CN104579197B - A kind of audio power amplifying circuit and its mode control circuit - Google Patents
A kind of audio power amplifying circuit and its mode control circuit Download PDFInfo
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- CN104579197B CN104579197B CN201310467837.2A CN201310467837A CN104579197B CN 104579197 B CN104579197 B CN 104579197B CN 201310467837 A CN201310467837 A CN 201310467837A CN 104579197 B CN104579197 B CN 104579197B
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- 238000003079 width control Methods 0.000 claims description 4
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
- H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
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Abstract
The present invention provides a kind of audio power amplifying circuit and its mode control circuit, wherein, the mode control circuit includes control signal detection module and mode control module, the control signal detection module includes single control port, the single control port is used to receive a pulse control signal, control signal detection module detects pulse control signal and exports mode control instruction corresponding with pulse control signal, and mode control module is based on mode control instruction control audio power amplification module and is operated under corresponding mode of operation.Compared with prior art, audio power amplifying circuit and its mode control circuit in the present invention have single control port, the mode control circuit is operated in different mode of operations based on the pulse control signal control audio power amplifying circuit that the single control port receives, so as to reduce circuit application periphery, manufacture and the packaging cost of circuit chip are reduced.
Description
【Technical field】
The present invention relates to audio power amplifying circuit field, more particularly to a kind of audio power amplifying circuit and its pattern control
Circuit processed.
【Background technology】
With the development of Audio power amplifier technology, the mode of operation of audio power amplifying circuit is more and more.Existing skill
In art, every kind of mode of operation of audio power amplifying circuit needs an independent control port, more in the upper needs of application
Periphery circuit is controlled, and adds the relevant cost of the application of product, and the increase of the control port quantity of chip can increase
Add the cost and packaging cost of IC (Integrated Circuit, integrated circuit) chip, cause whole application scheme cost
It is high.
It is below the common several mode of operations of audio power amplifying circuit, and every kind of mode of operation has single control terminal
Mouth is controlled, and is listed as follows：
If the Schema control of above mode of operation all uses, the control port of more than 7 is at least needed, and each
Port needs independent periphery circuit and control signal to control the switching of mode of operation.
Current most of product design is limited to cost pressure and all only have selected which part Schema control, result in product
Flexibility in application process is inadequate, and occupies compared with multiport, improves the production cost and application cost of product.
Therefore, it is necessary to a kind of improved technical scheme is provided to overcome above mentioned problem.
【The content of the invention】
It is an object of the invention to provide a kind of audio power amplifying circuit and its mode control circuit, the Schema control
Circuit controls audio power amplifying circuit to be operated in different mode of operations by single control port, so as to reduce circuit application
Periphery, reduce manufacture and the packaging cost of circuit chip.
In order to solve the above problems, according to an aspect of the present invention, the present invention provides a kind of audio power amplifying circuit
Mode control circuit, it includes control signal detection module and mode control module.The control signal detection module includes single
Individual control port, the single control port are used to receiving a pulse control signal, described in control signal detection module detection
Pulse control signal simultaneously exports mode control instruction corresponding with the pulse control signal；The mode control module is based on institute
Mode control instruction control audio power amplification module is stated to be operated under corresponding mode of operation, wherein, the Pulse Width Control letter
Number include the first level and second electrical level that alternate.
Further, the control signal detection module includes counting unit and control decoding unit.The counting unit
Counted based on the pulse control signal, set in advance when the duration of the first level of the pulse control signal is more than
During fixed very first time threshold value, the counting unit resets；After the counting unit resets, if the pulse control signal by
First level saltus step is second electrical level, counting unit with regard to accumulated counts once, when the second electrical level of the pulse control signal
When duration is more than the second time threshold set in advance, the counting unit stops counting and exporting count value, described
Control decoding unit is used to decode the count value, to export mode control instruction corresponding with the count value.
Further, the control decoding unit be stored with multiple mode control instructions for pre-setting and with it is each
The unique corresponding count value of mode control instruction, when the counting unit exports count value, the control decoding unit is to this
Count value is decoded, to export mode control instruction corresponding with the count value.
Further, it is more than the very first time threshold value when the duration of the first level of the pulse control signal
When, the mode control module resets to original state set in advance, to control the audio power amplification module to be operated in
Under predetermined mode of operation；When it is described control decoding unit export the mode control instruction when, the mode control module by
The mode control instruction state is arrived in the original state renewal, to control the audio power amplification module to enter the Schema control
Mode of operation corresponding to instruction.
Further, first level is high level, and second electrical level is low level, is more than described first positioned at adjacent
The high level of time threshold and more than each high level time between the low level of second time threshold and each low electricity
The 3rd time threshold is respectively less than between usually, the 3rd time threshold is less than very first time threshold value and is less than the second time threshold.
Further, the pulse control signal is sent by micro-control unit.
According to another aspect of the present invention, the present invention provides a kind of audio power amplifying circuit, and it includes a kind of audio work(
The mode control circuit of rate amplifying circuit, it includes control signal detection module and mode control module, the control signal inspection
Surveying module includes single control port, and the single control port is used to receive a pulse control signal, the control signal detection
Module detects the pulse control signal and exports mode control instruction corresponding with the pulse control signal；The pattern control
Molding block is based on mode control instruction control audio power amplification module and is operated under corresponding mode of operation, wherein, institute
Stating pulse control signal includes the first level and second electrical level that alternate, a mode pins of micro-control unit with it is described
The single control port of the control signal detection module of the mode control circuit is connected, and by the mode pins to the control
Signal detection module sends pulse control signal.The audio power amplifying circuit also includes the mould with the mode control circuit
The connected audio power amplification module of the output end of formula control module.
Compared with prior art, the audio power amplifying circuit in the present invention and its mode control circuit have single control
Port, the pulse control signal control Audio power amplifier electricity that the mode control circuit is received based on the single control port
Road is operated in different mode of operations, so as to reduce circuit application periphery, reduces manufacture and the packaging cost of circuit chip.
【Brief description of the drawings】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, it can also be obtained according to these accompanying drawings other
Accompanying drawing.Wherein：
Fig. 1 is the structure block diagram of the audio power amplifying circuit in the present invention；
Fig. 2 is the set of pulses control signal that the audio power amplifying circuit in the present invention receives.
【Embodiment】
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
" one embodiment " or " embodiment " referred to herein refers to may be included at least one implementation of the present invention
Special characteristic, structure or characteristic." in one embodiment " that different places occur in this manual not refers both to same
Individual embodiment, nor the single or selective embodiment mutually exclusive with other embodiment.Unless stated otherwise, herein
In connect, be connected, connecting expression be electrically connected with word represent directly or indirectly to be electrical connected.
Mode control circuit in the present invention has single control port, and the mode control circuit is based on the single control
The pulse control signal control audio power amplifying circuit that port processed receives is operated in different mode of operations, so as to reduce circuit
Using periphery, manufacture and the packaging cost of circuit chip are reduced.
It refer to shown in Fig. 1, it is the structure block diagram of the audio power amplifying circuit in the present invention.The audio
Power amplification circuit 100 includes mode control circuit 110 and audio power amplification module（It is not shown）.
The mode control circuit 110 includes control signal detection module 112 and mode control module 114.
The control signal detection module 112 includes single control port MODE, and the single control port MODE is used to connect
Pulse control signal S1 is received, the control signal detection module 112 detects the pulse control signal and exported and the pulse
Mode control instruction MCS corresponding to control signal（Mode control signal, or mode control signal）, wherein, it is described
Pulse control signal includes the first level and second electrical level alternateed.
In the embodiment shown in fig. 1, the control signal detection module 112 includes counting unit 1122 and control decodes
Unit 1124.
The counting unit 1122 is counted based on the pulse control signal, when the first of the pulse control signal
When the duration of level is more than very first time threshold value set in advance, the counting unit resets；When the counting unit is answered
Behind position, if the pulse control signal is second electrical level by the first level saltus step, counting unit with regard to accumulated counts once, when described
When the duration of the second electrical level of pulse control signal is more than the second time threshold set in advance, the counting unit stops
Count and export count value.
The control decoding unit 1124 is used to decode the count value, to export mould corresponding with the count value
Formula control instruction.Specifically, the control decoding unit 1124 be stored with multiple mode control instructions for pre-setting and
With the unique corresponding count value of each mode control instruction, when the counting unit 1122 exports count value, the control solution
Code unit 1124 decodes to the count value, to export mode control instruction corresponding with the count value.
The mode control module 114 controls the audio power amplification module entrance pair according to the mode control instruction
The mode of operation answered.In a preferred embodiment, it is more than when the duration of the first level of the pulse control signal
During the very first time threshold value, the mode control module 114 resets to original state set in advance, to control the audio
Power amplifier module is operated under predetermined mode of operation；When the control 1124 output mode control instruction of decoding unit,
The mode control module 114 is updated to the mode control instruction state by the original state, to control the audio power
Amplification module enters mode of operation corresponding to the mode control instruction.
It should be noted that in the present invention, the mode of operation of the audio power amplifying circuit and the audio power
The concept of the mode of operation of amplification module is consistent or similar, and the audio power amplification module is operated in some work
Under pattern, then mean that the audio power amplifying circuit is also operated in this mode of operation, they there may come a time when to be used with.
In the embodiment shown in fig. 1, the pulse control signal is preferably by MCU（Micro Control Unit, it is micro-
Control unit）Main control chip 200 exports, and reason is that present sound equipment scheme all includes MCU main control chips substantially, so easily
The control signal of compatible MCU main control chips output, and can effectively reduce circuit peripheral.Specifically, the one of micro-control unit
Individual mode pins are connected with the single control port of the control signal detection module of the mode control circuit, and pass through the pattern
Pin sends pulse control signal to the control signal detection module.
For the ease of understanding the present invention, below by way of a specific embodiment to the audio power amplifying circuit shown in Fig. 1
Schema control be introduced.
In the present embodiment, first level is high level, and second electrical level is low level.
It is the common several work of the audio power amplifying circuit that control decoding unit 1124 stores below in the present embodiment
The unique corresponding count value of mode control instruction and every kind of mode of operation control instruction, is listed as follows：
When needing to set the mode of operation of the audio power amplifying circuit, user can pass through outside input module
（It is not shown）The selected mode of operation for needing to set, MCU main control chips 200 are according to corresponding to the mode of operation output that user selectes
One group or a series of pulse control signal.
It refer to shown in Fig. 2, it is the audio power amplifying circuit in the present invention when a pattern is set（In other words
The MODE ends）The set of pulses control signal received.
When the counting unit 1122 detects that the duration of the high level of the pulse control signal shown in Fig. 2 is more than in advance
During the very first time threshold value TR first set, the counting unit 1122 is reset to 0, next, the counting unit 1122 is often examined
Measure a trailing edge（I.e. control signal is low level by high level saltus step）With regard to accumulated counts once, until the Pulse Width Control
When the low level duration of signal is more than the second time threshold TS set in advance, the counting unit 1122 stops meter
Number, now the count value of the counting unit 1122 is N, and exports count value N.
When the duration of the high level of the pulse control signal shown in Fig. 2 being more than the very first time threshold value TR, institute
State mode control module 114 and reset to original state set in advance；When the control decoding unit 1124 exports the pattern
During control instruction, the mode control module 114 is updated to the mode control instruction state by the original state, to control
State audio power amplification module and enter mode of operation corresponding to the mode control instruction.
If what user was carried out is that Jing Yin mode of operation is set, the MODE ends should receive pulse control corresponding to one group
Signal processed, the counting unit 1122 should be count value N=8 to the count results of the group pulse control signal, the control solution
Code unit 1124 finds Jing Yin mode of operation control instruction corresponding with the count value 8 and to export this Jing Yin according to the count value 8
Mode of operation control instruction.The mode control module 114 is updated to the Jing Yin operational mode state by the original state, with
The audio power amplification module is controlled to enter the Jing Yin mode of operation.
Special instruction is needed exist for, in counting process, positioned at the high level more than the very first time threshold value TR
Each high level time TH and each low level time TL between the low level more than the second time threshold TS is small
In the 3rd time threshold T ', the 3rd time threshold T ' is less than very first time threshold value TR and is less than the second time threshold TS, with
With the response time（That is very first time threshold value TR and the second time threshold TS）Mutually distinguish.It is corresponding, it is low in first level
Level, second electrical level are in the embodiment of high level, positioned at the low level more than the very first time threshold value TR and more than described
Each high level time TH and each low level time TL between second time threshold TS high level were respectively less than for the 3rd time
Threshold value T ', the 3rd time threshold T ' are less than very first time threshold value TR and are less than the second time threshold TS.
In summary, the audio power amplifying circuit in the present invention and its mode control circuit have single control port,
The mode control circuit controls audio power amplifying circuit based on the pulse control signal that the single control port receives
Different mode of operations is operated in, and the pulse control signal is preferably to be exported by MCU main control chips 200, so as to reduce
Circuit application periphery, reduce manufacture and the packaging cost of circuit chip.
It is pointed out that any change that one skilled in the art is done to the embodiment of the present invention
All without departing from the scope of claims of the present invention.Correspondingly, the scope of claim of the invention is also not merely limited to
In previous embodiment.
Claims (6)
- A kind of 1. mode control circuit of audio power amplifying circuit, it is characterised in that it include control signal detection module and Mode control module,The control signal detection module includes single control port, and the single control port is used to receive Pulse Width Control letter Number, the control signal detection module detects the pulse control signal and exports pattern corresponding with the pulse control signal Control instruction,The mode control module is based on mode control instruction control audio power amplification module and is operated in corresponding work Under pattern,Wherein, the pulse control signal includes the first level and second electrical level alternateed,The control signal detection module also includes counting unit and control decoding unit,The counting unit counted based on the pulse control signal, when the first level of the pulse control signal is held When the continuous time is more than very first time threshold value set in advance, the counting unit resets；After the counting unit resets, if institute It is second electrical level that pulse control signal, which is stated, by the first level saltus step, counting unit with regard to accumulated counts once, when the Pulse Width Control When the duration of the second electrical level of signal is more than the second time threshold set in advance, the counting unit stops counting and will Count value exports,The control decoding unit is used to decode the count value, is referred to exporting Schema control corresponding with the count value Order.
- 2. the mode control circuit of audio power amplifying circuit according to claim 1, it is characterised in thatThe control decoding unit be stored with multiple mode control instructions for pre-setting and with each mode control instruction Count value corresponding to unique, when the counting unit exports count value, the control decoding unit solves to the count value Code, to export mode control instruction corresponding with the count value.
- 3. the mode control circuit of audio power amplifying circuit according to claim 1, it is characterised in thatWhen the duration of the first level of the pulse control signal being more than the very first time threshold value, the Schema control Module resets are to original state set in advance, to control the audio power amplification module to be operated in predetermined mode of operation Under；When it is described control decoding unit export the mode control instruction when, the mode control module by the original state more The mode control instruction state is newly arrived, is worked with controlling the audio power amplification module to enter corresponding to the mode control instruction Pattern.
- 4. the mode control circuit of audio power amplifying circuit according to claim 1, it is characterised in that it is located at,First level is high level, and second electrical level is low level,Positioned at adjacent more than between the high level of the very first time threshold value and the low level more than second time threshold Each high level time and each low level time be respectively less than the 3rd time threshold, when the 3rd time threshold is less than first Between threshold value and be less than the second time threshold.
- 5. the mode control circuit of audio power amplifying circuit according to claim 1, it is characterised in that be located at, the arteries and veins Control signal is rushed to be sent by micro-control unit.
- 6. a kind of audio power amplifying circuit, it is characterised in that it includes：Mode control circuit as described in claim 1-5 is any, a mode pins and the Schema control of micro-control unit The single control port of the control signal detection module of circuit is connected, and detects mould to the control signal by the mode pins Block sends pulse control signal；The audio power amplification module being connected with the output end of the mode control module of the mode control circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310467837.2A CN104579197B (en) | 2013-10-09 | 2013-10-09 | A kind of audio power amplifying circuit and its mode control circuit |
| PCT/CN2013/091096 WO2015051582A1 (en) | 2013-10-09 | 2013-12-31 | Audio power amplification circuit and mode control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310467837.2A CN104579197B (en) | 2013-10-09 | 2013-10-09 | A kind of audio power amplifying circuit and its mode control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104579197A CN104579197A (en) | 2015-04-29 |
| CN104579197B true CN104579197B (en) | 2017-11-24 |
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| CN201310467837.2A Active CN104579197B (en) | 2013-10-09 | 2013-10-09 | A kind of audio power amplifying circuit and its mode control circuit |
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| Country | Link |
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| CN (1) | CN104579197B (en) |
| WO (1) | WO2015051582A1 (en) |
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| CN111885462B (en) * | 2020-07-17 | 2022-08-05 | 上海艾为电子技术股份有限公司 | Audio power amplifier circuit, power amplifier mode control method thereof and electronic equipment |
| CN115691088B (en) * | 2023-01-04 | 2023-05-02 | 上海海栎创科技股份有限公司 | Control signal transmission unit, system and method |
| CN115880883B (en) * | 2023-01-29 | 2023-06-09 | 上海海栎创科技股份有限公司 | System and method for selectively transmitting control signals between systems |
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| CN101167244A (en) * | 2005-04-05 | 2008-04-23 | 国际整流器公司 | Gate driver for class D audio amplifier with adaptive DV/DT control |
| CN101938257A (en) * | 2009-06-30 | 2011-01-05 | 瑞昱半导体股份有限公司 | Audio processing chip and audio signal processing method thereof |
| CN102299688A (en) * | 2010-06-22 | 2011-12-28 | 炬力集成电路设计有限公司 | Audio power amplifier and method for switching audio power amplifying modes |
| CN102368164A (en) * | 2010-06-25 | 2012-03-07 | 雅马哈株式会社 | Mode control circuit, semiconductor integrated circuit and audio processing circuit |
| CN102857228A (en) * | 2011-06-30 | 2013-01-02 | 富泰华工业（深圳）有限公司 | Electronic equipment and audio output control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI392224B (en) * | 2009-04-16 | 2013-04-01 | Realtek Semiconductor Corp | Audio processing chip and audio signal processing method thereof |
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2013
- 2013-10-09 CN CN201310467837.2A patent/CN104579197B/en active Active
- 2013-12-31 WO PCT/CN2013/091096 patent/WO2015051582A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167244A (en) * | 2005-04-05 | 2008-04-23 | 国际整流器公司 | Gate driver for class D audio amplifier with adaptive DV/DT control |
| CN101938257A (en) * | 2009-06-30 | 2011-01-05 | 瑞昱半导体股份有限公司 | Audio processing chip and audio signal processing method thereof |
| CN102299688A (en) * | 2010-06-22 | 2011-12-28 | 炬力集成电路设计有限公司 | Audio power amplifier and method for switching audio power amplifying modes |
| CN102368164A (en) * | 2010-06-25 | 2012-03-07 | 雅马哈株式会社 | Mode control circuit, semiconductor integrated circuit and audio processing circuit |
| CN102857228A (en) * | 2011-06-30 | 2013-01-02 | 富泰华工业（深圳）有限公司 | Electronic equipment and audio output control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104579197A (en) | 2015-04-29 |
| WO2015051582A1 (en) | 2015-04-16 |
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Address after: 214135 -6, Linghu Avenue, Wuxi Taihu international science and Technology Park, Wuxi, Jiangsu, China, 180 Patentee after: China Resources micro integrated circuit (Wuxi) Co., Ltd Address before: No.180-22, Linghu Avenue, Taihu International Science and Technology Park, Wuxi, Jiangsu 214135 Patentee before: WUXI CHINA RESOURCES SEMICO Co.,Ltd. |