CN206585532U - A kind of power amplifier - Google Patents
A kind of power amplifier Download PDFInfo
- Publication number
- CN206585532U CN206585532U CN201720141509.7U CN201720141509U CN206585532U CN 206585532 U CN206585532 U CN 206585532U CN 201720141509 U CN201720141509 U CN 201720141509U CN 206585532 U CN206585532 U CN 206585532U
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- China
- Prior art keywords
- amplifier
- temperature
- circuit
- power amplifier
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of power amplifier, aim to provide a kind of power amplifier with temperature compensation function, the problem of temperature is interfered to circuit is solved, its drip irrigation device is to include input interface and output interface, be connected with turn between input interface and output interface：Attenuator, the first amplifier, wave filter, the second amplifier, the 3rd amplifier, match circuit, the 4th amplifier, isolator, temperature-compensation circuit is connected between the attenuator and the first amplifier.
Description
Technical field
The utility model is related to power amplifier.
Background technology
Power amplifier is the abbreviation of power amplification circuit, is a kind of amplifying circuit for the purpose of exporting relatively high power.It
General direct drive load, load capacity is eager to excel.Output stage of the power amplification circuit usually as multistage amplifier circuit.A lot
In electronic equipment, it is desirable to which the output stage of amplifying circuit can drive certain to load, such as drive instrument, make throw of pointer；Driving
Loudspeaker, is allowed to sounding；Or the executing agency in driving automatic control system etc..In a word, it is desirable to which amplifying circuit has sufficiently large
Power output.Such amplifying circuit is referred to as power amplification circuit.
The Chinese patent of existing Application No. 201420535525.0 discloses a kind of data based on big-dipper satellite and sent eventually
End, including：Embedded signal processor and transmitting antenna, between the two provided with modulator, upconverter and power amplifier, and also
Provided with a frequency source, it is connected with upconverter and embedded signal processor.
According to its patent, sent in big-dipper satellite data needs to use power amplifier in terminal.But it is existing
Power amplifier is often one-level power amplifier and two grades of power amplifiers, and two grades of power amplifier primary structures are the series connection structures by two amplifiers
Into.
At present, find in the power amplifier course of work, for two grades or multistage power amplifier presence heating it is existing
As, this fever phenomenon is also that comparison is normal, but is due to that ambient temperature is too high, is that can influence the stability of power amplifier performance, by
This needs to carry out effective improvement to some big power amplifiers.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide the power amplifier electricity with temperature compensation function
Road.
Above-mentioned technical purpose of the present utility model technical scheme is that：A kind of power amplifier, bag
Input interface and output interface are included, is connected with turn between input interface and output interface：Attenuator, the first amplifier, filter
Ripple device, the second amplifier, the 3rd amplifier, match circuit, the 4th amplifier, isolator, the attenuator and the first amplifier
Between be connected with temperature-compensation circuit.
By above-mentioned setting, amplified using level Four, high-gain can be achieved and high-power, be additionally provided with temperature-compensation circuit,
Temperature-compensating is carried out to device；It is well known that hot environment influences larger, particularly powerful amplification to amplifier performance
Device, the power amplifier of this programme employs four amplifiers, and when external environment is in high temperature, power output can be reduced, so that
Cause amplifier cisco unity malfunction, add temperature-compensation circuit, the work electricity of input when temperature is too high, can be improved
Pressure, so as to ensure its normal work.
Can be preferably as concrete scheme of the present utility model：The temperature-compensation circuit includes the first inductance, first
Resistance, second resistance, 3rd resistor, thermistor, the first electric capacity；
One end of first resistor is to receive direct current signal, other end connection thermistor one end, first electric capacity one end, the
Two resistance one end, 3rd resistor one end；
The other end of thermistor connects the first electric capacity other end, the second resistance other end, earth terminal；
The other end of 3rd resistor connects one end of the first inductance；
Tie point between the other end connection attenuator of first inductance and the first amplifier.
By above-mentioned setting, using this circuit, the operation principle of device temperature-compensating is：Using the characteristic of thermistor, when
When external environment is in the condition of high temperature, thermistor resistance diminishes, and the operating voltage of the first amplifier becomes big, so as to improve amplification
The power output of circuit, so as to ensure that its normal work, it is to avoid disturbed by temperature.
Can be preferably as concrete scheme of the present utility model：The input interface and output interface are radio day
Line interface.
Pass through above-mentioned setting, in terms of being used primarily in signal transmitting and the receiving circuit of arctic subscriber computer due to this circuit, institute
To provide this radio antenna interface, facilitate the connection of wireless aerial.
Can be preferably as concrete scheme of the present utility model：The temperature-compensation circuit is provided with two, and respectively
Tie point between attenuator and the first amplifier is connected to by first switch and second switch.
By above-mentioned setting, there is provided 2 temperature-compensation circuits, so as to improve the service life of equipment and reduction is safeguarded into
This, can form the structure of the using and the reserved, so as to when one of temperature-compensation circuit goes wrong, can be directly switch into another
One temperature-compensation circuit, will not cause signal interruption to equipment immediately.
Can be preferably as concrete scheme of the present utility model：The first switch is the first tongue tube, second switch
For the second tongue tube, and both are provided with the magnet for controlling one of reed switch conduction.
By above-mentioned setting, tongue tube is controlled, so that the purpose of contactless controlling switch is reached, so that making
User is safer in operation.
In summary, the utility model has the advantages that：High-power output is constituted using multiple amplifiers, is had
The performance of higher gain, also temperature-compensating.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the present embodiment 1；
Fig. 2 is the circuit structure diagram of the present embodiment 2；
Fig. 3 is the circuit structure diagram of the present embodiment 3.
1, attenuator in figure；2nd, temperature-compensation circuit；3rd, magnet；U1, the first amplifier；U2, the second amplifier；U3,
Three amplifiers；U4, the 4th amplifier；U5, wave filter；U6, match circuit；U7, isolator；L1, the first inductance；R1, the first electricity
Resistance；R2, second resistance；R3,3rd resistor；RT, thermistor；C1, the first electric capacity；IN, input interface；OUT, output interface；
K1, first switch；K2, second switch；GH1, the first tongue tube；GH2, the second tongue tube.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1：
A kind of power amplifier, as shown in figure 1, including input interface IN and output interface OUT.Input interface IN and output connect
Mouth OUT is radio antenna interface.SMA is Sub-Miniature-A abbreviation, conventional wireless routing/wireless network card
SMA antennal interface full name should be SMA reversed polarity males, be exactly that antenna terminal is that internal threaded the inside contact is pin（Nothing
Line equipment one end is that outside has contact inside screw thread to be pipe）.The wireless device of this interface be it is most most popular, more than 70%
AP, wireless routing and more than 90% pci interface wireless network card are all to use this interface, and this interface is of moderate size, hand-held
It is much this type that the equipment such as intercom, which also have, but the pin and pipe of the inside are opposite with standard SMA wireless device.Adopt
Include most civil equipment with the wireless aps and wireless routing of this interface.Because this circuit is used primarily in arctic user
In terms of the signal transmitting of machine and receiving circuit, so providing this radio antenna interface, facilitate the connection of wireless aerial.
It is connected with turn between input interface IN and output interface OUT：Attenuator 1, the first amplifier U1, wave filter
U5, the second amplifier U2, the 3rd amplifier U3, match circuit U6, the 4th amplifier U4, isolator U7, attenuator 1 and first are put
Temperature-compensation circuit 2 is connected between big device U1.
Attenuator 1 is a kind of electronic component for providing decay, is widely used in electronic equipment, its main application
It is：（1）The size of signal in adjustment circuit；（2）Improve impedance matching, require there is a more stable load in this circuit
Impedance, so inserting an attenuator 1 between this circuit and actual loading impedance, can buffer the change of impedance.
Wave filter U5 plays a part of being to play a part of a filtering and buffer in this circuit arrangement, and wave filter U5 specifically may be used
To be filtered by capacitor.
Match circuit U6 is constituted for impedance matching circuit U6 of the prior art.Isolator U7 is then to use optical coupling isolator
U7。
Temperature-compensation circuit 2 includes the first inductance L1, first resistor R1, second resistance R2,3rd resistor R3, thermistor
RT, the first electric capacity C1.Thermistor is using NTC models, the temperature profile of this negative thermistor（- 55 degrees Celsius of temperature range
To 315 degrees Celsius, temperature resolution is 6-10 degrees Celsius）.
First resistor R1 one end is to receive direct current signal, other end connection thermistor RT one end, the first electric capacity C1
One end, second resistance R2 one end, 3rd resistor R3 one end；The thermistor RT other end connects the first electric capacity C1 other ends, the
The two resistance R2 other ends, earth terminal；The 3rd resistor R3 other end connects the first inductance L1 one end；First inductance L1's is another
Tie point between the connection attenuator 1 and first amplifier U1 of end.
Operation principle：Amplified using level Four, high-gain can be achieved and high-power, be additionally provided with temperature-compensation circuit 2, to dress
Put carry out temperature-compensating；It is well known that hot environment influences larger, particularly powerful amplifier to amplifier performance, this
The power amplifier of scheme employs four amplifiers, and when external environment is in high temperature, power output can be reduced, so as to cause to put
Big device cisco unity malfunction, adds temperature-compensation circuit 2, when temperature is too high, can improve the operating voltage of input, so that
Ensure its normal work.Using this circuit, the operation principle of device temperature-compensating is：Using thermistor RT characteristic, work as the external world
When environment is in the condition of high temperature, thermistor RT resistances diminish, and the first amplifier U1 operating voltage becomes big, so as to improve amplification
The power output of circuit, so as to ensure that its normal work, it is to avoid disturbed by temperature.
Embodiment 2：
As described in Figure 2, the output end of temperature-compensation circuit 2 is the first inductance L1 output end.Temperature-compensation circuit 2 is set
Have two, respectively the first temperature-compensation circuit 221 and second temperature compensation circuit 222, and respectively by first switch K1 and
Second switch K2 is connected to the tie point between the amplifier U1 of attenuator 1 and first.First switch K1 and second switch K2 be by
Button.There is provided 2 temperature-compensation circuits 2, so as to improve the service life of equipment and reduce maintenance cost, can form one and use one
Standby structure, so that when one of temperature-compensation circuit 2 goes wrong, another temperature-compensation circuit can be directly switch into
2, signal interruption will not be caused to equipment immediately.
Embodiment 3：
As shown in figure 3, first switch K1 is the first tongue tube GH1, second switch K2 is the second tongue tube GH2, and both
It is provided with the magnet 3 for controlling one of reed switch conduction.When magnet 3 is close to the first tongue tube GH1, then the first tongue tube GH1
Closure；When magnet 3 is close to the second tongue tube GH2, then the second tongue tube GH2 is closed.It is controlled by tongue tube, so as to reach
The purpose of contactless controlling switch, so that user is safer in operation.
This specific embodiment is only to explain of the present utility model, and it is not to limitation of the present utility model, ability
Field technique personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but
As long as all being protected in right of the present utility model by Patent Law.
Claims (5)
1. a kind of power amplifier, including input interface (IN) and output interface (OUT), it is characterised in that at input interface (IN)
It is connected with turn between output interface (OUT)：Attenuator (1), the first amplifier (U1), wave filter (U5), the second amplifier
(U2), the 3rd amplifier (U3), match circuit (U6), the 4th amplifier (U4), isolator (U7), the attenuator (1) and
Temperature-compensation circuit (2) is connected between one amplifier (U1).
2. power amplifier according to claim 1, it is characterised in that：The temperature-compensation circuit (2) includes the first inductance
(L1), first resistor (R1), second resistance (R2), 3rd resistor (R3), thermistor (RT), the first electric capacity (C1)；
One end of first resistor (R1) is to receive direct current signal, other end connection thermistor (RT) one end, the first electric capacity
(C1) one end, second resistance (R2) one end, 3rd resistor (R3) one end；
Other end connection the first electric capacity (C1) other end, second resistance (R2) other end, the earth terminal of thermistor (RT)；
The other end of 3rd resistor (R3) connects one end of the first inductance (L1)；
Tie point between the other end connection attenuator (1) and the first amplifier (U1) of first inductance (L1).
3. power amplifier according to claim 1, it is characterised in that：The input interface (IN) and output interface (OUT)
It is radio antenna interface.
4. power amplifier according to claim 1, it is characterised in that：The temperature-compensation circuit (2) is provided with two, and
The connection between attenuator (1) and the first amplifier (U1) is connected to by first switch (K1) and second switch (K2) respectively
Point.
5. power amplifier according to claim 4, it is characterised in that：The first switch (K1) is the first tongue tube
(GH1), second switch (K2) is the second tongue tube (GH2), and both are provided with the magnet for controlling one of reed switch conduction
(3)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720141509.7U CN206585532U (en) | 2017-02-16 | 2017-02-16 | A kind of power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720141509.7U CN206585532U (en) | 2017-02-16 | 2017-02-16 | A kind of power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206585532U true CN206585532U (en) | 2017-10-24 |
Family
ID=60090575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720141509.7U Expired - Fee Related CN206585532U (en) | 2017-02-16 | 2017-02-16 | A kind of power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206585532U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110708023A (en) * | 2019-09-30 | 2020-01-17 | 南京微通电子技术有限公司 | High-power ultra-bandwidth power amplifier |
-
2017
- 2017-02-16 CN CN201720141509.7U patent/CN206585532U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110708023A (en) * | 2019-09-30 | 2020-01-17 | 南京微通电子技术有限公司 | High-power ultra-bandwidth power amplifier |
| CN110708023B (en) * | 2019-09-30 | 2023-06-09 | 南京微通电子技术有限公司 | High-power ultra-bandwidth power amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171024 Termination date: 20200216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |