CN2710227Y - Electronic protective circuit device for loudspeaker - Google Patents
Electronic protective circuit device for loudspeaker Download PDFInfo
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- CN2710227Y CN2710227Y CN 200420034119 CN200420034119U CN2710227Y CN 2710227 Y CN2710227 Y CN 2710227Y CN 200420034119 CN200420034119 CN 200420034119 CN 200420034119 U CN200420034119 U CN 200420034119U CN 2710227 Y CN2710227 Y CN 2710227Y
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Abstract
The utility model relates to an electronic protective circuit device for a loudspeaker which is characterized in that the electronic protective circuit device for a loudspeaker comprises an acoustic frequency power input terminal, a LC frequency divider, a rectifying filter circuit, a bass protecting control circuit and an alt protecting control circuit. The utility model solves the deficiencies of safety measures of a loudspeaker unit in particular to the loudspeaker unit of a professional sound box. Adopting the utility model can have a quick reflecting speed, protect the loudspeaker unit effectively, prolong the service life of the loudspeaker, and improve the reliability of a sound system.
Description
Technical field
The utility model relates to a kind of loud speaker electronic protection circuit device, the practical especially loud speaker electronic protection circuit device of doing in the professional audio amplifier.
Background technology
In the prior art, the simple and easy protected mode of known loud speaker is to be connected in series a renewable type insurance resistance between high pitch loudspeaker unit and frequency divider loop.The characteristics of this mode are the current mode protections, need just can make the action of insurance resistance than the accumulation of macro-energy, and therefore reflection is more blunt; The safeguard measure that does not have the woofer unit simultaneously.Therefore, the unexpected damage of loudspeaker unit is quotidian thing, thereby has caused a lot of limitation for the use of audio amplifier.
Summary of the invention
The purpose of this utility model is intended to overcome in the above-mentioned prior art and solves the deficiency of the particularly professional audio amplifier of loudspeaker unit with the loudspeaker unit safety precautions, provide a kind of user of prolongation loud speaker useful life, improve the loud speaker electronic protection circuit device of the reliability of sound system.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of loud speaker electronic protection circuit device, and its feature part is: be made up of audio power input, LC frequency divider, current rectifying and wave filtering circuit, bass protection control circuit and high pitch protection control circuit; The audio power input divides two-way: the one tunnel connects the input port of LC frequency divider, and one the tunnel connects the input port of current rectifying and wave filtering circuit; The LC frequency divider divides four tunnel outputs again: the output of one tunnel (a) bass connects the input (IN1) of bass protection control circuit, one tunnel (b) connects the input (IN2) of bass protection control circuit, the output of one tunnel (c) high pitch connects the input (IN1) of high pitch protection control circuit, and one tunnel (d) connects the input (IN2) of high pitch protection control circuit; The output (OUT) of bass protection control circuit connects the woofer unit; The output (OUT) of high pitch protection control circuit connects the high pitch loudspeaker unit; The output of current rectifying and wave filtering circuit divides two-way: one tunnel output connects the input (IN3) of bass protection control circuit, and one tunnel output connects the input (IN3) of high pitch protection control circuit.
In the technical solution of the present utility model: described current rectifying and wave filtering circuit is made of current-limiting resistance R1, rectifier diode V1 and capacitor C 1; Current-limiting resistance R1 one ending connecting audio power input, the other end link to each other with rectifier diode V1 one end, and the rectifier diode V1 other end links to each other with capacitor C 1, and the other end of C1 links to each other with signal ground.
In the technical solution of the present utility model: described bass protection control circuit is by capacitor C 2, C3, C4, C5, resistance R 2, R3, R4, R5, R6, R7, R8, relay J Q1, diode V2, V3, V7, V8, V9, V10, triode V4, V5, V6, V11, V12 constitute; Capacitor C 3 one ends link to each other with the bass output (a) of LC frequency divider, the moving knife of while with the JQ1 of relay links to each other, and the other end of capacitor C 3 links to each other with an end of woofer, links to each other with the stationary knife (1) of relay J Q1 simultaneously; Resistance R 2 one ends link to each other, link to each other with diode V9 one end simultaneously with the bass output (b) of LC frequency divider, and resistance R 2 other ends link to each other with diode V2 one end; The V2 other end links to each other with voltage stabilizing didoe V3 one end, and the V3 other end links to each other with resistance R 3 one ends and links to each other with capacitor C 2 one ends; Capacitor C 2 other ends link to each other with the ground end; Resistance R 3 other ends link to each other with the base stage of triode V4; The emitter of V4 links to each other with ground, and V4 ground collector electrode links to each other with the base stage of triode V5 and links to each other with resistance R 4 one ends; The emitter of V5 links to each other with ground, and the collector electrode of V5 links to each other with voltage stabilizing didoe V7 one end and links to each other with resistance R 5 one ends and links to each other with the base stage of triode V6; Resistance R 4 other ends link to each other with the R5 other end, and link to each other with triode V6 collector electrode, link to each other with filter capacitor C1 one end simultaneously; The voltage stabilizing didoe V7 other end links to each other with ground; Triode V6 emitter links to each other with diode V8 one end, and links to each other with relay J Q1 coil one end; The diode V9 other end links to each other with voltage stabilizing didoe V10 one end; The V10 other end links to each other with filter capacitor C4 one end, and links to each other with resistance R 6 one ends; The C4 other end links to each other with ground; The R6 other end links to each other with resistance R 7 one ends, and links to each other with triode V11 base stage, and links to each other with triode V12 collector electrode; Resistance R 7 other ends link to each other with ground; Triode V11 emitter links to each other with ground; The V11 collector electrode links to each other with triode V12 base stage, and links to each other with resistance R 8 one ends, and links to each other with capacitor C 5 one ends; Triode V12 emitter links to each other with resistance R 8 other ends, and links to each other with capacitor C 5 other ends, and links to each other with the diode V8 other end, and links to each other with the relay J Q1 coil other end.
In the technical solution of the present utility model: described high pitch protection control circuit is by capacitor C 6, C7, C8, resistance R 9, R10, R11, R12, R13, R14, R15, R16, R17, relay J Q2, diode V13, V14, V18, V19, V20, V21, triode V15, V16, V17, V22, V23 constitute; Resistance R 16 1 ends link to each other, link to each other with the stationary knife (1) of relay J Q2 simultaneously with the high pitch output (c) of LC frequency divider, and the other end of resistance R 16 links to each other with an end of high pitch loudspeaker, links to each other with the moving knife of relay J Q2 simultaneously; Resistance R 9 one ends link to each other, link to each other with diode V20 one end simultaneously with the high pitch output (d) of LC frequency divider, and resistance R 9 other ends link to each other with diode V13 one end; The V13 other end links to each other with voltage stabilizing didoe V14 one end; The V14 other end links to each other with resistance R 10 1 ends and links to each other with capacitor C 6 one ends; Capacitor C 6 other ends link to each other with the ground end; Resistance R 10 other ends link to each other with the base stage of triode V15; The emitter of V15 links to each other with ground; The collector electrode of V15 links to each other with the base stage of triode V16, and links to each other with resistance R 11 1 ends; The emitter of V16 links to each other with ground, and the collector electrode of V16 links to each other with voltage stabilizing didoe V18 one end, and links to each other with resistance R 12 1 ends, and links to each other with the base stage of triode V17; Resistance R 11 other ends link to each other with the R12 other end, and link to each other with triode V17 collector electrode, link to each other with filter capacitor C1 one end simultaneously; The voltage stabilizing didoe V18 other end links to each other with ground; Triode V17 emitter links to each other with diode V18 one end, and links to each other with relay J Q2 coil one end; The diode V20 other end links to each other with voltage stabilizing didoe V21 one end; The V21 other end links to each other with filter capacitor C7 one end, and links to each other with resistance R 13 1 ends; The C7 other end links to each other with ground; The R13 other end links to each other with resistance R 14 1 ends, and links to each other with triode V22 base stage, and links to each other with triode V23 collector electrode; Resistance R 14 other ends link to each other with ground; Triode V22 emitter links to each other with ground; The V22 collector electrode links to each other with triode V23 base stage, and links to each other with resistance R 15 1 ends, and links to each other with capacitor C 8 one ends; Triode V23 emitter links to each other with resistance R 15 other ends, and links to each other with capacitor C 8 other ends, and links to each other with the diode V19 other end, and links to each other with the relay J Q2 coil other end; The stationary knife of relay J Q2 (2) links to each other with resistance R 17 1 ends; The R17 other end links to each other with ground.
In the technical solution of the present utility model: the capacitor C 1 in the described current rectifying and wave filtering circuit is the filtering storage capacitor.
In the technical solution of the present utility model: can have additional low pass circuit between described audio power input and the current rectifying and wave filtering circuit.
The utility model also can be protected the loudspeaker unit of three frequency division audio amplifier and sound column except the loudspeaker unit of two divided-frequency audio amplifier is protected; Also reach a kind of loud speaker electronic protection circuit that the utility model relates to and have infinite expanding.
Principle summary of the present utility model: when the audio power signal entered the LC frequency divider, the input port of current rectifying and wave filtering circuit was inserted on another road, and the direct voltage behind the rectifying and wave-filtering is as the operating voltage of high and low sound protection control circuit.The audio power signal obtains high pitch and bass signal behind LC dividing network frequency division, high pitch and bass signal one tunnel output to loudspeaker unit, and one the tunnel outputs to the triggering signal that high pitch and bass protection control circuit starts as protection.When the triggering signal of high pitch or bass protection control circuit meets or exceeds the triggering set point; high pitch or bass protection control circuit just start rapidly; allow high pitch or audio bass power signal through attenuation network; signal is done just to remove to drive loudspeaker unit after certain decay, thereby make high pitch or woofer unit obtain protection.When the triggering signal of high pitch or bass protection control circuit is lower than the triggering set point, be pass-through state between high pitch and audio bass power signal and the loud speaker, can not have any impact to tonequality and loudness.Determine startup, the recovery time of high pitch and bass protection control circuit by concrete setup parameter.
Compared with prior art, the utlity model has following characteristics:
(1) because the utility model loud speaker electronic protection circuit device has adopted the full analogue device electronic protection circuit of voltage triggered control type, therefore, can not cause excessive power loss to the power amplifier of output audio power, its response speed is fast, can in setting range, effectively protect the safety of loudspeaker unit, thereby greatly improved the useful life of loud speaker, and improved the reliability of sound system;
(2) simple in structure, practical.
Description of drawings
Fig. 1 is the utility model embodiment schematic block circuit diagram;
Fig. 2 is the utility model embodiment circuit theory diagrams.
Embodiment
Referring to accompanying drawing 1,2.
A kind of loud speaker electronic protection circuit device is made up of audio power input, LC frequency divider, current rectifying and wave filtering circuit, bass protection control circuit and high pitch protection control circuit; The audio power input divides two-way: the one tunnel connects the input port of LC frequency divider, and one the tunnel connects the input port of current rectifying and wave filtering circuit; The LC frequency divider divides four tunnel outputs again: the output of one road a bass meets the input IN1 of bass protection control circuit, one road b meets the input IN2 of bass protection control circuit, the output of one road c high pitch meets the input IN1 of high pitch protection control circuit, and one road d meets the input IN2 of high pitch protection control circuit; The output OUT of bass protection control circuit connects the woofer unit; The output OUT of high pitch protection control circuit connects the high pitch loudspeaker unit; The output of current rectifying and wave filtering circuit divides two-way: one tunnel output meets the input IN3 of bass protection control circuit, and one tunnel output meets the input IN3 of high pitch protection control circuit;
Described current rectifying and wave filtering circuit is made of current-limiting resistance R1, rectifier diode V1 and capacitor C 1; Current-limiting resistance R1 one ending connecting audio power input, the other end link to each other with rectifier diode V1 one end, and the rectifier diode V1 other end links to each other with capacitor C 1, and the other end of C1 links to each other with signal ground;
Described bass protects control circuit by capacitor C 2, C3, C4, C5, resistance R 2, R3, R4, R5, R6, R7, R8, and relay J Q1, diode V2, V3, V7, V8, V9, V10, triode V4, V5, V6, V11, V12 constitute; Capacitor C 3 one ends link to each other with the bass output a of LC frequency divider, the moving knife of while with the JQ1 of relay links to each other, and the other end of capacitor C 3 links to each other with an end of woofer, links to each other with the stationary knife 1 of relay J Q1 simultaneously; Resistance R 2 one ends link to each other, link to each other with diode V9 one end simultaneously with the bass output b of LC frequency divider, and resistance R 2 other ends link to each other with diode V2 one end; The V2 other end links to each other with voltage stabilizing didoe V3 one end, and the V3 other end links to each other with resistance R 3 one ends and links to each other with capacitor C 2 one ends; Capacitor C 2 other ends link to each other with the ground end; Resistance R 3 other ends link to each other with the base stage of triode V4; The emitter of V4 links to each other with ground, and V4 ground collector electrode links to each other with the base stage of triode V5 and links to each other with resistance R 4 one ends; The emitter of V5 links to each other with ground, and the collector electrode of V5 links to each other with voltage stabilizing didoe V7 one end and links to each other with resistance R 5 one ends and links to each other with the base stage of triode V6; Resistance R 4 other ends link to each other with the R5 other end, and link to each other with triode V6 collector electrode, link to each other with filter capacitor C1 one end simultaneously; The voltage stabilizing didoe V7 other end links to each other with ground; Triode V6 emitter links to each other with diode V8 one end, and links to each other with relay J Q1 coil one end; The diode V9 other end links to each other with voltage stabilizing didoe V10 one end; The V10 other end links to each other with filter capacitor C4 one end, and links to each other with resistance R 6 one ends; The C4 other end links to each other with ground; The R6 other end links to each other with resistance R 7 one ends, and links to each other with triode V11 base stage, and links to each other with triode V12 collector electrode; Resistance R 7 other ends link to each other with ground; Triode V11 emitter links to each other with ground; The V11 collector electrode links to each other with triode V12 base stage, and links to each other with resistance R 8 one ends, and links to each other with capacitor C 5 one ends; Triode V12 emitter links to each other with resistance R 8 other ends, and links to each other with capacitor C 5 other ends, and links to each other with the diode V8 other end, and links to each other with the relay J Q1 coil other end;
Described high pitch protection control circuit is by capacitor C 6, C7, C8, resistance R 9, R10, R11, R12, R13, R14, R15, R16, R17, relay J Q2, diode V13, V14, V18, V19, V20, V21, triode V15, V16, V17, V22, V23 constitute; Resistance R 16 1 ends link to each other, link to each other with the stationary knife 1 of relay J Q2 simultaneously with the high pitch output c of LC frequency divider, and the other end of resistance R 16 links to each other with an end of high pitch loudspeaker, links to each other with the moving knife of relay J Q2 simultaneously; Resistance R 9 one ends link to each other, link to each other with diode V20 one end simultaneously with the high pitch output d of LC frequency divider, and resistance R 9 other ends link to each other with diode V13 one end; The V13 other end links to each other with voltage stabilizing didoe V14 one end; The V14 other end links to each other with resistance R 10 1 ends and links to each other with capacitor C 6 one ends; Capacitor C 6 other ends link to each other with the ground end; Resistance R 10 other ends link to each other with the base stage of triode V15; The emitter of V15 links to each other with ground; The collector electrode of V15 links to each other with the base stage of triode V16, and links to each other with resistance R 11 1 ends; The emitter of V16 links to each other with ground, and the collector electrode of V16 links to each other with voltage stabilizing didoe V18 one end, and links to each other with resistance R 12 1 ends, and links to each other with the base stage of triode V17; Resistance R 11 other ends link to each other with the R12 other end, and link to each other with triode V17 collector electrode, link to each other with filter capacitor C1 one end simultaneously; The voltage stabilizing didoe V18 other end links to each other with ground; Triode V17 emitter links to each other with diode V18 one end, and links to each other with relay J Q2 coil one end; The diode V20 other end links to each other with voltage stabilizing didoe V21 one end; The V21 other end links to each other with filter capacitor C7 one end, and links to each other with resistance R 13 1 ends; The C7 other end links to each other with ground; The R13 other end links to each other with resistance R 14 1 ends, and links to each other with triode V22 base stage, and links to each other with triode V23 collector electrode; Resistance R 14 other ends link to each other with ground; Triode V22 emitter links to each other with ground; The V22 collector electrode links to each other with triode V23 base stage, and links to each other with resistance R 15 1 ends, and links to each other with capacitor C 8 one ends; Triode V23 emitter links to each other with resistance R 15 other ends, and links to each other with capacitor C 8 other ends, and links to each other with the diode V19 other end, and links to each other with the relay J Q2 coil other end; The stationary knife 2 of relay J Q2 links to each other with resistance R 17 1 ends; The R17 other end links to each other with ground.
Among this embodiment, the triggering signal of protection control circuit is taken from the audio signal after LC dividing network frequency division.Protection to loudspeaker unit is to be realized by a kind of attenuation network of relay J Q1, JQ2 control; The control circuit decision that the operating voltage of relay J Q1 is made up of triode V4, V5, V6, V7 and peripheral Resistor-Capacitor Unit, the control circuit decision that electrical equipment JQ2 operating voltage is made up of triode V15, V16, V17, V18 and peripheral Resistor-Capacitor Unit; V9, V10, C4, R6, R7, V11, V12, R8, C5 form the circuits for triggering of relay J Q1, and V20, V21, C7, R13, R14, V22, V23, R15, C8 form the circuits for triggering of relay J Q2.In this step, triode V4, V5, V6, V15, V16, V17 can be realized by the positive-negative-positive triode.The startup of bass protection control circuit, recovery time, the startup of high pitch protection control circuit, recovery time were by R9, C6, V14, V21 decision by R2, C3, V2, V10 decision.
Operation principle: when (1) entered the LC frequency divider when the audio power signal, the input port of current rectifying and wave filtering circuit was inserted on another road, and the direct voltage behind the rectifying and wave-filtering is as height. the operating voltage of bass protection control circuit; (2) the audio power signal obtains high pitch and bass signal behind LC dividing network frequency division, and high pitch and bass signal one tunnel output to loudspeaker unit, and one the tunnel outputs to the triggering signal that high pitch and bass protection control circuit starts as protection; (3) when the triggering signal of high pitch or bass protection control circuit meets or exceeds the triggering set point; high pitch or bass protection control circuit just start rapidly; allow high pitch or audio bass power signal through attenuation network; signal is done just to remove to drive loudspeaker unit after certain decay, thereby make high pitch or woofer unit obtain protection.When the triggering signal of high pitch or bass protection control circuit is lower than the triggering set point, be pass-through state between high pitch and audio bass power signal and the loud speaker, can not have any impact to tonequality and loudness; (4) determine startup, the recovery time of high pitch and bass protection control circuit by concrete setup parameter.
The utility model is not limited to this embodiment, and the utility model content is described all can be implemented, and has described good result.
Claims (6)
1, a kind of loud speaker electronic protection circuit device is characterized in that: be made up of audio power input, LC frequency divider, current rectifying and wave filtering circuit, bass protection control circuit and high pitch protection control circuit; The audio power input divides two-way: the one tunnel connects the input port of LC frequency divider, and one the tunnel connects the input port of current rectifying and wave filtering circuit; The LC frequency divider divides four tunnel outputs again: the output of one tunnel (a) bass connects the input (IN1) of bass protection control circuit, one tunnel (b) connects the input (IN2) of bass protection control circuit, the output of one tunnel (c) high pitch connects the input (IN1) of high pitch protection control circuit, and one tunnel (d) connects the input (IN2) of high pitch protection control circuit; The output (OUT) of bass protection control circuit connects the woofer unit; The output (OUT) of high pitch protection control circuit connects the high pitch loudspeaker unit; The output of current rectifying and wave filtering circuit divides two-way: one tunnel output connects the input (IN3) of bass protection control circuit, and one tunnel output connects the input (IN3) of high pitch protection control circuit.
2, by the described loud speaker electronic protection circuit of claim 1 device, it is characterized in that: described current rectifying and wave filtering circuit is made of current-limiting resistance R1, rectifier diode V1 and capacitor C 1; Current-limiting resistance R1 one ending connecting audio power input, the other end link to each other with rectifier diode V1 one end, and the rectifier diode V1 other end links to each other with capacitor C 1, and the other end of C1 links to each other with signal ground.
3, by the described loud speaker electronic protection circuit of claim 1 device, it is characterized in that: described bass protection control circuit is by capacitor C 2, C3, C4, C5, resistance R 2, R3, R4, R5, R6, R7, R8, relay J Q1, diode V2, V3, V7, V8, V9, V10, triode V4, V5, V6, V11, V12 constitute; Capacitor C 3 one ends link to each other with the bass output (a) of LC frequency divider, the moving knife of while with the JQ1 of relay links to each other, and the other end of capacitor C 3 links to each other with an end of woofer, links to each other with the stationary knife (1) of relay J Q1 simultaneously; Resistance R 2 one ends link to each other, link to each other with diode V9 one end simultaneously with the bass output (b) of LC frequency divider, and resistance R 2 other ends link to each other with diode V2 one end; The V2 other end links to each other with voltage stabilizing didoe V3 one end, and the V3 other end links to each other with resistance R 3 one ends and links to each other with capacitor C 2 one ends; Capacitor C 2 other ends link to each other with the ground end; Resistance R 3 other ends link to each other with the base stage of triode V4; The emitter of V4 links to each other with ground, and V4 ground collector electrode links to each other with the base stage of triode V5 and links to each other with resistance R 4 one ends; The emitter of V5 links to each other with ground, and the collector electrode of V5 links to each other with voltage stabilizing didoe V7 one end and links to each other with resistance R 5 one ends and links to each other with the base stage of triode V6; Resistance R 4 other ends link to each other with the R5 other end, and link to each other with triode V6 collector electrode, link to each other with filter capacitor C1 one end simultaneously; The voltage stabilizing didoe V7 other end links to each other with ground; Triode V6 emitter links to each other with diode V8 one end, and links to each other with relay J Q1 coil one end; The diode V9 other end links to each other with voltage stabilizing didoe V10 one end; The V10 other end links to each other with filter capacitor C4 one end, and links to each other with resistance R 6 one ends; The C4 other end links to each other with ground; The R6 other end links to each other with resistance R 7 one ends, and links to each other with triode V11 base stage, and links to each other with triode V12 collector electrode; Resistance R 7 other ends link to each other with ground; Triode V11 emitter links to each other with ground; The V11 collector electrode links to each other with triode V12 base stage, and links to each other with resistance R 8 one ends, and links to each other with capacitor C 5 one ends; Triode V12 emitter links to each other with resistance R 8 other ends, and links to each other with capacitor C 5 other ends, and links to each other with the diode V8 other end, and links to each other with the relay J Q1 coil other end.
4, by the described loud speaker electronic protection circuit of claim 1 device, it is characterized in that: described high pitch protection control circuit is by capacitor C 6, C7, C8, resistance R 9, R10, R11, R12, R13, R14, R15, R16, R17, relay J Q2, diode V13, V14, V18, V19, V20, V21, triode V15, V16, V17, V22, V23 constitute; Resistance R 16 1 ends link to each other, link to each other with the stationary knife (1) of relay J Q2 simultaneously with the high pitch output (c) of LC frequency divider, and the other end of resistance R 16 links to each other with an end of high pitch loudspeaker, links to each other with the moving knife of relay J Q2 simultaneously; Resistance R 9 one ends link to each other, link to each other with diode V20 one end simultaneously with the high pitch output (d) of LC frequency divider, and resistance R 9 other ends link to each other with diode V13 one end; The V13 other end links to each other with voltage stabilizing didoe V14 one end; The V14 other end links to each other with resistance R 10 1 ends and links to each other with capacitor C 6 one ends; Capacitor C 6 other ends link to each other with the ground end; Resistance R 10 other ends link to each other with the base stage of triode V15; The emitter of V15 links to each other with ground; The collector electrode of V15 links to each other with the base stage of triode V16, and links to each other with resistance R 11 1 ends; The emitter of V16 links to each other with ground, and the collector electrode of V16 links to each other with voltage stabilizing didoe V18 one end, and links to each other with resistance R 12 1 ends, and links to each other with the base stage of triode V17; Resistance R 11 other ends link to each other with the R12 other end, and link to each other with triode V17 collector electrode, link to each other with filter capacitor C1 one end simultaneously; The voltage stabilizing didoe V18 other end links to each other with ground; Triode V17 emitter links to each other with diode V18 one end, and links to each other with relay J Q2 coil one end; The diode V20 other end links to each other with voltage stabilizing didoe V21 one end; The V21 other end links to each other with filter capacitor C7 one end, and links to each other with resistance R 13 1 ends; The C7 other end links to each other with ground; The R13 other end links to each other with resistance R 14 1 ends, and links to each other with triode V22 base stage, and links to each other with triode V23 collector electrode; Resistance R 14 other ends link to each other with ground; Triode V22 emitter links to each other with ground; The V22 collector electrode links to each other with triode V23 base stage, and links to each other with resistance R 15 1 ends, and links to each other with capacitor C 8 one ends; Triode V23 emitter links to each other with resistance R 15 other ends, and links to each other with capacitor C 8 other ends, and links to each other with the diode V19 other end, and links to each other with the relay J Q2 coil other end; The stationary knife of relay J Q2 (2) links to each other with resistance R 17 1 ends; The R17 other end links to each other with ground.
5, by the described loud speaker electronic protection circuit of claim 2 device, it is characterized in that: the capacitor C 1 in the described current rectifying and wave filtering circuit is the filtering storage capacitor.
6, by the described loud speaker electronic protection circuit of claim device, it is characterized in that: between described audio power input and the current rectifying and wave filtering circuit low pass circuit is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034119 CN2710227Y (en) | 2004-06-17 | 2004-06-17 | Electronic protective circuit device for loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034119 CN2710227Y (en) | 2004-06-17 | 2004-06-17 | Electronic protective circuit device for loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2710227Y true CN2710227Y (en) | 2005-07-13 |
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ID=34850149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420034119 Expired - Fee Related CN2710227Y (en) | 2004-06-17 | 2004-06-17 | Electronic protective circuit device for loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2710227Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959100A (en) * | 2010-05-25 | 2011-01-26 | 瑞声声学科技(深圳)有限公司 | Protective circuit for voice frequency circuit system and voice frequency circuit system using same |
-
2004
- 2004-06-17 CN CN 200420034119 patent/CN2710227Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959100A (en) * | 2010-05-25 | 2011-01-26 | 瑞声声学科技(深圳)有限公司 | Protective circuit for voice frequency circuit system and voice frequency circuit system using same |
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