CN101902204B - Power supply method, power source device and base station radio frequency system for power amplification - Google Patents
Power supply method, power source device and base station radio frequency system for power amplification Download PDFInfo
- Publication number
- CN101902204B CN101902204B CN200910142159A CN200910142159A CN101902204B CN 101902204 B CN101902204 B CN 101902204B CN 200910142159 A CN200910142159 A CN 200910142159A CN 200910142159 A CN200910142159 A CN 200910142159A CN 101902204 B CN101902204 B CN 101902204B
- Authority
- CN
- China
- Prior art keywords
- current
- electric current
- signal
- load
- switchgear
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention provides a power supply method, a power supply device and a power supply system for power amplification. The power supply method comprises that: control equipment controls the switching on or off of N pieces of first switch equipment according to the received current given signal, so that current sources of N branches output the current which corresponds to the current given signal; when the first switch equipment is switched off, a current source on a corresponding branch outputs current to the second switch equipment; when the first switch equipment is switched on, the current source on the corresponding branch is in grounded short circuit; the second switch equipment is used for unidirectionally transmitting the current, transmitting the current output by the current source to the load, and preventing the current from flowing from the load to the first switch equipment; and a linear amplification unit amplifies the received voltage signal to be amplified so as to present a linear relationship between the amplified voltage signal and the voltage signal to be amplified, and regulates the voltage of the load to that of the amplified voltage signal. Therefore, the current passing through the switch equipment is reduced, and the speed of the switch equipment is improved. Due to the no-floating ground characteristic, the switch equipment is easy to control.
Description
Technical field
The present invention relates to power supply and power amplification field, particularly relate to a kind of method of supplying power to, supply unit and base station radio frequency system that is used for power amplification.
Background technology
Power amplifier divides two types of linear power amplifier and non-linear power amplifiers.Linear Power Amplifier is difficult for producing harmonic wave, and signal is true to nature, but Linear Power Amplifier efficient is low; But not Linear Power Amplifier harmonic distortion is required is not very high, such as the D class power amplifier that is developing etc.Non-linear power amplifier mainly adopts pulse width modulating technology (PWM technology) to realize power amplification can obtaining very high efficient.
In wireless domain, the broadband is growing, and transmitting no longer is the signal of constant amplitude.In order to improve the utilance of frequency spectrum resource; Wide-band modulation generally is non-constant envelope modulation, and the amplitude that is to say radio frequency is along with the time changes, in order to guarantee the true to nature of amplitude information; Also prevent to produce the Harmonic Interference adjacent channel, power amplifier is generally operational in linear mode.When amplitude is reduced to along with change of time when very little, the utilance of power supply is very low, and most of voltage of power supply all is added in the drain electrode of power tube, has become thermal losses.
At present, in order to improve the utilance of power supply, envelope following (ET, envelope Tracking) technology has been proposed.The ET technology is exactly: when amplitude diminishes, when letting supply power voltage and then diminish, the voltage in the drain electrode is also reduced, thereby reduce thermal losses, improve power amplification efficiency.Envelope is eliminated and is recovered (EER, envelope elimination and restoeration) and compare the ET technology, has envelope variation speed faster; But the power amplifier in the ET technology is a linear work, and the power amplifier of EER then works in on-off modes such as E class, F class; In EER, envelope information then all adds to power supply, accomplishes Modulation and Amplitude Modulation by power supply; As long as the efficient of power supply itself is very high, the whole efficiency of EER power amplifier also can be very high so.
As shown in Figure 1, be the circuit diagram of the power supply of ET in the prior art; In the figure, the power supply of ET comprises: N road voltage source (among the figure shown in the V1-Vn), and switch of every road voltage source series connection (among the figure shown in the S1-Sn) and diode (among the figure shown in the D1-Dn) in addition, also comprise comparator; When each switch opens; Control corresponding with it and driving send to the corresponding comparator of this switch with corresponding reference voltage; The envelope signal of the comparator self-recification device in future that this switch is corresponding compares with N the reference voltage that receives, and selects one road voltage as the output voltage powering load according to comparative result.
In research and practice process to prior art; Inventor of the present invention finds that in the existing implementation, a switch will flow through whole electric currents of need of load; Need the big Metal-oxide-semicondutor-half field effect transistor of current capacity (MOSFE T; Metal-Oxide-Semiconductor Field-Effect Transistor) be used as switch element, and that big current MOS FET opens required gate charge Qg is big, influences the speed of switch.In addition, since the floating ground of MOSFET, poor controllability.
Summary of the invention
The embodiment of the invention provides a kind of method of supplying power to, supply unit and base station radio frequency system that is used for power amplification, to reduce the electric current through switchgear, improves the speed of this switchgear; Because switchgear is not floatingly, control easily; When increasing feedback signal, can effectively improve the precision of power supply.
For this reason, the present invention is that embodiment provides a kind of supply unit that is used for power amplification, comprising: a linear amplification unit, and the branch road of control appliance and the parallel connection of N bar, N is not less than 2 integer; Wherein, every branch road comprises a current source, first switchgear and a second switch equipment; First switchgear on every branch road respectively with this branch road on current source link to each other with the second open pipe equipment on this branch road;
N current source is used for exporting respectively N road electric current;
Said control appliance is used for the given signal of received current, and according to the closed of the given signal controlling N of said electric current first switchgear or break off;
Said first switchgear is used for breaking off or closure according to the control of control appliance; When first switchgear broke off, the current source on the corresponding branch road outputed current to second switch equipment; When first switchgear was closed, the current source on the corresponding branch road was short-circuit ground;
Said second switch equipment is used for electric current is carried out one-way transmission, with the current delivery of current source output to load, prevent electric current from load flow to first switchgear;
Said linear amplification unit; Link to each other with the output of second switch equipment; Be used for the voltage signal to be amplified that receives is amplified, make voltage signal and said voltage signal to be amplified after the amplification linear, and the voltage signal after voltage to the said amplification of adjustment load;
Wherein, given signal of said electric current and said voltage signal to be amplified are linear relationship or time delay relation.
Correspondingly, the embodiment of the invention provides a kind of method of supplying power to that is used for power amplification, and the supply unit based on above-mentioned comprises:
Control appliance makes the current source output and the given signal current corresponding of said electric current of N bar branch road according to the closed or disconnection of the given signal controlling N of electric current that receives first switchgear, and N is not less than 2 integer;
When said first switchgear broke off, the current source on the corresponding branch road outputed current to second switch equipment; When said first switchgear was closed, the current source on the corresponding branch road was short-circuit ground; Wherein, said second switch equipment is used for electric current is carried out one-way transmission, with the current delivery of current source output to load, prevent electric current from load flow to first switchgear;
Linear amplification unit amplifies the voltage signal to be amplified that receives, and makes voltage signal and said voltage signal to be amplified after the amplification linear, and the voltage signal after voltage to the said amplification of adjustment load;
Wherein, given signal of said electric current and said voltage signal to be amplified are linear relationship or time delay relation.
Correspondingly, the embodiment of the invention also provides a kind of base station radio frequency system, comprises above-mentioned supply unit, RF power amplification and radio-frequency antenna;
Said supply unit is used to said RF power amplification power supply;
Said RF power amplification is used for the input signal of RF power amplification is amplified as the load of said supply unit, and output RF power amplification output signal;
Said radio-frequency antenna is used to send said RF power amplification output signal.
Can be known that by technique scheme the embodiment of the invention passes through to use N road current source, thereby makes the electric current that flows through single switching transistor very little, low current device obtains at a high speed easily; Because the direct ground connection of switchgear, promptly switchgear does not float ground, so switchgear is controlled easily; Hence one can see that, and the embodiment of the invention can realize the high speed pressure regulation, is applied to the efficient and the linearity that radio frequency ET or EER power amplifier can improve power amplifier; Can play energy-conservation with improve the effect of performance.
Description of drawings
Fig. 1 is the circuit diagram of the power supply of ET in the prior art;
A kind of structural representation that is used for the supply unit of power amplification that Fig. 2 provides for the embodiment of the invention 1;
A kind of structural representation that is used for the supply unit of power amplification that Fig. 3 provides for the embodiment of the invention 2;
A kind of structural representation that is used for the supply unit of power amplification that Fig. 4 provides for the embodiment of the invention 3;
A kind of structural representation that is used for the supply unit of power amplification that Fig. 5 provides for the embodiment of the invention 4;
A kind of structural representation that is used for the supply unit of power amplification that Fig. 6 provides for the embodiment of the invention 5;
Fig. 7 is a kind of circuit theory diagrams that are used for the supply unit of power amplification of the embodiment of the invention 1;
Fig. 8 is the signal waveforms of input signal 1 in the embodiment of the invention;
Fig. 9 is the signal waveforms of input signal 2 in the embodiment of the invention;
Figure 10 is the signal waveforms of current source in the embodiment of the invention;
Figure 11 is the signal waveforms of pulse step ripple electric current in the embodiment of the invention;
Figure 12 is the signal waveforms of load current in the embodiment of the invention;
Figure 13 is the signal waveforms of load voltage in the embodiment of the invention;
Figure 14 is a kind of circuit theory diagrams that are used for the supply unit of power amplification of the embodiment of the invention 3;
Figure 15 is a kind of circuit theory diagrams that are used for the supply unit of power amplification of the embodiment of the invention 2;
Figure 16 is a kind of circuit theory diagrams that are used for the supply unit of power amplification of the embodiment of the invention 4;
Figure 17 is a kind of circuit theory diagrams that are used for the supply unit of power amplification of the embodiment of the invention 5;
A kind of flow chart that is used for the method for supplying power to of power amplification that Figure 18 provides for the embodiment of the invention;
The structural representation of a kind of base station radio frequency system that Figure 19 provides for the embodiment of the invention.
Embodiment
Below we will combine accompanying drawing, optimum implementation of the present invention is described in detail.
See also Fig. 2; A kind of structural representation that is used for the supply unit of power amplification that provides for the embodiment of the invention 1; In this embodiment, the said supply unit that is used for power amplification comprises: 21, one control appliances of a linear amplification unit 22 and N bar current branch; Wherein, every current branch comprises a current source, first switchgear and a second switch equipment; First switchgear on every current branch links to each other with the second open pipe equipment with current source respectively.Specifically as shown in Figure 2, supply unit specifically comprises: 21, one control appliances 22 of a linear amplification unit, a N current source 23, N first switchgear 24 and N second switch equipment 25; N current source 23, N first switchgear 24 and N second switch equipment 25 are formed N bar current branch respectively.
A said N current source 23 is used to output current to first switchgear, perhaps second switch equipment and load.
Said control appliance 22 is used for the given signal of received current, and transmits control signal to one or more first switchgears according to the given signal of said electric current, makes output of N bar current branch and the given signal current corresponding of said electric current; Specifically can make one of N current source output and the given signal of said electric current be the electric current of linear approximate relationship; Because the electric current of output is a staircase waveform; And the given signal of electric current possibly be various rules or irregular waveform or digital signal; So the output of N bar current branch is not necessarily linear fully with the given signal of said electric current with the given signal current corresponding of said electric current, but is linear approximate relationship.Wherein, the given signal of said electric current can comprise: the voltage signal of the voltage signal that voltage signal to be amplified obtains through conversion, the voltage signal of load feedback or linear amplification unit 21 outputs feedback etc.; Perhaps; With the voltage signal of processor, data signal processor or analog circuit output as the given signal of electric current; Relation between the voltage signal of said output and the said voltage signal to be amplified is time-delay relation or functional relation; Wherein, when the voltage signal of said output and the relation between the said voltage signal to be amplified concerned for time-delay, said voltage signal to be amplified lagged behind the given signal of electric current.Certainly, the given signal of electric current also can be the signal of other equipment outputs, and present embodiment does not limit.
Said first switchgear 24 is used for breaking off or closure according to the control signal that receives control appliance 22 transmissions, and when first switchgear 24 broke off, the current source on the corresponding branch road outputed current to second switch equipment 25 and load; When first switchgear, 24 closures, the electric current of current source 23 outputs on the corresponding branch road is short-circuit ground.
Said second switch equipment 25 has unidirectional conducting effect, is used for electric current is carried out one-way transmission; When first switchgear breaks off; Export the electric current of the output of the current source on the corresponding branch road to load; That is to say that the electric current defeated 23 of first switchgear 24 output that second switch equipment 25 will receive goes out to load, and prevent that electric current from returning from load and flow to first switchgear; Perhaps when first switchgear was closed, second switch equipment 25 ended, prevent electric current from load flow to first switchgear.
Said linear amplification unit 21; Link to each other with the output of second switch equipment; Be used for the voltage signal to be amplified that receives is amplified, make voltage signal and said voltage signal to be amplified after the amplification linear, and the voltage signal after voltage to the said amplification of adjustment load.When voltage signal to the said amplification of the voltage of adjustment load, can directly the voltage signal after amplifying be loaded into the load two ends.
In other embodiments; Structural representation with reference to embodiment 2 shown in Figure 3; The said supply unit that is used for power amplification can also comprise: signal conversion unit 26; Be used for the said voltage signal to be amplified that receives is carried out certain conversion (like scale operation), as the given signal of electric current, and the given signal of said electric current exported the voltage signal after the conversion to control appliance 22.
In other embodiments; Structural representation with reference to embodiment 3 shown in Figure 4; The said supply unit that is used for power amplification can also comprise: current detecting unit 27, link to each other with load, and be used to detect the electric current of load; And with detected current signal as the given signal of electric current, export control appliance 22 to.
In other embodiments; Structural representation with reference to embodiment 4 shown in Figure 5; The said supply unit that is used for power amplification can also comprise: feedback unit 28; Be used to receive the feedback signal of said linear amplification unit output output, and export said feedback signal to control appliance 22 as the given signal of electric current.
In other embodiments; Structural representation with reference to embodiment 5 shown in Figure 6; The said supply unit that is used for power amplification can also comprise: compensating unit 29; Be used to receive and be input to said voltage signal to be amplified and the load voltage of treating amplifying unit, and compensate, and the electric current after will compensating exports load to according to the error of the sampled signal of said voltage signal to be amplified and said load voltage.
Preferably; In the above-described embodiments, the said supply unit that is used for power amplification can also comprise: the capacitor filtering unit is used for the electric current through the output of second switch equipment that receives is carried out filtering; Obtain a level and smooth electric current, and export this level and smooth electric current to load.
Said first switchgear 24 can for: single knife switch or effect and function and its be other devices similarly; Said second switch equipment can be single knife switch or diode, perhaps similar other devices of effect and function and its.
In embodiments of the present invention, said control appliance 22 can be: comparator, perhaps analog to digital converter, perhaps digital processing unit and Drive and Control Circuit; Said linear amplification unit 21 can be: linear amplifier.
For the ease of those skilled in the art's understanding, explain with concrete embodiment below.
Also see also Fig. 7, be a kind of circuit theory diagrams that are used for the supply unit of power amplification that provide in the embodiment of the invention 1; In this embodiment, voltage signal to be amplified is an example with input signal 1 (input signal 1 is a voltage signal in the present embodiment), and the given signal of electric current is an example with input signal 2; Specifically as shown in Figure 7, comprising: N current source be (I1, I2 1.; ..., In), a N diode 3. (D1, D2; Dn, present embodiment with the diode be example as second switch equipment, but be not limited to this), 2. (SW1 of a N switchgear; SW2 ... SWn, present embodiment with the switchgear be example as first switchgear, but be not limited to this), control circuit 4., linear amplification unit 5..3. 1. N current source be connected to load through N diode respectively, simultaneously, 2. receives ground through N switchgear.When 2. certain switchgear broke off, 3. the electric current of pairing current source output flowed to load through diode, and simultaneously, 3. diode also has the function that stops electric current to return from load; When switchgear was 2. closed, the electric current that 1. export in the corresponding current source was shorted to ground.4. control circuit is used for according to the input signal 2 that receives, and in conjunction with the parameter of self, 2. output appropriate control signal removes control switch equipment, exports one and the linear basically electric current of input signal 2; For example; Comparator or the analog/digital converter (ADC of control circuit in 4.; Analog-to-digital converter) input signal that receives 2 and several reference signals of self setting are compared controlled signal; Remove to control 2. closed of each switchgear or break off according to said control signal, make one of output and input signal 2 be the electric current of linear approximate relationship; Such as, suppose to have two comparators, set two reference signals and be respectively 1V and 2V, corresponding current is 1A and 2A respectively; So, when input signal 2 reaches 1V, a comparator toggles output low level; Remove off switch equipment the 1st way switch 2., output 1A electric current is given load, when input signal 2 reaches 2V; Another comparator output low level of also overturning goes also to close switchgear the 2nd way switch 2., so just can export the electric current of 2A and give load.Said input signal 2 is certain functional relation with input signal 1, and this functional relation can comprise linear relationship or time delay relation; For example,, arrive output simultaneously, generally can deliberately let input signal 2 leading input signals 1 in order to make input signal 1 and input signal 2 because switchgear is slower than the response speed of linear element (be linear amplification unit 5.).Input signal 2 can be load voltage or the load voltage envelope that (such as load) feeds back from the rear end; Input signal 2 also can be the signal of directly being brought by front end; Present embodiment does not limit.
In the present embodiment, for I1, I2 ... The value of In can be to get identical value, with reference to Figure 10; Also different value can be got,,, 8A (ampere) can be got respectively such as 4 current sources are arranged as by the binary weights value, 4A, 2A, 1A, like this, 4 current sources just can be exported 16 kinds of current values.
5. linear amplification unit can amplify the input signal 1 that receives more accurately, makes output voltage and input signal 1 accurately linear, and linear amplification unit can be introduced the feedback signal from output, also can not introduce.Present embodiment does not limit.5. linear amplification unit can be linear amplifier.
In the present embodiment, 1. current source provides most of electric current, and 5. linear amplification unit only provides the sub-fraction electric current, and like this, linear element (be linear amplification unit 5.) loss has just reduced greatly.5. said linear amplification unit can comprise linear amplifier, and the input signal 1 of linear amplifier input can be the envelope signal of radio frequency to be amplified.
The concrete implementation procedure of present embodiment comprises: 3. 2. 1. current source export a pulse step ripple electric current I o1 (with reference to Figure 11) in the back with diode through switchgear; This Io1 can be directly inputted into load; Also can 6. carry out rectifying and wave-filtering through a capacitor filtering unit; Present embodiment is an example with capacitor C 1, is rectified into a comparatively level and smooth electric current I o (with reference to Figure 12) to grading current Io1, exports load then to; Wherein, the capacitor filtering unit can comprise a capacitor C 1, and C1 is not necessarily lumped parameter, possibly be parasitic capacitance of device etc.
Will very high pace of change if output to the voltage Vout of load, then need reduce the capacity of C1 as far as possible.In order to reduce error, reduce the distortion factor, adopt linear amplification unit 5. to come rectification error.5. linear amplification unit has the voltage follow characteristic, linear through voltage and input voltage that 5. linear amplifier is exported, expresses as follows with mathematic(al) representation:
Vout=V0+k*vi,
Wherein, Vout is the load voltage of output, and vi is an input signal 1, and V0 and k are real constants.
With linear amplification unit 5. output be connected with diode output 3., as output current Io1 during greater than load current Io, linear amplification unit is the electric current of absorbing redundant (Io1-Io) 5.; As Io1 Xiao Yu during in load current Io, 5. linear amplifier then provides not enough electric current (Io-Io1); Because load impedance one regularly output voltage V out is directly proportional with load current Io, thereby the output voltage of whole power supply is changed along with the variation of input signal 1.Wherein, 2 one-tenth certain functional relations of input signal 1 and input signal, this functional relation comprise the time delay relation.The waveform of each signal such as Fig. 8 to Figure 13 are example in the embodiment of the invention.(present embodiment is an example with the signal of n current source output); Wherein Fig. 8 and Fig. 9 are respectively the signal waveforms of input signal in the embodiment of the invention 1 and input signal 2; Figure 10 is a current source signal waveforms 1. in the embodiment of the invention; Figure 11 is the signal waveforms of output current Io1 in the embodiment of the invention; Output current Io1 is a pulse step ripple electric current among Figure 11, and Figure 12 is the signal waveforms of load current Io in the embodiment of the invention, and Figure 13 is the signal waveforms of load voltage Vout in the embodiment of the invention.
In the embodiment shown in fig. 7,5. linear amplification unit can be introduced feedback and improve tracking accuracy, and this feedback is drawn by linear amplification unit output 5., feeds back to linear amplification unit input 5., and is shown by dashed lines in Fig. 7.5. whether linear amplification unit introduce feedback, is optional, that is to say that feedback is optional; In the time of need not feeding back, though tracking accuracy maybe be a little bit poorer,, the more difficult vibration that works together, stability is better.5. linear amplification unit can be introduced to feed back and improve tracking accuracy in other embodiments, repeats no more below.
Also see also Figure 14, be a kind of circuit theory diagrams that are used for the supply unit of power amplification that provide in the embodiment of the invention 3; In this embodiment, the given signal of electric current is an example with load current or load current envelope, treats that amplifying signal is with the RF envelope signal; Be that envelope voltage is an example, this embodiment is on the basis of Fig. 7 embodiment, and said power supply can also comprise current detecting unit; At this embodiment; 7. current detecting unit is example with current sensor, but is not limited to this, specifically shown in figure 14.
Among this embodiment, in the moment of 1. powering on for current source, 2. all switchgears possibly be in nondeterministic statement (certainly; Also can lock-on circuit be in certain state); 1. all current sources all possibly provide more high-power to load, and at this moment, the linear element loss maybe be very big.But afterwards; Linear amplification unit 5. (is example with the linear amplifier) can be adjusted to suitable value with the load voltage according to the voltage signal to be amplified that receives; For example, 5. linear amplification unit amplifies voltage signal to be amplified, generates the voltage signal after amplifying; Voltage signal after will amplifying then is added in the load, makes the voltage signal after the voltage of load equals this this amplification.Detailed process is: when voltage signal to be amplified increased, 5. linear amplification unit can follow up immediately, made load voltage increase to the size of the voltage signal after the amplification; At this moment, the increase of load voltage can cause the increase of load current, and 5. the load current of increase is provided by linear amplification unit; 4. control circuit can detect this load current that has increased then, and 2. the output control signal corresponding removes to control corresponding switch equipment, breaks off one or more switchgears 2.; Thereby increase the electric current that current source exports load to; The way that promptly increases the current source of output makes the electric current of output big to enough, is mainly 1. provided by current source up to the electric current that outputs to load, and 5. final linear amplification unit only provides (or absorption) sub-fraction electric current to load; Like this, the linear element loss has just reduced greatly; Otherwise when voltage signal to be amplified reduced to cause load current to reduce, 5. linear amplification unit can fall unnecessary current absorption; 4. control circuit can detect this load current that has reduced then; Thereby the way that reduces the current source of output makes the electric current of output to enough little, and up to approaching with the load current size, 5. family's neutral line amplifying unit only provides (or absorption) sub-fraction electric current to load; Like this, the linear element loss has just reduced greatly.In order to reduce linear amplification unit loss 5., will let linear amplification unit 5. short as far as possible as far as possible, therefore through the time of big electric current.Control such as the comparator in the control circuit and driving element should use high speed device, to reduce time-delay.Diode Dn among Figure 14 (n=1,2,3 ...) be used for preventing when SWn (n=1,2,3 ...) when closed load by short circuit.Diode also can change MOSFET (metal-oxide-semiconductor field-effect, metal oxide semiconductor field effect tube) into and wait other controllable semiconductor switches.
Also see also Figure 15, be a kind of circuit theory diagrams that are used for the supply unit of power amplification that provide in the embodiment of the invention 2; In this embodiment, voltage signal to be amplified is an example with input signal 1, and the given signal of electric current is an example with input signal 2; The envelope voltage that is the signal of RF envelope is an example; This embodiment is on the basis of Fig. 7 embodiment, and 8. said supply unit can also comprise signal conversion unit, is used for changing receiving said input signal 1; As input signal 2, and 4. said input signal 2 exported the signal after the conversion to control circuit.In this embodiment promptly, signal conversion unit is 8. with input signal 1, according to load characteristic; Through certain processing (such as scale operation); And 4. the signal after will changeing then, exports control circuit to as input signal 2; Control circuit is 4. according to input signal 2, and control multichannel current source is powering load 1..Wherein, scale operation can be proportionally to amplify or proportionally dwindle etc., is about to input signal 1 and proportionally amplifies or proportionally dwindle, and generates the signal after handling, and the signal after handling with this is as input signal 2.
Also see also Figure 16, be a kind of circuit theory diagrams that are used for the supply unit of power amplification that provide in the embodiment of the invention 4; In this embodiment, voltage signal to be amplified is an example with input signal 1, and the given signal of electric current is an example with input signal 2; This embodiment is on the basis of Fig. 7 embodiment, and 9. said supply unit can also comprise the signal feedback unit, is used to receive the feedback signal that the linear amplification unit output returns; And export said feedback signal to control appliance as the given signal of electric current, in this embodiment, feedback unit is 9. behind the signal that receives linear amplifier output; With this signal carry out certain processing (such as dividing potential drop) back as input signal 2 input control circuits 4. in; Then, control circuit is 4. according to input signal 2, and control multichannel current source is powering load 1..The implementation procedure of other of this embodiment sees the description of Fig. 7 for details, repeats no more at this.
Also see also Figure 17, be a kind of circuit theory diagrams that are used for the supply unit of power amplification that provide in the embodiment of the invention 5; In this embodiment, voltage signal to be amplified is an example with input signal 1, and the given signal of electric current is an example with input signal 2; The envelope voltage that is the RF envelope signal is an example; This embodiment is on the basis of Fig. 7 embodiment, and 10. said supply unit can also comprise compensating unit, is used to receive voltage signal to be amplified and load voltage; And the error of said voltage signal to be amplified and said load voltage compensated, and compensated voltage is inputed to load.10. said compensating unit can comprise: compensating current element Ix, the 3rd switchgear (is example with SWx), the 4th switchgear (is example with diode Dx), error amplifying unit are 8..Wherein, 8. the error amplifying unit can comprise: error amplifier, control and drive circuit.In this embodiment, said compensating current element is used to output current to load; Said error amplifying unit 8.; Be used to receive said voltage signal to be amplified and load voltage; And the error of amplifying said voltage signal to be amplified and said load voltage, transmit control signal to the 3rd switch according to said error, control the closed or disconnection of the 3rd switchgear; Said the 3rd switchgear is used for carrying out closure or disconnection according to receiving the control signal that 8. the error amplifying unit sends; When the 3rd switchgear broke off, the electric current of compensating current element Ix output exported the 4th switchgear to; When the 3rd switchgear was closed, the electric current of corresponding current sources output was short-circuit ground; Said the 4th switchgear is used for exporting the electric current of the 3rd switchgear output to load, and stops electric current to return from load.Wherein, said the 3rd switchgear can for: single knife switch or effect and function and its be other devices similarly; Said the 4th switchgear can be single knife switch or diode, perhaps similar other devices of effect and function and its.
Specifically shown in figure 17, when current source way 1. was too many, it is too complicated that circuit can become, when way very little the time, error too big and cause linear amplifier 5. hear rate increase.For this reason, increased a compensating unit in the present embodiment 10..10. output current is little owing to compensating unit, can make it be operated in very high frequency.Control mode can be used pulse-width modulation (PWM, Pulse Width Modulation), Frequency-variable Modulation (PFM, Pulse Frequency conversion Modulation), and ring control perhaps stagnates.The ring control response speed that stagnates piece.Compensating unit output current 10. can the compensating error electric current, can keep sufficiently high efficient again.Compensating unit input signal and the input of linear amplifier 10. can be same signal or linear signal.The implementation procedure of other of this embodiment sees the description of Fig. 7 for details, repeats no more at this.
This shows that the embodiment of the invention is primarily aimed at the RF power amplification field, but be not limited thereto the field.Adopt the supply unit of the method for the invention manufacturing can have very high dynamic voltage adjustment speed, can reach high speed arbitrarily theoretically; Can have good fidelity and very high efficient; The RF power amplification ET power supply that utilizes embodiment of the invention technology to make can obtain high efficiency; The RF power amplification EER power supply that adopts the embodiment of the invention to make can obtain the high efficiency and the excellent linearity.The present invention compared with prior art because the electric current of the single switching transistor that uses is very little, low current device obtains at a high speed easily; Switchgear not floatingly is not controlled easily; As adding feedback, stability might as well.That is to say that the embodiment of the invention can be applied to any occasion and power amplification occasion that the pressure regulation demand is arranged.Like RF power amplification, audio frequency power amplifier etc.Wherein, when realizing the high speed pressure regulation, be applied to the efficient and the linearity that radio frequency ET or EER power amplifier can improve power amplifier; Thereby play energy-conservation with improve the effect of performance.
Based on the specific embodiment function of above-mentioned supply unit and the implementation procedure of effect, corresponding, the embodiment of the invention also provides a kind of method of supplying power to that is used for power amplification, and its flow chart is shown in figure 18, and said method comprises:
Step 201: control appliance makes the current source output and the given signal current corresponding of said electric current of N bar branch road according to the closed or disconnection of the given signal controlling N of electric current that receives first switchgear;
Step 202: when said first switchgear broke off, the current source on the corresponding branch road outputed current to second switch equipment; When said first switchgear was closed, the current source on the corresponding branch road was short-circuit ground; Wherein, said second switch equipment is used for electric current is carried out one-way transmission, with the current delivery of current source output to load, prevent electric current from load flow to first switchgear;
Step 203: linear amplification unit amplifies the voltage signal to be amplified that receives, and makes voltage signal and said voltage signal to be amplified after the amplification linear, and the voltage signal after voltage to the said amplification of adjustment load.
Wherein, the given signal of said electric current specifically comprise following any:
Change receiving said voltage signal to be amplified, with the conversion after voltage signal as the given signal of electric current; Or
Detect the electric current of load, and with detected current signal as the given signal of electric current; Or
With the feedback signal of said linear amplification unit output as the given signal of electric current; Or
Voltage signal to be amplified is handled, and the voltage signal of generation and voltage signal to be amplified time-delay relation or functional relation is as the given signal of electric current.
In addition, given signal of said electric current and voltage signal to be amplified can also exist time-delay relation or certain functional relation each other.That is to say; The given signal of this electric current also can be (such as processor, data signal processor or analog circuit by miscellaneous equipment; But be not limited to this) the direct signal of exporting, the signal of this output and voltage signal to be amplified can exist time-delay relation or certain functional relation each other.When existing time-delay to concern, generally be that voltage signal to be amplified falls behind than the given signal of electric current.
Wherein, said method can also comprise:
Electric current to the output of second switch equipment carries out filtering, obtains a level and smooth electric current, and exports said level and smooth electric current to load.
The implementation procedure of each step specifically sees implementation procedure corresponding among the said apparatus embodiment for details in the said method, repeats no more at this.
Accordingly, the embodiment of the invention also provides a kind of base station radio frequency system, and its structural representation sees Figure 19 for details, and said base station radio frequency system comprises: above-mentioned any is used for the supply unit 191 of power amplification, and RF power amplification 192 and radio-frequency antenna 193; Wherein, said supply unit 191 is used to said RF power amplification power supply; Said RF power amplification 192 is used for the input signal of RF power amplification is amplified as the load of said supply unit, and output RF power amplification output signal; Said radio-frequency antenna 153 is used to send said RF power amplification output signal.
Wherein, any concrete structure of said supply unit 191 sees for details above-mentioned, repeats no more at this.
The method of present embodiment passes through to use N road current source, thereby makes the electric current that flows through single switching transistor very little, and low current device obtains at a high speed easily; Because the direct ground connection of switchgear, promptly switchgear does not float ground, so switchgear is controlled easily; Can also be with the input of signal feedback to the linear amplification unit of linear amplification unit output, to improve the precision of power supply, hence one can see that, and the embodiment of the invention can realize the high speed pressure regulation, is applied to the efficient and the linearity that radio frequency ET or EER power amplifier can improve power amplifier; Can play energy-conservation with improve the effect of performance.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product can be stored in the storage medium, like ROM/RAM, magnetic disc, CD etc., comprises that some instructions are with so that a computer equipment (can be a personal computer; Server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (12)
1. a supply unit that is used for power amplification is characterized in that, comprising: a linear amplification unit, and the branch road of control appliance and the parallel connection of N bar, N is not less than 2 integer; Wherein, every branch road comprises a current source, first switchgear and a second switch equipment; First switchgear on every branch road respectively with this branch road on current source link to each other with the second open pipe equipment on this branch road;
N current source is used for exporting respectively N road electric current;
Said control appliance is used for the given signal of received current, and according to the closed of the given signal controlling N of said electric current first switchgear or break off;
Said first switchgear is used for breaking off or closure according to the control of control appliance; When first switchgear broke off, the current source on the corresponding branch road outputed current to second switch equipment; When first switchgear was closed, the current source on the corresponding branch road was short-circuit ground;
Said second switch equipment is used for electric current is carried out one-way transmission, with the current delivery of current source output to load, prevent electric current from load flow to first switchgear;
Said linear amplification unit; Link to each other with the output of second switch equipment; Be used for the voltage signal to be amplified that receives is amplified, make voltage signal and said voltage signal to be amplified after the amplification linear, and the voltage signal after voltage to the said amplification of adjustment load;
Wherein, given signal of said electric current and said voltage signal to be amplified are linear relationship or time delay relation.
2. device according to claim 1 is characterized in that, also comprises:
Signal conversion unit is used for the said voltage signal to be amplified that receives is changed, and as the given signal of electric current, and the given signal of said electric current is exported the voltage signal after the conversion to said control appliance.
3. device according to claim 1 is characterized in that, also comprises:
Current detecting unit links to each other with load, is used to detect the electric current of load, and with detected current signal as the given signal of electric current, export control appliance to.
4. device according to claim 1 is characterized in that, also comprises:
Feedback unit be used to receive the signal that said linear amplification unit output is exported, and the signal that will export exports control appliance to as the given signal of electric current.
5. device according to claim 1 is characterized in that, also comprises:
Compensating unit is used to receive the voltage signal to be amplified and the load voltage that are input to said linear amplification unit, and compensates according to the error of said voltage signal to be amplified and said load voltage, and the electric current after will compensating exports load to.
6. device according to claim 5 is characterized in that, said compensating unit comprises: compensating current element, the 3rd switchgear, the 4th switchgear, error amplifying unit, wherein,
Said compensating current element is used for output current;
Said error amplifying unit is used to receive the voltage signal to be amplified and the load voltage that are input to said linear amplification unit, and the error of amplifying said voltage signal to be amplified and load voltage, according to the closed or disconnection of said ERROR CONTROL the 3rd switchgear;
Said the 3rd switchgear is used for breaking off or closure according to the control of error amplifying unit; When the 3rd switchgear breaks off, compensating current element is outputed current to the 4th switchgear; When the 3rd switchgear was closed, compensating current element was short-circuit ground;
Said the 4th switchgear is used for electric current is carried out one-way transmission, with the current delivery of compensating current element output to load, and prevent electric current from load flow to the 3rd switchgear.
7. according to each described device of claim 1 to 6, it is characterized in that, also comprise:
The capacitor filtering unit is used for the electric current of said second switch equipment output is carried out filtering, obtains a level and smooth electric current, and exports this level and smooth electric current to load.
8. device according to claim 6 is characterized in that, also comprises:
The capacitor filtering unit is used for the electric current of said the 4th switchgear output is carried out filtering, obtains a level and smooth electric current, and exports this level and smooth electric current to load.
9. a base station radio frequency system comprises each described supply unit of claim 1 to 8, RF power amplification and radio-frequency antenna;
Said supply unit is used to said RF power amplification power supply;
Said RF power amplification is used for the input signal of RF power amplification is amplified as the load of said supply unit, and output RF power amplification output signal;
Said radio-frequency antenna is used to send said RF power amplification output signal.
10. a method of supplying power to that is used for power amplification is characterized in that, based on each described supply unit of claim 1 to 8, comprising:
Control appliance makes the current source output and the given signal current corresponding of said electric current of N bar branch road according to the closed or disconnection of the given signal controlling N of electric current that receives first switchgear, and N is not less than 2 integer;
When said first switchgear broke off, the current source on the corresponding branch road outputed current to second switch equipment; When said first switchgear was closed, the current source on the corresponding branch road was short-circuit ground; Wherein, said second switch equipment is used for electric current is carried out one-way transmission, with the current delivery of current source output to load, prevent electric current from load flow to first switchgear;
Linear amplification unit amplifies the voltage signal to be amplified that receives, and makes voltage signal and said voltage signal to be amplified after the amplification linear, and the voltage signal after voltage to the said amplification of adjustment load;
Wherein, given signal of said electric current and said voltage signal to be amplified are linear relationship or time delay relation.
11. method according to claim 10 is characterized in that, the obtain manner of the given signal of said electric current comprises:
Change receiving said voltage signal to be amplified, with the conversion after voltage signal as the given signal of electric current; Or
Detect the electric current of load, and with detected current signal as the given signal of electric current; Or
With the feedback signal of said linear amplification unit output as the given signal of electric current; Or
Voltage signal to be amplified is handled, and the voltage signal of generation and voltage signal to be amplified time-delay relation or functional relation is as the given signal of electric current.
12. according to each described method of claim 10 to 11, it is characterized in that, also comprise:
Electric current to the output of second switch equipment carries out filtering, obtains a level and smooth electric current, and exports said level and smooth electric current to load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910142159A CN101902204B (en) | 2009-06-01 | 2009-06-01 | Power supply method, power source device and base station radio frequency system for power amplification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910142159A CN101902204B (en) | 2009-06-01 | 2009-06-01 | Power supply method, power source device and base station radio frequency system for power amplification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101902204A CN101902204A (en) | 2010-12-01 |
| CN101902204B true CN101902204B (en) | 2012-10-03 |
Family
ID=43227463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910142159A Active CN101902204B (en) | 2009-06-01 | 2009-06-01 | Power supply method, power source device and base station radio frequency system for power amplification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101902204B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855250B (en) * | 2019-11-29 | 2023-04-18 | 哈尔滨工业大学 | Linear power amplifier driving method with variable power supply voltage |
| CN113193839B (en) * | 2021-04-08 | 2022-10-04 | 成都蕊感微电子有限公司 | Signal receiving and amplifying circuit and sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7342457B2 (en) * | 2002-03-11 | 2008-03-11 | California Institute Of Technology | Cross-differential amplifier |
-
2009
- 2009-06-01 CN CN200910142159A patent/CN101902204B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7342457B2 (en) * | 2002-03-11 | 2008-03-11 | California Institute Of Technology | Cross-differential amplifier |
Non-Patent Citations (5)
| Title |
|---|
| Akihiro kanbe等.New Architecture for envelope-tracking power amplifier for base station.《circuits and systems 2008,APCCA 2008》.IEEE,2008, * |
| Mikkel C. W. Hø |
| Mikkel C. W. Høyerby等.A Comparative Study of Analog Voltage-mode Control Methods for Ultra-Fast Tracking Power Supplies.《power electronics specialists conference, 2007, PESC 2007》.IEEE,2007, * |
| yerby等.A 0.35μm 50V CMOS Sliding-Mode Control IC.《solid state circuits conference, 2007, ESSCIRC2007》.IEEE,2007, * |
| yerby等.A Comparative Study of Analog Voltage-mode Control Methods for Ultra-Fast Tracking Power Supplies.《power electronics specialists conference, 2007, PESC 2007》.IEEE,2007, |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101902204A (en) | 2010-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8587271B2 (en) | Envelope tracking power supply circuit and high-frequency amplifier including envelope tracking power supply circuit | |
| CN100488030C (en) | Radio frequency amplification device, power supply unit and control method thereof | |
| EP2166666B1 (en) | Power supply providing ultrafast modulation of output voltage | |
| US7808323B2 (en) | High-efficiency envelope tracking systems and methods for radio frequency power amplifiers | |
| CN105264767B (en) | Electronic equipment, the method for amplifying envelope signal, equipment and computer-readable medium | |
| KR101743014B1 (en) | Apparatus and method for increasing output efficiency in mobile communication terminal | |
| Hanington et al. | High-efficiency power amplifier using dynamic power-supply voltage for CDMA applications | |
| CN101061632B (en) | A method and system of controlling a linear power amplifier | |
| US7949316B2 (en) | High-efficiency envelope tracking systems and methods for radio frequency power amplifiers | |
| US10084369B2 (en) | Error amplifying and frequency compensating circuits and methods | |
| US20080003950A1 (en) | Controlling switching mode power supply of power amplifier | |
| KR101560423B1 (en) | Method and arrangement for generating current | |
| Lee et al. | 2.7 A hybrid supply modulator with 10dB ET operation dynamic range achieving a PAE of 42.6% at 27.0 dBm PA output power | |
| WO2018023215A1 (en) | Envelope modulator, envelope tracking power amplifier and communication device | |
| CN102868305A (en) | Envelope tracking power supply based on class-E DC (direct current)-DC converter | |
| US8902001B2 (en) | Power supply device and power amplification apparatus using same | |
| EP2602932A1 (en) | Power modulator, and method for controlling same | |
| WO2004010283A1 (en) | Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal | |
| KR101481725B1 (en) | Apparatus and method for power transmitter in wirelass communication systems | |
| CN101902204B (en) | Power supply method, power source device and base station radio frequency system for power amplification | |
| CN110995168B (en) | Envelope modulator and method applied to power amplifier | |
| JP5389567B2 (en) | High frequency amplifier and high efficiency method | |
| US8063513B2 (en) | Power source and method for controlling operational power | |
| US20240364283A1 (en) | Power Amplifier Power Supply Circuit and Communication Apparatus | |
| GB2425418A (en) | An efficient class B RF amplifier with supply voltage modulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |