CN216491018U - Energy storage circuit for passive control of loudspeaker - Google Patents
Energy storage circuit for passive control of loudspeaker Download PDFInfo
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- CN216491018U CN216491018U CN202122892980.9U CN202122892980U CN216491018U CN 216491018 U CN216491018 U CN 216491018U CN 202122892980 U CN202122892980 U CN 202122892980U CN 216491018 U CN216491018 U CN 216491018U
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Abstract
The invention discloses an energy storage circuit for passive control of a loudspeaker, which is suitable for a high-power and non-high-frequency loudspeaker. The frequency selection network, the rectification network and the DC-DC module are sequentially connected, and the energy changed in the loudspeaker is converted into proper energy storage voltage to be supplied to the energy storage element; the management module controls the DC-DC module according to the energy of the loudspeaker and the condition of the energy storage voltage, and optimizes the performance of the control circuit. The energy storage circuit is arranged at the passive end of the loudspeaker connected with the audio amplification circuit, so that a stable and reliable power supply can be provided for the control circuit of a passive end according to the condition of an audio signal, and the damage to the tone quality is avoided.
Description
Technical Field
The invention relates to the field of electronic products, in particular to an energy storage circuit for passive control of a loudspeaker.
Background
The loudspeaker is visible everywhere in the audio system, and is small enough to be a self-made sound system, and large enough to be an alarm and broadcast system. As an electroacoustic conversion device, various performances of the loudspeaker are not conveniently controlled like a circuit; and due to the uncertainty and drivability of the audio signal, the behavior of the loudspeaker needs to be observed in real time. Therefore, in order to improve the performance of the audio system, in addition to the circuit innovation, real-time monitoring and control according to the condition of the speaker are required.
However, the loudspeaker is used as a switching device, the voltage is unstable and not continuous, and the loudspeaker cannot supply power for an auxiliary monitoring and control circuit per se; and improper energy loss on the speaker can seriously affect the sound quality.
Therefore, for effective monitoring and control at the speaker end, it is necessary to provide a tank circuit for passive control of the speaker.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a tank circuit for passive control of a speaker, which is suitable for a high-power and non-high-frequency speaker, and comprises a frequency selection network, a rectification network, a DC-DC module, an energy storage element, and a management module. The input end of the frequency selection network is connected with a loudspeaker, the frequency selection network is sequentially connected with the rectification network and the DC-DC module, and the rectified available voltage is output to provide energy for the energy storage element. The management module controls the DC-DC module according to the energy of the loudspeaker and the energy storage voltage of the energy storage element, and optimizes the performance of the control circuit.
The frequency selection network is a low-frequency filter, the cut-off frequency is lower than the highest value of the medium frequency in the audible frequency range of human ears, the input end is connected with a loudspeaker to obtain the energy in the available frequency band, and the output end is connected with the rectifier network. The rectification network shapes the voltage in the available frequency band into pulsating direct current, and the output end of the rectification network is connected with the input end of the DC-DC module to adjust the energy storage voltage of the DC-DC module. The DC-DC module converts the pulsating direct current into energy storage voltage according to the instruction of the management module, the control end is connected with the output end of the management module, and the output end is connected with the energy storage element to provide energy for the energy storage element. The energy storage element is a super capacitor, one end of the energy storage element is connected with the output end of the DC-DC module, and the other end of the energy storage element is grounded.
The DC-DC module comprises a switch tube, and the control end of the switch tube is the control end of the DC-DC module and is connected with the output end of the management module.
The management module controls the DC-DC module according to the energy of the loudspeaker and the energy storage voltage of the energy storage element, optimizes the performance of the control circuit and comprises a starting unit, a power supply control unit and a driving unit. The starting unit is used as a temporary power supply when the audio system is powered on or the instantaneous energy provided by the loudspeaker is not up to demand, and comprises a first diode, a second clamping diode, a third diode, a first resistor and a small-capacity energy storage element; the anode of the first diode is connected with the anode of the small-capacity energy storage element, and the cathode of the first diode is connected with the power supply end of the power supply control unit; the anode of the second clamping diode is grounded, and the cathode of the second clamping diode is connected with the anode of the small-capacity energy storage element; the anode of the third diode is connected with the output end of the rectifier network, and the cathode of the third diode is connected with one end of the first resistor; the other end of the first resistor is connected with the positive electrode of the small-capacity energy storage element and the first input end of the power management unit; and the positive electrode of the small-capacity energy storage element is connected with the other end of the first resistor, and the negative electrode of the small-capacity energy storage element is grounded. The power supply control unit is used for controlling the static power consumption of the energy storage circuit and controlling the driving unit, a first input end is connected with the other end of the first resistor, a second input end is connected with the ungrounded end of the energy storage element through a voltage division circuit, a power supply end is connected with the ungrounded end of the energy storage element and the cathode of the first diode through a fourth diode, and an output end is connected with one input end of the driving unit; the driving unit is used for adjusting the duty ratio of a switching tube in the DC-DC module according to the energy storage voltage, the energy provided by the loudspeaker and the control of the power supply control unit, and mainly comprises a first operational amplifier, a first comparator, a second comparator and an AND gate; the input end of the first operational amplifier is connected with the output end of the rectifying network and the ungrounded end of the energy storage element through a voltage division circuit, the other input end of the first operational amplifier is connected with a first reference voltage, and the output end of the first operational amplifier is connected with one input end of the first comparator; the other input end of the first comparator is a triangular wave signal, and the output end of the first comparator is connected with one input end of the AND gate; one input end of the second comparator is directly connected with the ungrounded end of the energy storage element, the other input end of the second comparator is connected with a second reference voltage, and an enabling signal at the output end of the second comparator is connected with the other input end of the AND gate; and the output end of the AND gate is connected with the control end of the DC-DC module.
When the input end of the power supply control unit detects that the output of the rectifier network is 0, namely the loudspeaker has no energy and the audio system is turned off, the enabling signal is low, namely the driving unit is turned off.
According to the energy storage circuit for the passive control of the loudspeaker, the energy storage circuit can be arranged at the passive end of the loudspeaker connected with the audio amplification circuit, a stable power supply is provided for a control circuit at a passive end according to the condition of an audio signal, the damage to the tone quality is avoided, and the effective protection and control of an audio system are realized.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a system block diagram of a tank circuit for passive control of a speaker according to the present invention;
FIG. 2 is a circuit diagram of a driving unit according to the present invention;
numbering in the figures:
10: a frequency selective network; 20: a rectifier network; 30: a DC-DC module; 40: an energy storage element;
50: a management module; 501: a power supply control unit; 502: a drive unit;
d1: a first diode; d2: a second clamping diode; d3: a third diode; d4: fourth diode
R1: a first resistor; c1: a small capacity energy storage element; a1: a first operational amplifier;
a2: a first comparator; a3: a second comparator; 5021: and an AND gate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Fig. 1 is a system block diagram of a tank circuit for passive control of a speaker according to the present invention. The system comprises a frequency selection network 10, a rectification network 20, a DC-DC module 30, an energy storage element 40 and a management module 50. The input end of the frequency selection network 10 is connected with a loudspeaker, and is sequentially connected with the rectification network 20 and the DC-DC module 30, and the rectified available voltage is output to provide energy for the energy storage element 40. The management module 50 controls the DC-DC module 30 according to the energy of the speaker and the energy storage voltage of the energy storage element 40, and optimizes the control circuit performance. The frequency selecting network 10 is a low-frequency filter, the input end is connected with a loudspeaker, and the output end is connected with a rectifying network 20. The output end of the rectification network 20 is connected to the input end of the DC-DC module 30, so that the DC-DC module 30 can regulate the energy storage voltage. The control end of the DC-DC module 30 is connected with the output end of the management module 50, and the output end is connected with the energy storage element 40. The energy storage element 40 is a super capacitor, one end of which is connected to the output end of the DC-DC module 30, and the other end of which is grounded. The management module 50 includes a start unit, a power control unit 501, and a drive unit 502. The starting unit comprises a first diode D1, a second clamping diode D2, a third diode D3, a first resistor R1 and a small-capacity energy storage element C1; the anode of the first diode D1 is connected to the anode of the small-capacity energy storage element C1, and the cathode is connected to the power supply end Vs of the power supply control unit 501; the anode of the second clamping diode D2 is grounded, and the cathode is connected with the anode of the small-capacity energy storage element C1; the anode of the third diode D3 is connected to the output end of the rectifier network 20, and the cathode is connected to one end of the first resistor R1; the other end of the first resistor R1 is connected to the anode of the small-capacity energy storage element C1 and the first input end of the power management unit 501; the positive electrode of the small-capacity energy storage element C1 is connected with the other end of the first resistor R1, and the negative electrode is grounded. The first input end of the power control unit 501 is connected to the other end of the first resistor R1, the second input end is connected to the ungrounded end of the energy storage element 40 through the voltage divider circuit, the power supply end is connected to the ungrounded end of the energy storage element 40 and the cathode of the first diode D1 through the fourth diode D4, and the output end is connected to one of the input ends of the driving unit 502. The other input end of the driving unit 502 is connected to the output end of the rectifying network 20, the feedback end is connected to the ungrounded end of the energy storage element 40 through the voltage dividing circuit, and the output end is connected to the control end of the DC-DC module 30.
Fig. 2 is a circuit diagram of a driving unit according to the present invention. The driving unit 502 mainly includes a first operational amplifier a1, a first comparator a2, a second comparator A3, and an and gate 5021; the input end of the first operational amplifier A1 is connected to the ungrounded end of the energy storage element 40 through a voltage division circuit, the other input end is connected to a reference voltage Vref1, and the output end is connected to one input end of the first comparator A2; the other input end of the first comparator A2 is a triangular wave signal, and the output end is connected with one input end of the AND gate 5021; one input end of the second comparator A3 is connected with the ungrounded end of the energy storage element 40, the other input end is connected with a reference voltage II Vref2, and the output end enable signal is connected with the other input end of the AND gate 5021; the output terminal of the and gate 5021 is connected to the control terminal of the DC-DC module 30.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. The energy storage circuit for the passive control of the loudspeaker is characterized by comprising a frequency selection network, a rectification network, a DC-DC module, an energy storage element and a management module; the input end of the frequency selection network is connected with a loudspeaker, is sequentially connected with the rectification network and the DC-DC module, and outputs the shaped available voltage; the management module controls the DC-DC module and optimizes the performance of the control circuit according to the energy of the loudspeaker and the energy storage voltage of the energy storage element;
the frequency selection network is a low-frequency filter, the cut-off frequency is lower than the highest value of the medium frequency in the audible frequency range of human ears, the input end of the frequency selection network is connected with a loudspeaker, and the output end of the frequency selection network is connected with the rectification network;
the rectification network shapes the voltage in the available frequency band into pulsating direct current, and the output end of the rectification network is connected with the input end of the DC-DC module for the DC-DC module to adjust the energy storage voltage;
the DC-DC module comprises a switch tube, a control end is connected with the output end of the management module, and the output end is connected with the energy storage element to provide energy for the energy storage element;
the energy storage element is a super capacitor, one end of the energy storage element is connected with the output end of the DC-DC module, and the other end of the energy storage element is grounded.
2. The tank circuit for passive control of a speaker according to claim 1, wherein the management module comprises a start unit, a power control unit and a drive unit; the starting unit comprises a first diode, a second clamping diode, a third diode, a first resistor and a small-capacity energy storage element; the anode of the first diode is connected with the anode of the small-capacity energy storage element, and the cathode of the first diode is connected with the power supply end of the power supply control unit; the anode of the second clamping diode is grounded, and the cathode of the second clamping diode is connected with the anode of the small-capacity energy storage element; the anode of the third diode is connected with the output end of the rectifier network, and the cathode of the third diode is connected with one end of the first resistor; the other end of the first resistor is connected with the positive electrode of the small-capacity energy storage element and the first input end of the power management unit; the positive electrode of the small-capacity energy storage element is connected with the other end of the first resistor, and the negative electrode of the small-capacity energy storage element is grounded; the power supply control unit is used for controlling the static power consumption of the energy storage circuit and controlling the driving unit, a first input end is connected with the other end of the first resistor, a second input end is connected with the ungrounded end of the energy storage element through a voltage division circuit, a power supply end is connected with the ungrounded end of the energy storage element and the cathode of the first diode through a fourth diode, and an output end is connected with one input end of the driving unit; the driving unit is used for adjusting the duty ratio of a switching tube in the DC-DC module according to the energy storage voltage, the energy provided by the loudspeaker and the control of the power supply control unit, and mainly comprises a first operational amplifier, a first comparator, a second comparator and an AND gate; the input end of the first operational amplifier is connected with the output end of the rectifying network and the ungrounded end of the energy storage element through a voltage division circuit, the other input end of the first operational amplifier is connected with a first reference voltage, and the output end of the first operational amplifier is connected with one input end of the first comparator; the other input end of the first comparator is a triangular wave signal, and the output end of the first comparator is connected with one input end of the AND gate; one input end of the second comparator is directly connected with the ungrounded end of the energy storage element, the other input end of the second comparator is connected with a second reference voltage, and an enabling signal at the output end of the second comparator is connected with the other input end of the AND gate; the output end of the AND gate is connected with the control end of the DC-DC module;
when the input end of the power supply control unit detects that the output of the rectifier network is 0, namely the loudspeaker has no energy and the audio system is turned off, the enabling signal is low, namely the driving unit is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122892980.9U CN216491018U (en) | 2021-11-24 | 2021-11-24 | Energy storage circuit for passive control of loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122892980.9U CN216491018U (en) | 2021-11-24 | 2021-11-24 | Energy storage circuit for passive control of loudspeaker |
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| Publication Number | Publication Date |
|---|---|
| CN216491018U true CN216491018U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122892980.9U Active CN216491018U (en) | 2021-11-24 | 2021-11-24 | Energy storage circuit for passive control of loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216491018U (en) |
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2021
- 2021-11-24 CN CN202122892980.9U patent/CN216491018U/en active Active
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