CN209842623U - PBTL-based output end circuit structure - Google Patents
PBTL-based output end circuit structure Download PDFInfo
- Publication number
- CN209842623U CN209842623U CN201920698638.5U CN201920698638U CN209842623U CN 209842623 U CN209842623 U CN 209842623U CN 201920698638 U CN201920698638 U CN 201920698638U CN 209842623 U CN209842623 U CN 209842623U
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- China
- Prior art keywords
- circuit
- pbtl
- extension line
- pcb board
- connecting wire
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- 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.)
- Expired - Fee Related
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- 238000005452 bending Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses an output circuit structure based on PBTL, including PBTL module, PCB board and circuit element, circuit element pass through the output of connecting wire PBTL on the PCB board and connect, the PCB board on the connecting wire be the circuit extension line, the circuit extension line be greater than the connecting wire of the minimum design line length between two PBTL modules and the circuit element for length. The circuit extension line replaces a part of originally needed inductors on a PCB class, so that the number of the inductors used is reduced, the overall cost is reduced, the distortion condition of the circuit is improved, and the practical effect is better.
Description
Technical Field
The utility model relates to a design PCB circuit design field, in particular to output circuit structure based on PBTL.
Background
In the existing circuit arranged in the form of PBTL (PBTL is formed by connecting two groups of BTLs in parallel, and BTL is an abbreviation of BTL power amplifier), because the PBTL is arranged in a manner of providing high power and high current, in the prior art, each output end must be connected with a high-power filter inductor, so as to ensure the normal operation of the power amplifier IC under the high current, and prevent the internal MOS transistor from being damaged when the output ends of the IC are not synchronously turned on and off.
However, in practical engineering tests, it is found that excessive inductance firstly makes the emi (electromagnetic interference) of the whole environment more complicated, which is not favorable for the design of the whole circuit structure, and also affects some devices which require particularly accurate results.
In addition, the design cost of the circuit is not affected slightly by excessively adding inductors (usually more than 4 inductors are needed to be added), and particularly, the price of the filter inductor with high power is higher than that of a common component.
In addition, the excessive electric components increase the heat generation amount of the entire device, increase the power consumption of the entire device, and further complicate the design of the PCB.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is how to solve and all connect high-power filter inductance's problem at each output at the circuit that adopts the PBTL form.
In order to solve the problem, the utility model provides an output circuit structure based on PBTL, including PBTL module, PCB board and circuit element, circuit element pass through the output of the connecting wire PBTL on the PCB board and connect, the PCB board on the connecting wire be the circuit extension line, the circuit extension line be greater than the connecting wire of the minimum design line length between two PBTL modules and the circuit element for length. The connection line on the PBTL output end is extended, the whole PBTL output end is changed into a circuit extension line, the linear inductance property of the wiring is utilized to be used as a part of series inductance of the power amplifier IC output end, the inductance of the part is utilized to be used as the buffer inductance of the power amplifier IC output end, and the problem that the IC is burnt out due to the fact that the output pipe inside the IC is not synchronously switched on/off is solved.
Preferably, the circuit extension line is of a bending structure and is alternately bent and arranged on the PCB. The requirement on inductance parameters is low, a circuit extension line can be directly arranged between two ends needing to be connected in a roundabout mode, the whole circuit extension line is of a bent structure, and the length required by the circuit extension line is achieved directly through a plurality of bending roundabout designs.
Preferably, the circuit extension line is of an arc-like bending structure and is bent and arranged on the PCB along an arc-like line. For some circuits with larger inductance parameters, the circuit can be designed in a direction of winding outwards and surrounding an action track similar to an arc, and a bent winding shape is added on the arc-like track, so that the length of the extension line of the circuit meets the design requirement.
The method has the following beneficial effects:
the circuit cost is reduced. The overall circuit cost is reduced because the use of the relatively expensive high-power filter inductor is reduced.
Reducing the EMI impact of the device. Because the use of circuit components, i.e., sources of electromagnetic interference, is reduced, the EMI impact within the device is made smaller.
Ensuring that the IC is not burned out. Utilize the technical scheme of the utility model, still can guarantee that IC is not burnt out, guarantee the needs of using.
The distortion condition of the circuit is improved. Because more inductance is removed, the harmonic generation is less, and the overall effect is less.
And the power amplification efficiency is improved. When the equipment works, part of energy is consumed by heat generated by the power inductor, and after the circuit elements are cancelled, the consumption is reduced, and the power amplification power is improved.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the output terminal circuit structure based on PBTL of the present invention.
Fig. 2 is a schematic diagram of actual wiring on a PCB board according to embodiment 1 of the PBTL-based output-side circuit structure.
Description of the drawings: 1 is an extension line inductor, and 2 is a power amplifier output filter inductor
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to better understand the advantages and features of the present invention, and to define the scope of the present invention more clearly.
Example 1
In this embodiment, the schematic circuit diagram is shown in fig. 1, the chip adopts PBTL with 4 output terminals, and adopts a circuit extension line, which is equivalent to an inductor, and therefore, the schematic circuit diagram is labeled with L1 ~ L4.
Because the inductance value of the circuit extension line inductor 1 is not enough to meet the requirement of integral output protection, 2 power amplifier output filter inductors 2 are additionally added, and are marked with L11 ~ L12 in the figure, the arrangement mode is arranged at the other end of the circuit extension line, and the two circuit extension lines are connected with 1 high-power inductor and can be connected with other circuit elements after being connected.
In the concrete actual PCB board design process, in this embodiment, as shown in FIG. 2, the distance of two connection points is far away, and the required length of the circuit extension line is short, and the structure of the circuit extension line adopts a bending structure, and the circuit extension line is alternately bent and arranged on the PCB board, specifically, between the two connection points, the circuit extension line is continuously arranged left and right in a circuitous manner.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (3)
1. The utility model provides an output circuit structure based on PBTL, includes PBTL module, PCB board and circuit component, circuit component pass through the output connection of the connecting wire PBTL on the PCB board, characterized in that, the connecting wire on the PCB board be the circuit extension line, the circuit extension line be the connecting wire that length is greater than the minimum design line length between two PBTL modules and the circuit component.
2. The PBTL-based output terminal circuit structure of claim 1 wherein the circuit extension line is a bent structure, and the alternate bending is arranged on the PCB.
3. The PBTL-based output terminal circuit structure of claim 1 wherein the circuit extension line is an arc-like bent structure and is bent along an arc-like line and arranged on a PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920698638.5U CN209842623U (en) | 2019-05-16 | 2019-05-16 | PBTL-based output end circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920698638.5U CN209842623U (en) | 2019-05-16 | 2019-05-16 | PBTL-based output end circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209842623U true CN209842623U (en) | 2019-12-24 |
Family
ID=68897149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920698638.5U Expired - Fee Related CN209842623U (en) | 2019-05-16 | 2019-05-16 | PBTL-based output end circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209842623U (en) |
-
2019
- 2019-05-16 CN CN201920698638.5U patent/CN209842623U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 |