch button. The first end of the button resistor is connected to the output end of the second power supply circuit. The first end of the button resistor is connected to the button signal receiving end of the receiving chip and the first end of the switch button. The second end of the switch button is grounded.
8. The wireless U-band receiving circuit according to claim 2, characterized in that, The signal output circuit includes a digital-to-analog converter circuit and an operational amplifier circuit. The input terminal of the digital-to-analog converter circuit is connected to the receiving chip, and the output terminal of the digital-to-analog converter circuit is connected to the operational amplifier circuit.
9. The wireless U-band receiving circuit according to claim 8, characterized in that, The operational amplifier circuit includes an operational amplifier, a sixteenth resistor, a fifteenth resistor, a fourteenth resistor, an eleventh resistor, and a thirty-sixth capacitor. The first end of the sixteenth resistor is connected to the output terminal of the second power supply circuit. The second end of the sixteenth resistor is connected to the positive power supply terminal of the operational amplifier and the second end of the fifteenth resistor. The first end of the fifteenth resistor is connected to the second end of the fourteenth resistor and the non-inverting input terminal of the operational amplifier. The first end of the fourteenth resistor is grounded. The inverting input terminal of the operational amplifier is connected to the output terminal of the digital-to-analog converter circuit, the first terminal of the eleventh resistor, and the first terminal of the thirty-sixth capacitor. The second terminal of the eleventh resistor and the second terminal of the thirty-sixth capacitor are connected to the output terminal of the operational amplifier.
10. A microphone system, characterized in that, It includes a receiver and a microphone, the receiver being communicatively connected to the microphone, and the receiver including a wireless UHF receiving circuit as described in any one of claims 1-9.