CN207251557U - A kind of circuit structure for optimizing power amplifier stability - Google Patents
A kind of circuit structure for optimizing power amplifier stability Download PDFInfo
- Publication number
- CN207251557U CN207251557U CN201721220141.XU CN201721220141U CN207251557U CN 207251557 U CN207251557 U CN 207251557U CN 201721220141 U CN201721220141 U CN 201721220141U CN 207251557 U CN207251557 U CN 207251557U
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- China
- Prior art keywords
- power amplifier
- power
- numerical
- circuit structure
- amplifier unit
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Abstract
The utility model provides a kind of circuit structure for optimizing power amplifier stability, including microcontroller, numerical-control attenuator, power amplifier unit, current detecting chip, power detector and temperature sensor, current detecting chip, power detector and the temperature sensor are connected with the A/D collection end signals of microcontroller, microcontroller also controls connection numerical-control attenuator, the input terminal of the numerical-control attenuator is used to connect transmitting pumping signal input, output terminal connection power amplifier unit.The utility model has the advantage that：The stability of the power amplifier link of this programme greatly improves, and the work efficiency of RF power amplification pipe is also substantially increased while power amplifier link steady operation；Can be to avoid causing chip permanently to damage.
Description
Technical field
The utility model belongs to wireless communication technology field, more particularly, to a kind of circuit knot for optimizing power amplifier stability
Structure.
Background technology
Radio-frequency power amplifier is the core of emitting portion in radio communication, and radio-frequency power amplifier is operated in stable
State is to launch the premise of carrier signal, and traditional method is the stability of boster but significantly by way of negative-feedback
Sacrifice the work efficiency of power tube.
The content of the invention
In view of this, the utility model is directed to a kind of circuit structure for optimizing power amplifier stability, to ensure that chip is steady
Fixed output power, avoids causing chip permanently to damage.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of circuit structure for optimizing power amplifier stability, including microcontroller, numerical-control attenuator, power amplifier unit, current detecting
Chip, power detector and temperature sensor, current detecting chip, power detector and the temperature sensor are and microcontroller
A/D collection end signal connections, microcontroller also controls connection numerical-control attenuator, and the input terminal of the numerical-control attenuator is used to connect
Launch pumping signal input, output terminal connection power amplifier unit.
Further, drain terminal and the supply of leakage pressure of power amplifier unit are connected by choking-winding.
Further, the power detector connects the output terminal of power amplifier unit by directional coupler.
Further, the temperature sensor is installed on the final stage power amplifier chip output structure of power amplifier unit.
Relative to the prior art, the utility model has the advantage that：
(1) stability of the power amplifier link of this programme greatly improves, and is also carried significantly while power amplifier link steady operation
The high work efficiency of RF power amplification pipe；
(2) it can also can well ensure what chip was stablized to avoid causing chip permanently to damage using foregoing circuit
Output power.
Brief description of the drawings
The attached drawing for forming the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The schematic description and description of type is used to explain the utility model, does not form the improper restriction to the utility model.
In attached drawing：
Fig. 1 is the schematic diagram for the circuit structure for optimizing power amplifier stability described in the utility model embodiment；
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of circuit structure for optimizing power amplifier stability, as shown in Figure 1, including microcontroller, numerical-control attenuator, power amplifier list
Member, current detecting chip, power detector and temperature sensor, power amplifier unit are amplifier, push away a grade amplifier, final power in advance
The amplification link that amplifier tandem compound forms；
Feeder ear is Lou pressed to the curent change of load end, the inspection of current detecting chip to detect by the current detecting chip
The analog value measured is sent to the A/D ends of microcontroller in real time, and microcontroller detects the value and judges in real time, if the fluctuating range of the value
Exceed preset range, then turn off the supply of leakage pressure by power switch control chip；
The present embodiment, the supply for leaking pressure are to be connected by way of choking-winding with the drain terminal of power amplifier unit, then well
Isolate DC power supply and radiofrequency signal, avoid transmission of the DC power supply to radio-frequency power.
The power that the power detector carries out power amplifier unit output terminal by directional coupler samples, and π types are passed through in sampling
Attenuator carries out power adjustment and obtains suitable performance number；
The present embodiment power detector selects detector diode, and a DC level is obtained by detector diode detection,
The DC level has one-to-one linear relationship with output power at this time, and the A/D of microcontroller gathers the data and makes a decision,
If it exceeds threshold value then enters attenuator adjustment programme, the size of input stimulus power is adjusted until stable output power；
The real time temperature of the final stage power amplifier chip output structure of power amplifier unit is detected by the temperature sensor, is come
Judge the temperature of power amplifier unit at this time, the A/D of microcontroller gathers the temperature data and makes a decision, if to be given close to power amplifier unit
The fixed heatproof upper limit, likewise enters the attenuator adjustment programme of microcontroller, adjusts the attenuation of numerical-control attenuator, so as to adjust defeated
Enter exciting power size until temperature enters suitable scope.
The model PE4306 of the numerical-control attenuator, for controlling the decay of transmitting pumping signal；Directional coupler is
One section of microstrip coupled line by computer sim- ulation, monitoring and sampling for power amplifier unit output signal；The type of power detector
Number it is HSMS2822, is sampled for power signal.
In normal work, transmitting pumping signal is first fed to numerical-control attenuator, then carries out work(by power amplifier unit
Rate enhanced processing so that transmission power intensity increases in order to expand transmitting boundary.Pass through current detecting chip, power detector
The real-time of electric leakage, power and temperature is detected with temperature sensor, and adjusts declining for numerical-control attenuator in real time according to testing result
Decrement, so as to adjust input stimulus watt level until temperature enters suitable scope.
It is premise that suitable quiescent point, which is set, fluctuation, fluctuation, the change of temperature of input stimulus power of leakage pressure power supply
The instantaneous peak value of change and output power is likely to cause the self-oscillation of power amplifier chips so as to cause power amplifier chips to be damaged, because
This, carries out these variables detection in real time and then the attenuation by adjusting numerical-control attenuator carrys out the steady of hold amplifier work
It is fixed.The output power that chip is stablized can also can well be ensured to avoid causing chip permanently to damage using foregoing circuit.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (4)
- A kind of 1. circuit structure for optimizing power amplifier stability, it is characterised in that：Including microcontroller, numerical-control attenuator, power amplifier unit, Current detecting chip, power detector and temperature sensor,Current detecting chip, power detector and the temperature sensor are connected with the A/D collection end signals of microcontroller, monolithic Machine also controls connection numerical-control attenuator, and the input terminal of the numerical-control attenuator is used to connect transmitting pumping signal input, output terminal Connect power amplifier unit.
- 2. the circuit structure of optimization power amplifier stability according to claim 1, it is characterised in that：Connected by choking-winding The drain terminal of power amplifier unit and the supply of leakage pressure.
- 3. the circuit structure of optimization power amplifier stability according to claim 1, it is characterised in that：The power detector leads to Cross the output terminal of directional coupler connection power amplifier unit.
- 4. the circuit structure of optimization power amplifier stability according to claim 1, it is characterised in that：The temperature sensor peace On the final stage power amplifier chip output structure of power amplifier unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721220141.XU CN207251557U (en) | 2017-09-21 | 2017-09-21 | A kind of circuit structure for optimizing power amplifier stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721220141.XU CN207251557U (en) | 2017-09-21 | 2017-09-21 | A kind of circuit structure for optimizing power amplifier stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207251557U true CN207251557U (en) | 2018-04-17 |
Family
ID=61886210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721220141.XU Active CN207251557U (en) | 2017-09-21 | 2017-09-21 | A kind of circuit structure for optimizing power amplifier stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207251557U (en) |
-
2017
- 2017-09-21 CN CN201721220141.XU patent/CN207251557U/en active Active
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