CN109862467A - A kind of power amplifier and sound equipment applied to sound equipment - Google Patents
A kind of power amplifier and sound equipment applied to sound equipment Download PDFInfo
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- CN109862467A CN109862467A CN201711235662.7A CN201711235662A CN109862467A CN 109862467 A CN109862467 A CN 109862467A CN 201711235662 A CN201711235662 A CN 201711235662A CN 109862467 A CN109862467 A CN 109862467A
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Abstract
The present invention provides a kind of power amplifiers and sound equipment applied to sound equipment, the power amplifier includes: power end, time delay module and power amplifier module: the input terminal of the time delay module is connect with the power end, and the output end of the time delay module is connect with the input terminal of the power amplifier module；Wherein, the time delay module includes charhing unit and switch element, the time delay module is exported when the switch element is in the conductive state is less than the threshold voltage that the power amplifier module powers on, and the time delay module exports the threshold voltage powered on not less than the power amplifier module when the switch element is in off state.The present invention can realize the power-on delay to power amplifier module by time delay module when power end powers on, so as to effectively inhibit power end in the booting impulsive sound that powered on moment electric current leads directly to power amplifier module and generates, and damage of the power end powered on moment to power amplifier can be reduced.
Description
Technical field
The invention belongs to sound technique field more particularly to a kind of power amplifiers and sound equipment applied to sound equipment.
Background technique
Power amplification is realized using power amplifier in the acoustic system, but booting moment (i.e. to power supply electrifying) meeting is so that before power amplifier
The DC voltage at end generates electric current and leads directly to power amplifier to generate booting impulsive sound, and the bigger booting impulsive sound of DC voltage is also more
Greatly.
Control is switched on impulsive sound with the following method in sound technique field at present: in power supply electrifying, first opening sound
Loud mute function is powered on to power amplifier again.However, the method is only applicable to the product design of small-power (5W or less), and only drop
It is low and really inhibits booting impulsive sound.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of power amplifiers and sound equipment applied to sound equipment, in power supply electrifying
Shi Yanchi power amplifier powers on, and solves the problems, such as the booting impulsive sound that when powering on electric current leads directly to power amplifier and generates.
The first aspect of the embodiment of the present invention provides a kind of power amplifier applied to sound equipment, including power end, delay
Module and power amplifier module:
The input terminal of the time delay module is connect with the power end, the output end of the time delay module and the power amplifier mould
The input terminal of block connects；
Wherein, the time delay module includes charhing unit and switch element, and the time delay module is at the switch element
The first DC voltage is exported when on state, the time delay module exports second when the switch element is in off state
DC voltage；
Wherein, the switch element is in the conductive state when the charhing unit powers on, and the switch element is in institute
In off state when stating charhing unit charging complete, and in the charging process of the charhing unit, the switch element
The voltage swing of control terminal and the charging time of the charhing unit are negatively correlated；
First DC voltage is less than the threshold voltage that the power amplifier module powers on；
Second DC voltage is not less than the threshold voltage that the power amplifier module powers on.
Based on first aspect present invention, in the first possible implementation, the charhing unit includes capacitor and
One resistance:
The first end of the capacitor is connect with the power end, the second end of the capacitor respectively with the first resistor
First end is connected with the control terminal of the switch element, and the output end of the second end of the first resistor and the switch element is total
It is connected to ground；
Wherein, the voltage that the second end of the capacitor is exported when the capacitor starts to charge is not less than the switch element
The threshold voltage of conducting, the voltage that the second end of the capacitor is exported when the capacitor is completed and charged are less than the switch element
The threshold voltage of conducting.
The first implementation based on first aspect present invention is realized in possible implementation at second, described
Time delay module further includes second resistance:
The first end of the second resistance is connect with the power end, and the second end of the second resistance is opened with described respectively
The input terminal for closing element is connected with the input terminal of the power amplifier module.
Second of implementation based on first aspect present invention, it is described in the third possible implementation of realization
Time delay module further includes 3rd resistor, the first end of the 3rd resistor respectively with the input terminal of the switch element and described
The second end of two resistance connects, and the second end of the 3rd resistor is connect with the input terminal of the power amplifier module.
Based on first aspect present invention perhaps the first implementation of above-mentioned first aspect or above-mentioned first aspect
Second of implementation or above-mentioned first aspect the third implementation, in the 4th kind of implementation, the switch
Element is NMOS tube, and control terminal, input terminal and the output end of the switch element are respectively the grid of the NMOS tube, drain electrode
And source electrode.
Based on first aspect present invention perhaps the first implementation of above-mentioned first aspect or above-mentioned first aspect
Second of implementation or above-mentioned first aspect the third implementation, in the 5th kind of implementation, the power amplifier
The input terminal of module includes the first input pin and the second input pin.
The 5th kind of implementation based on first aspect present invention, in the 6th kind of implementation, the power amplifier module are as follows:
The power amplifier chips of model TPA3116D2-Q1.
The 6th kind of implementation based on first aspect present invention, in the 7th kind of possible implementation, the power amplifier core
Piece includes SDZ pin and FAULTZ pin, and the SDZ pin is first input pin, and the FAULTZ pin is described
Second input pin.
Based on first aspect present invention, in the 8th kind of possible implementation, the power amplifier further include:
Mode selection module, the first signal input module, power limitation module, gain module, second signal input module,
Mute module, amplitude modulation module, external sync module, power module, the first signal output module and second signal output module；
The mode selection module, first signal input module, the power limitation module, the gain module,
The second signal input module, the mute module, the amplitude modulation module, the external sync module, the power module,
First signal output module and the second signal output module are connected to the power amplifier module altogether.
The second aspect of the embodiment of the present invention provides a kind of sound equipment, including such as above-mentioned first aspect or above-mentioned first party
The power amplifier referred in any possible implementation in face.
Existing beneficial effect is the embodiment of the present invention compared with prior art: in the technical solution of the present invention, above-mentioned function
Electric discharge road includes: power end, time delay module and power amplifier module, and the input terminal of the time delay module is connect with the power end, institute
The output end for stating time delay module is connect with the input terminal of the power amplifier module；Wherein, the time delay module include charhing unit and
Switch element, when power end powers on, charhing unit is started to charge, at this time switching elements conductive, so that above-mentioned power amplifier module is defeated
The DC voltage for entering end is less than the threshold voltage that above-mentioned power amplifier module powers on, so that the power amplifier module is in not power-up state
(i.e. shutdown state)；With charging charhing unit so that the voltage of switch element control terminal slowly declines, when switch member
Switch element ends when the voltage of part control terminal is lower than switching elements conductive voltage, so that the input terminal of above-mentioned power amplifier module is straight
Galvanic electricity pressure is not less than the threshold voltage that above-mentioned power amplifier module powers on, so that the power amplifier module is in power-up state.Therefore pass through
Above-mentioned time delay module can realize the power-on delay to power amplifier module when power end powers on, so as to effectively inhibit power end
In the booting impulsive sound that powered on moment electric current leads directly to power amplifier module and generates, and power end powered on moment can be reduced to power amplifier electricity
The damage on road.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structural block diagram of power amplifier provided in an embodiment of the present invention；
Fig. 2-a is a kind of electronic component exemplary diagram of power amplifier provided in an embodiment of the present invention；
Fig. 2-b is the electronic component exemplary diagram of another power amplifier provided in an embodiment of the present invention；
Fig. 3 is the exemplary diagram of another power amplifier provided in an embodiment of the present invention；
Fig. 4 is a kind of sound equipment exemplary diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that term " includes " and their any changes in description and claims of this specification
Shape, it is intended that cover and non-exclusive include.Such as process, method comprising a series of steps or units or system, product or
Equipment is not limited to listed step or unit, but optionally further comprising the step of not listing or unit or optional
Ground further includes the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " the
Two " and " third " etc. are for distinguishing different objects, not for description particular order.In order to illustrate technology of the present invention
Scheme, the following is a description of specific embodiments.
Embodiment one
Fig. 1 is a kind of structural block diagram of power amplifier provided in an embodiment of the present invention；For ease of description, illustrate only with
The relevant part of the present embodiment, the power amplifier in the embodiment of the present invention includes: power end 101, time delay module as shown in Figure 1:
102 and power amplifier module 103: the input terminal of above-mentioned time delay module 102 is connect with above-mentioned power end 101, above-mentioned time delay module 102
Output end is connect with the input terminal of power amplifier module 103；
Wherein, above-mentioned time delay module 102 includes charhing unit 1021 and switch element 1022, and above-mentioned time delay module 102 exists
Switch element 1022 exports the first DC voltage when in the conductive state, time delay module 102 is in cut-off in switch element 1022
The second DC voltage is exported when state；
Wherein, switch element 1022 is in the conductive state when the charhing unit 1021 powers on, and the switch element
1022 are in off state in 1021 charging complete of charhing unit, and in the charging process of the charhing unit 1021
In, the voltage swing of the control terminal of the switch element 1022 and the charging time of the charhing unit 1021 are negatively correlated,
That is, in the charging process of charhing unit 1021, with the increase in the charging time of charhing unit 1021, switch element 1022
The voltage swing of control terminal is smaller and smaller.
Above-mentioned first DC voltage is less than the threshold voltage that the power amplifier module 103 powers on；
Above-mentioned second DC voltage is not less than the threshold voltage that the power amplifier module 103 powers on.
When above-mentioned power end 101 powers in the present embodiment, the charging list in time delay module 102 that is connect with power end 101
Member 1021 starts to charge, and the switch element 1022 in time delay module 102 is in the conductive state at this time, so that with time delay module 102
The DC voltage of the input terminal of the power amplifier module 103 of output end connection is less than the threshold voltage that power amplifier module powers on, thus power amplifier
Module 103 is in not power-up state (i.e. shutdown state), charges with to charhing unit 1021 so that switch element 1022
The voltage of control terminal slowly declines, and switchs when the voltage of 1022 control terminal of switch element is lower than 1022 conducting voltage of switch element
Element cut-off, so that the DC voltage of the input terminal of above-mentioned power amplifier module 103 is not less than the thresholding that above-mentioned power amplifier module 103 powers on
Voltage, so that the power amplifier module 103 is in power-up state.It therefore can be on power end 101 by above-mentioned time delay module 102
The power-on delay to power amplifier module 103 is realized when electric, so as to effectively inhibit power end 101 to lead directly to function in powered on moment electric current
Amplification module 102 and the booting impulsive sound generated, and can reduce damage of 101 powered on moment of power end to power amplifier.
Embodiment two
Fig. 2-a is a kind of electronic component exemplary diagram of power amplifier provided in an embodiment of the present invention, for ease of description,
Only the parts related to this embodiment are shown, as shown in Fig. 2-a: the power amplifier in the embodiment of the present invention includes power end
101, time delay module 102 and power amplifier module 103: above-mentioned time delay module 102 includes charhing unit 1021, switch element 1022 and the
Two resistance R132, above-mentioned charhing unit 1021 includes capacitor C148 and first resistor R131, above-mentioned switch element 1022 are preferably
NMOS tube Q11 (in other embodiments, switch element 1022 or other switching tubes), and the control terminal of NMOS tube Q11,
Input terminal and output end are respectively grid, drain electrode and the source electrode of NMOS tube Q11；Above-mentioned power amplifier module 103 is model
(in other embodiments, power amplifier module can also be by the power amplifier chips structure of other signals for the power amplifier chips of TPA3116D2-Q1
Build), the input terminal of above-mentioned power amplifier chips includes the first input pin and the second input pin, and above-mentioned first input pin is power amplifier
The SDZ pin of chip, above-mentioned second input pin are FAULTZ pin (in other embodiments, the power amplifier chips of power amplifier chips
Input terminal can also only include an input pin, can specifically be set according to the concrete model of selected power amplifier chips).
In the present embodiment, the first end of above-mentioned capacitor C148 is connect with power end 101, the second end difference of capacitor C148
It is connect with the control terminal of the first end of first resistor R131 and switch element 1022, the second end and switch member of first resistor R131
The output end of part 1022 is connected to ground altogether；The first end of above-mentioned second resistance R132 is connect with power end 101, second resistance R132's
Second end is connect with the input terminal of switch element 1022, and the second end of second resistance R132 respectively with above-mentioned power amplifier chips
FAULTZ pin is connected with SDZ pin.
In the present embodiment, to 101 powered on moment of power end (such as voltage of upper 17V) to capacitor C148 and first resistor
R131 charging, the control terminal of NMOS tube Q11 can control NMOS tube Q11 in the conductive state at this time for conducting voltage, so that
The input terminal and output end of NMOS tube Q11 are connected, thus power supply electrifying immediate current can through second resistance R132 through to
The output end of NMOS tube Q11, so that with the SDZ pin of the second resistance R132 power amplifier chips connecting and FAULTZ pin
Voltage is pulled down to the threshold voltage powered on less than power amplifier chips, and power amplifier chips are in not power-up state (i.e. shutdown at this time
State)；With to capacitor C148 charge so that the voltage (i.e. the voltage of NMOS tube Q11 control terminal) of capacitor C148 second end slowly
Decline can control at NMOS tube Q11 when the voltage of NMOS tube Q11 control terminal drops below the conducting voltage of NMOS tube Q11
In off state, so that the input terminal of NMOS tube Q11 and output end disconnect, electric current can lead directly to power amplifier through second resistance R132
The SDZ pin and FAULTZ pin of chip so that the SDZ pin of power amplifier chips and the voltage of FAULTZ pin be pulled high to it is not small
In the threshold voltage that power amplifier chips power on, power amplifier chips normal operating conditions at this time.
In the present embodiment, when the SDZ pin input voltage of power amplifier chips is less than the threshold voltage that power amplifier chips power on,
Above-mentioned power amplifier chips are in high resistant working condition, i.e., the signal input pin of above-mentioned power amplifier chips is presented high-impedance state, does not acquire
Input signal；When the FAULTZ pin input voltage of power amplifier chips is less than the threshold voltage that power amplifier chips power on, above-mentioned power amplifier
Chip is in fail operation state, i.e., the signal output pin of above-mentioned power amplifier chips not output signal；When the SDZ of power amplifier chips draws
When foot and FAULTZ pin input voltage are both less than the threshold voltage that power amplifier chips power on, above-mentioned power amplifier chips are in and do not power on shape
The input pin of state (i.e. shutdown state) namely above-mentioned power amplifier chips does not acquire input signal, above-mentioned power amplifier chips it is defeated
Pin not output signal out；When the SDZ pin and FAULTZ pin input voltage of power amplifier chips are not less than on the power amplifier module
When the threshold voltage of electricity, above-mentioned power amplifier module is in normal operating conditions.
Alternatively, the electronic component composition of time delay module 102 can be as shown in Fig. 2-b.Fig. 2-b is the embodiment of the present invention
The electronic component exemplary diagram of another power amplifier of offer, the electronic component being described in detail in above-mentioned Fig. 2-a with
Module, details are not described herein again.Optionally, above-mentioned time delay module 102 further includes 3rd resistor R62, and the of the 3rd resistor R62
One end is connect with the second end of the input terminal of the switch element 102 and the second resistance R132 respectively, and third electricity
The second end of resistance R62 is connect with the SDZ pin of above-mentioned power amplifier chips and FAULTZ pin respectively.
It can be seen that since NMOS transistor conduction reaction is fast (the small conducting of source electrode and drain electrode pressure drop is fast), powered on moment by pair
The conduction of capacitor C148 and first resistor R131 charge control NMOS tube Q11, and capacitor C148 and first resistor R131 value
Size can control NMOS tube Q11 turn-on time, for example, capacitor C148 and the first resistor R131 value bigger charging time it is longer, thus
NMOS tube Q11 turn-on time is longer.As 101 powered on moment of power end, grid of the electric current through to NMOS tube Q11, NMOS tube Q11
Conducting, the SDZ pin of such power amplifier chips and the voltage of FAULTZ pin are pulled low, so that power amplifier chips are in not power-up state
(i.e. shutdown state)；With charging to capacitor C148, the grid voltage of NMOS tube Q11 slowly declines, when grid voltage is low
When the conducting voltage of NMOS tube Q11, NMOS tube Q11 cut-off, the SDZ pin of power amplifier chips and the voltage of FAULTZ pin are drawn
Height just works normally to power amplifier chips, realizes when power end 101 powers on (realize to the power-on delay of power amplifier chips in this way
Powered on after power amplifier chips shutdow), so as to effectively inhibit power end 101 powered on moment electric current lead directly to power amplifier chips and
The booting impulsive sound of generation, and damage of 101 powered on moment of power end to power amplifier can be reduced, and circuit is simple, cost
It is low.
Embodiment three
Fig. 3 is a kind of exemplary diagram of power amplifier provided in an embodiment of the present invention, for ease of description, is illustrated only and this
The relevant part of embodiment, as shown in figure 3, a kind of power amplifier provided in an embodiment of the present invention includes power amplifier 10, it is described
Part identical with embodiment one and embodiment two is not repeating herein in power amplifier 10, and optional above-mentioned power amplifier 10 is also
It include: mode selection module 104, the first signal input module 105, power limitation module 106, gain module 107, second signal
Input module 108, mute module 109, amplitude modulation module 110, external sync module 111, power module 1121, the output of the first signal
Module 113 and second signal output module 114, power module 1122.
In the present embodiment, above-mentioned mode selection module 104 is connect with the MODSEL pin of above-mentioned power amplifier module 103, on
It states the first signal input module 105 to connect with the INPR pin of above-mentioned power amplifier module 103 and INNR pin respectively, above-mentioned power limit
Molding block 106 is connect with the PLIMIT pin of above-mentioned power amplifier module, above-mentioned gain module 107 and above-mentioned power amplifier module 103
GAIN/SLVl pin connection, above-mentioned second signal input module 108 respectively with the INPL pin of above-mentioned power amplifier module 103 and
The connection of INNL pin, above-mentioned mute module 109 are connect with the MUTE pin of above-mentioned power amplifier module 103, and above-mentioned amplitude modulation module 110 is divided
It is not connect with the AM2 pin of above-mentioned power amplifier module 103, AM1 pin and AM0 pin, said external synchronization module 111 and above-mentioned function
The SYNC pin of amplification module 103 connects, and above-mentioned power module 1121 is connect with the PVCC pin of above-mentioned power amplifier module 103, above-mentioned
Power module 1122 is connect with the PVCC pin of above-mentioned power amplifier module 103 and AVCC pin, above-mentioned first signal output module 113
It is connect respectively with the BSPR pin of above-mentioned power amplifier module 103, OUTPER pin, OUTNR pin and BSNR pin, above-mentioned second letter
Number output module 114 connects with the BSPL pin of above-mentioned power amplifier module 103, OUTPL pin, OUTNL pin and BSNL pin respectively
It connects.Above-mentioned power amplifier module 103 is the power amplifier chips of model TPA3116D2-Q1, pin corresponding to above-mentioned power amplifier module 103
Pin corresponding to power amplifier chips for model TPA3116D2-Q1, certainly, in other embodiments, power amplifier module can also be with
It is constructed by the power amplifier chips of other signals, corresponding pin is also possible to the pin of other signals, herein without limitation.
It can be seen that when above-mentioned power end 101 powers on, the charhing unit in time delay module 102 that is connect with power end 101
1021 start to charge, and the switch element 1022 in time delay module 102 is in the conductive state at this time, so that defeated with time delay module 102
The DC voltage of the input terminal of the power amplifier module 103 of outlet connection is less than the threshold voltage that power amplifier module 103 powers on, thus power amplifier
Module 103 is in not power-up state (i.e. shutdown state), charges with to charhing unit 1021 so that switch element 1022
The voltage of control terminal slowly declines, and switchs when the voltage of 1022 control terminal of switch element is lower than 1022 conducting voltage of switch element
Element cut-off, so that the DC voltage of the input terminal of above-mentioned power amplifier module 103 is not less than the thresholding that above-mentioned power amplifier module 103 powers on
Voltage, so that the power amplifier module 103 is in power-up state.It therefore can be on power end 101 by above-mentioned time delay module 102
The power-on delay to power amplifier module 103 is realized when electric, so as to effectively inhibit power end 101 to lead directly to function in powered on moment electric current
Amplification module 102 and the booting impulsive sound generated, and can reduce damage of 101 powered on moment of power end to power amplifier, and prolong
When modular circuit it is simple, it is at low cost.
Example IV
The embodiment of the present invention also provides a kind of sound equipment, and the sound equipment may include any function of above-described embodiment one to three
Electric discharge road.
Fig. 4 is a kind of sound equipment exemplary diagram provided in an embodiment of the present invention, for ease of description, is illustrated only and the present embodiment
Relevant part, as shown in figure 4, a kind of sound equipment provided in an embodiment of the present invention includes power amplifier 10, the power amplifier 10
In part identical with embodiment one, embodiment two and embodiment three do not repeating herein, optionally, above-mentioned power amplifier 10 wraps
It includes: power end 101, time delay module 102, power amplifier module 103, mode selection module 104, the first signal input module 105, power
Limit module 106, gain module 107, second signal input module 108, mute module 109, amplitude modulation module 110, external sync
Module 111, power module 1121, the first signal output module 113 and second signal output module 114, power module 1122.
In the present embodiment, above-mentioned time delay module 102 is connect with above-mentioned power end 101, above-mentioned time delay module respectively with function
The FAULTZ pin of amplification module 103 is connected with SDZ pin, above-mentioned mode selection module 104 and above-mentioned power amplifier module 103
The connection of MODSEL pin, above-mentioned first signal input module 105 are drawn with the INPR pin of above-mentioned power amplifier module 103 and INNR respectively
Foot connection, above-mentioned power limitation module 106 connect with the PLIMIT pin of above-mentioned power amplifier module, above-mentioned gain module 107 with it is upper
State power amplifier module 103 GAIN/SLVl pin connection, above-mentioned second signal input module 108 respectively with above-mentioned power amplifier module 103
INPL pin connected with INNL pin, above-mentioned mute module 109 is connect with the MUTE pin of above-mentioned power amplifier module 103, above-mentioned
Amplitude modulation module 110 is connect with the AM2 pin of above-mentioned power amplifier module 103, AM1 pin and AM0 pin respectively, the synchronous mould of said external
Block 111 is connect with the SYNC pin of above-mentioned power amplifier module 103, the PVCC of above-mentioned power module 1121 and above-mentioned power amplifier module 103
Pin connection, above-mentioned power module 1122 are connect with the PVCC pin of above-mentioned power amplifier module 103 and AVCC pin, above-mentioned first letter
Number output module 113 connects with the BSPR pin of above-mentioned power amplifier module 103, OUTPER pin, OUTNR pin and BSNR pin respectively
Connect, above-mentioned second signal output module 114 respectively with the BSPL pin, OUTPL pin, OUTNL pin of above-mentioned power amplifier module 103
It is connected with BSNL pin.Above-mentioned power amplifier module 103 is the power amplifier chips of model TPA3116D2-Q1, above-mentioned power amplifier module 103
Corresponding pin is pin corresponding to the power amplifier chips of model TPA3116D2-Q1, certainly, in other embodiments, function
Amplification module can also be constructed by the power amplifier chips of other signals, and corresponding pin is also possible to the pin of other signals, herein
Without limitation.
It can be seen that when above-mentioned power end 101 powers on, the charhing unit in time delay module 102 that is connect with power end 101
It starts to charge, the switch element in time delay module 102 is in the conductive state at this time, so that connecting with 102 output end of time delay module
The DC voltage of input terminal of power amplifier module 103 be less than the threshold voltage that powers on of power amplifier module 103, thus power amplifier module 103
In not power-up state (i.e. shutdown state), with charge to charhing unit so that the voltage of switch element control terminal slowly
Decline, when the voltage of switch element control terminal is lower than switching elements conductive voltage, switch element ends, so that above-mentioned power amplifier mould
The DC voltage of the input terminal of block 103 is not less than the threshold voltage that above-mentioned power amplifier module 103 powers on, thus the power amplifier module
103 are in power-up state.Therefore it can be realized when power end 101 powers on to power amplifier module 103 by above-mentioned time delay module 102
Power-on delay, so as to effectively inhibit power end 101 powered on moment electric current lead directly to power amplifier module 102 and generate booting
Impulsive sound, and damage of 101 powered on moment of power end to power amplifier can be reduced, and time delay module circuit is simple, it is at low cost.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.In addition, the specific name of each functional unit, module is also only for convenience of distinguishing each other,
The protection scope being not intended to limit this application.The specific work process of unit in above system, module, can refer to aforementioned side
Corresponding process in method embodiment, details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of power amplifier applied to sound equipment, which is characterized in that the power amplifier include: power end, time delay module and
Power amplifier module:
The input terminal of the time delay module is connect with the power end, the output end of the time delay module and the power amplifier module
Input terminal connection；
Wherein, the time delay module includes charhing unit and switch element, and the time delay module is in the switch element and leads
The first DC voltage is exported when logical state, the time delay module exports the second direct current when the switch element is in off state
Voltage；
Wherein, the switch element is in the conductive state when the charhing unit powers on, and the switch element is filled described
Off state is in when electric unit charging complete, and in the charging process of the charhing unit, the control of the switch element
The voltage swing at end and the charging time of the charhing unit are negatively correlated；
First DC voltage is less than the threshold voltage that the power amplifier module powers on；
Second DC voltage is not less than the threshold voltage that the power amplifier module powers on.
2. power amplifier as described in claim 1, which is characterized in that the charhing unit of the time delay module includes capacitor and
One resistance:
The first end of the capacitor is connect with the power end, the second end of the capacitor respectively with the first resistor first
End is connected with the control terminal of the switch element, and the output end of the second end of the first resistor and the switch element is connected to altogether
Ground；
Wherein, the voltage that the second end of the capacitor is exported when the capacitor starts to charge is not less than the switching elements conductive
Threshold voltage, the voltage that the second end of the capacitor is exported when the capacitor is completed and charged is less than the switching elements conductive
Threshold voltage.
3. power amplifier as claimed in claim 2, which is characterized in that the time delay module further includes second resistance:
The first end of the second resistance is connect with the power end, and the second end of the second resistance is first with the switch respectively
The input terminal of part is connected with the input terminal of the power amplifier module.
4. power amplifier as claimed in claim 3, which is characterized in that the time delay module further includes 3rd resistor, and described
The first end of three resistance is connect with the second end of the input terminal of the switch element and the second resistance respectively, and the third
The second end of resistance is connect with the input terminal of the power amplifier module.
5. such as the described in any item power amplifiers of Claims 1-4, which is characterized in that the switch element is NMOS tube, described
Control terminal, input terminal and the output end of switch element are respectively grid, drain electrode and the source electrode of the NMOS tube.
6. such as the described in any item power amplifiers of Claims 1-4, which is characterized in that the input terminal of the power amplifier module includes
First input pin and the second input pin.
7. power amplifier as claimed in claim 6, which is characterized in that the power amplifier module are as follows: model TPA3116D2-Q1
Power amplifier chips.
8. power amplifier as claimed in claim 7, which is characterized in that the power amplifier chips include that SDZ pin and FAULTZ draw
Foot, the SDZ pin are first input pin, and the FAULTZ pin is second input pin.
9. power amplifier as described in claim 1, which is characterized in that the power amplifier further include:
It is mode selection module, the first signal input module, power limitation module, gain module, second signal input module, mute
Module, amplitude modulation module, external sync module, power module, the first signal output module and second signal output module；
It is the mode selection module, first signal input module, the power limitation module, the gain module, described
It is second signal input module, the mute module, the amplitude modulation module, the external sync module, the power module, described
First signal output module and the second signal output module are connected to the power amplifier module altogether.
10. a kind of sound equipment, which is characterized in that the sound equipment includes such as the described in any item power amplifiers of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711235662.7A CN109862467A (en) | 2017-11-30 | 2017-11-30 | A kind of power amplifier and sound equipment applied to sound equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711235662.7A CN109862467A (en) | 2017-11-30 | 2017-11-30 | A kind of power amplifier and sound equipment applied to sound equipment |
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| CN109862467A true CN109862467A (en) | 2019-06-07 |
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| CN201711235662.7A Pending CN109862467A (en) | 2017-11-30 | 2017-11-30 | A kind of power amplifier and sound equipment applied to sound equipment |
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