Sound equipment voltage delay circuit

Abstract

The utility model discloses a sound equipment voltage delay circuit, and relates to the technical field of delay circuits. According to the main technical scheme, the circuit comprises a triode QB04, a resistor RB27 and an electrolytic capacitor EB04, an emitting electrode of the triode QB04 is used for being connected with input voltage, and a collecting electrode of the triode QB04 is used for being connected with load sound equipment; one end of the resistor RB27 is connected with a base electrode of the triode QB04, and the other end of the resistor RB27 is connected with an emitting electrode of the triode QB04; the positive electrode of the electrolytic capacitor EB04 is connected with the other end of the resistor RB27 and the emitting electrode of the triode QB04, and the negative electrode of the electrolytic capacitor EB04 is connected with the collecting electrode of the triode QB04. When the input voltage suddenly changes, the electrolytic capacitor EB04 absorbs or releases charges to delay the conduction and cut-off processes of the triode QB04, so that the aim of effectively reducing the impact noise when the power supply is turned on / off is fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of delay circuits, in particular to an audio voltage delay circuit. Background Art

[0002] With the advancement of technology and consumers' ever-increasing demands for sound quality, audio equipment must not only provide high-quality audio playback capabilities but also offer a good user experience. During actual use, especially when turning the power on or off, sudden voltage fluctuations often produce unpleasant "pops" or other forms of impact noise, which not only affects the user's listening experience but can also cause damage to the electronic components within the audio equipment.

[0003] To reduce surge noise, existing audio equipment typically uses RC (resistor-capacitor) filtering circuits to smooth voltage fluctuations. However, these circuits often provide only limited protection and are ineffective in reducing surge noise caused by rapid voltage changes. Utility Model Content

[0004] The purpose of the utility model is to provide an audio voltage delay circuit, which solves the problem that most RC (resistance-capacitance) filter circuits in existing audio equipment can only provide limited protection and cannot effectively reduce the impact noise caused by rapid voltage changes.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An audio voltage delay circuit includes a transistor QB04, a resistor RB27, and an electrolytic capacitor EB04. The emitter of the transistor QB04 is used to connect to an input voltage, and the collector of the transistor QB04 is used to connect to a load audio system. One end of the resistor RB27 is connected to the base of the transistor QB04, and the other end of the resistor RB27 is connected to the emitter of the transistor QB04. The positive electrode of the electrolytic capacitor EB04 is connected to the other end of the resistor RB27 and the emitter of the transistor QB04, and the negative electrode of the electrolytic capacitor EB04 is connected to the collector of the transistor QB04.

[0007] A further technical solution is: the audio voltage delay circuit also includes a diode DB07; the anode of the diode DB07 is connected to the anode of the electrolytic capacitor EB04, and the anode of the diode DB07 is used to receive the input voltage; the cathode of the diode DB07 is connected to the emitter of the transistor QB04.

[0008] A further technical solution is: the audio voltage delay circuit further includes an electrolytic capacitor EB03; the positive electrode of the electrolytic capacitor EB03 is connected to the negative electrode of the diode DB07; and the negative electrode of the electrolytic capacitor EB03 is grounded.

[0009] A further technical solution is: the audio voltage delay circuit also includes a resistor RB32; one end of the resistor RB32 is connected to the negative electrode of the electrolytic capacitor EB04, and one end of the resistor RB32 is grounded; the other end of the resistor RB32 is connected to the collector of the transistor QB04.

[0010] A further technical solution is: the audio voltage delay circuit also includes a resistor RB28 and a diode DB06; one end of the resistor RB28 is connected to the positive electrode of the electrolytic capacitor EB04 and the other end of the resistor RB27; the other end of the resistor RB28 is connected to the positive electrode of the diode DB07; the positive electrode of the diode DB06 is connected to one end of the resistor RB28, the positive electrode of the electrolytic capacitor EB04, and the other end of the resistor RB27; the cathode of the diode DB06 is connected to the other end of the resistor RB28 and the positive electrode of the diode DB07.

[0011] A further technical solution is: the audio voltage delay circuit also includes a resistor RB52; one end of the resistor RB52 is used to connect the input voltage; the other end of the resistor RB52 is connected to the other end of the resistor RB28, the cathode of the diode DB06, and the anode of the diode DB07.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] One end of resistor RB27 is connected to the base of transistor QB04, and the other end is connected to the emitter of transistor QB04. The positive electrode of electrolytic capacitor EB04 is connected to both the other end of resistor RB27 and the emitter of transistor QB04, while the negative electrode of electrolytic capacitor EB04 is connected to the collector of transistor QB04. When the input voltage changes suddenly, electrolytic capacitor EB04 absorbs or releases charge, delaying the turn-on and turn-off of transistor QB04, thereby effectively reducing the surge noise during power on / off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 1 is a circuit structure topology diagram of an audio voltage delay circuit in this embodiment. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Example

[0017] This embodiment provides an audio voltage delay circuit, such as Figure 1 As shown, it includes a transistor QB04, a resistor RB27 and an electrolytic capacitor EB04. The emitter of the transistor QB04 is used to connect to the input voltage, and the collector of the transistor QB04 is used to connect to the load audio; one end of the resistor RB27 is connected to the base of the transistor QB04, and the other end of the resistor RB27 is connected to the emitter of the transistor QB04; the positive electrode of the electrolytic capacitor EB04 is connected to the other end of the resistor RB27 and the emitter of the transistor QB04, and the negative electrode of the electrolytic capacitor EB04 is connected to the collector of the transistor QB04.

[0018] The working principle of an audio voltage delay circuit in this embodiment is as follows:

[0019] When an input voltage is connected to the input port I NPUT, it is applied to the emitter of transistor QB04 and the positive terminal of electrolytic capacitor EB04. Simultaneously, the input voltage is applied to the base of transistor QB04 through resistor RB27. At this point, electrolytic capacitor EB04 begins to charge, and the voltage across it gradually rises, causing the base voltage of transistor QB04 to gradually rise. This in turn delays the conduction of transistor QB04, effectively reducing impulse noise. When the base-emitter voltage of transistor QB04 reaches its turn-on voltage (typically 0.6V to 0.7V), transistor QB04 turns on, and current flows through the output port OUTPUT into the load speaker, causing the speaker to produce sound output.

[0020] When the input voltage decreases or disappears suddenly, the electrolytic capacitor EB04 begins to discharge, and the voltage across the electrolytic capacitor EB04 gradually decreases, causing the base voltage of the transistor QB04 to gradually decrease, thereby delaying the cut-off process of the transistor QB04, thereby further effectively reducing the impact noise.

[0021] When the input voltage changes suddenly (such as when the power is turned on or off), the electrolytic capacitor EB04 absorbs or releases charge to delay the turn-on and turn-off process of the transistor QB04, thereby effectively reducing the impact noise when turning the power on / off.

[0022] During implementation, the charge and discharge rates of electrolytic capacitor EB04 can be adjusted by adjusting the resistance of resistor RB27 to adjust the delay time. Furthermore, the delay characteristics can be adjusted by adjusting the capacity of electrolytic capacitor EB04 to meet the needs of different audio systems.

[0023] In this embodiment, if Figure 1As shown, the audio voltage delay circuit further includes a diode DB07; the anode of the diode DB07 is connected to the anode of the electrolytic capacitor EB04, and the anode of the diode DB07 is used to receive the input voltage; the cathode of the diode DB07 is connected to the emitter of the transistor QB04.

[0024] For example, during implementation, when input voltage is connected to input port I NPUT, the input voltage is rectified by diode DB07 and then applied to the emitter of transistor QB04. This helps reduce circuit instability caused by input voltage fluctuations. Furthermore, it reduces impulse noise generated by high-frequency components or fluctuations in the input voltage, effectively minimizing the impact of impulse noise on the sound quality of the speaker system.

[0025] At the same time, when a reverse voltage or excessive forward voltage appears in the input voltage, diode DB07 will cut off or limit the current, thereby effectively reducing the risk of abnormal voltage damaging subsequent circuits (especially transistor QB04).

[0026] In this embodiment, if Figure 1 As shown, the audio voltage delay circuit further includes an electrolytic capacitor EB03; the positive electrode of the electrolytic capacitor EB03 is connected to the negative electrode of the diode DB07; and the negative electrode of the electrolytic capacitor EB03 is grounded.

[0027] For example, during implementation, when input voltage is connected to input port I NPUT, the input voltage is rectified by diode DB07 and filtered by electrolytic capacitor EB03 before being applied to the emitter of transistor QB04. This filtering of the input voltage after rectification by diode DB07 by electrolytic capacitor EB03 effectively reduces input voltage fluctuations, thereby helping to mitigate circuit instability caused by voltage fluctuations and improving the stability of the audio system. Furthermore, the energy storage function of electrolytic capacitor EB03 enables the circuit to maintain normal operating voltage even when the input voltage experiences brief dips or fluctuations, thereby enhancing the circuit's anti-interference capabilities.

[0028] In this embodiment, if Figure 1 As shown, the audio voltage delay circuit further includes a resistor RB32; one end of the resistor RB32 is connected to the negative electrode of the electrolytic capacitor EB04, and one end of the resistor RB32 is grounded; the other end of the resistor RB32 is connected to the collector of the transistor QB04.

[0029] For example, during implementation, when transistor QB04 is in the on state, the current of the collector of transistor QB04 will flow through resistor RB32, effectively limiting the current flowing through the load speaker, thereby achieving the purpose of helping to protect the load speaker from damage due to excessive current and stabilizing the circuit working state.

[0030] In this embodiment, if Figure 1 As shown, the audio voltage delay circuit also includes a resistor RB28 and a diode DB06; one end of the resistor RB28 is connected to the positive electrode of the electrolytic capacitor EB04 and the other end of the resistor RB27; the other end of the resistor RB28 is connected to the positive electrode of the diode DB07; the positive electrode of the diode DB06 is connected to one end of the resistor RB28, the positive electrode of the electrolytic capacitor EB04, and the other end of the resistor RB27; the cathode of the diode DB06 is connected to the other end of the resistor RB28 and the positive electrode of the diode DB07.

[0031] For example, during implementation, resistor RB28 can limit the current through diode DB07, preventing excessive current from impacting the circuit. Furthermore, when the input voltage suddenly increases, diode DB06 turns on, dissipating the excess voltage through diode DB06 to minimize damage to other components in the circuit.

[0032] In this embodiment, if Figure 1 As shown, the audio voltage delay circuit further includes a resistor RB52; one end of the resistor RB52 is used to connect the input voltage; the other end of the resistor RB52 is connected to the other end of the resistor RB28, the cathode of the diode DB06, and the anode of the diode DB07.

[0033] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or arrangement of the subject combination arrangement. In addition to variations and modifications to the components and / or arrangement, other uses will also be apparent to those skilled in the art.

Claims

1. An audio voltage delay circuit, characterized in that: include: Transistor QB04, the emitter of the transistor QB04 is used to connect to the input voltage, and the collector of the transistor QB04 is used to connect to the load audio; a resistor RB27, one end of the resistor RB27 being connected to the base of the transistor QB04, and the other end of the resistor RB27 being connected to the emitter of the transistor QB04; The electrolytic capacitor EB04 has a positive electrode connected to the other end of the resistor RB27 and the emitter of the transistor QB04, and a negative electrode connected to the collector of the transistor QB04.

2. The audio voltage delay circuit according to claim 1, characterized in that: Also includes diode DB07; The anode of the diode DB07 is connected to the anode of the electrolytic capacitor EB04, and the anode of the diode DB07 is used to receive the input voltage; The cathode of the diode DB07 is connected to the emitter of the transistor QB04.

3. The audio voltage delay circuit according to claim 2, characterized in that: Also includes electrolytic capacitor EB03; The positive electrode of the electrolytic capacitor EB03 is connected to the negative electrode of the diode DB07; The negative electrode of the electrolytic capacitor EB03 is grounded.

4. The audio voltage delay circuit according to claim 3, characterized in that: Also includes resistor RB32; One end of the resistor RB32 is connected to the negative electrode of the electrolytic capacitor EB04, and one end of the resistor RB32 is grounded; The other end of the resistor RB32 is connected to the collector of the transistor QB04.

5. The audio voltage delay circuit according to claim 4, characterized in that: Also included are resistor RB28 and diode DB06; One end of the resistor RB28 is connected to the positive electrode of the electrolytic capacitor EB04 and the other end of the resistor RB27; The other end of the resistor RB28 is connected to the anode of the diode DB07; The anode of the diode DB06 is connected to one end of the resistor RB28, the anode of the electrolytic capacitor EB04, and the other end of the resistor RB27; The cathode of the diode DB06 is connected to the other end of the resistor RB28 and the anode of the diode DB07.

6. The audio voltage delay circuit according to claim 5, characterized in that: Also includes resistor RB52; One end of the resistor RB52 is used to connect to the input voltage; The other end of the resistor RB52 is connected to the other end of the resistor RB28 , the cathode of the diode DB06 , and the anode of the diode DB07 .

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