CN209218047U - A kind of multistage linear power amplification power supply circuit of MOSFET control - Google Patents
A kind of multistage linear power amplification power supply circuit of MOSFET control Download PDFInfo
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- CN209218047U CN209218047U CN201822274827.8U CN201822274827U CN209218047U CN 209218047 U CN209218047 U CN 209218047U CN 201822274827 U CN201822274827 U CN 201822274827U CN 209218047 U CN209218047 U CN 209218047U
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- voltage
- mosfet
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- output voltage
- switch mosfet
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Abstract
The utility model belongs to field of switch power, and in particular to a kind of multistage linear power amplification power supply circuit of MOSFET control, comprising: output signal detection circuit, for detecting output voltage；Driving circuit is electrically connected with the output signal detection circuit；Switching circuit, input terminal are connect with the driving circuit, and the output end of the switching circuit is electrically connected with amplifier；Wherein, according to the size of output voltage, the switching circuit is segmented powers to the amplifier.The utility model is controlled using switch mosfet according to the size sectional power supply of signal, power switching, greatly improves the efficiency of power amplifier, reduce fever.
Description
Technical field
The utility model belongs to field of switch power, and in particular to a kind of multistage linear power amplification confession of MOSFET control
Circuit.
Background technique
Using traditional single-voltage-supply cmos for linear power amplifier, in order to export distortionless power signal,
Supply voltage more higher than output signal must be used.Often input signal is variation for this application, thus exports letter
Number be also variation, in order to which when inputting big signal, output signal is undistorted, the supply voltage of amplifier often uses relatively high
Voltage.When input signal is smaller, efficiency is just very low in this way, and power tube fever is serious.
In order to solve this problem, the utility model patent uses a kind of multistage linear power amplification of MOSFET control
Power supply circuit realizes the size according to signal come sectional power supply.
Utility model content
One purpose of the utility model is to solve at least the above problems and/or defect, and provide and at least will be described later
The advantages of.
There are one purposes to be to provide a kind of multistage linear power amplification power supply circuit that MOSFET is controlled for the utility model,
The efficiency of power amplifier is greatly improved, fever is reduced.
There are one purposes to be to provide a kind of multistage linear power amplification power supply circuit that MOSFET is controlled for the utility model,
Conventional linear power amplifier is solved when input signal is smaller, low efficiency and the high big problem of generating heat of power tube loss.
In order to realize these purposes and other advantages according to the present utility model, the utility model provides a kind of MOSFET
The multistage linear power amplification power supply circuit of control, comprising:
Output signal detection circuit, for detecting output voltage；
Driving circuit is electrically connected with the output signal detection circuit；
Switching circuit, input terminal are connect with the driving circuit, and output end and the amplifier of the switching circuit are electrically connected
It connects；
Wherein, according to the size of output voltage, the switching circuit is segmented powers to the amplifier.
Preferably, the switching circuit includes at least one switch unit, and the switch unit includes first voltage mould
Block, second voltage module, the first isolating diode, the second isolating diode and the first switch mosfet, the first voltage mould
Block and the second voltage block coupled in series, the output end of the first voltage module are connect with first isolating diode, institute
The output end for stating second voltage module is connect with the input terminal of second isolating diode, first isolating diode it is defeated
Outlet is connect with the source level of first switch mosfet, the output end of second isolating diode and the first MOSFET
The drain electrode of switch connects, and the grid of first switch mosfet is connect with the driving circuit；
Wherein, according to the size of output voltage, first switch mosfet controls the first voltage module and described
One or two in second voltage module are amplifier power supply.
Preferably, the switching circuit includes at least one switch unit, and the switch unit includes first voltage mould
Block, second voltage module, tertiary voltage module, the first isolating diode, the second isolating diode, the first switch mosfet and
Two switch mosfets, the first voltage module, the second voltage module and the tertiary voltage block coupled in series, described first
The output end of voltage module is connect with first isolating diode, the output end of the second voltage module with described second every
The source level of input terminal connection from diode, the output end of first isolating diode and first switch mosfet connects
It connects, the output end of second isolating diode is connect with the drain electrode of first switch mosfet, and the 2nd MOSFET is opened
The source level of pass is connect with the drain electrode of first switch mosfet, the output end of the tertiary voltage module and described second
The drain electrode of switch mosfet connects, the grid of first switch mosfet and second switch mosfet with the driving
Circuit connection；
Wherein, institute is controlled according to the size of output voltage, first switch mosfet and second switch mosfet
One, two or three stated in first voltage module, the second voltage module and the tertiary voltage module is described
Amplifier power supply.
Preferably, the output voltage includes the first output voltage and the second output voltage, first output voltage
Range 0-VREF1, the range of second output voltage is VREF1-VREF2；
Wherein, when output voltage is the first output voltage, first switch mosfet is closed；Output voltage is second defeated
Out when voltage, the first switch mosfet conducting.
Preferably, the output voltage include the output voltage include the first output voltage, the second output voltage and
Third output voltage, the range 0-VREF1 of first output voltage, the range of second output voltage are VREF1-
VREF2, the range of the third output voltage are greater than VREF2；
Wherein, when output voltage is the first output voltage, first switch mosfet and the second switch are closed；It is defeated
When voltage is the second output voltage out, the first switch mosfet conducting, the second switch is closed；Output voltage is third
When output voltage, first switch mosfet and the second switch are simultaneously turned on.
Preferably, the first voltage module and the second voltage module are battery.
Preferably, the tertiary voltage module is battery.
The utility model is include at least the following beneficial effects:
1, the multistage linear power amplification power supply circuit of a kind of MOSFET control provided by the utility model, according to signal
Size sectional power supply, power switching using switch mosfet control, greatly improve the efficiency of power amplifier, reduce
Fever.
2, the multistage linear power amplification power supply circuit of a kind of MOSFET control provided by the utility model, structure letter
It is single, it is at low cost, there is the market competitiveness, convenient for promoting.
3, the multistage linear power amplification power supply circuit of a kind of MOSFET control provided by the utility model, uses
MOSFET has extremely low internal resistance in conducting, and switching speed is fast.
Detailed description of the invention
Fig. 1 is one embodiment of the multistage linear power amplification power supply circuit of MOSFET control described in the utility model
Circuit fundamental diagram；
Fig. 2 is another implementation of the multistage linear power amplification power supply circuit of MOSFET control described in the utility model
The circuit fundamental diagram of example；
Wherein, BT1 be first voltage module, BT2 be second voltage module, BT3 be tertiary voltage module, D1 be first every
From diode, D2 is the second isolating diode, and Q1 is the first switch mosfet, and Q2 is the second switch mosfet, and LV is low-voltage,
MV is middle voltage, and HV is high voltage, and VREF1 and VREF2 are reference voltage, and R3, R4, R5, R6 are resistance, and Q5, Q8, Q7, Q10 are
Triode.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
In the present specification, when an element is mentioned as " be connected to or be coupled to " another element or " is arranged another
In one element " when, can " direct " be connected to or be coupled to another element or it is " direct " be arranged in another element.Or with
The intervenient mode of other elements is connected to or is coupled to another element or is arranged in another element, unless it is by volume
" be coupled directly to or be connected to " another element or " directly setting " are in another element.Furthermore, it is to be understood that when an element quilt
It, can when referring to as " on another element ", " above another element ", " under another element " or " below another element "
It contacts with another element " direct " or is contacted in a manner of having intervened other elements therebetween with another element, unless it is mentioned as
It is directly contacted with another element.
The supply voltage of three sections of first voltage module BT1 in the utility model is LV, the power supply of second voltage module BT2
Voltage is MV, and the supply voltage of tertiary voltage module BT3 is HV.
The utility model provides a kind of multistage linear power amplification power supply circuit of MOSFET control, comprising:
Output signal detection circuit, for detecting output voltage；
Driving circuit is electrically connected with the output signal detection circuit；
Switching circuit, input terminal are connect with the driving circuit, and output end and the amplifier of the switching circuit are electrically connected
It connects；
Wherein, according to the size of output voltage, the switching circuit is segmented powers to the amplifier.
Above scheme is realized according to varying input signal size, to supply amplifier to select different voltage to be segmented
Electricity greatly improves the efficiency of power amplifier, reduces fever.
On the basis of above situation, another embodiment, the switching circuit includes at least one switch unit, multiple
Switch unit combines composition switching circuit, and the switch unit includes first voltage module BT1, second voltage module
BT2, the first isolating diode D1, the second isolating diode D2 and the first switch mosfet Q1, the first voltage module BT1 with
The second voltage module BT2 series connection, the output end and the first isolating diode D1 of the first voltage module BT1 connect
It connects, the output end of the second voltage module BT1 is connect with the input terminal of the second isolating diode D2, first isolation
The output end of diode D1 is connect with the source level of the first switch mosfet Q1, the output end of the second isolating diode D2
It is connect with the drain electrode of the first switch mosfet Q1, the grid and the driving circuit of the first switch mosfet Q1 connects
It connects；
Wherein, according to the size of output voltage, the first switch mosfet Q1 control the first voltage module BT1 and
One or two in the second voltage module BT2 are amplifier power supply.
The switch unit in above-described embodiment is powered using two sections of voltage switchings to the amplifier.
On the basis of above situation, another embodiment, the switching circuit includes at least one switch unit, described
Switch unit include first voltage module BT1, second voltage module BT2, tertiary voltage module BT3, the first isolating diode D1,
It is second isolating diode D2, the first switch mosfet Q1 and the second switch mosfet Q2, the first voltage module BT1, described
Second voltage module BT2 connects with the tertiary voltage module BT3, the output end of the first voltage module BT1 and described the
One isolating diode D1 connection, the input terminal of the output end of the second voltage module BT2 and the second isolating diode D2
Connection, the output end of the first isolating diode D1 connect with the source level of the first switch mosfet Q1, described second every
Output end from diode D2 is connect with the drain electrode of the first switch mosfet Q1, the source level of the second switch mosfet Q2
It is connect with the drain electrode of the first switch mosfet Q1, the output end and the 2nd MOSFET of the tertiary voltage module BT3
The drain electrode of switch Q2 connects, the grid of the first switch mosfet Q1 and the second switch mosfet Q2 with the driving
Circuit connection；
Wherein, according to the size of output voltage, the first switch mosfet Q1 and the second switch mosfet Q2 control
Make one, two in the first voltage module BT1, the second voltage module BT2 and the tertiary voltage module BT3 or
Person three are powered for the amplifier.
The switch unit in above-described embodiment is powered using three sections of voltage switchings to the amplifier.
On the basis of above situation, another embodiment, the output voltage includes that the first output voltage and second are defeated
Voltage out, the range 0-VREF1 of first output voltage, the range of second output voltage are VREF1-VREF2,
In, VREF2 is greater than VREF1, i.e., described second output voltage is greater than first output voltage.
Wherein, when output voltage is the first output voltage, that is, when needing low-voltage, first switch mosfet is not
Conducting, the first voltage module BT1 are powered by the first isolating diode D1 to the amplifier, supply voltage VO
=LV, as shown in Figure 1；Output voltage be the second output voltage when, i.e., medium voltate value when, first switch mosfet
Q1 conducting, the second voltage module BT2 and the first voltage module BT1 be connected in series through the second isolating diode D2 to
The amplifier power supply, supply voltage VO=MV, as shown in Figure 1, the first isolating diode D1 is ended due to reverse-biased.
On the basis of above situation, another embodiment, the output voltage includes that the output voltage includes first
Output voltage, the second output voltage and third output voltage, the range 0-VREF1 of first output voltage, described second is defeated
The range of voltage is VREF1-VREF2 out, and the range of the third output voltage is greater than VREF2；The third output voltage is big
In second output voltage and first output voltage；
Wherein, output voltage be the first output voltage when, that is, when needing low-voltage output, first switch mosfet and
The second switch is not turned on, and amplifier power supply is given by the first voltage module BT1 by the first isolating diode D1
The amplifier power supply, supply voltage VO=LV, as shown in Figure 2；When output voltage is the second output voltage, that is, need medium
When voltage output, first switch mosfet conducting, the second switch is closed, the second voltage module BT2 and described
First voltage module BT1 is connected in series through the second isolating diode D2 and powers to the amplifier, supply voltage VO=MV,
As shown in Fig. 2, the first isolating diode D1 is ended due to reverse-biased；When output voltage is third output voltage, that is, need
When high voltage exports, first switch mosfet and the second switch are simultaneously turned on, and amplifier is powered by first voltage mould
Block BT1, second voltage module BT2, tertiary voltage module BT3 are connected in series through the first isolating diode Q1, the second isolating diode
Q2 powers to amplifier, and supply voltage VO=HV, as shown in Figure 2, D1, D2 are ended due to reverse-biased.
Wherein, VREF1 and VREF2 indicates reference voltage, and the sizes values range of output voltage can be according to practical amplifier
Needs, carry out the setting of occurrence.
On the basis of above situation, another embodiment, the first voltage module, the second voltage module and institute
Stating tertiary voltage module is battery or other power supplys.
On the basis of above situation, another embodiment, when the switch unit uses two sections of power supplies, the driving
Circuit (as shown in Figure 1) includes two triodes Q5 and Q8, and two triodes are together in parallel and two resistance R3 and R4 contact
Come, wherein the output end of resistance R4 is connect with the grid of first switch mosfet, the input terminal of resistance R3 and the output
Signal deteching circuit connection；
When the switch unit use three sections of power supplies when, the driving circuit it is (as shown in Figure 2) including four triode Q5,
Q8, Q7 and Q10, two triodes Q5 and Q8 are together in parallel and two resistance R3 and R4 are concatenated, the wherein output of resistance R4
End is connect with the grid of first switch mosfet, and the input terminal of resistance R3 is connect with the output signal detection circuit, and two
A triode Q7 and Q10 is together in parallel and resistance R5 and R6 are together in series, and wherein the output end of R6 is opened with the 2nd MOSFET
The grid of pass connects, and the input terminal of resistance R5 is connect with the output signal detection circuit.
The signal that the driving circuit transmits controls the requirement of target according to it, is converted to and is added in power electronic devices control
It holds between common end, the signal that can be turned it on or turn off.Half control type device need to only be provided and open control signal, to complete
Control type device, which should then provide, opens control signal, provides shutdown control signal, again to guarantee that device is reliably connected as required
Or shutdown.Which raises system reliability and conversion efficiency is improved, reduces switching device stress.
Output signal detection circuit is used to detect the size of the voltage of output signal, connects with driving circuit, wherein
VREF1 and VREF1 represent reference voltage.
Switch mosfet used in the utility model is that one kind can be widely used in analog circuit and digital circuit
Field-effect transistor, major advantage: thermal stability is good, safety operation area is big, in conducting with extremely low internal resistance, switching speed
Fastly, the efficiency of power amplifier is improved.
The utility model is powered applied to linear prower amplifier, comprising being not limited to audio-frequency power amplifier, radio-frequency power
Amplifier, linear power supply etc..
It is readily apparent that those skilled in the art can be from the various structures of embodiment according to the present utility model
It is middle to obtain the various effects not yet referred directly to according to unpainful each embodiment.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization.It can be applied to various fields suitable for the present invention completely.For those skilled in the art,
Other modifications may be easily implemented.Therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (7)
1. a kind of multistage linear power amplification power supply circuit of MOSFET control characterized by comprising
Output signal detection circuit, for detecting output voltage；
Driving circuit is electrically connected with the output signal detection circuit；
Switching circuit, input terminal are connect with the driving circuit, and the output end of the switching circuit is electrically connected with amplifier；
Wherein, according to the size of output voltage, the switching circuit is segmented powers to the amplifier.
2. the multistage linear power amplification power supply circuit of MOSFET control as described in claim 1, which is characterized in that described to open
Powered-down road includes at least one switch unit, and the switch unit includes first voltage module, second voltage module, the first isolation
Diode, the second isolating diode and the first switch mosfet, the first voltage module and the second voltage block coupled in series,
The output end of the first voltage module is connect with first isolating diode, the output end of the second voltage module and institute
State the input terminal connection of the second isolating diode, the output end of first isolating diode and first switch mosfet
Source level connection, the output end of second isolating diode are connect with the drain electrode of first switch mosfet, and described first
The grid of switch mosfet is connect with the driving circuit；
Wherein, according to the size of output voltage, first switch mosfet controls the first voltage module and described second
One or two in voltage module are amplifier power supply.
3. the multistage linear power amplification power supply circuit of MOSFET control as claimed in claim 2, which is characterized in that described to open
Powered-down road includes at least one switch unit, and the switch unit includes first voltage module, second voltage module, tertiary voltage
Module, the first isolating diode, the second isolating diode, the first switch mosfet and the second switch mosfet, first electricity
Die block, the second voltage module and the tertiary voltage block coupled in series, the output end of the first voltage module with it is described
The connection of first isolating diode, the output end of the second voltage module are connect with the input terminal of second isolating diode,
The output end of first isolating diode is connect with the source level of first switch mosfet, second isolating diode
Output end is connect with the drain electrode of first switch mosfet, the source level of second switch mosfet and the first MOSFET
The drain electrode of switch connects, and the output end of the tertiary voltage module is connect with the drain electrode of second switch mosfet, and described the
The grid of one switch mosfet and second switch mosfet is connect with the driving circuit；
Wherein, according to the size of output voltage, first switch mosfet and second switch mosfet control described the
One, two or three in one voltage module, the second voltage module and the tertiary voltage module is the amplification
Device power supply.
4. the multistage linear power amplification power supply circuit of MOSFET control as claimed in claim 2, which is characterized in that described defeated
Voltage includes the first output voltage and the second output voltage out, and the range 0-VREF1 of first output voltage, described second is defeated
The range of voltage is VREF1-VREF2 out；
Wherein, when output voltage is the first output voltage, first switch mosfet is closed；Output voltage is the second output electricity
When pressure, the first switch mosfet conducting.
5. the multistage linear power amplification power supply circuit of MOSFET control as claimed in claim 3, which is characterized in that described defeated
It includes the first output voltage, the second output voltage and third output voltage that voltage, which includes the output voltage, out, and described first is defeated
The range of the range 0-VREF1 of voltage out, second output voltage are VREF1-VREF2, and the third output voltage is greater than
VREF2；
Wherein, when output voltage is the first output voltage, first switch mosfet and second switch mosfet are closed；
When output voltage is the second output voltage, the first switch mosfet conducting, second switch mosfet is closed；Output electricity
When pressure is third output voltage, first switch mosfet and second switch mosfet are simultaneously turned on.
6. the multistage linear power amplification power supply circuit of MOSFET as claimed in claim 2 control, which is characterized in that described the
One voltage module and the second voltage module are battery.
7. the multistage linear power amplification power supply circuit of MOSFET as claimed in claim 3 control, which is characterized in that described the
Three voltage modules are battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274827.8U CN209218047U (en) | 2018-12-29 | 2018-12-29 | A kind of multistage linear power amplification power supply circuit of MOSFET control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274827.8U CN209218047U (en) | 2018-12-29 | 2018-12-29 | A kind of multistage linear power amplification power supply circuit of MOSFET control |
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| Publication Number | Publication Date |
|---|---|
| CN209218047U true CN209218047U (en) | 2019-08-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525204A (en) * | 2018-12-29 | 2019-03-26 | 华羿微电子股份有限公司 | A kind of multistage linear power amplification power supply circuit of MOSFET control |
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2018
- 2018-12-29 CN CN201822274827.8U patent/CN209218047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525204A (en) * | 2018-12-29 | 2019-03-26 | 华羿微电子股份有限公司 | A kind of multistage linear power amplification power supply circuit of MOSFET control |
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