CN209897014U - Power amplifier power supply circuit and terminal - Google Patents
Power amplifier power supply circuit and terminal Download PDFInfo
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- CN209897014U CN209897014U CN201920813593.1U CN201920813593U CN209897014U CN 209897014 U CN209897014 U CN 209897014U CN 201920813593 U CN201920813593 U CN 201920813593U CN 209897014 U CN209897014 U CN 209897014U
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- power amplifier
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Abstract
The utility model provides a power amplifier supply circuit and terminal. This power amplifier supply circuit includes: a first voltage adjustment module supporting an envelope tracking function; a second voltage adjustment module supporting an average power tracking function; the switching power supply module is respectively connected with the first voltage adjusting module and the second voltage adjusting module; a switch; peripheral circuits, and power amplifiers; the first end of the switch is respectively connected with the first voltage adjusting module and one end of the peripheral circuit, and the second end of the switch is grounded; the other end of the peripheral circuit is respectively connected with the second voltage adjusting module and the power amplifier; when the switch is in an off state, the peripheral circuit is connected in series with the first voltage adjusting module; when the switch is in a closed state, the peripheral circuit is connected in parallel with the power amplifier. The utility model discloses can realize the multiplexing to peripheral circuit for power amplifier supply circuit had both satisfied the requirement of APT technique to peripheral circuit, satisfied the requirement of ET technique to peripheral circuit again, and low in production cost.
Description
Technical Field
The utility model relates to a communication application technical field especially relates to a power amplifier supply circuit and terminal.
Background
In wireless communication devices such as mobile phones, Power Amplifier (PA) Power consumption accounts for a relatively large proportion of the total Power consumption. In order to reduce Power consumption of a radio frequency Power amplifier, in terms of a Power supply chip, an Average Power Tracking (APT) technology and an Envelope Tracking (ET) technology are mainly used in the current mainstream schemes.
In order to meet the requirements of a power supply circuit adopting an APT technology on a peripheral circuit, a capacitor is often required to be connected in parallel at the output end of the power supply circuit to improve the stability of output voltage; in order to meet the requirement of the power supply circuit adopting the ET technology on the peripheral circuit, a capacitor is often required to be connected in series at the output end of the power supply circuit so as to ensure that the high voltage can be quickly changed along with the envelope.
In the prior art, a power supply circuit for supplying power to a radio frequency power amplifier not only meets the requirements of an APT technology on a peripheral circuit, but also meets the requirements of an ET technology on the peripheral circuit, and in the circuit design, capacitors need to be connected in parallel, capacitors need to be connected in series, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a supply and put supply circuit and terminal to can solve among the prior art radio frequency power amplifier supply circuit and satisfying not only the requirement of APT technique to peripheral circuit, satisfy the condition of ET technique to peripheral circuit's requirement again under, problem that manufacturing cost is high.
In order to solve the technical problem, the embodiment of the utility model provides an adopt following technical scheme:
a power amplifier power supply circuit is used for a terminal and comprises:
a first voltage adjustment module supporting an envelope tracking function;
a second voltage adjustment module supporting an average power tracking function;
the switching power supply module is respectively connected with the first voltage adjusting module and the second voltage adjusting module;
a switch;
peripheral circuits, and
a power amplifier;
the first end of the switch is respectively connected with the first voltage adjusting module and one end of the peripheral circuit, and the second end of the switch is grounded;
the other end of the peripheral circuit is respectively connected with the second voltage adjusting module and the power amplifier;
when the switch is in an off state, the peripheral circuit is connected in series with the first voltage adjusting module;
when the switch is in a closed state, the peripheral circuit is connected in parallel with the power amplifier.
Wherein the peripheral circuit comprises: a capacitor;
the first end of the capacitor is connected to the first voltage adjusting module and the first end of the switch, and the second end of the capacitor is connected to the second voltage adjusting module and the power amplifier.
Wherein, still include: a processor;
the processor is respectively connected with the switching power supply module, the first voltage adjusting module, the second voltage adjusting module, the switch and the output end of the power amplifier.
Wherein, still include: an inductance;
the first end of the inductor is connected with the second voltage adjusting module, and the second end of the inductor is respectively connected with the peripheral circuit and the power amplifier.
Wherein the first voltage adjustment module comprises:
presetting an envelope processing unit;
an actual envelope processing unit;
a first comparator connected to the preset envelope processing unit and the actual envelope processing unit; and the number of the first and second groups,
the first field effect transistor is connected with the switching power supply module;
the first comparator and the first field effect transistor are connected with the processor.
Wherein the second voltage adjustment module comprises:
the second field effect transistor is connected with the switching power supply module;
a digital-to-analog converter coupled to the processor; and the number of the first and second groups,
the second comparator is respectively connected with the switching power supply module and the digital-to-analog converter;
the second comparator and the second field effect transistor are both connected with the processor.
Wherein, the switching power supply module includes:
the booster circuit is connected with the first voltage adjusting module; and the number of the first and second groups,
and the voltage reduction circuit is connected with the second voltage regulation module.
The utility model also provides a terminal, include: the power amplifier power supply circuit according to the above embodiment.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
in the above scheme of the present invention, the envelope tracking function is supported by the first voltage adjustment module; a second voltage adjustment module supporting an average power tracking function; the switching power supply module is respectively connected with the first voltage adjusting module and the second voltage adjusting module; a switch; a peripheral circuit; and, a power amplifier; the first end of the switch is respectively connected with the first voltage adjusting module and one end of the peripheral circuit, and the second end of the switch is grounded; the other end of the peripheral circuit is respectively connected with the second voltage adjusting module and the power amplifier; when the switch is in an off state, the peripheral circuit is connected in series with the first voltage adjusting module; when the switch is in a closed state, the peripheral circuit is connected with the power amplifier in parallel, so that the multiplexing of the peripheral circuit can be realized through the unique arrangement of the switch, the power amplifier power supply circuit not only meets the requirements of the APT technology on the peripheral circuit, but also meets the requirements of the ET technology on the peripheral circuit, and the production cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a power amplifier power supply circuit according to an embodiment of the present invention;
fig. 2 is a schematic view of a current flow direction when a switch in the power amplifier power supply circuit according to the embodiment of the present invention is turned off;
fig. 3 is a schematic diagram of a current flow direction during switching on and off in the power amplifier power supply circuit according to the embodiment of the present invention.
Description of reference numerals:
1-a first voltage adjustment module; 2-a second voltage adjustment module; 3-a switching power supply module; 4-a switch; 5-peripheral circuitry; 51-capacitance; 6-a power amplifier; 7-inductance.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model discloses a supply and put supply circuit is applied to the terminal, as shown in FIG. 1, this power amplifier supply circuit includes: a first voltage adjustment module 1 supporting an envelope tracking function; a second voltage adjusting module 2 supporting an average power tracking function; the switching power supply module 3 is respectively connected with the first voltage adjusting module 1 and the second voltage adjusting module 2; a switch 4; a peripheral circuit 5, and a power amplifier 6; wherein, the first end of the switch 4 is connected to the first voltage adjusting module 1 and one end of the peripheral circuit 5, respectively, and the second end of the switch 4 is grounded; the other end of the peripheral circuit 5 is respectively connected with the second voltage adjusting module 2 and the power amplifier 6; when the switch 4 is in an off state, the peripheral circuit 5 is connected in series with the first voltage adjusting module 1; when the switch 4 is in the closed state, the peripheral circuit 5 is connected in parallel with the power amplifier 6.
It should be noted that the input terminal of the switching power supply module 3 is connected to a power supply.
Also, the output of the power amplifier 6 is connected to radio frequency front end devices, such as an antenna.
Here, in the case where the power of the output terminal of the power amplifier 6 is greater than the first threshold value, the switch 4 is in the off state; in case the power at the output of the power amplifier 6 is smaller than the second threshold value, the switch 4 is in a closed state.
It should be noted that the power at the output terminal of the power amplifier 6 is greater than the first threshold, which indicates that the power amplifier needs to be powered by high power, so that the power amplifier 6 needs to be powered by the first voltage adjustment module 1 supporting the envelope tracking ET function.
The power of the output end of the power amplifier 6 is smaller than the second threshold, which indicates that the power amplifier needs to be powered by low power, so the power amplifier 6 needs to be powered by the second voltage adjusting module 2 supporting the average power tracking APT function.
Preferably, the peripheral circuit 5 includes: a capacitor 51; a first end of the capacitor 51 is connected to the first voltage adjustment module 1 and a first end of the switch 4, respectively, and a second end of the capacitor 51 is connected to the second voltage adjustment module 2 and the power amplifier 6, respectively.
Specifically, when the switch 4 is in an off state, the capacitor 51 is connected in series with the first voltage adjustment module 1; when the switch 4 is in the closed state, the capacitor 51 is connected in parallel with the power amplifier 6.
It should be noted that, when the switch 4 is in the off state, the capacitor 51 is connected in series with the first voltage adjustment module 1, and such a circuit design satisfies the requirement of the first voltage adjustment module 1 supporting the ET function for the peripheral circuit, that is, the purpose of isolating the dc signal and coupling the ac envelope signal can be achieved.
When the switch 4 is in a closed state, the capacitor 51 is connected in parallel with the second voltage regulation module 2, and the circuit design meets the requirement of the second voltage regulation module 2 supporting the APT function on a peripheral circuit, namely, the stability of the output voltage is maintained.
Preferably, the power amplifier power supply circuit further includes: and a processor (not shown), wherein the processor is respectively connected to the output ends of the switching power supply module 3, the first voltage adjusting module 1, the second voltage adjusting module 2, the switch 4 and the power amplifier 6.
When the processor detects that the power at the output terminal of the power amplifier 6 is greater than the first threshold, the control switch 4 is turned off, and the current output from the power supply flows to the input terminal of the power amplifier 6 through the switching power supply module 3, the first voltage adjustment module 1, and the capacitor 51, and the flow of the current is shown by a thick black arrow in fig. 2.
When the processor detects that the power at the output end of the power amplifier 6 is smaller than the second threshold, the control switch 4 is closed, and the current output from the power supply flows to the input end of the power amplifier 6 through the switching power supply module 3 and the second voltage adjusting module 2, and the flow of the current is shown by a thick black arrow in fig. 3.
Preferably, the power amplifier power supply circuit further includes: and a first end of the inductor 7 is connected with the second voltage adjusting module 2, and a second end of the inductor 7 is respectively connected with the peripheral circuit 5 and the power amplifier 6.
Specifically, when the peripheral circuit 5 includes the capacitor 51, the second terminal of the inductor 7 is connected to the capacitor 51 and the power amplifier 6, respectively.
Preferably, the first voltage adjustment module 1 includes: presetting an envelope processing unit; an actual envelope processing unit; the first comparator is connected with the preset envelope processing unit and the actual envelope processing unit; and a first field effect transistor connected to the switching power supply module 3; the first comparator and the first field effect transistor are both connected with the processor.
Here, the first voltage adjustment module 1 synchronously adjusts the supply voltage of the power amplifier according to the envelope of the transmission signal.
Specifically, the preset envelope processing unit includes: a digital-to-analog converter DAC and a decoder. And outputting a preset envelope voltage by subjecting the transmission signal to envelope processing by a preset envelope processing unit.
The actual envelope processing unit includes: an I/V conversion module, a low-pass filter and a linear amplifier. The actual output voltage is output by subjecting the transmission signal to envelope processing by an actual envelope processing unit.
The preset envelope voltage and the actual output voltage are compared through the first comparator, and the processor adjusts the period and the frequency of the first field effect transistor under the condition that the preset envelope voltage is not equal to the actual output voltage, so that the purpose of controlling the output voltage is achieved, and the preset envelope voltage is equal to the actual output voltage.
Preferably, the second voltage adjustment module 2 includes: the second field effect transistor is connected with the switching power supply module 3; a digital-to-analog converter connected to the processor; and a second comparator connected to the switching power supply module 3 and the digital-to-analog converter, respectively; the second comparator and the second field effect transistor are both connected with the processor.
Here, the second voltage adjustment module 2 dynamically adjusts the supply voltage of the power amplifier according to the average power of the transmission signal.
Specifically, the processor gives a preset voltage value according to the transmitting power of the transmitting signal, the preset voltage value is processed by the digital-analog converter and compared with an actual output voltage value output by the second field effect transistor in the second comparator, and the processor adjusts the period and the frequency of the second field effect transistor under the condition that the preset voltage value is not equal to the actual output voltage value, so that the purpose of controlling the output voltage is achieved, and the preset voltage value is equal to the actual output voltage value.
Preferably, the switching power supply module 3 includes: the booster circuit is connected with the first voltage adjusting module 1; and a voltage reduction circuit connected to the second voltage adjustment module 2.
It should be noted that, when the processor detects that the power at the output terminal of the power amplifier 6 is greater than the first threshold, the booster circuit is controlled to be turned on.
And when the processor detects that the power of the output end of the power amplifier 6 is smaller than the second threshold value, controlling the voltage reduction circuit to be conducted.
The utility model provides a power amplifier power supply circuit, which is characterized in that the power amplifier power supply circuit is provided with a first voltage adjusting module supporting an envelope tracking function; a second voltage adjustment module supporting an average power tracking function; the switching power supply module is respectively connected with the first voltage adjusting module and the second voltage adjusting module; a switch; a peripheral circuit; and, a power amplifier; the first end of the switch is respectively connected with the first voltage adjusting module and one end of the peripheral circuit, and the second end of the switch is grounded; the other end of the peripheral circuit is respectively connected with the second voltage adjusting module and the power amplifier; when the switch is in an off state, the peripheral circuit is connected in series with the first voltage adjusting module; when the switch is in a closed state, the peripheral circuit is connected with the power amplifier in parallel, so that the multiplexing of the peripheral circuit can be realized through the unique arrangement of the switch, the power amplifier power supply circuit not only meets the requirements of the APT technology on the peripheral circuit, but also meets the requirements of the ET technology on the peripheral circuit, and the production cost is low.
The utility model also provides a terminal, include: the power amplifier power supply circuit in the above embodiment.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A power amplifier power supply circuit is used for a terminal and is characterized by comprising:
a first voltage adjustment module supporting an envelope tracking function;
a second voltage adjustment module supporting an average power tracking function;
the switching power supply module is respectively connected with the first voltage adjusting module and the second voltage adjusting module;
a switch;
peripheral circuitry, and, in addition,
a power amplifier;
the first end of the switch is respectively connected with the first voltage adjusting module and one end of the peripheral circuit, and the second end of the switch is grounded;
the other end of the peripheral circuit is respectively connected with the second voltage adjusting module and the power amplifier;
when the switch is in an off state, the peripheral circuit is connected in series with the first voltage adjusting module;
when the switch is in a closed state, the peripheral circuit is connected in parallel with the power amplifier.
2. The power amplifier supply circuit of claim 1, wherein the peripheral circuit comprises: a capacitor;
the first end of the capacitor is connected to the first voltage adjusting module and the first end of the switch, and the second end of the capacitor is connected to the second voltage adjusting module and the power amplifier.
3. The power amplifier supply circuit of claim 1, further comprising: a processor;
the processor is respectively connected with the switching power supply module, the first voltage adjusting module, the second voltage adjusting module, the switch and the output end of the power amplifier.
4. The power amplifier supply circuit of claim 1, further comprising: an inductance;
the first end of the inductor is connected with the second voltage adjusting module, and the second end of the inductor is respectively connected with the peripheral circuit and the power amplifier.
5. The power amplifier supply circuit of claim 3, wherein the first voltage adjustment module comprises:
presetting an envelope processing unit;
an actual envelope processing unit;
a first comparator connected to the preset envelope processing unit and the actual envelope processing unit; and the number of the first and second groups,
the first field effect transistor is connected with the switching power supply module;
the first comparator and the first field effect transistor are connected with the processor.
6. The power amplifier and supply circuit of claim 3, wherein the second voltage adjustment module comprises:
the second field effect transistor is connected with the switching power supply module;
a digital-to-analog converter coupled to the processor; and the number of the first and second groups,
the second comparator is respectively connected with the switching power supply module and the digital-to-analog converter;
the second comparator and the second field effect transistor are both connected with the processor.
7. The power amplifier and supply circuit of claim 1, wherein the switching power supply module comprises:
the booster circuit is connected with the first voltage adjusting module; and the number of the first and second groups,
and the voltage reduction circuit is connected with the second voltage regulation module.
8. A terminal, comprising: a power amplifier supply circuit as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920813593.1U CN209897014U (en) | 2019-05-31 | 2019-05-31 | Power amplifier power supply circuit and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920813593.1U CN209897014U (en) | 2019-05-31 | 2019-05-31 | Power amplifier power supply circuit and terminal |
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| Publication Number | Publication Date |
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| CN209897014U true CN209897014U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920813593.1U Active CN209897014U (en) | 2019-05-31 | 2019-05-31 | Power amplifier power supply circuit and terminal |
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| CN (1) | CN209897014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436861A (en) * | 2020-11-24 | 2021-03-02 | 维沃移动通信有限公司 | Radio frequency circuit, electronic device and control method |
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2019
- 2019-05-31 CN CN201920813593.1U patent/CN209897014U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436861A (en) * | 2020-11-24 | 2021-03-02 | 维沃移动通信有限公司 | Radio frequency circuit, electronic device and control method |
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