CN206908577U - A kind of wireless digital power amplification system - Google Patents
A kind of wireless digital power amplification system Download PDFInfo
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- CN206908577U CN206908577U CN201720693021.5U CN201720693021U CN206908577U CN 206908577 U CN206908577 U CN 206908577U CN 201720693021 U CN201720693021 U CN 201720693021U CN 206908577 U CN206908577 U CN 206908577U
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Abstract
The utility model belongs to digital power amplifier technical field, a kind of more particularly to wireless digital power amplification system, described input matching capacitance C1 one end is connected to input build-out resistor R1 one end, the other end of the input build-out resistor R1 is connected to input matching inductance L1 one end, described output matching electric capacity C2 one end is connected to output matching resistance R2 one end, the other end of the output matching resistance R2 is connected to output matching inductance L2 one end, the utility model solves prior art and existed due to impedance mismatching, the problem of so as to cause energy loss in transmission, with solve transmission in energy loss, high input impedance and low output impedance, realize the effect of attenuator, improve the advantageous effects of the receiving sensitivity of wireless transmitting system.
Description
Technical field
The utility model belongs to digital power amplifier technical field, more particularly to a kind of wireless digital power amplification system.
Background technology
Power amplifier, referred to as " power amplifier ", refer under the conditions of given distortion rate, maximum power output can be produced to drive
The amplifier of a certain load, such as loudspeaker, power amplifier serve the hinge of " tissue, coordination " in whole sound system
Effect, can dominate whole system to a certain extent provide good tonequality output, and prior art is present because impedance is lost
Match somebody with somebody, so as to cause transmission in energy loss the problem of.
Utility model content
The utility model provides a kind of wireless digital power amplification system, to solve to propose prior art in above-mentioned background technology
In the presence of due to impedance mismatching, the problem of so as to cause energy loss in transmission.
The technical problem that the utility model solves is realized using following technical scheme：A kind of wireless digital power amplifier system
System, including input matching circuit and output matching circuit and amplifying circuit, the input amplifier are connected to input
With circuit on one side, its output end is connected to output matching circuit one end；
The input matching circuit includes input build-out resistor R1, input matching capacitance C1, input matching inductance L1；
The output matching circuit includes output matching resistance R2, output matching electric capacity C2, output matching inductance L3；
Described input matching capacitance C1 one end is connected to input build-out resistor R1 one end, the input build-out resistor R1's
The other end is connected to input matching inductance L1 one end；
Described output matching electric capacity C2 one end is connected to output matching resistance R2 one end, the output matching resistance R2's
The other end is connected to output matching inductance L2 one end.
Further, the input matching circuit other end is connected to radio frequency source, the output matching circuit other end connection
In load.
Further, the input matching capacitance C1 other ends are connected to radio frequency source one end, the radio frequency source other end connection
In the input matching inductance L1 other end.
Further, the output matching electric capacity C2 other ends are connected to load one end, and the load other end is connected to defeated
Go out the matching inductance L2 other end.
Advantageous effects：
1st, this patent includes input build-out resistor R1, input matching capacitance C1, input using the input matching circuit
With inductance L1, the output matching circuit includes output matching resistance R2, output matching electric capacity C2, output matching inductance L3, institute
State one end that input matching capacitance C1 one end is connected to input build-out resistor R1, the other end connection of the input build-out resistor R1
In input matching inductance L1 one end, described output matching electric capacity C2 one end is connected to output matching resistance R2 one end, described
The output matching resistance R2 other end is connected to output matching inductance L2 one end, because impedance matching refers to transmit in energy
When, it is desirable to the characteristic impedance of load impedance and transmission line is equal, and the energy now transmitted will not produce reflection, nearly all be supported
Absorb, whereas if impedance mismatching, then energy loss is just had in transmission, for the electric current in circuit, during low frequency, electricity
Main inhibition is hindered, and in high frequency, it is also obvious that electric capacity and inductance play inhibition, therefore, in high frequency it is necessary to considering
The resistance matching problem of circuit, the load impedance that load impedance is transformed to match with power amplifier requirement by the system, to ensure to pass
Defeated ceiling capacity, meanwhile, unnecessary each harmonic component is filtered out, the radio-frequency power of required frequency can be obtained with proof load,
Power transmission efficiency with circuit is as high as possible, i.e. the loss of match circuit is small, and impedance matching has 2 kinds of modes：Change
Resistance and adjustment transmission line, wherein, change resistance：It is inductively or capacitively with load in series, that is, increasing or decreasing
The impedance value of load, so from substantially solve transmission in energy loss.
2nd, this patent for amplifying circuit, by the matching of impedance, realizes high input resistance by the matching of impedance
Anti- and low output impedance.
3rd, this patent replaces with two series resistances according to by build-out resistor, can both play a part of Signal Matching,
The effect of attenuator can also be realized simultaneously.
4th, this patent have studied power amplification electricity by experiment of the shock wave test to wireless transmitting system communication distance
Road, low noise amplifier circuit is designed, so as to improve the receiving sensitivity of wireless transmitting system, meet shock wave test to wireless
The requirement of transmission range.
Brief description of the drawings
Fig. 1 is a kind of structural representation of wireless digital power amplification system of the utility model.
Embodiment
The utility model is described further below in conjunction with accompanying drawing：
In figure：1- input matching circuits, 2- output matching circuits, 3- amplifying circuits, 4- radio frequency sources, 5- loads, R1- inputs
Build-out resistor, C1- input matching capacitances, L1- input matching inductances, R2- output matching resistance, C2- output matching electric capacity, L2-
Output matching inductance.
Embodiment：
The present embodiment：As shown in figure 1, a kind of wireless digital power amplification system, including input matching circuit 1 and output matching electricity
Road 2 and amplifying circuit 3, the input of amplifying circuit 3 are connected to the one end of input matching circuit 1, and its output end is connected to defeated
Go out the one end of match circuit 2；
The input matching circuit 1 includes input build-out resistor R1, input matching capacitance C1, input matching inductance L1；
The output matching circuit 2 includes output matching resistance R2, output matching electric capacity C2, output matching inductance L3；
Described input matching capacitance C1 one end is connected to input build-out resistor R1 one end, the input build-out resistor R1's
The other end is connected to input matching inductance L1 one end；
Described output matching electric capacity C2 one end is connected to output matching resistance R2 one end, the output matching resistance R2's
The other end is connected to output matching inductance L2 one end.
The other end of input matching circuit 1 is connected to radio frequency source 4, and the other end of output matching circuit 2 is connected to negative
Carry 5.
The input matching capacitance C1 other ends are connected to the one end of radio frequency source 4, and the other end of radio frequency source 4 is connected to input
The matching inductance L1 other end.
The output matching electric capacity C2 other ends are connected to 5 one end of load, and 5 other ends of the load are connected to output matching
The inductance L2 other end.
Operation principle：
This patent includes input build-out resistor R1, input matching capacitance C1, input matching by the input matching circuit
Inductance L1, the output matching circuit includes output matching resistance R2, output matching electric capacity C2, output matching inductance L3, described
Input matching capacitance C1 one end is connected to input build-out resistor R1 one end, and the other end of the input build-out resistor R1 is connected to
Matching inductance L1 one end is inputted, described output matching electric capacity C2 one end is connected to output matching resistance R2 one end, described defeated
The other end for going out build-out resistor R2 is connected to output matching inductance L2 one end, because impedance matching refers to when energy transmits,
It is required that the characteristic impedance of load impedance and transmission line is equal, the energy now transmitted will not produce reflection, nearly all be supported suction
Receive, whereas if impedance mismatching, then energy loss is just had in transmission, for the electric current in circuit, during low frequency, resistance
Main inhibition is played, and in high frequency, it is also obvious that electric capacity and inductance play inhibition, therefore, in high frequency it is necessary to considering electricity
The resistance matching problem on road, the load impedance that load impedance is transformed to match with power amplifier requirement by the system, to ensure to transmit
Ceiling capacity, meanwhile, unnecessary each harmonic component is filtered out, the radio-frequency power of required frequency, matching can be obtained with proof load
The power transmission efficiency of circuit is as high as possible, i.e. the loss of match circuit is small, and impedance matching has 2 kinds of modes：Change resistance
Drag and adjustment transmission line, wherein, change resistance：It is inductively or capacitively with load in series, that is, increasing or decreasing negative
The impedance value of load, the utility model solve prior art and existed due to impedance mismatching, so as to cause energy loss in transmission
Problem, the effect have and solve energy loss, high input impedance and low output impedance in transmission, realized attenuator, improve nothing
The advantageous effects of the receiving sensitivity of line Transmission system.
Using the technical solution of the utility model, or those skilled in the art is in the inspiration of technical solutions of the utility model
Under, similar technical scheme is designed, and reach above-mentioned technique effect, it is to fall into the scope of protection of the utility model.
Claims (4)
1. a kind of wireless digital power amplification system, it is characterised in that including input matching circuit and output matching circuit and amplification
Circuit, the input amplifier are connected to input matching circuit one end, and its output end is connected to output matching circuit one end；
The input matching circuit includes input build-out resistor R1, input matching capacitance C1, input matching inductance L1；
The output matching circuit includes output matching resistance R2, output matching electric capacity C2, output matching inductance L3；
Described input matching capacitance C1 one end is connected to input build-out resistor R1 one end, and the input build-out resistor R1's is another
End is connected to input matching inductance L1 one end；
Described output matching electric capacity C2 one end is connected to output matching resistance R2 one end, and the output matching resistance R2's is another
End is connected to output matching inductance L2 one end.
2. a kind of wireless digital power amplification system according to claim 1, it is characterised in that the input matching circuit is another
End is connected to radio frequency source, and the output matching circuit other end is connected to load.
3. a kind of wireless digital power amplification system according to claim 2, it is characterised in that the input matching capacitance C1 is another
One end is connected to radio frequency source one end, and the radio frequency source other end is connected to the input matching inductance L1 other end.
4. a kind of wireless digital power amplification system according to claim 3, it is characterised in that the output matching electric capacity C2 is another
One end is connected to load one end, and the load other end is connected to the output matching inductance L2 other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720693021.5U CN206908577U (en) | 2017-06-15 | 2017-06-15 | A kind of wireless digital power amplification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720693021.5U CN206908577U (en) | 2017-06-15 | 2017-06-15 | A kind of wireless digital power amplification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206908577U true CN206908577U (en) | 2018-01-19 |
Family
ID=61284486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720693021.5U Active CN206908577U (en) | 2017-06-15 | 2017-06-15 | A kind of wireless digital power amplification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206908577U (en) |
-
2017
- 2017-06-15 CN CN201720693021.5U patent/CN206908577U/en active Active
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