CN103095111A - Filtering circuit of radio frequency power amplifier (PA) power supply - Google Patents
Filtering circuit of radio frequency power amplifier (PA) power supply Download PDFInfo
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- CN103095111A CN103095111A CN2011103362744A CN201110336274A CN103095111A CN 103095111 A CN103095111 A CN 103095111A CN 2011103362744 A CN2011103362744 A CN 2011103362744A CN 201110336274 A CN201110336274 A CN 201110336274A CN 103095111 A CN103095111 A CN 103095111A
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Abstract
The invention discloses a filtering circuit of a radio frequency power amplifier (PA) power supply. The filtering circuit of the radio frequency PA power supply comprises a large power radio frequency power amplifier power supply BATT, a filtering circuit connected with the large power radio frequency power amplifier power supply BATT, and a power supply output VBAT connected with the filtering circuit. The filtering circuit of the radio frequency PA power supply has the advantages of being capable of improving power supplying quality of the radio frequency PA, improving signal quality of the radio frequency PA, and reducing electromagnetic interference to the radio frequency PA.
Description
Technical field
The present invention relates to filter circuit, specifically refer to the filter circuit of radio frequency PA power supply.
Background technology
Filter circuit is usually used in the ripple in the elimination rectifier output voltage, generally formed by reactance component, as at load resistance two ends shunt capacitor C, or with load series reactor L, and by electric capacity, inductance forms the various compound filter circuit that forms.
Filtering is a key concept during signal is processed.Filtering divides classical filtering and modern filtering.
The concept of classical filter is a concept of engineering according to Fourier analysis and conversion proposition.Theoretical according to higher mathematics, any one satisfies the signal of certain condition, can be regarded as by a unlimited sine-wave superimposed to form.In other words, be exactly Engineering Signal be that the sinusoidal wave linear superposition of different frequency forms, the sine wave that forms the different frequency of signal is called the frequency content of signal or is called harmonic components.Only allow the signal component in the certain frequency scope normally to pass through, and the circuit that stops another part frequency content to be passed through is called classical filter device or filter circuit.
When flowing through the curent change of inductance, the induced electromotive force that produces in inductance coil will stop the variation of electric current.When the electric current by inductance coil increased, self induction electromotive force and current opposite in direction that inductance coil produces stoped the increase of electric current, simultaneously a part of electric energy conversion are become magnetic field energy to be stored among inductance; When the electric current by inductance coil reduced, self induction electromotive force was identical with the sense of current, stoped reducing of electric current, discharged simultaneously the energy of storage, with reducing of offset current.Therefore after inductor filter, not only the pulsation of load current and voltage reduces, and waveform becomes smoothly, and the angle of flow of rectifier diode increases.
In the situation that inductance coil is constant, load resistance is less, and the alternating current component of output voltage is less.Only at RL〉〉 could obtain filter effect preferably during ω L.L is larger, and filter effect better.
Alternating component in the direct voltage that filter circuit reduces to pulse as far as possible keeps its flip-flop, and the output voltage ripple coefficient is reduced, and it is smoother that waveform becomes.
For the electronic equipment of wireless data terminal class, generally need the power filter of high-power RF power amplifier.The filter circuit of its power amplification, due to the volume restrictions of its unlimited data terminal, and the control of production cost, therefore need to seek a kind of electric source filter circuit for being used for the high-power RF power amplifier.It is little that its electric source filter circuit need to satisfy volume, and cost hangs down characteristics.Adapt to the overall structure demand of terminals with this.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, cost is low, can be effectively for the filter circuit of radio frequency PA power supply.
Implementation of the present invention is as follows: the filter circuit of radio frequency PA power supply, the power supply output VBAT that comprises high-power RF power amplifier power supply BATT and be connected in the filter circuit of high-power RF power amplifier power supply BATT and be connected in filter circuit.
The filter circuit of described power supply comprises magnetic bead L11, the capacitor C 109 of series connection successively, described capacitor C 109 earth connections, described capacitor C 109 also is parallel with the capacitor C 70 of ground connection, described capacitor C 70 is parallel with the capacitor C 65 of ground connection, described capacitor C 6 is parallel with the capacitor C 62 of ground connection, described capacitor C 62 is connected with high-power RF power amplifier power supply BATT away from an end of ground connection, and described magnetic bead L11 is connected with power supply output VBAT away from an end of capacitor C 109.
Described capacitor C 109 is the electric capacity of uF level, and its capacitance is: 10uF.
Described capacitor C 70 is the electric capacity of pF level, and its capacitance is: 27pF.
Described capacitor C 65 is the electric capacity of nF level, and its capacitance is: 10nF.
Described capacitor C 62 is the electric capacity of pF level, and its capacitance is: 1pF.
Design principle thought of the present invention is: adopt the capacitor filtering of multistage and earth connection to process.Electric capacity is carried out classification capacitance is set.Make the setting of grading capacitance value by what do not limit from uF level to pF level simultaneously, and the relative position of adjusting the capacitance of different stage, interference that can the corresponding frequency of filtering.Seal in again a magnetic bead L11, can further reduce power supply and disturb.
In this circuit, when entering capacitor C 62, signal is the electric capacity of pF level, its capacitance is: 1pF, can eliminate for other frequency of pf level and disturb, when entering capacitor C 65, signal is the electric capacity of nF level, its capacitance is: 10nF, can eliminate other frequency of nF level and disturb; Be the electric capacity of uF level when signal enters capacitor C 109, its capacitance is: 10uF, can eliminate other frequency of uF level and disturb.
The invention has the advantages that: can improve the power supply quality of radio frequency PA, improve the signal quality of radio frequency PA.Reduce the electromagnetic interference of radio frequency PA.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Embodiment one
As shown in Figure 1.
The filter circuit of radio frequency PA power supply, the power supply output VBAT that comprises high-power RF power amplifier power supply BATT and be connected in the filter circuit of high-power RF power amplifier power supply BATT and be connected in filter circuit.
The filter circuit of described power supply comprises magnetic bead L11, the capacitor C 109 of series connection successively, described capacitor C 109 earth connections, described capacitor C 109 also is parallel with the capacitor C 70 of ground connection, described capacitor C 70 is parallel with the capacitor C 65 of ground connection, described capacitor C 6 is parallel with the capacitor C 62 of ground connection, described capacitor C 62 is connected with high-power RF power amplifier power supply BATT away from an end of ground connection, and described magnetic bead L11 is connected with power supply output VBAT away from an end of capacitor C 109.
Described capacitor C 109 is the electric capacity of uF level, and its capacitance is: 10uF.
Described capacitor C 70 is the electric capacity of pF level, and its capacitance is: 27pF.
Described capacitor C 65 is the electric capacity of nF level, and its capacitance is: 10nF.
Described capacitor C 62 is the electric capacity of pF level, and its capacitance is: 1pF.
In this circuit, when entering capacitor C 62, signal is the electric capacity of pF level, its capacitance is: 1pF, can eliminate for other frequency of pf level and disturb, when entering capacitor C 65, signal is the electric capacity of nF level, its capacitance is: 10nF, can eliminate other frequency of nF level and disturb; Be the electric capacity of uF level when signal enters capacitor C 109, its capacitance is: 10uF, can eliminate other frequency of uF level and disturb.
Process based on other filtering of above-mentioned classification, can improve the power supply quality of radio frequency PA, improve the signal quality of radio frequency PA.Reduce the electromagnetic interference of radio frequency PA.
Only adopting simultaneously electric capacity to carry out filtering processes.Therefore its arranging simply on pcb board, therefore can effectively dwindle filter circuit in the area accounting of pcb board.
As mentioned above, can well realize the present invention.
Claims (6)
1. the filter circuit of radio frequency PA power supply, is characterized in that: the power supply output VBAT that comprises high-power RF power amplifier power supply BATT and be connected in the filter circuit of high-power RF power amplifier power supply BATT and be connected in filter circuit.
2. the filter circuit of radio frequency PA power supply according to claim 1, it is characterized in that: the filter circuit of described power supply comprises magnetic bead L11, the capacitor C 109 of series connection successively, described capacitor C 109 earth connections, described capacitor C 109 also is parallel with the capacitor C 70 of ground connection, described capacitor C 70 is parallel with the capacitor C 65 of ground connection, described capacitor C 6 is parallel with the capacitor C 62 of ground connection, described capacitor C 62 is connected with high-power RF power amplifier power supply BATT away from an end of ground connection, and described magnetic bead L11 is connected with power supply output VBAT away from an end of capacitor C 109.
3. the filter circuit of radio frequency PA power supply according to claim 2, it is characterized in that: described capacitor C 109 is the electric capacity of uF level, and its capacitance is: 10uF.
4. the filter circuit of radio frequency PA power supply according to claim 2, it is characterized in that: described capacitor C 70 is the electric capacity of pF level, and its capacitance is: 27pF.
5. the filter circuit of radio frequency PA power supply according to claim 2, it is characterized in that: described capacitor C 65 is the electric capacity of nF level, and its capacitance is: 10nF.
6. the filter circuit of radio frequency PA power supply according to claim 2, it is characterized in that: described capacitor C 62 is the electric capacity of pF level, and its capacitance is: 1pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103362744A CN103095111A (en) | 2011-10-31 | 2011-10-31 | Filtering circuit of radio frequency power amplifier (PA) power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103362744A CN103095111A (en) | 2011-10-31 | 2011-10-31 | Filtering circuit of radio frequency power amplifier (PA) power supply |
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| Publication Number | Publication Date |
|---|---|
| CN103095111A true CN103095111A (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103362744A Pending CN103095111A (en) | 2011-10-31 | 2011-10-31 | Filtering circuit of radio frequency power amplifier (PA) power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107704408A (en) * | 2017-11-27 | 2018-02-16 | 中山路得斯空调有限公司 | A kind of data acquisition storage converter based on NB IoT interfaces |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6052033A (en) * | 1998-09-30 | 2000-04-18 | Logitech, Inc. | Radio frequency amplifier system and method |
| CN101257316A (en) * | 2007-01-25 | 2008-09-03 | 捷讯研究有限公司 | System and method for controlling radio frequency transmissions in an electronic device |
| CN101689806A (en) * | 2007-05-07 | 2010-03-31 | 诺基亚公司 | Power supplies for RF power amplifier |
| CN202334284U (en) * | 2011-10-31 | 2012-07-11 | 成都高新区尼玛电子产品外观设计工作室 | Filter circuit of radio frequency power amplifier (PA) power source |
-
2011
- 2011-10-31 CN CN2011103362744A patent/CN103095111A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6052033A (en) * | 1998-09-30 | 2000-04-18 | Logitech, Inc. | Radio frequency amplifier system and method |
| CN101257316A (en) * | 2007-01-25 | 2008-09-03 | 捷讯研究有限公司 | System and method for controlling radio frequency transmissions in an electronic device |
| CN101689806A (en) * | 2007-05-07 | 2010-03-31 | 诺基亚公司 | Power supplies for RF power amplifier |
| CN202334284U (en) * | 2011-10-31 | 2012-07-11 | 成都高新区尼玛电子产品外观设计工作室 | Filter circuit of radio frequency power amplifier (PA) power source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107704408A (en) * | 2017-11-27 | 2018-02-16 | 中山路得斯空调有限公司 | A kind of data acquisition storage converter based on NB IoT interfaces |
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Application publication date: 20130508 |