CN110351630A - A kind of power amplifier control system and method based on auto level control - Google Patents
A kind of power amplifier control system and method based on auto level control Download PDFInfo
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- CN110351630A CN110351630A CN201910521229.2A CN201910521229A CN110351630A CN 110351630 A CN110351630 A CN 110351630A CN 201910521229 A CN201910521229 A CN 201910521229A CN 110351630 A CN110351630 A CN 110351630A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
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Abstract
The invention discloses a kind of power amplifier control system and method based on auto level control, it mainly include controllable attenuation circuit etc., the first input end of controllable attenuation circuit connects signal input, the output of second input termination differential integrator circuit of controllable attenuation circuit controls signal Vp, the output of controllable attenuation circuit terminates signal circuit input terminal, the input terminal of the output termination final stage power amplifier pipe of signal circuit, final stage power amplifier pipe output end are signal output；Temperature sensing circuit is used for the detection of power amplifier temperature.The present invention can also increase voltage control circuit to reduce power tube quiescent dissipation.Beneficial effect of the present invention: in addition to the method for drop power, the method of reduction power tube quiescent dissipation is additionally used to reduce power consumption, power amplifier power consumption under final minimum output power of the invention and minimum static state is very small, therefore power amplifier can be made to keep certain power output under extreme hot conditions, makes system holding part communication function.
Description
Technical field
The present invention relates to the fields of power amplification system, and in particular to a kind of power amplifier control system based on auto level control and
Method.
Background technique
Power amplifier is widely used in the electronic products such as communication, household electrical appliances, is mainly used for the high-power amplification to signal, increases letter
Number intensity improves the range of signal covering；With the progress of the demand and technology in market, the size of various electronic products is increasingly
It is small, while bring is that the dissipating-heat environment of power amplifier becomes increasingly complex, since equipment performance decline caused by device temperature is excessively high is tight
The phenomenon that weight even damages is more and more.
Existing product is usually when the temperature for detecting power amplifier module is greater than preset thresholding temperature to the safeguard measure of power amplifier
When spending, then operating power amplifier according to preset ratio reduces power to reduce power consumption, so that power amplifier temperature is reduced, if current operation
The number that power amplifier reduces power then closes power amplifier when being greater than preset times；Such as application publication number CN109348310A, the program pair
The core measure of the temperature protection of power amplifier are as follows: default first excess temperature threshold value and the second excess temperature threshold value, when power amplifier temperature is greater than
When first excess temperature threshold value is less than the second excess temperature threshold value, the number for reducing baseband transmission power is obtained, if the reduction emits
The number of power, which is less than some preset value, then reduces the baseband transmission power according to preset ratio, otherwise closes amplifier power supply.
This method has the disadvantage that:
1, drop power operation has the limitation of stepping, if preset drop power proportions are crossed, power amplifier temperature may well occur far small
In threshold temperature but power decline is excessive, greatly wastes the performance of power amplifier；If preset drop power proportions are too small, have can
Energy emergent power power declined slowly, cannot protect power amplifier in time；
2, it drops and in power operation has to that suitable time interval is arranged, because from power amplifier power is reduced to detecting power amplifier
Temperature reduction have regular hour process, if being not provided with time interval or time interval is too short, last time drop power operation
Effect entered there are no embodiment and drop power operation next time, cause the output power of power amplifier to reduce even to execute quickly and close function
The operation put；But being once provided with this time interval will make power amplifier work in the case where being more than threshold temperature；
3, the method to cool down is single, only considers to cool down by drop power reducing power consumption, actually when the output power of power amplifier
Power reduces institute's energy bring power consumption decreasing value very little after reducing to a certain extent, due to function power amplifier does not have output power
Put static working current itself still has very big power consumption there are it, therefore after dropping power operation number and reaching preset value only
Power amplifier can be completely closed；
4, for the purpose of protection power amplifier, if the temperature of power amplifier still surpasses after drop power operation number is more than preset times
Crossing after threshold temperature can generally be closed using the operation and power amplifier for closing power amplifier will not generally be then turned on；Although this operation protects
Power amplifier is not damaged, it can also cause power amplifier function is entirely ineffective, is communicated and is all interrupted.
Summary of the invention
It is an object of the invention to overcome the shortcomings of the prior art, and provide a kind of function based on auto level control
Put control system and method.
The object of the present invention is achieved by the following technical solutions: a kind of power amplifier control based on auto level control
System, mainly include controllable attenuation circuit, signal circuit, final stage power amplifier pipe, differential integrator circuit and temperature sensing circuit,
Wherein the first input end of controllable attenuation circuit connects signal input, the second input termination differential integrator circuit of controllable attenuation circuit
Output control signal Vp, the output of controllable attenuation circuit terminates signal circuit input terminal, the output of signal circuit
The input terminal of final stage power amplifier pipe is terminated, final stage power amplifier pipe output end is signal output；Temperature sensing circuit is for power amplifier temperature
Detection, the output signal Vt1 of the first input end jointing temp detection circuit of differential integrator circuit, the second input terminal jointing temp thresholding
Reference value Vt2；Differential integrator circuit is compared the temperature detection value Vt1 and temperature threshold reference value Vt2 of input, according to than
Relatively result output control signal Vp controls the attenuation of controllable attenuator.
Further, the differential integrator circuit mainly includes comparator, and comparator input terminal distinguishes jointing temp thresholding
The temperature detection value Vt1 of reference value Vt2 and temperature sensing circuit output end；When temperature detection value Vt1 is referred to less than temperature threshold
When value Vt2 (Vt1 < Vt2), comparator output control signal Vp does not increase the attenuation of controllable attenuation circuit, output power signal
It is constant；When temperature detection value Vt1 is more than or equal to temperature threshold reference value Vt2 (Vt1 >=Vt2), comparator output control signal
Vp jump, increases the attenuation of controllable attenuation circuit, and output power signal starts to reduce, and is finally equal to temperature detection value Vt1
Temperature threshold reference value Vt2.
Further, the output signal Vp jump of the differential integrator circuit rises including voltage or voltage declines, if
It is that voltage declines that the control voltage decline decaying of controllable attenuation circuit, which increases and then controls signal Vp jump, if otherwise controllable attenuation electricity
It is that voltage rises that the control voltage on road, which rises decaying increasing then to control signal Vp jump,.
Further, the controllable attenuation circuit includes voltage-controlled attenuator.
Further, the temperature sensing circuit includes analog temperature detection device or thermistor.
As another technical solution, the invention also includes voltage control circuit, the first input ends of voltage control circuit
Normal voltage Vg1 is met, the output of the second input termination differential integrator circuit controls signal Vp, and the power supply of final stage power amplifier pipe terminates electricity
Press the output signal Vg2 of control circuit；When power amplifier temperature is less than temperature threshold reference value Vt2, control signal Vp is constant, voltage
The output signal Vg2 of control circuit does not also change, and final stage power amplifier pipe works normally；When power amplifier temperature is not less than temperature threshold
When reference value, control signal Vp jump, the output signal Vg2 of voltage control circuit becomes smaller by preset ratio, final stage power amplifier pipe
Quiescent current becomes smaller, and the power consumption of entire power amplifier also becomes smaller.
Further, the voltage control circuit uses digital circuit, differential mainly including ADC, DAC and single-chip microcontroller
Integrating circuit output control signal Vp input ADC after is converted to digital signal, in numeric field complete signal Vp, signal Vg1 with
Conversion between voltage control circuit output signal Vg2 finally by DAC output signal Vg2 and controls the static state of final stage power amplifier pipe
Variation.
Further, the voltage control circuit uses analog circuit, mainly includes adder and bleeder circuit, partial pressure
The input of circuit connects output control signal Vp, the first input port of output termination adder；Second input port of adder connects mark
Quasi- voltage Vg1；Adder output signal Vg2 connects final stage power amplifier pipe；When power amplifier temperature is not less than temperature threshold reference value, Vp is jumped
Become, voltage decline, then the Vg2 after bleeder circuit and adder reduces, and the quiescent current of final stage power amplifier pipe becomes smaller.
Further, the voltage control circuit uses analog circuit, it is main include include subtracter and bleeder circuit,
The input of bleeder circuit connects output control signal Vp, the first input port of output termination subtracter；Second input port of subtracter
Meet normal voltage Vg1；Subtracter output signal Vg2 connects final stage power amplifier pipe；When power amplifier temperature is not less than temperature threshold reference value
Vp jump, voltage rise, then the Vg2 after bleeder circuit and subtracter reduces, and the quiescent current of final stage power amplifier pipe becomes smaller.
The power amplifier control method based on auto level control that invention also provides a kind of, this method comprises:
(101), the Current Temperatures of power amplifier are obtained；
(102), the current value of power amplifier input power control signal is calculated according to reference temperature and Current Temperatures；
Reference temperature is the limiting temperature reference value that preset power amplifier can be born, and power amplifier input power control signal is worked as
Preceding value carries out adaptive adjustment according to its initial value and reference temperature and the difference of Current Temperatures, when power amplifier temperature is less than in advance
If power amplifier output power guarantees normally to export function that is constant and reducing power amplifier when being more than preset limiting temperature when limiting temperature
Rate reduces power amplifier temperature；
Calculation is current value=initial value+(reference temperature value-current temperature value) formula (1)
Or current value=initial value-(reference temperature value-current temperature value) formula (2)
(103), the current value that signal is controlled by obtaining power amplifier input power adjusts the input power of power amplifier, to adjust
The power consumption and temperature of power amplifier；
(105), the temperature of power amplifier being detected, the current value that power amplifier input power controls signal enters new calculating,
Until reference temperature value is equal to current temperature value.
As a further preferred solution, increase step (104) between step (103) and (105): adjustment final stage function
The quiescent dissipation for putting pipe controls the current value of signal by power amplifier input power, determines the variation of power amplifier output power, controls function
Putting pipe quiescent current or supply voltage makes the power consumption that can effectively improve power amplifier, so as to improve the temperature of power amplifier.
Further, in step (102), initial value is working as previous time point or a preceding temperature sampling point
Preceding value.
Further, in step (102), reference temperature value and current temperature value multiply identical coefficient, make with reference to temperature
Degree is either matched with the size of power amplifier input power control signal value with the difference of Current Temperatures with initial value.
Further, in step (102), calculation selection depends on the control of power amplifier input power control signal
Mode selects formula (1) if the reduction of power amplifier input power control signal value can be such that power amplifier input power reduces, if power amplifier input power
Control signal value increasing can make the reduction of power amplifier input power then select formula (2).
Further, the mode of power amplifier quiescent dissipation is controlled using the grid voltage of control power tube, when power amplifier inputs
When the current value of power control signal reduces power amplifier output power, the grid voltage for controlling power tube is also subtracted in preset ratio
It is small.
Further, the mode of power tube quiescent dissipation is controlled using the supply voltage of control power tube, when power amplifier is defeated
When entering the current value of power control signal reduces power amplifier output power, the drain voltage for controlling power tube is also subtracted in preset ratio
It is small.
Further, control power tube quiescent dissipation mode can be used control grid voltage and drain voltage combine
Mode when the current value of power amplifier input power control signal reduces power amplifier output power, while controlling grid power supply and drain electrode
Voltage does reasonable adjustment, reduces the quiescent dissipation of power tube.
Correspondingly, the present invention also provides a kind of calculating equipment, comprising:
Memory, for storing program instruction；
Processor executes above-mentioned power amplifier according to the program of acquisition for calling the program instruction stored in the memory
Control method.
Correspondingly, the present invention also provides a kind of computer-readable non-volatile memory medium, including computer-readable finger
It enables, when computer is read and executes the computer-readable instruction, so that computer executes above-mentioned power amplifier control method.
The invention has the benefit that
1, the present invention does not need default ratio using the characteristic of differential integrator circuit and the control program of closed loop, drop power
Column and the not limitation of stepping, the attenuation of differential integrator circuit control attenuator and the quiescent current of power amplifier, make the function of power amplifier
It is maintained at equilibrium state between consumption and temperature, the temperature detection value of power amplifier is equal to temperature threshold reference value at this time, and realizing is allowing
Within the temperature range of export maximum power；
2, the present invention does not need the default than column and operating interval time and drop power number etc., circuit of setting drop power
Delay as low as Millisecond, as long as the temperature detection value of power amplifier not less than the output power for controlling power amplifier as long as temperature threshold reference value and
Quiescent current reduces in the state of current.
3, for the present invention in addition to the method for drop power, the method that additionally using reduces power tube quiescent dissipation reduces power consumption,
It considers traditional scheme and continues to decline power afterwards to a certain degree to power consumption decline influence very little in the decline of power amplifier output power, and
For the high quiescent dissipation of power tube to the linear unfavorable factor instead of power amplifier, initiative applies power amplifier output after power decline
The mode of power and quiescent dissipation linkage allows power amplifier to adjust the static function of power amplifier by preset ratio under the high temperature conditions
Consumption reduces power amplifier module by more power consumptions either to reduce the operating power consumption of power amplifier under conditions of identical output power
It reduces and exports more power under identical power consumption situation；
4, the present invention reduces the operating power consumption of power amplifier using power tube quiescent dissipation is reduced, in minimum output power and most
Power amplifier power consumption under small static state is very small, and the temperature of power amplifier can not use handle already close to power amplifier completely closed state
Power amplifier is protected in the measure that power amplifier is closed, therefore power amplifier can be made to keep certain power output under extreme hot conditions,
Make system holding part communication function.
Detailed description of the invention
Fig. 1 is 1 block diagram of the embodiment of the present invention.
Fig. 2 is 2 block diagram of the embodiment of the present invention.
Fig. 3 is differential integrator circuit diagram of the invention.
Fig. 4 is voltage control circuit schematic diagram of the invention.
Fig. 5 is 1 block diagram of method of the invention.
Fig. 6 is 2 block diagram of method of the invention.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be described in detail:
Embodiment 1: as shown in attached drawing 1,3, a kind of power amplifier control system based on auto level control, including controllable attenuation
Circuit U 1, signal circuit U2, final stage power amplifier pipe U3, temperature sensing circuit U6 and differential integrator circuit U 5, wherein controllably
The first input end of attenuator circuit U1 meets signal input, the output signal Vp of the second input termination differential integrator circuit U 5；Output
Termination signal transmission circuit U2；The input of signal circuit U2 terminates controllable attenuation circuit U 1, output termination final stage power amplifier pipe
U3；The output end of the input termination signal circuit U2 of final stage power amplifier pipe U3, output end are signal output；Temperature sensing circuit
U6 detects its environment temperature, and output end is connect with differential integrator circuit U 5；First input of differential integrator circuit U 5
Output signal Vt1, the second input terminal jointing temp threshold reference value Vt2 of temperature sensing circuit U6 are terminated, output termination is controllable
Second input terminal of attenuator.
In the present embodiment, controllable attenuation circuit U 1 uses voltage-controlled attenuator, and temperature sensing circuit U6 is examined using analog temperature
Survey device, thermistor etc..Differential integrator circuit U 5 includes comparator Q1, capacitor Q2 and resistance Q3, as shown in figure 3, comparator
Input terminal distinguishes jointing temp detected value Vt1 and temperature threshold reference value Vt2；Comparator Q1 is to temperature detection value Vt1 and temperature door
Limit reference value Vt2 is compared, when temperature detection value Vt1 is less than temperature threshold reference value Vt2, comparator output control signal
Vp does not increase the attenuation of controllable attenuation circuit U 1, and output power signal is constant；When temperature detection value Vt1 is more than or equal to temperature door
When limiting reference value Vt2, comparator output control signal Vp jump, two devices of Q2 and Q3 complete the effect of integrating circuit, can be right
The output voltage of comparator does Integral Processing, increases the attenuation of controllable attenuation circuit U 1, and output power signal starts to reduce；When
When temperature detection value Vt1 is greater than temperature threshold reference value Vt2, the control signal of comparator output makes the attenuation of attenuator circuit U1
Reach maximum.In fact, when the temperature of power amplifier is not less than temperature threshold reference value Vt2 and when continuing to increase, differential integrator
Circuit U 5 can continue control in the current attenuation of controllable attenuator circuit U1 and increase decaying, control the drop of power consumption and temperature
Low, the attenuation that the reduction of temperature can promote differential integrator circuit U 5 to control controllable attenuator U1 again reduces, due to differential integrator
The effect of the output integrating circuit of circuit U 5, this process (Millisecond) can reach balance in the reality being exceedingly fast, i.e., currently
Attenuation under power amplifier temperature detection value Vt1 be equal to temperature threshold reference value Vt2 when.Wherein, control signal Vp, which is jumped, includes
The rising of voltage is also possible to voltage decline, depending on the controlled way of controllable attenuation circuit U 1, if controllable attenuation circuit U 1
It is that voltage declines that control voltage decline decaying, which increases and then controls signal Vp jump, if otherwise the control voltage of controllable attenuation circuit U 1
Rising decaying increasing then to control signal Vp jump is that voltage rises.
The present embodiment working principle: the present embodiment passes through controllable attenuation circuit U 1, signal circuit U2, final stage power amplifier pipe
U3, temperature sensing circuit U6 and differential integrator circuit U 5 control the power of input signal, and it is defeated to reduce final stage power amplifier pipe
Out power, reduce the power consumption of final stage power amplifier pipe, so that reaching reduces its mesh for not running under excess temperature environment of power amplifier temperature protection
's；Temperature sensing circuit U6 detects the temperature of power amplifier, and is converted into the first input signal of differential integrator circuit；
The temperature detection value Vt1 and temperature threshold reference value Vt2 of 5 pairs of differential integrator circuit U inputs are compared, according to two kinds of size
Output control signal Vp controls the attenuation of controllable attenuator U1.Controllable attenuation circuit U 1 can receive control signal Vp,
And the adjusting of attenuation is carried out according to control signal Vp.Specific: temperature sensing circuit U6 detects the temperature of power amplifier, and
It is converted into the first input signal Vt1 of differential integrator circuit U 5, differential integrator circuit U 5 receives the temperature of temperature detection chip
Output control signal Vp, works as temperature detection after degree detected value Vt1 and temperature threshold reference value Vt2 and opposite two values are compared
The smaller i.e. power amplifier temperature of value Vt1 controls signal Vp value when relatively low and remains unchanged, the decaying of controllable attenuator U1 at this time
Amount does not change, and the output power of power amplifier is kept constant；When temperature detection value Vt1 is not less than temperature threshold reference value Vt2
Control signal Vp value jumps when power amplifier temperature is equal to threshold temperature, and controllable attenuator U1 is controlled by Vp；If temperature detection value
Vt1 continues to increase, then controllable attenuator U1 is controlled by Vp increases attenuation, and the output power of final stage power amplifier pipe becomes smaller at this time, function
The lower power consumption of pipe is put, the temperature of power amplifier reduces, and temperature detection value Vt1 becomes smaller, and stablizes the temperature of power amplifier in thresholding temperature
On degree；The the dissipating-heat environment of power amplifier the poor then to be controlled by Vp bigger, and attenuation is bigger, and the output power of final stage power amplifier pipe is smaller；One
As in the case of environment temperature increase and radiating condition be deteriorated caused by power amplifier temperature raising all work in this state, controllably
The attenuation of attenuator U1 can be adjusted according to practical situation, and environment temperature is higher and the more poor then attenuation of radiating condition is bigger,
But temperature detection value Vt1 is consistently equal to temperature threshold reference value Vt2, will not it is low will not be high.It will lead in only a kind of situation
The temperature detection value Vt1 of power amplifier is greater than temperature threshold reference value Vt2: the temperature of module is sharply got higher, and power reducing power consumption drops in power amplifier
Measure be temperature reduce need a process, temperature cannot be made to reduce rapidly, but the decaying of controllable attenuator in this case
Amount can directly be increased to the cooling that maximum value makes power amplifier realize maximum speed.In addition, the circuit of the present embodiment is reversible, work as temperature
Controllable attenuator U1 is controlled control signal by Vp when degree reduces and temperature detection value Vt1 is less than temperature threshold reference value Vt2
The control of Vp value is smaller, and attenuation becomes smaller, and the output power of power tube can then increase.
The delay very little of the attenuation control circuit of the present embodiment, therefore quickly to temperature change reaction speed, when high temperature, can
To protect power amplifier well, temperature can also be such that power amplifier restores rapidly when reducing；Directly pass through the control decaying of differential integrator circuit 5
The attenuation of device is delayed small, can adjust in real time the power consumption of power amplifier, and the temperature of module is made to be equal to preset threshold temperature,
It will not be in order to cool down and excessively reduce the power of power amplifier；Sharply getting higher in environment in temperature can also make power amplifier directly with minimum power
Output reduces rapidly the temperature of module, compares and first subtracts preset performance number in traditional scheme and detect temperature again, after several circulations
The controlling mechanism that attenuation is increased again, the present embodiment can also preferably protect power amplifier.
Correspondingly, the present invention also provides a kind of power amplifier control method based on auto level control, as shown in figure 5, should
Method includes the following steps:
Step 101, the Current Temperatures of power amplifier are obtained.
The temperature value of power amplifier can be according to the temperature detection value of step 104 and needing between temperature value for step 102 herein
Do reasonable digital-to-analogue conversion or analog-to-digital conversion；
Step 102, the current value of power amplifier input power control signal is calculated according to reference temperature and Current Temperatures
Reference temperature herein is the limiting temperature reference value that preset power amplifier can be born；Power amplifier input power control letter
It is number in the present invention voltage, the digital signal etc. of control power amplifier input power, can control the size of power amplifier input power；This
The current value of power amplifier input power control signal can be according to the difference of its initial value and reference temperature and Current Temperatures in invention
Adaptive adjustment is carried out, the purpose is to the normal outputs of power amplifier output power guarantee when power amplifier temperature is less than predetermined limit temperature
Power constant and that power amplifier is reduced when being more than preset limiting temperature, reduces power amplifier temperature.
Its calculation is current value=initial value+(reference temperature value-current temperature value) formula (1)
Or current value=initial value-(reference temperature value-current temperature value) formula (2)
Further, calculation selection depends on the control mode of power amplifier input power control signal, if power amplifier inputs
Power control signal values reduction can make the reduction of power amplifier input power then select formula (1), if power amplifier input power control signal value increases
The reduction of power amplifier input power can be made then to select formula (2)；
Further, since the present invention is a closed-loop system, initial value here is previous time point or previous
The current value of secondary temperature sampling point；
Further, identical coefficient can be multiplied according to practical application, reference temperature value and current temperature value, it is therefore an objective to protect
Card reference temperature is either matched with the size of power amplifier input power control signal value with the difference of Current Temperatures with initial value, is protected
Demonstrate,prove the validity and stability of the current value of power amplifier input power control signal；
Further, the power amplifier input power control signal for the effective and stability of calculating and in practical applications
Voltage also has the range of minimax, and the current value in formula needs plus range limits, if power amplifier input power control signal value
Maximum value Vmax and minimum value Vmin.
With formula (1) citing, power amplifier input power controls signal current value and shares three state:
When reference temperature value is greater than Current Temperatures, according to formula (1), power amplifier input power controls the current value of signal always
In propradation, pad value control signal value reaches maximum value Vmax at this time；Power amplifier input power control signal value at this time
Reach maximum, the attenuation of attenuator is minimum, power amplifier output power be maintained at normally export it is constant；Illustrate power amplifier temperature at this time
Normally, power amplifier works under normal circumstances.
When reference temperature value is equal to Current Temperatures, according to formula (1), the current value of power amplifier input power control signal is in
The current value of stable state, the signal of power amplifier input power control at this time is between maximum value Vmax and minimum value Vmin；At this time
Attenuator has certain attenuation, and the output power of power amplifier has certain decline；Illustrate that the working environment of power amplifier at this time deteriorates, but
It can work normally in the case where sacrificing power amplifier output power.
When reference temperature value is less than Current Temperatures, according to formula (1), power amplifier input power controls the current value of signal always
Speed in decline state and the bigger decline of current temperature value is faster, can be more preferable with regard in if temperature sharply deteriorates
Protection power amplifier；When the current value of power amplifier input power control signal reaches minimum value Vmin, the output power of power amplifier is minimum,
Power amplifier is worked with minimum power consumption；
Step 103, power amplifier input power is adjusted, the power consumption and temperature of power amplifier are optimized.
The current value that signal is controlled by obtaining power amplifier input power adjusts the input power of power amplifier, to adjust power amplifier
Power consumption and temperature；
Step 104, the temperature of power amplifier is detected.
Current power amplifier temperature is detected with temperature detection device；Optionally, temperature detection device may include temperature
Spend sensor and thermistor；
Here the case where power amplifier input power being made to reduce with the reduction of power amplifier input power control signal value, selecting type (1)
The method realized to system explains:
Firstly, system worked well, detects power amplifier temperature, and when reference temperature value is greater than Current Temperatures at this time, root
According to formula (1), the current value of power amplifier input power control signal is constantly in propradation, and quickly reaches the maximum value of setting
It Vmax and remains unchanged, the attenuation of attenuator is minimum at this time, and it is (normal defeated that power amplifier output power is maintained at peak power output
Out).When temperature is gradually increasing and reference temperature value is made to be equal to Current Temperatures, according to formula (1), power amplifier input power controls signal
Current value be in the critical state of maximum value Vmax, if temperature continues to rise, power amplifier input power controls the current of signal
Value is in decline state and the speed of the bigger decline of current temperature value is faster, the current value of the signal of power amplifier input power control at this time
Reduce, power amplifier output power declines while causing the decline of power amplifier temperature；Since system is closed-loop system, power amplifier input power control
The current value of signal processed enters new calculating, until reference temperature value is equal to current temperature value；Power amplifier input power controls at this time
The current value of signal is between maximum value Vmax and minimum value Vmin, and the output power of power amplifier has certain decline, but power amplifier
Temperature stabilization does not continue to deteriorate in limiting temperature, makes system that can continue work in the case where sacrificing certain output power
Make.
System of the invention is reversible, when power amplifier temperature declines when being less than reference temperature, according to formula (1), power amplifier
The current value of input power control signal is in propradation, and the current value of power amplifier input power control signal is gradually increased,
The output power and temperature of power amplifier are also gradually increased, until the current value of power amplifier input power control signal reenters stable shape
State even restores normal working condition (power amplifier exports normal power, and the current temperature of power amplifier is less than limiting temperature).
Relative to traditional temperature detection and protection scheme, closed-loop adaptation detection system and power amplifier input work of the invention
The calculation of rate control signal current value can make under high temperature environment the temperature of module be rapidly reduced to preset limiting temperature,
It will not be in order to cool down and excessively reduce the power of power amplifier；Sharply getting higher in environment in temperature simultaneously can also make power amplifier directly with minimum
Power output reduces rapidly the temperature of module, preferably achievees the purpose that protect power amplifier.
Embodiment 2: as shown in Fig. 2, on the basis of embodiment 1 further including voltage control circuit U4, voltage control circuit
The first input port of U4 meets normal voltage Vg1, and the second input port connects the delivery outlet of differential integrator circuit U 5, receives control signal
Vp；The delivery outlet of voltage control circuit U4 connects the power inlet of final stage power amplifier pipe U3；The power port of final stage power amplifier pipe connects voltage
Control the output signal Vg2 of electricity U4.
In the present embodiment, voltage control circuit U4 has the interchangeability of digital circuit and analog circuit, as shown in figure 4, number
The voltage control circuit of word circuit form includes ADC, DAC and single-chip microcontroller Q5 and 2 input signals Vp and Vg1；Wherein Vp is
The output of differential integrator circuit controls signal；Vg1 is the digital value of the control voltage of final stage power amplifier pipe under normal temperature；Vg2 is
The control voltage of final stage power amplifier pipe；Q4 is analog-digital converter, completes analog-digital conversion function, Vp is converted into digital signal and is inputted
Give single-chip microcontroller Q5；Q5 is single-chip microcontroller, according to the two of input signals Vp and Vg1, exports final stage according to scheduled rule or algorithm
The digital value Vg3 of power amplifier control voltage；Q6 is digital analog converter, and the output signal Vg3 of single-chip microcontroller is converted to analog signal
Vg2；Differential integrator circuit output control signal Vp input ADC after be converted to digital signal, in numeric field complete Vp, Vg1 with
Voltage control circuit exports the conversion between Vg2, finally exports Vg2 by DAC and controls the static change of final stage power amplifier pipe U3.
Alternatively, voltage control circuit U4 can also use analog circuit, a kind of mode be include adding
Musical instruments used in a Buddhist or Taoist mass, bleeder circuit etc., the input of bleeder circuit connect output control signal Vp, the first input port of output termination adder；Add
Second input port of musical instruments used in a Buddhist or Taoist mass meets normal voltage Vg1；Adder output signal Vg2 connects final stage power amplifier pipe.It is not less than in power amplifier temperature
Vp is jumped when temperature threshold reference value, and voltage decline, then the Vg2 after bleeder circuit and adder reduces, final stage power amplifier pipe
Quiescent current become smaller.Another way be include subtracter, bleeder circuit etc., the input of bleeder circuit connects output control signal
Vp, the first input port of output termination subtracter；Second input port of subtracter meets normal voltage Vg1；Subtracter output signal
Vg2 connects final stage power amplifier pipe.When power amplifier temperature is not less than temperature threshold reference value, Vp is jumped, and voltage rises, then by partial pressure electricity
Vg2 behind road and subtracter reduces, and the quiescent current of final stage power amplifier pipe becomes smaller.
The present embodiment working principle: the present embodiment receives control signal Vp by voltage control circuit U4, when power amplifier temperature
When less than temperature threshold reference value, control signal Vp is constant, and the output signal Vg2 of voltage control circuit U4 does not also change,
Final stage power amplifier pipe works normally.When power amplifier temperature is not less than temperature threshold reference value, control signal Vp jump, voltage control electricity
The output signal Vg2 of road U4 can pacify preset ratio and become smaller, and the quiescent current of final stage power amplifier pipe becomes smaller, and the power consumption of entire power amplifier also becomes
It is small, it can further improve the power consumption index of power amplifier；At this time since Vp is jumped, the attenuation of controllable attenuation electric current U1 is larger, leads
Cause final stage power amplifier pipe U3 output power decline, therefore the quiescent current of final stage power amplifier pipe U3 rationally reduces will not cause output letter
Number linear deterioration, simultaneously because final stage power amplifier pipe U3 is to the positive effect for reducing power consumption, in the case where reducing identical consumption conditions, this
Embodiment can be obviously reduced relative to the attenuation of first embodiment controllable attenuation circuit, the power of power amplifier output signal
It can be obviously improved.Specific: temperature sensing circuit U6 detects the temperature of power amplifier, and is converted into differential integrator electricity
The first input signal Vt1 of road U5, differential integrator circuit U 5 receive the temperature detection value Vt1 and temperature threshold of temperature detection chip
Output control signal Vp after reference value Vt2 and opposite two values are compared, when the smaller i.e. power amplifier temperature of temperature detection value Vt1
It is to remain unchanged that signal Vp value is controlled when relatively low, and the attenuation of controllable attenuator U1 does not change at this time, power tube
Quiescent current also remain unchanged, the output power of final power amplifier is kept constant；When temperature detection value Vt1 joins equal to temperature threshold
Control signal Vp value jumps when examining value Vt2 i.e. power amplifier temperature equal to threshold temperature, controllable attenuator U1 and voltage control electricity
Road starts to be controlled by Vp；If temperature detection value Vt1 continues to increase, controllable attenuator U1 is controlled by Vp increases attenuation, at this time
The output power of final stage power amplifier pipe becomes smaller, the lower power consumption of power tube, and the temperature of power amplifier reduces, and temperature detection value Vt1 becomes smaller, most
Stablize the temperature of power amplifier in threshold temperature；The the dissipating-heat environment of power amplifier the poor then to be controlled by Vp bigger, and attenuation is bigger, end
The output power of grade power tube is smaller；The output voltage Vg2 of the voltage control circuit U4 controlled simultaneously by Vp is become by preset ratio
It is small, cause the grid voltage of final stage power amplifier pipe to decline, the power consumption of final stage power amplifier pipe can also declined；Two kinds of operations all make final stage function
The power consumption decline of pipe is put, so that making the temperature of power amplifier reduces, temperature detection value Vt1 becomes smaller, and finally stablizes the temperature of power amplifier
In threshold temperature；The present embodiment does not change relative to the control of first embodiment controllable attenuation circuit, but due to increasing
Static optimization of the voltage control circuit U4 to final stage power amplifier pipe, the power consumption of power amplifier module substantially reduce, and the temperature of power amplifier can be with
It is decreased obviously, to reduce the attenuation of controllable attenuation module, is obviously improved the power amplifier output power under identical power consumption；
Meanwhile in the case where the decline of the output power of final stage power amplifier pipe U3, the quiescent current of final stage power amplifier pipe U3 rationally reduces will not
Cause the deterioration of output signal linearity.
Relative to traditional scheme, this programme will not cause in view of reasonably reducing quiescent current when reducing power amplifier power
The linear deterioration of power amplifier can but greatly reduce the power consumption of power amplifier, so that power tube static state regulatory function is increased, in identical output
More power amplifier power consumptions are reduced under power situation either retains bigger output work in the case where reducing identical power amplifier power consumption situation
Rate.The attenuation of the controllable attenuator of this programme reaches maximum under extreme case, and the quiescent current of power tube also will be greatly reduced,
It is minimized the power consumption of power amplifier, the temperature of power amplifier is also close to the power amplifier temperature under completely closed state, but it can also retain
Certain output power makes entire communication system that can also retain part communication capacity, subtracts relative to traditional power amplifier in output power
The scheme of small complete meeting contract fully power amplifier rear to a certain degree is one and greatly improves.
Correspondingly, the present invention also provides the second power amplifier control method based on auto level control, as shown in fig. 6,
The difference of this method and first method is: in the input power of former step 103 adjustment power amplifier, optimizing the power consumption and temperature of power amplifier
The quiescent dissipation for having increased adjustment final stage power amplifier pipe newly is increased later, the step of the power consumption and temperature of depth optimization power amplifier；
Step 101, the Current Temperatures of power amplifier are obtained.
The temperature value of power amplifier can be according to the temperature detection value of step 104 and needing between temperature value for step 102 herein
Do reasonable digital-to-analogue conversion or analog-to-digital conversion；
Step 102, the current value of power amplifier input power control signal is calculated according to reference temperature and Current Temperatures.
Reference temperature herein is the limiting temperature reference value that preset power amplifier can be born；Power amplifier input power control letter
It is number in the present invention voltage, the digital signal etc. of control power amplifier input power, can control the size of power amplifier input power；This
The current value of power amplifier input power control signal can be according to the difference of its initial value and reference temperature and Current Temperatures in invention
Adaptive adjustment is carried out, the purpose is to the normal outputs of power amplifier output power guarantee when power amplifier temperature is less than predetermined limit temperature
Power constant and that power amplifier is reduced when being more than preset limiting temperature, reduces power amplifier temperature.
Its calculation is current value=initial value+(reference temperature value-current temperature value) formula (3)
Or current value=initial value-(reference temperature value-current temperature value) formula (4)
Further, calculation selection depends on the control mode of power amplifier input power control signal, if power amplifier inputs
Power control signal values reduction can make the reduction of power amplifier input power then select formula (3), if power amplifier input power control signal value increases
The reduction of power amplifier input power can be made then to select formula (4)；
Further, since the present invention is a closed-loop system, initial value here is previous time point or previous
The current value of secondary temperature sampling point；
Further, identical coefficient can be multiplied according to practical application, reference temperature value and current temperature value, it is therefore an objective to protect
Card reference temperature is either matched with the size of power amplifier input power control signal value with the difference of Current Temperatures with initial value, is protected
Demonstrate,prove the validity and stability of the current value of power amplifier input power control signal；
Further, the power amplifier input power control signal for the effective and stability of calculating and in practical applications
Voltage also has the range of minimax, and the current value in formula needs plus range limits, if power amplifier input power control signal value
Maximum value Vmax and minimum value Vmin.
With formula (3) citing, power amplifier input power controls signal current value and shares three state:
When reference temperature value is greater than Current Temperatures, according to formula (3), power amplifier input power controls the current value of signal always
In propradation, pad value control signal value reaches maximum value Vmax at this time；Power amplifier input power control signal value at this time
Reach maximum, the attenuation of attenuator is minimum, power amplifier output power be maintained at normally export it is constant；Illustrate power amplifier temperature at this time
Normally, power amplifier works under normal circumstances.
When reference temperature value is equal to Current Temperatures, according to formula (3), the current value of power amplifier input power control signal is in
The current value of stable state, the signal of power amplifier input power control at this time is between maximum value Vmax and minimum value Vmin；At this time
Attenuator has certain attenuation, and the output power of power amplifier has certain decline；Illustrate that the working environment of power amplifier at this time deteriorates, but
It can work normally in the case where sacrificing power amplifier output power.
When reference temperature value is less than Current Temperatures, according to formula (3), power amplifier input power controls the current value of signal always
Speed in decline state and the bigger decline of current temperature value is faster, can be more preferable with regard in if temperature sharply deteriorates
Protection power amplifier；When the current value of power amplifier input power control signal reaches minimum value Vmin, the output power of power amplifier is minimum,
Power amplifier is worked with minimum power consumption；
Step 103, power amplifier input power is adjusted, the power consumption and temperature of power amplifier are optimized.
The current value that signal is controlled by obtaining power amplifier input power adjusts the input power of power amplifier, to adjust power amplifier
Power consumption and temperature；
Step 104, the quiescent dissipation of power tube, the power consumption and temperature of depth optimization power amplifier are adjusted.
The quiescent dissipation of power tube=quiescent current * supply voltage；The quiescent current and supply voltage of power tube in power amplifier
Typically fixed and resulting power consumption is bigger, and big Static Electro is generally had to when power tube exports high-power
Stream and supply voltage guarantee the normal work of power tube, but power tube quiescent current and supply voltage in small-power output
Appropriateness reduces the normal work for not influencing power tube, and the power consumption of power tube can be effectively reduced.Therefore, pass through power amplifier input work
Rate controls the current value of signal, determines the variation of power amplifier output power, controls the reasonable of power tube quiescent current or supply voltage
The power consumption that can effectively improve power amplifier is set, so as to improve the temperature of power amplifier；
Further, the mode for controlling power amplifier quiescent dissipation can be the grid voltage of control power tube, when power amplifier inputs
When the current value of power control signal reduces power amplifier output power, the grid voltage of power tube can control also in preset ratio
Reduce, optimize the quiescent dissipation of power tube, which needs to be determined according to the characteristic of practical power tube.
Further, the mode for controlling power tube quiescent dissipation can be the supply voltage of control power tube, when power amplifier is defeated
When entering the current value of power control signal reduces power amplifier output power, the drain voltage of power tube can control also by preset ratio
Example reduces, and optimizes the quiescent dissipation of power tube, which needs to be determined according to the characteristic of practical power tube.
Further, the mode for controlling power tube quiescent dissipation can be the side that control grid voltage and drain voltage combine
Formula when the current value of power amplifier input power control signal reduces power amplifier output power, while controlling grid power supply and drain electrode electricity
Pressure does reasonable adjustment, reduces the quiescent dissipation of power tube；It is minimum that this method can be such that the power consumption of power tube is reduced to.
Step 105, the temperature of power amplifier is detected.
It is detected with the current power amplifier temperature of temperature detection device degree；Optionally, temperature detection device may include temperature
Spend sensor and thermistor；
Here the case where power amplifier input power being made to reduce with the reduction of power amplifier input power control signal value, selecting type (3),
The method realized to system explains:
Firstly, system worked well, detects power amplifier temperature, and when reference temperature value is greater than Current Temperatures at this time, root
According to formula (3), the current value of power amplifier input power control signal is constantly in propradation, and quickly reaches the maximum value of setting
It Vmax and remains unchanged, the attenuation of attenuator is minimum at this time, and it is (normal defeated that power amplifier output power is maintained at peak power output
Out).When temperature is gradually increasing and reference temperature value is made to be equal to Current Temperatures, according to formula (1), power amplifier input power controls signal
Current value be in the critical state of maximum value Vmax, if temperature continues to rise, power amplifier input power controls the current of signal
Value is in decline state and the speed of the bigger decline of current temperature value is faster, the current value of the signal of power amplifier input power control at this time
Reduce, power amplifier output power declines while causing the decline of power amplifier temperature；The signal current value of power amplifier input power control simultaneously
Reduction decreases the quiescent dissipation of power tube also, and the power consumption of entire power amplifier can further decrease；Since system is closed loop
System, the current value that power amplifier input power controls signal enters new calculating, until reference temperature value is equal to current temperature value；This
The current value of Shi Gongfang input power control signal is between maximum value Vmax and minimum value Vmin, and the output power of power amplifier has
Certain decline, but the temperature stabilization of power amplifier does not continue to deteriorate in limiting temperature, and system is made to sacrifice certain output power
In the case where can work on.
System of the invention is reversible, when power amplifier temperature declines when being less than reference temperature, according to formula (1), power amplifier
The current value of input power control signal is in propradation, and the current value of power amplifier input power control signal is gradually increased,
The output power and temperature of power amplifier are also gradually increased, until the current value of power amplifier input power control signal reenters stable shape
State even restores normal working condition (power amplifier exports normal power, and the current temperature of power amplifier is less than limiting temperature).
Relative to first method, this method is inversely proportional in view of the efficiency and the output power of power amplifier of power amplifier, i.e. power amplifier
Its smaller efficiency of output power is poorer, when power amplifier output power reduce to a certain extent after power amplifier output power reduction not
Apparent lower can be generated to power consumption；Simultaneously, it is contemplated that power tube, which reasonably reduces quiescent dissipation when drop volume exports, to be drawn
It plays the linear deterioration of power amplifier and lacks the power consumption that power amplifier can be greatly reduced；The initiative power tube quiescent dissipation that increases adjusts function
Can, more power amplifier power consumptions are reduced in identical output power either to be retained in the case where reducing identical power amplifier power consumption situation
More output powers.This method reduces the input power of power amplifier under extreme case, and the quiescent dissipation for reducing power tube can make function
The power consumption put is minimized (close to power amplifier closed state), but it can also retain certain output power, make entire communication system
Part communication capacity can also be retained by uniting, just must complete meeting contract fully after output power reduces to a certain degree relative to conventional method
The method of power amplifier is one and greatly improves.
It is understood that it will be understood by those skilled in the art that being subject to technical solution of the present invention and inventive concept
It all should fall within the scope of protection of the appended claims of the present invention with replacement or change.
Claims (19)
1. a kind of power amplifier control system based on auto level control, it is characterised in that: mainly include controllable attenuation circuit, signal
Transmission circuit, final stage power amplifier pipe, differential integrator circuit and temperature sensing circuit, wherein the first input end of controllable attenuation circuit connects
The output of signal input, the second input termination differential integrator circuit of controllable attenuation circuit controls signal Vp, controllable attenuation circuit
Output terminate signal circuit input terminal, signal circuit output termination final stage power amplifier pipe input terminal, final stage function
Pipe output end is put as signal output；Temperature sensing circuit is used for the detection of power amplifier temperature, the first input end of differential integrator circuit
The output signal Vt1, the second input terminal jointing temp threshold reference value Vt2 of jointing temp detection circuit；Differential integrator circuit is to input
Temperature detection value Vt1 and temperature threshold reference value Vt2 be compared, control signal Vp is exported to controllably declining according to comparison result
The attenuation for subtracting device is controlled.
2. the power amplifier control system according to claim 1 based on auto level control, it is characterised in that: the differential product
Parallel circuit mainly includes comparator, and comparator input terminal distinguishes jointing temp threshold reference value Vt2 and temperature sensing circuit output end
Temperature detection value Vt1；When temperature detection value Vt1 is less than temperature threshold reference value Vt2, comparator output control signal Vp is not
The attenuation of controllable attenuation circuit is increased, output power signal is constant；When temperature detection value Vt1 is referred to more than or equal to temperature threshold
When value Vt2, comparator output control signal Vp jump increases the attenuation of controllable attenuation circuit, output power signal starts to subtract
It is small, so that temperature detection value Vt1 is equal to temperature threshold reference value Vt2.
3. the power amplifier control system according to claim 2 based on auto level control, it is characterised in that: the differential product
The output signal Vp jump of parallel circuit includes voltage rising or voltage decline, if the control voltage of controllable attenuation circuit declines decaying
It is that voltage declines, otherwise rises if decaying increases if the control voltage of controllable attenuation circuit and control that increasing, which then controls signal Vp jump,
Signal Vp jump is that voltage rises.
4. the power amplifier control system according to claim 1 or 2 based on auto level control, it is characterised in that: it is described can
Controlling attenuator circuit includes voltage-controlled attenuator.
5. the power amplifier control system according to claim 1 based on auto level control, it is characterised in that: the temperature inspection
Slowdown monitoring circuit includes analog temperature detection device or thermistor.
6. the power amplifier control system according to claim 1 based on auto level control, it is characterised in that: further include voltage
Control circuit, the first input end of voltage control circuit connect normal voltage Vg1, the output of the second input termination differential integrator circuit
Control signal Vp, the output signal Vg2 of the power supply termination voltage control circuit of final stage power amplifier pipe；When power amplifier temperature is less than temperature door
When limiting reference value Vt2, control signal Vp is constant, and the output signal Vg2 of voltage control circuit does not also change, final stage power amplifier pipe
It works normally；When power amplifier temperature is not less than temperature threshold reference value, control signal Vp jump, the output letter of voltage control circuit
Number Vg2 becomes smaller by preset ratio, and the quiescent current of final stage power amplifier pipe becomes smaller, and the power consumption of entire power amplifier also becomes smaller.
7. the power amplifier control system according to claim 6 based on auto level control, it is characterised in that: the voltage control
Circuit processed uses digital circuit, mainly includes ADC, DAC and single-chip microcontroller, and differential integrator circuit output controls signal Vp and inputs ADC
After be converted to digital signal, completed between signal Vp, signal Vg1 and voltage control circuit output signal Vg2 in numeric field
Conversion finally by DAC output signal Vg2 and controls the static change of final stage power amplifier pipe.
8. the power amplifier control system according to claim 6 based on auto level control, it is characterised in that: the voltage control
Circuit processed uses analog circuit, mainly includes adder and bleeder circuit, the input of bleeder circuit meets output control signal Vp, defeated
The first input port of adder is terminated out；Second input port of adder meets normal voltage Vg1；Adder output signal Vg2 connects
Final stage power amplifier pipe；When power amplifier temperature is not less than temperature threshold reference value, Vp is jumped, voltage decline, then passes through bleeder circuit and add
Vg2 after musical instruments used in a Buddhist or Taoist mass reduces, and the quiescent current of final stage power amplifier pipe becomes smaller.
9. the power amplifier control system according to claim 6 based on auto level control, it is characterised in that: the voltage control
Circuit processed uses analog circuit, and main includes including subtracter and bleeder circuit, and the input of bleeder circuit connects output control signal
Vp, the first input port of output termination subtracter；Second input port of subtracter meets normal voltage Vg1；Subtracter output signal
Vg2 connects final stage power amplifier pipe；When power amplifier temperature is not less than temperature threshold reference value, Vp is jumped, and voltage rises, then by partial pressure electricity
Vg2 behind road and subtracter reduces, and the quiescent current of final stage power amplifier pipe becomes smaller.
10. a kind of power amplifier control method based on auto level control, it is characterised in that: this method comprises:
(101), the Current Temperatures of power amplifier are obtained；
(102), the current value of power amplifier input power control signal is calculated according to reference temperature and Current Temperatures；
Reference temperature is the limiting temperature reference value that preset power amplifier can be born, and power amplifier input power controls the current value of signal
Adaptive adjustment is carried out according to its initial value and reference temperature and the difference of Current Temperatures, when power amplifier temperature is less than default pole
Power amplifier output power guarantees normally to export power that is constant and reducing power amplifier when being more than preset limiting temperature, drop when limiting temperature
Low power amplifier temperature；
Calculation is current value=initial value+(reference temperature value-current temperature value) formula (1)
Or current value=initial value-(reference temperature value-current temperature value) formula (2)
(103), the current value that signal is controlled by obtaining power amplifier input power adjusts the input power of power amplifier, to adjust power amplifier
Power consumption and temperature；
(104), the temperature of power amplifier being detected, the current value that power amplifier input power controls signal enters new calculating, until
Reference temperature value is equal to current temperature value.
11. the power amplifier control method according to claim 10 based on auto level control, which is characterized in that in step
(103) increase step between (104): the quiescent dissipation of adjustment final stage power amplifier pipe controls signal by power amplifier input power
Current value determines the variation of power amplifier output power, and controlling power tube quiescent current or supply voltage makes to can effectively improve power amplifier
Power consumption, so as to improve the temperature of power amplifier.
12. the power amplifier control method described in 0 or 11 based on auto level control according to claim 1, it is characterised in that: in step
Suddenly in (102), initial value is the current value at previous time point or preceding temperature sampling point.
13. the power amplifier control method described in 0 or 11 based on auto level control according to claim 1, it is characterised in that: in step
Suddenly in (102), reference temperature value and current temperature value multiply identical coefficient, make reference temperature and the difference of Current Temperatures and initial
Value is either matched with the size of power amplifier input power control signal value.
14. the power amplifier control method described in 0 or 11 based on auto level control according to claim 1, it is characterised in that: in step
Suddenly in (102), calculation selection depends on the control mode of power amplifier input power control signal, if power amplifier input power controls
Signal value reduction can make the reduction of power amplifier input power then select formula (1), if the increasing of power amplifier input power control signal value can make power amplifier
Formula (2) are then selected in input power reduction.
15. the power amplifier control method according to claim 11 based on auto level control, it is characterised in that: control power amplifier
The mode of quiescent dissipation is using the grid voltage for controlling power tube, when the current value of power amplifier input power control signal reduces power amplifier
When output power, the grid voltage for controlling power tube is also reduced in preset ratio.
16. the power amplifier control method according to claim 11 based on auto level control, it is characterised in that: control power amplifier
The mode of pipe quiescent dissipation is using the supply voltage for controlling power tube, when the current value of power amplifier input power control signal reduces function
When putting output power, the drain voltage for controlling power tube is also reduced in preset ratio.
17. the power amplifier control method according to claim 11 based on auto level control, it is characterised in that: control power amplifier
The mode that control grid voltage and drain voltage combine can be used in the mode of pipe quiescent dissipation, when power amplifier input power controls signal
Current value when reducing power amplifier output power, while controlling grid power supply and drain voltage does reasonable adjustment, reduce power tube
Quiescent dissipation.
18. a kind of calculating equipment characterized by comprising
Memory, for storing program instruction；
Processor requires 10-17 according to the program execution benefit of acquisition for calling the program instruction stored in the memory
Described in any item methods.
19. a kind of computer-readable non-volatile memory medium, it is characterised in that: including computer-readable instruction, work as computer
When reading and executing the computer-readable instruction, so that computer executes such as the described in any item methods of claim 10-17.
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| PCT/CN2019/129417 WO2020253202A1 (en) | 2019-06-17 | 2019-12-27 | Power amplifier control system and method employing automatic level control |
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| WO2022088524A1 (en) * | 2020-10-29 | 2022-05-05 | 三维通信股份有限公司 | Over-temperature power automatic adjustment method and apparatus, and storage medium |
| CN114265450A (en) * | 2021-12-22 | 2022-04-01 | 杭州长川科技股份有限公司 | Output control method and device of high-power amplifier and electronic equipment |
| CN114265450B (en) * | 2021-12-22 | 2023-01-20 | 杭州长川科技股份有限公司 | Output control method and device of high-power amplifier and electronic equipment |
| CN114506243A (en) * | 2022-01-26 | 2022-05-17 | 北京海博思创科技股份有限公司 | Power control method of vehicle-mounted battery system and vehicle-mounted battery management device |
| CN114506243B (en) * | 2022-01-26 | 2024-01-23 | 北京海博思创科技股份有限公司 | Power control method for vehicle-mounted battery system and vehicle-mounted battery management device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110351630B (en) | 2021-03-16 |
| WO2020253202A1 (en) | 2020-12-24 |
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