CN108988800A - The circuit of power amplifier spontaneous heating is controlled under a kind of low temperature - Google Patents
The circuit of power amplifier spontaneous heating is controlled under a kind of low temperature Download PDFInfo
- Publication number
- CN108988800A CN108988800A CN201811091423.3A CN201811091423A CN108988800A CN 108988800 A CN108988800 A CN 108988800A CN 201811091423 A CN201811091423 A CN 201811091423A CN 108988800 A CN108988800 A CN 108988800A
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- Prior art keywords
- module
- power amplifier
- temperature
- value
- buffer
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 230000002269 spontaneous effect Effects 0.000 title claims description 9
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 206010037660 Pyrexia Diseases 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
Abstract
The invention discloses the circuits that power amplifier fever is controlled under a kind of low temperature, suitable for having the power amplifier of output buffer.It includes power amplifier module, buffer module, heating module and temperature detecting module.Power amplifier module receives input signal, and input signal is amplified, and amplified signal exports after buffer module.Buffer module includes first capacitor and first resistor.Temperature detecting module includes temperature detect switch (TDS) and a preset threshold value.Temperature detecting module detects ambient temperature, and when temperature monitoring value is lower than threshold value, switch-off power amplification module is opened heating module and heated to buffer module；When temperature monitoring value is higher than threshold value, power amplifier module is opened, turns off heating module, so that power amplifier restores to work normally.The present invention is lower in ambient temperature, when power amplifier normally can not start or work, is heated in advance using electric circuit characteristic, low in cost, circuit is simple, can be widely used for cold district.
Description
Technical field
The present invention relates to field electronic circuit field, control has the power amplifier of output buffer under especially a kind of low temperature
The circuit of spontaneous heating.
Background technique
Power amplifier being of wide application in production and living, different field, different regions all relate to.In majority of case
Under, since high temperature can cause irreversible damage to the component having in power amplifier, so heat dissipation is always power amplifier from being designed into
The problem of using that will pay attention to.However, the heat dissipation of power amplifier has not been main under certain extremely frigid zones and special application scenarios
Problem is wanted, starts power amplifier normally and becomes maximum problem with work.
In the prior art, most of power amplifiers all include filter circuit and buffer circuits etc., component in these circuits
Value carries out matched design to reduce circuit loss and fever generally according to the frequency band of signal.It is in the prior art mostly to accelerate to dissipate
The technology of heat, or the additional method for installing heating device additional, temporarily without be related to power amplifier due to temperature it is low normally can not start or work when
Utilize the technology of circuit spontaneous heating.
The circuit that power amplifier carries out spontaneous heating is controlled in low temperature therefore, it is necessary to provide.
Summary of the invention
In view of the above problems, the present invention provides the circuits that power amplifier spontaneous heating is controlled under a kind of low temperature.
The invention discloses the circuits that power amplifier spontaneous heating is controlled under a kind of low temperature, suitable for having the function of output buffer
It puts.It includes power amplifier module, buffer module, heating module and temperature detecting module.The power amplifier module receives defeated
Enter signal, and input signal is amplified, amplified signal exports after the buffer module.The buffer module packet
Include first capacitor and first resistor.The temperature detecting module packet temperature detect switch (TDS) and preset threshold value.The temperature detection
Module detects ambient temperature and turns off the power amplifier module when temperature monitoring value is lower than threshold value, open the heating module；
When temperature detection value is higher than threshold value, the power amplifier module is opened, the heating module is turned off.
The buffer module is the spike for eliminating the voltage and current generated due to switching device, root in the prior art
The value of component in buffer circuit is determined according to the size and frequency of spike.But in the buffer module of the invention, in order to
Accelerate electrothermal calefactive rate and keep normal working temperature, the value of first capacitor than in the prior art in buffer circuit capacitor value
Greatly, the value of resistance is small in buffer circuit than in the prior art for the value of first resistor, produces while eliminating Voltage and Current Spikes
Raw additional fever.
The heating module is controlled by the temperature detecting module, makes power amplifier fever to by circuit substrate or sky
The thermal coupling of gas, so that circuit environment temperature of the invention reaches the temperature that component in circuit can work normally.
The temperature detecting module includes temperature detect switch (TDS) and preset threshold value.Temperature detect switch (TDS) detection environment temperature is simultaneously controlled
It makes the switch of the power amplifier module and the heating module: if temperature monitoring value is lower than threshold value, turning off the power and put
Big module opens the heating module；If being higher than threshold value, power amplifier module is opened, the heating module is turned off.
The present invention compensates for cold district power amplifier compared to the prior art and is difficult to normally start the shortcoming with normal use, benefit
Component is heated in advance with the characteristics of circuit itself, and low in cost, circuit is simple, can be widely used for low temp area.
In order to above content of the invention can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate institute's accompanying drawings,
It is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is schematic block circuit diagram of the invention；
Fig. 2 is the circuit diagram of first embodiment of the invention；
Fig. 3 is the circuit diagram of second embodiment of the invention.
It is numbered in figure:
10,110,210: power amplifier module；
20,120,220: buffer module；
30,130,230: heating module；
40,140,240: temperature detecting module；
201: the first capacitor in the buffer module；
202: the first resistor in the buffer module；
2301: the capacitor in the heating module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.
Referring to Fig. 1, being schematic block circuit diagram of the invention, including power amplifier module 10, buffer module 20, heated mould
Block 30 and temperature detecting module 40.Power amplifier module 10 receives input signal, and input signal is amplified, through buffer module 20
After export.Buffer module 20 includes first capacitor 201 and first resistor 202, all more normal power amplifier of the value of the two components
The calculating conventional value of circuit is had any different: the value of first capacitor 201 is big compared with conventional value, and the value of first resistor 202 is compared with conventional value
It is small.Temperature detecting unit 40 detects ambient temperature and controls turning on and off for heating module 30 and power amplifier module 10.
Referring to Fig. 2, be the circuit diagram of first embodiment of the invention, by taking the D class power amplifier of PWM modulation as an example, including
Power amplifier module 110, buffer module 120, heating module 130 and temperature detecting module 140.Power amplifier module 110 receives
Input signal, and input signal is amplified, it is exported after buffer module 120.Buffer module 120 includes first capacitor 1201 and the
One resistance 1202, the value of the two components are all had any different compared with the calculating conventional value of the prior art: first capacitor 1201 takes
Value is big compared with conventional value, and the value of first resistor 1202 is small compared with conventional value.In the present embodiment, heating module 130 is an alternating current
Potential source, first capacitor 1201 and first resistor 1202 can generate heat under the action of module 130.Temperature detecting unit 140 includes
Temperature detect switch (TDS) and preset threshold value connect heating module 130 when the temperature that temperature detect switch (TDS) detects is lower than threshold value, defeated
Enter and disconnect between power amplifier module 110, power amplifier is in heated condition, does not work；When the temperature that temperature detect switch (TDS) detects
When degree is higher than threshold value, input and power amplifier module 110 are connected, heating module is disconnected, and power amplifier works normally.Utilize buffering mould
The first capacitor 1201 big compared with conventional value and the first resistor 1202 small compared with conventional value in block 120, so that the normal work of power amplifier
Calorific value is bigger than regular situation, and power amplifier is maintained to continue working within a reasonable temperature range.
Referring to Fig. 3, be the circuit diagram of second embodiment of the invention, by taking the D class power amplifier of PWM modulation as an example, including
Power amplifier module 210, buffer module 220, heating module 230 and temperature detecting module 240.Power amplifier module 20 receives defeated
Enter signal, and input signal is amplified, is exported after buffer module 220.Buffer module 220 includes first capacitor 2201 and first
Resistance 2202, the value of the two components are all had any different compared with the calculating conventional value of the prior art: the value of first capacitor 2201
Big compared with conventional value, the value of first resistor 2202 is small compared with conventional value.In the present embodiment, heating module 230 is an alternating voltage
Source and capacitor 2301, when heating module is switched on, capacitor 2301 is connected in parallel on 2201 liang of the first capacitor in buffer module 220
End, so that capacitance total in buffer module 220 increases, to accelerate heating speed.Temperature detecting module 240 is opened including temperature control
It closes and preset threshold value connects heating module 230, input and function when the temperature that temperature detect switch (TDS) detects is lower than threshold value
Disconnect between rate amplification module 210, power amplifier is in heated condition, does not work；When the temperature that temperature detect switch (TDS) detects is higher than
When threshold value, input and power amplifier module 210 are connected, heating module is disconnected, and power amplifier works normally.Utilize buffer module 220
In the first capacitor 2201 big compared with conventional value and the first resistor 2202 small compared with conventional value so that the normal work calorific value of power amplifier
It is bigger than regular situation, maintain power amplifier to continue working within a reasonable temperature range.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (2)
1. controlling the circuit of power amplifier spontaneous heating under a kind of low temperature, which is characterized in that including power amplifier module, buffer module, add
Thermal modules and temperature detecting module；The power amplifier module receives and amplifies input signal, exports after the buffer module；
The buffer module includes first resistor and first capacitor；The temperature detecting module includes a temperature detect switch (TDS) and presets
Threshold value, control the on-off between the on-off of the heating module and input and the power amplifier module.
2. controlling the circuit of power amplifier spontaneous heating under a kind of low temperature as described in claim 1, which is characterized in that the buffer module
Including first resistor and first capacitor, the value of first capacitor is bigger than the value of the prior art, and the value of first resistor compares the prior art
Value it is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811091423.3A CN108988800A (en) | 2018-09-19 | 2018-09-19 | The circuit of power amplifier spontaneous heating is controlled under a kind of low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811091423.3A CN108988800A (en) | 2018-09-19 | 2018-09-19 | The circuit of power amplifier spontaneous heating is controlled under a kind of low temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108988800A true CN108988800A (en) | 2018-12-11 |
Family
ID=64545691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811091423.3A Withdrawn CN108988800A (en) | 2018-09-19 | 2018-09-19 | The circuit of power amplifier spontaneous heating is controlled under a kind of low temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108988800A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11764731B2 (en) * | 2020-02-21 | 2023-09-19 | STMicroelectronics (Alps) SAS | Drift compensation |
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|---|---|---|---|---|
| CN1549073A (en) * | 2003-05-10 | 2004-11-24 | 华为技术有限公司 | Temperature controlling apparatus and method thereof |
| US20060214730A1 (en) * | 2003-04-07 | 2006-09-28 | Junichiro Yamakawa | Transmission amplifier |
| CN101509688A (en) * | 2009-03-24 | 2009-08-19 | 阿姆斯壮机械（中国）有限公司 | Electric heating type steam humidifier |
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| CN102256401A (en) * | 2011-06-22 | 2011-11-23 | 深圳和而泰智能控制股份有限公司 | Multi-coil electromagnetic heating system and method |
| CN102281623A (en) * | 2010-06-11 | 2011-12-14 | 华为技术有限公司 | Method for regulating equipment power, detection control subsystem and equipment system |
| CN103412589A (en) * | 2013-07-18 | 2013-11-27 | 江苏中科天安智联科技有限公司 | Low-temperature protection device of vehicle-mounted intelligent terminal |
| CN203590070U (en) * | 2013-11-26 | 2014-05-07 | 上海联星电子有限公司 | IGBT buffering adsorption circuit |
| CN104808715A (en) * | 2015-03-11 | 2015-07-29 | 北京工业大学 | Chip-level GaAs power device and microwave single-chip circuit surface temperature detection method |
| CN204511732U (en) * | 2015-01-29 | 2015-07-29 | 中国电子科技集团公司第十三研究所 | A kind of fuel filter electrical heating controller |
| CN204536939U (en) * | 2015-04-13 | 2015-08-05 | 广东美的生活电器制造有限公司 | The power control circuit of electric kettle and electric kettle |
| CN204739785U (en) * | 2015-06-30 | 2015-11-04 | 深圳市泰金田科技有限公司 | Heater |
| CN108110824A (en) * | 2017-12-12 | 2018-06-01 | 南京中感微电子有限公司 | A kind of battery low temperature charging control circuit |
| CN207516844U (en) * | 2017-11-21 | 2018-06-19 | 成都煜明装饰工程有限公司 | A kind of smart home device temperature control system |
-
2018
- 2018-09-19 CN CN201811091423.3A patent/CN108988800A/en not_active Withdrawn
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060214730A1 (en) * | 2003-04-07 | 2006-09-28 | Junichiro Yamakawa | Transmission amplifier |
| CN1549073A (en) * | 2003-05-10 | 2004-11-24 | 华为技术有限公司 | Temperature controlling apparatus and method thereof |
| CN101677242A (en) * | 2008-09-17 | 2010-03-24 | 株式会社东芝 | Bias controller |
| CN101509688A (en) * | 2009-03-24 | 2009-08-19 | 阿姆斯壮机械（中国）有限公司 | Electric heating type steam humidifier |
| CN201450611U (en) * | 2009-07-03 | 2010-05-05 | 瞿守春 | Capacitive heater |
| CN102281623A (en) * | 2010-06-11 | 2011-12-14 | 华为技术有限公司 | Method for regulating equipment power, detection control subsystem and equipment system |
| CN102256401A (en) * | 2011-06-22 | 2011-11-23 | 深圳和而泰智能控制股份有限公司 | Multi-coil electromagnetic heating system and method |
| CN103412589A (en) * | 2013-07-18 | 2013-11-27 | 江苏中科天安智联科技有限公司 | Low-temperature protection device of vehicle-mounted intelligent terminal |
| CN203590070U (en) * | 2013-11-26 | 2014-05-07 | 上海联星电子有限公司 | IGBT buffering adsorption circuit |
| CN204511732U (en) * | 2015-01-29 | 2015-07-29 | 中国电子科技集团公司第十三研究所 | A kind of fuel filter electrical heating controller |
| CN104808715A (en) * | 2015-03-11 | 2015-07-29 | 北京工业大学 | Chip-level GaAs power device and microwave single-chip circuit surface temperature detection method |
| CN204536939U (en) * | 2015-04-13 | 2015-08-05 | 广东美的生活电器制造有限公司 | The power control circuit of electric kettle and electric kettle |
| CN204739785U (en) * | 2015-06-30 | 2015-11-04 | 深圳市泰金田科技有限公司 | Heater |
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| US11764731B2 (en) * | 2020-02-21 | 2023-09-19 | STMicroelectronics (Alps) SAS | Drift compensation |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181211 |