CN210157154U - Amplitude limiting module for adjusting audio amplification factor based on battery power or voltage - Google Patents
Amplitude limiting module for adjusting audio amplification factor based on battery power or voltage Download PDFInfo
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- CN210157154U CN210157154U CN201921300295.9U CN201921300295U CN210157154U CN 210157154 U CN210157154 U CN 210157154U CN 201921300295 U CN201921300295 U CN 201921300295U CN 210157154 U CN210157154 U CN 210157154U
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Abstract
The utility model provides an amplitude limiting module based on battery power or voltage regulation audio frequency magnification, the battery is through stepping up or dc-to-ac converter and power amplifier unit electric connection, power amplifier unit's signal terminal and amplifier circuit signal output part electric connection, amplifier circuit signal input part and audio signal input electric connection, wherein: including detection circuitry and filter circuit, detection circuitry and the anodal electric connection of battery, detection circuitry's output passes through diode D1 and zener diode D2 and is connected with filter circuit, filter circuit and the parallelly connected regulation magnification circuit of constituteing of electric capacity, adjust the parallelly connected electric connection of magnification circuit and amplifier circuit. The utility model discloses a coordinate battery residual capacity and power amplifier output, the protection battery, when avoiding the battery to discharge, output voltage crosses low and makes the discharge current too big in the battery unit interval, can not influence stereo set power amplifier live time and method because of the decline of battery capacity simultaneously.
Description
Technical Field
The utility model relates to a stereo set circuit design field, especially an amplitude limiting module based on battery power or voltage regulation audio frequency magnification.
Background
In the field of sound equipment power amplification, a battery is used for supplying power to the sound equipment power amplification, and the sound equipment power amplification requires that the battery automatically adjusts output voltage along with the change of a load and performs power adjustment so as to improve the dynamic performance of the battery and reduce the internal loss of the sound equipment power amplification. The stable voltage output by the power supply battery on the market can not meet the requirement when the load changes. The electric capacity of the battery is reduced along with the output of power in the use process, the output voltage of the battery is reduced when the sound power amplifier requires high-power output in the reduction process, the discharge current in the discharge unit time is increased for ensuring high-power output, and the battery is damaged by the long-term excessive discharge current, so that the service life of the battery is influenced. Meanwhile, the existing battery has a protection circuit with too low voltage, when the output voltage is reduced to be lower, the protection of the protection circuit can be triggered, the power supply of the sound power amplifier is cut off, and the waste of residual electric capacity in the battery pack is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned shortcoming of the prior art, the utility model aims at providing a limit module based on battery power or voltage regulation audio frequency magnification.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an amplitude limiting module based on battery power or voltage regulation audio frequency magnification, the battery is through stepping up or dc-to-ac converter and power amplifier unit electric connection, power amplifier unit's signal terminal and amplifier circuit signal output part electric connection, amplifier circuit signal input part and audio signal input electric connection, wherein: including detection circuitry and filter circuit, detection circuitry and the anodal electric connection of battery, detection circuitry's output passes through diode D1 and zener diode D2 and is connected with filter circuit, filter circuit and the parallelly connected regulation magnification circuit of constituteing of electric capacity, adjust the parallelly connected electric connection of magnification circuit and amplifier circuit.
As a further improvement of the utility model: and a negative voltage circuit is electrically connected between the detection circuit and the battery and is used for generating negative voltage, and the absolute value of the negative voltage is the same as the nominal voltage of the battery.
Compared with the prior art, the beneficial effects of the utility model are that: the battery is protected by coordinating the residual capacity of the battery and the output power of the power amplifier, the phenomenon that when the battery discharges, the output voltage is too low, so that the discharge current of the battery in unit time is too high is avoided, and meanwhile, the service time and the method of the sound power amplifier cannot be influenced by the reduction of the capacity of the battery.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings, in which:
referring to fig. 1, a limiting module for adjusting an audio amplification factor based on the electric quantity or voltage of a battery, wherein the battery is electrically connected with a power amplification unit through a booster or an inverter, and is used for supplying power to the power amplification unit. The signal end and the amplifier circuit signal output part electric connection of power amplifier unit, amplifier circuit signal input part and audio signal input electric connection, amplifier circuit includes an operational amplifier U2, operational amplifier U1's inverting input end passes through resistance R1 and audio signal input electric connection, operational amplifier U2's output passes through resistance R2 and power amplifier unit's signal end electric connection.
Wherein: the detection circuit comprises an operational amplifier U2, a battery anode series resistor R3 is connected to the non-inverting input end of the operational amplifier U2, the non-inverting input end of the operational amplifier U2 is connected with a negative voltage circuit, the negative voltage circuit generates negative voltage through a voltage stabilizing diode D3 arranged on the negative pole of a power supply, and the absolute value of the negative voltage and the nominal voltage value of the battery are both 12V. When the battery discharges, the battery capacity decreases, in order to meet the power output of the power amplifier, the output voltage of the battery is pulled down, the operational amplifier U2 obtains the voltage difference through the negative voltage circuit, and the output end of the operational amplifier U2 is connected with the filter circuit through the diode D1 and the voltage-stabilizing diode D2.
The filter circuit is connected with a capacitor C1 in parallel to form an adjusting amplification circuit, and the adjusting amplification circuit is electrically connected with the operational amplifier U1 in parallel. The circuit for adjusting the amplification factor obtains the amplified voltage difference, and the amplified voltage difference is accessed to an operational amplifier U1 channel, so that the amplification factor is reduced, the power output of the power amplifier unit is adjusted, the volume is reduced, and the tone quality is ensured.
The embodiment protects the battery by coordinating the residual capacity of the battery and the output power of the power amplifier, avoids overlarge discharge current of the battery in unit time caused by overlow output voltage when the battery is discharged, and simultaneously does not influence the service time and the method of the sound power amplifier due to the reduction of the capacity of the battery.
In this embodiment, the output voltage of the battery is pulled down, and the power output of the power amplifier unit is adjusted by reducing the operational amplification factor, so that the battery voltage can be prevented from being pulled down to the lowest output voltage limited by the trigger protection circuit, the battery protection circuit is not easy to misjudge, and the protection working circuit is more stable.
The embodiment meets the audition of power amplifier output, ensures the use safety of the battery and the maximum performance of the battery, can match the battery with smaller capacity to meet the audition requirement on the premise of meeting the power output of the same power amplifier unit, and simultaneously has longer service time of the battery with the same capacity to achieve the purposes of improving the whole working efficiency and reducing the cost.
In conclusion, after the ordinary skilled in the art reads the document of the present invention, according to the present invention, the technical solution and technical concept of the present invention do not need creative mental labor to make other various corresponding transformation schemes, which all belong to the protection scope of the present invention.
Claims (2)
1. The utility model provides an amplitude limiting module based on battery power or voltage regulation audio frequency magnification, the battery is through stepping up or dc-to-ac converter and power amplifier unit electric connection, power amplifier unit's signal terminal and amplifier circuit signal output part electric connection, amplifier circuit signal input part and audio signal input electric connection, characterized by: including detection circuitry and filter circuit, detection circuitry and the anodal electric connection of battery, detection circuitry's output passes through diode D1 and zener diode D2 and is connected with filter circuit, filter circuit and the parallelly connected regulation magnification circuit of constituteing of electric capacity, adjust the parallelly connected electric connection of magnification circuit and amplifier circuit.
2. The clipping module of claim 1, wherein the clipping module adjusts the audio amplification factor based on battery level or voltage, and wherein: and a negative voltage circuit is electrically connected between the detection circuit and the battery and is used for generating negative voltage, and the absolute value of the negative voltage is the same as the nominal voltage of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921300295.9U CN210157154U (en) | 2019-08-12 | 2019-08-12 | Amplitude limiting module for adjusting audio amplification factor based on battery power or voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921300295.9U CN210157154U (en) | 2019-08-12 | 2019-08-12 | Amplitude limiting module for adjusting audio amplification factor based on battery power or voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210157154U true CN210157154U (en) | 2020-03-17 |
Family
ID=69766880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921300295.9U Active CN210157154U (en) | 2019-08-12 | 2019-08-12 | Amplitude limiting module for adjusting audio amplification factor based on battery power or voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210157154U (en) |
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2019
- 2019-08-12 CN CN201921300295.9U patent/CN210157154U/en active Active
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