CN110418400A - Symbol power tracks amplification system and its operating method and symbol tracking modulator - Google Patents

Symbol power tracks amplification system and its operating method and symbol tracking modulator Download PDF

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Publication number
CN110418400A
CN110418400A CN201910361788.1A CN201910361788A CN110418400A CN 110418400 A CN110418400 A CN 110418400A CN 201910361788 A CN201910361788 A CN 201910361788A CN 110418400 A CN110418400 A CN 110418400A
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China
Prior art keywords
voltage
symbol
signal
output
spt
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CN201910361788.1A
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CN110418400B (en
Inventor
野见山贵弘
金东秀
白志先
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority claimed from US16/233,192 external-priority patent/US20190334750A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control

Abstract

The present invention relates to a kind of symbol powers to track amplification system, includes: modem generates data and symbol tracking signal；Symbol tracking modulator, include control circuit, first voltage supply circuit and second voltage supply circuit, and switching circuit, control circuit generates first voltage level controling signal and second voltage level controling signal in response to symbol tracking signal, first voltage supply circuit generates the first output voltage in response to first voltage level controling signal, second voltage supply circuit generates the second output voltage in response to second voltage level controling signal, and switching circuit exports the first output voltage or the second output voltage for supply voltage in response to switch control signal；Radio block generates radiofrequency signal based on the data-signal from modem；And power amplifier, the power level of radiofrequency signal is adjusted based on supply voltage.The operating method and symbol tracking modulator of symbol power tracking amplification system are also provided.

Description

Symbol power tracks amplification system and its operating method and symbol tracking modulator
Cross reference to related applications
The 10-2018-0050186 South Korea applied this application claims on April 30th, 2018 in Korean Intellectual Property Office The power for No. 16/233,192 U.S. Patent application that patent application and on December 27th, 2018 apply in U.S.Patent & Trademark Office The disclosure of benefit, the patent application is incorporated herein by reference in its entirety.
Technical field
Concept of the present invention is related to a kind of symbol power tracking (symbol power tracking；SPT) amplification system, and It is filled more particularly to a kind of SPT amplification system for supporting SPT modulation technique with the wireless communication comprising SPT amplification system It sets.
Background technique
Wireless communication device (such as smart phone, tablet computer and Internet of Things (Internet of Things；IOT) Device) use wideband code division multiple access (wideband code division multiple access；WCDMA the) (third generation (3rd generation；3G)), long term evolution (long-term evolution；) and the advanced (forth generation (4th of LTE LTE generation；4G)) technology is used for high-speed communication.With the development of communication technology, the signal for sending/receiving needs peak Equal power ratio (peak-to-average power ratios；) and high bandwidth PAPRs.Therefore, when the power amplification of transmitter When the power supply of device is connected to battery, the efficiency of power amplifier be may be decreased.In order to improve power at high PAPR and high bandwidth Mean power can be used to track (average power tracking for the efficiency of amplifier；APT) technology or envelope-tracking (envelope tracking；ET) modulation technique.
ET is radio frequency (radio frequency；RF) the approach of Amplifier Design, wherein lasting adjust is connected to RF power The power supply of amplifier is to ensure with the peak efficiency operational amplifier of power needed for the individual of each transmission.When use ET modulates skill When art, the efficiency of power amplifier and linear can be improved.It is configured to that the chip of APT technology and ET modulation technique is supported to be referred to alternatively as Power supply modulator (supply modulator；SM).
It is carrying out for the 5th generation (5th-generation；5G) the research of the communication technology.Faster than the 4G communication technology 5G high-speed data communication need suitable power modulation technique.
Summary of the invention
The exemplary embodiment of concept according to the present invention provides a kind of symbol power tracking (SPT) amplification system, includes: Modem is configured to external data signal and generates data-signal and symbol tracking signal；Symbol tracking modulation Device includes control circuit, first voltage supply circuit, second voltage supply circuit and switching circuit, and wherein control circuit is matched It is set in response to symbol tracking signal and generates first voltage level controling signal and second voltage level controling signal, the first electricity Pressure supply circuit is configured to first voltage level controling signal and generates the first output voltage, second voltage supply circuit It is configured to second voltage level controling signal and generates the second output voltage, and switching circuit is configured to from control Switch control signal that circuit processed provides and one in the first output voltage and the second output voltage is exported as supply voltage； Radio frequency (RF) block is configured to generate RF signal based on the data-signal from modem；And power amplifier, it is configured to The power level of RF signal is adjusted based on the supply voltage exported from symbol tracking modulator.
The exemplary embodiment of concept according to the present invention, provide a kind of symbol tracking modulator, include: control circuit is matched It is set in response to symbol tracking signal and generates the first reference voltage and the second reference voltage；First voltage supply circuit, configuration The first output voltage is generated in response to the first reference voltage；Second voltage supply circuit is configured to the second reference Voltage and generate the second output voltage；And switching circuit, the switch control signal provided from control circuit is provided And one in the first output voltage and the second output voltage is exported as supply voltage.
The exemplary embodiment of concept according to the present invention provides a kind of method for operating SPT amplification system, includes: being based on Indicate that at least one parameter of communication environment receives communication environment information at modem；It is being adjusted based on communication environment information The number for the symbol for including in set of symbols unit is determined at modulator-demodulator；And based on set of symbols unit via modem come Control SPT amplification system.
Detailed description of the invention
By reference to the exemplary embodiment of attached drawing the present invention is described in detail concept, above and other spy of concept of the present invention Sign will become apparent, in the accompanying drawings:
Fig. 1 is the schematic block diagram of the wireless communication device of the exemplary embodiment of concept according to the present invention.
Fig. 2A and Fig. 2 B is the schematic diagram for showing mean power tracking technique.
Fig. 3 A and Fig. 3 B are symbol power tracking (SPT) the modulation skills for showing the exemplary embodiment of concept according to the present invention The schematic diagram of art.
Fig. 4 A and Fig. 4 B are the block diagrams of the symbol tracking modulator of the exemplary embodiment of concept according to the present invention.
Fig. 5 is the circuit diagram of the symbol tracking modulator of the exemplary embodiment of concept according to the present invention.
Fig. 6 is the schematic diagram of the signal operated for the symbol tracking modulator of Fig. 5.
Fig. 7 A is the circuit diagram of the symbol tracking modulator according to the embodiment for capableing of quick charge control, and Fig. 7 B is to show It is configured to carry out the block diagram of the operation of the quick charge control circuit of quick charge control out.
Fig. 8 is the block diagram of the modem of the exemplary embodiment of concept according to the present invention.
Fig. 9 is to be used to show based on determining set of symbols list based on the frame structure of 5G based on the frame structure in the 5th generation (5G) The schematic diagram of the method for member.
Figure 10 is the method for determining set of symbols unit based on communication environment of the exemplary embodiment of concept according to the present invention Flow chart.
Figure 11 is the schematic diagram of the signal operated for the symbol tracking modulator of Fig. 5.
Figure 12 is the circuit diagram of the symbol tracking modulator of the exemplary embodiment of concept according to the present invention.
Figure 13 is the schematic diagram of the signal operated for the symbol tracking modulator of Figure 11.
Figure 14 is the block diagram of the symbol tracking modulator of the exemplary embodiment of concept according to the present invention.
Figure 15 is first single inductance multi output (single-inductor multiple-output of Figure 14；SIMO) turn The circuit diagram of parallel operation.
Figure 16 and Figure 17 is the block diagram of the symbol tracking modulator of the exemplary embodiment of concept according to the present invention.
Figure 18 is the block diagram of the wireless communication device of the exemplary embodiment of concept according to the present invention.
Figure 19 is the block diagram of phased array antenna module according to the embodiment.
Figure 20 A and Figure 20 B are the schematic diagrams for showing the SPT according to the embodiment using SIDO and operating.
Figure 21 is two buck converters according to the embodiment comprising being configured to that pulsation is supported to inject sluggish control function PMIC block diagram.
Drawing reference numeral explanation
100: wireless communication device/symbol power tracks amplification system；
110: modem；
112: baseband processor；
114: symbol power tracing control module；
114a: the control module based on 5G frame structure；
114b: the control module based on communication environment；
130,200,300,300', 300 ", 400,420,500,600: symbol tracking modulator；
131,210,310,310', 310 ", 410,510,610: symbol power follow-up control circuit；
133: Voltage Supply Device；
135,240,340,340', 340 ", 440,540,640: switching circuit；
150: radio block；
170: power amplifier；
212,214: D/A converting circuit；
220: first voltage supply circuit；
230: second voltage supply circuit；
320,320', 320 ": the first DC-to-dc converter；
322,322', 322 ": the first conversion control circuit；
324,324', 324 ": first comparator；
330,330', 330 ": the second DC-to-dc converter；
332,332', 332 ": the second conversion control circuit；
334,334', 334 ": the second comparator；
350': quick charge control circuit；
420: the first single inductor multiple output converters；
422: single inductance multi output conversion control circuit；
424_1~424_n: comparator；
426_1~426_n: voltage generation circuit；
430: the second single inductor multiple output converters；
520: DC-to-dc converter；
530: linear amplifier；
620_1~620_m: voltage supply circuit；
1000: wireless communication device；
1010: specific integrated circuit；
1030: dedicated instruction set processor；
1050: memory；
1070: primary processor；
1090: main memory；
2000: phased array antenna module；
2100,3000: power management integrated circuit；
2110,2120: direct current-direct current electric transducer；
The volt linear leakage linear regulator of 2130:1.1；
2140,3300: aided linear leakage；
2150: fast charge/discharge current source；
2160: reference voltage generator；
2170: controller；
2172: Mobile Industry Processor Interface is from device；
2174: master controller；
2175: fast-charge controller；
2176: fixed frequency controller；
2178: internal clock source；
2180: multiplexer；
2200: phased array transceiver；
2210_a, 2210_b: transmission circuit；
2220: micro controller unit；
2230: Mobile Industry Processor Interface master device；
2240: inner linear leakage；
3100、BKSPT: the first buck converter；
3200、BKSIDO: the second buck converter；
Ants: antenna；
BUF: buffer；
C1~Cn、C1.1V、C1.3V、Cac1、Cac2、Cf1、Cf2、Cr1、Cr2、CL1、CL2: capacitor；
Ca、C”a、Cb、C”b: capacitor element；
Cap.Swap: switch control signal；
CLK: clock signal；
COMP: comparator；
CSPT: output capacitor element/output capacitor；
DAC Sel.: digital analog converter selection signal；
DAC1: the first digital analog converter；
DAC2: the second digital analog converter；
DATA: data；
DN: the second fast charge switch controls signal；
DPC1、DPC2、SWL1、SWL2、SWSD1、SWSD2、SWSIDO: switch；
Enables: enable signal；
FB: feedback block；
FFC1: the first fixed frequency controls signal；
FFC2: the second fixed frequency controls signal；
FSS1.3V、FSSC1、FSSC2: feedback selection switch；
FT_a, FT_b, FT_c, FT_d: filter；
GND: ground connection；
IF_CKT_a, IF_CKT_b: intermediate-frequency circuit；
Interface_CKTa, Interface_CKTb: interface circuit；
IS1: the first current source；
IS2: the second current source；
ITV1: the first subframe part；
ITV2: the second subframe part；
ITV3: third subframe part；
L: inductor；
La、Lb: inductor element；
LNA: low-noise amplifier；
LSIDO: single-inductance double-output inductor；
LSPT: symbol power tracks inductor；
LV1: the first level；
LV2: second electrical level；
LV3: third level；
MIX_a, MIX_b, MIX_c, MIX_d: mixer；
MN1、MN2、MP1、MP2、MP3: transistor；
Mode Sel.: mode select signal；
Na、Na1~Nan、Nb、NOUT: output node；
PA: power amplifier；
PS: phase-shifter；
PWLS1、PWLS2、PWLS3: signal；
RF_CKTs: radio circuit；
Rf1a、Rf1b、Rf1c、Rf1d、Rf2a、Rf2b、Rf2c、Rf2d: resistor；
RFIN: radiofrequency signal；
RFOUT: radio frequency output signal；
Rr1、Rr2: variable resistance；
S_SB1: the first symbol；
S_SB2: the second symbol；
S100, S120, S140: step；
SB_0: the first symbolic component/symbol；
SB_1: the second symbolic component/symbol；
SB_2: third symbolic component/symbol；
SB_3: the four symbolic components/symbol；
SB_4, SB_5, SB_6, SB_7: symbol；
SBG_0: the first set of symbols part；
SBG_1: the second set of symbols part；
SBG_2: third set of symbols part；
SBG_3: the four set of symbols part；
SP1: the first signal path；
SP2: second signal path；
SPT_CS1: first control signal；
SPT_CS2: second control signal；
SW_CS、SW_CSa1、SW_CSa2、SW_CSb1、SW_CSb2: switch control signal；
SW_CSa: first switch controls signal；
SW_CSb: second switch controls signal；
SWa、SWa1~SWan、SWb、SWb1、SWb2、SWc1、SWc2、SWc3、SWc4: switch element；
SWAP_EN: enable signal；
SWDN: the second quick charge control switch；
SWSIDO: single-inductance double-output switch；
SWUP: the first quick charge control switch；
t0、t1、t2、t3、t4、t5、t6、t7、t8、ta、t'a、t”a、tb、t'b、t”b、tc、t'c、t”c、td、t'd、t” D: time point；
Tick: timing signal；
Trigger_SPT, TICK: trigger signal；
TRX Swa, TRX SWb: transceiver switch；
TS_SPT: symbol tracking signal；
TS_SPT1: the first symbol tracking signal；
TS_SPT2: the second symbol tracking signal；
TX: data-signal；
1: the first uplink channel symbols of UL Symbol；
2: the second uplink channel symbols of UL Symbol；
UL Symbol 3: third uplink channel symbols；
UP: the first fast charge switch controls signal；
VAPT、VOUT1~VOUTm、VSPT、Vo1.3V: supply voltage；
VC1、VC2: load capacitor voltage；
VDD: supply voltage；
VL_CSa: first voltage-level controling signal；
VL_CSb: second voltage-level controling signal；
VOUTa: the first supply voltage；
VOUTa1~VOUTan: feedback signal；
VOUTb: second source voltage；
VREF1~VREFn: reference voltage；
VREFa: the first reference voltage；
VREFb: the second reference voltage；
Vsel: selection supply voltage.
Specific embodiment
Fig. 1 is the schematic block diagram of the wireless communication device 100 of the exemplary embodiment of concept according to the present invention.
With reference to Fig. 1, wireless communication device 100 may include modem 110, symbol tracking modulator 130, radio frequency (RF) Block 150 and power amplifier (or PA) 170.Configuration comprising symbol tracking modulator 130 and power amplifier 170 can be It is configured to amplification RF signal RFINAnd export RF output signal RFOUTSymbol power track (SPT) amplification system.Modem 110 can handle the baseband signal for being sent to wireless communication device 100 and the base band received from the wireless communication device 100 letter Number.For example, modem 110 may be in response to external data signal and generate digital data signal and correspond to the number The numerical chracter of digital data signal tracks signal.It in this case, can amplitude (or the amplitude point based on digital data signal Measure) signal is tracked to generate numerical chracter.Modem 110 can carry out digital data signal and numerical chracter tracking signal Digital-to-analogue conversion (digital-to-analog conversion；DAC) and by data-signal TX and symbol tracking signal TS_SPT It is respectively supplied to RF block 150 and symbol tracking modulator 130.However, being supplied to symbol tracking modulator by modem 110 130 symbol tracking signal TS_SPT is not limited to analog signal and can be digital signal.
Data-signal TX can correspond to predetermined frame and include multiple symbols.Frame is more fully described hereinafter with reference to Fig. 8.Root It can be incited somebody to action based on the set of symbols unit comprising at least one symbol according to the modem 110 of the exemplary embodiment of concept of the present invention Data-signal TX is divided into multiple set of symbols, and amplitude (or the amplitude point based on the symbol for including in each of set of symbols Amount) generate symbol tracking signal TS_SPT.For example, when set of symbols unit only includes a symbol, set of symbols unit It can be symbolic unit.Modem 110 can generate symbol based on the amplitude of each of the symbol of data-signal TX Track signal TS_SPT.Symbol tracking modulator 130 can will be used based on symbol tracking signal TS_SPT for each symbolic component In tracking RF signal RFINSupply voltage be supplied to power amplifier 170.In addition, modem 110 can will correspond to symbol The trigger signal Trigger_SPT of group unit is supplied to symbol tracking modulator 130.Trigger signal Trigger_SPT can be used To inform time point that the new set of symbols part of symbol tracking modulator 130 starts.For example, when set of symbols unit only includes When one symbol, trigger signal Trigger_SPT may be notified that each sign-on of 130 data-signal TX of symbol tracking modulator Time point.
Modem 110 can differently determine the number for the symbol for including in (or change) set of symbols unit, and generate Symbol tracking signal TS_SPT and trigger signal Trigger_SPT corresponding to set of symbols unit.Hereinafter with reference to Fig. 7 to Fig. 9 The method for describing to determine the set of symbols unit of modem 110.
It can implement symbol tracking signal TS_SPT and trigger signal Trigger_SPT differently to control symbol tracking modulation Device 130, will be used to track RF signal RF for each set of symbols part corresponding to set of symbols unitINSelection supply voltage Vsel is supplied to power amplifier 170.Symbol tracking modulator 130 can be based on symbol tracking signal TS_SPT and trigger signal Trigger_SPT carries out SPT operation.For example, SPT operation can be based on for each set of symbols corresponding to set of symbols unit The amplitude of the maximum symbol of data-signal TX selects the voltage level of supply voltage Vsel to modulate.
Symbol tracking modulator 130 can be modulated based on symbol tracking signal TS_SPT and be supplied to power amplifier 170 Select the voltage level of supply voltage Vsel.For example, symbol tracking modulator 130 may include SPT control circuit 131, electricity Press power supply unit 133 and switching circuit 135.In the exemplary embodiment of concept of the present invention, SPT control circuit 131 can be based on The symbol tracking signal TS_SPT and trigger signal Trigger_SPT received from modem 110 is by first control signal SPT_CS1 and second control signal SPT_CS2 are respectively supplied to Voltage Supply Device 133 and switching circuit 135.
Supply voltage V can be used in Voltage Supply Device 133DD(or cell voltage) is produced based on first control signal SPT_CS1 Raw at least two supply voltages.The voltage level of each of supply voltage may be in response to first control signal SPT_CS1 and Change, and the voltage level of respective voltage supplies can change in distinct symbols group part.Voltage Supply Device 133 may include configuration At multiple output terminals of output supply voltage respectively, and the output terminal of Voltage Supply Device 133 may be connected to switching circuit 135。
Switching circuit 135 may include multiple switch element, and is directed to based on second control signal SPT_CS2 and corresponds to symbol Each set of symbols part of group unit selects any of the supply voltage generated by Voltage Supply Device 133.For example, when When set of symbols unit only includes a symbol, switching circuit 135 can carry out in selection supply voltage for each symbolic component The switch operation of any one.Voltage Supply Device 133 can change to remove based on first control signal SPT_CS1 to be selected by switching circuit 135 The voltage level of remaining supply voltage other than the supply voltage selected.
RF block 150 can carry out up conversion to data-signal TX and generate RF signal RFIN.Power amplifier 170 can be because of selection Supply voltage Vsel and drive, amplify RF signal RFINAnd generate RF output signal RFOUT.It can be by RF output signal RFOUTIt provides To antenna.As described above, selection supply voltage Vsel can have the data-signal TX in the unit for tracking symbol group Or RF signal RFINVoltage-level transition mode.
The symbol tracking modulator 130 of the exemplary embodiment of concept can carry out SPT operation and carry out function according to the present invention The amplifying operation of rate amplifier 170 is to minimize RF signal RFINSignal pattern deformation.In other words, power amplifier 170 Selection supply voltage Vsel output can be used directly to reflect RF signal RFINSignal pattern RF output signal RFOUT, thus mention Communication performance between high wireless communication device 100 and base station.
Fig. 2A and Fig. 2 B is the schematic diagram for showing mean power tracking technique.It will hereinafter be assumed that long term evolution (LTE) system The frame of the data-signal of system includes ten subframes, and a subframe includes two time slots, and a time slot includes seven symbols.
With reference to Fig. 2A, mean power tracking technique can based on the data-signal of each subframe part highest amplitude (or vibration Width) carry out modulation power source voltage VAPTVoltage level.Fig. 2 B is painted according to mean power tracking technique and the corresponding to Fig. 2A The RF signal RF of each of one subframe part ITV1, the second subframe part ITV2 and third subframe part ITV3INIt is related Supply voltage VAPT.RF signal RF with reference to Fig. 2 B, in the second subframe part ITV2INThe first symbol S_SB1 can with third son RF signal RF in the ITV3 of frame partINThe second symbol S_SB2 there is same magnitude, and corresponding to the second subframe part ITV2 Supply voltage VAPTLevel may differ from the supply voltage V corresponding to third subframe part ITV3APTLevel.Due to practical function The gain amplifier of rate amplifier can be according to supply voltage VAPTLevel and change, so in the first symbol S_SB1 after amplifying It may differ from being exported after amplifying by power amplifier in the second symbol S_SB2 by the amplitude of the signal of power amplifier output Signal amplitude.In other words, as the supply voltage V that will have varying levelAPTWhen being supplied to power amplifier, even if phase The gain amplifier that same symbol can also be different generates Different Results through amplifying.Therefore, communication reliability may be decreased.It is specific For, in the 5th generation (5G) system, the communication of symbolic unit can be the precondition of high frequency bandwidth high speed data communication. Therefore, the power tracking modulation technique with high data accuracy can be used to replace mean power to track modulation technique.Such as figure Depicted in 2A, subframe can be 1 millisecond, and time slot can be 0.5 millisecond and symbol can be 71 microseconds.In addition, symbol can wrap Containing cyclic prefix.
Fig. 3 A and Fig. 3 B are the schematic diagrams for showing the SPT modulation technique of the exemplary embodiment of concept according to the present invention.
With reference to Fig. 3 A, modem 110 and the symbol tracking modulator 130 of Fig. 1 can be used to implement according to the present invention The SPT modulation technique of the exemplary embodiment of concept, and can data by using SPT modulation technique based on each symbolic component The amplitude (or amplitude) of signal carrys out modulation power source voltage VSPTVoltage level.It can be in the cyclic prefix (cyclic of symbol prefix；CP supply voltage V) is carried out in partSPTLevel transition.However, the embodiment being painted in Fig. 3 A can be related to set of symbols The case where unit only includes a symbol.It, can be based on including each of multiple symbols when set of symbols unit includes multiple symbols The highest amplitude of the data-signal of set of symbols part carrys out modulation power source voltage VSPTVoltage level.
With reference to Fig. 3 B, RF signal RF that the symbol tracking modulator 130 of Fig. 1 can will be used in tracking symbol unitINElectricity Source voltage VSPTIt is supplied to power amplifier 170.Therefore, according to the present invention the exemplary embodiment of concept include symbol tracking The SPT amplification system of modulator 130 and power amplifier 170 can RF signal RF in the unit of accurate amplification symbols unitINAnd Output is through amplified signal.Therefore, the performance with base station communication can be improved.
Fig. 4 A and Fig. 4 B are the block diagrams of the symbol tracking modulator 200 of the exemplary embodiment of concept according to the present invention.
With reference to Fig. 4 A, symbol tracking modulator 200 may include SPT control circuit 210, first voltage supply circuit 220, Two voltage supply circuits 230 and switching circuit 240.SPT control circuit 210 can receive symbol tracking signal from modem TS_SPT and trigger signal Trigger_SPT.SPT control circuit 210 can generate the first electricity based on symbol tracking signal TS_SPT The flat control signal VL_CS of piezo-electricaWith second voltage-level controling signal VL_CSb, and by first voltage-level controling signal VL_CSaWith second voltage-level controling signal VL_CSbIt is respectively supplied to first voltage supply circuit 220 and second voltage supply Circuit 230.In addition, SPT control circuit 210 can be generated switch control signal SW_CS based on trigger signal Trigger_SPT and will Switch control signal SW_CS is supplied to switching circuit 240.SPT control circuit 210 can further include timer.When SPT is controlled Circuit 210 receive trigger signal Trigger_SPT it is primary after receive about including in set of symbols unit from modem Symbol number additional information when, SPT control circuit 210 can be used timer to correspond to set of symbols unit it is lasting when Between count and periodically generate switch control signal SW_CS based on count results.
First voltage supply circuit 220 can be based on first voltage-level controling signal VL_CSaGenerate the first supply voltage VOUTa, and second voltage supply circuit 230 can be based on second voltage-level controling signal VL_CSbGenerate second source voltage VOUTb.Switching circuit 240 can alternately select the first voltage of each set of symbols part to supply based on switch control signal SW_CS Circuit 220 and second voltage supply circuit 230, and chosen voltage supply circuit is connected to power amplifier PA.First electricity Press supply circuit 220 can be based on first voltage-level in the wherein seleced set of symbols part of first voltage supply circuit 220 Control signal VL_CSaTo change the first supply voltage VOUTaLevel.In addition, second voltage supply circuit 230 can be based on wherein Second voltage-level controling signal VL_CS in the seleced set of symbols part of second voltage supply circuit 230bTo change Two supply voltage VOUTbLevel.By using the above method, switching circuit 240 can will modulate the selection power supply generated by SPT Voltage Vsel is supplied to power amplifier PA.
With reference to Fig. 4 B, the symbol tracking signal TS_SPT of Fig. 4 A may include the first symbol tracking signal TS_SPT1 and second Symbol tracking signal TS_SPT2.First symbol tracking signal TS_SPT1 can control the first supply voltage VOUTaLevel, and Two symbol tracking signal TS_SPT2 can control second source voltage VOUTbLevel.In the exemplary embodiment of concept of the present invention In, SPT control circuit 210 may include DAC circuit 212 and DAC circuit 214.The symbol of first symbol tracking signal TS_SPT1 and second Number tracking signal TS_SPT2 first voltage-level controling signal VL_ can be converted by DAC circuit 212 and DAC circuit 214 respectively CSaWith second voltage-level controling signal VL_CSb.However, in the exemplary embodiment of concept of the present invention, when the first symbol When tracking signal TS_SPT1 and the second symbol tracking signal TS_SPT2 is analog signal, the first symbol tracking signal TS_SPT1 With the second symbol tracking signal TS_SPT2 can be respectively with first voltage-level controling signal VL_CSaWith second voltage-electricity Flat control signal VL_CSbIdentical signal.
SPT control circuit 210 can receive the first symbol tracking signal TS_SPT1 via the first signal path SP1 and by the One symbol tracking signal TS_SPT1 is routed to first voltage supply circuit 220.In addition, SPT control circuit 210 can be via second Signal path SP2 receives the second symbol tracking signal TS_SPT2 and the second symbol tracking signal TS_SPT2 is routed to the second electricity Press supply circuit 230.
The the first symbol tracking signal TS_SPT1 and the second symbol tracking signal TS_ for implementing SPT modulation technique will now be described Relationship between SPT2.The time point that the level of first symbol tracking signal TS_SPT1 changes may differ from the second symbol tracking The time point that the level of signal TS_SPT2 changes.In addition, the time point that the level of the first symbol tracking signal TS_SPT1 changes The time interval between time point changed with the level of the second symbol tracking signal TS_SPT2 can correspond to set of symbols unit Length.In other words, modem can will be more via multiple signal paths (such as signal path SP1 and signal path SP2) A symbol tracking signal (such as symbol tracking signal TS_SPT1 and symbol tracking signal TS_SPT2) is supplied to symbol tracking tune Device 200 processed.
Fig. 5 is the circuit diagram of the symbol tracking modulator 300 of the exemplary embodiment of concept according to the present invention.
With reference to Fig. 5, symbol tracking modulator 300 may include SPT control circuit 310, the first direct current (direct current；DC)-DC converter 320, the second DC-DC converter 330, switching circuit 340 and output capacitor element CSPT。 First DC-DC converter 320 and the second DC-DC converter 330 can support dynamic voltage scaling (dynamic voltage scaling；DVS) function.First DC-DC converter 320 may include the first conversion control circuit 322, first comparator 324, more A switch element (such as switch element SWc1With switch element SWc2), inductor element LaAnd capacitor element Ca.2nd DC- DC converter 330 may include the second conversion control circuit 332, the second comparator 334, multiple switch element (such as switch element SWc3With switch element SWc4), inductor element LbAnd capacitor element Cb。
SPT control circuit 310 can be based on symbol tracking signal TS_SPT respectively by the first reference voltage VREFaWith the second ginseng Examine voltage VREFbIt is supplied to first comparator 324 and the second comparator 334.First comparator 324 can receive the first DC-DC conversion The output node N of device 320aThe first supply voltage VOUTa, compare the first reference voltage VREFaWith the first supply voltage VOUTa, and Comparison result is supplied to the first conversion control circuit 322.First conversion control circuit 322 can control switch based on comparative result Element SWc1With switch element SWc2Switch operation, and the first DC-DC converter 320 can produce corresponding to the first reference voltage VREFaThe first supply voltage VOUTa.Second comparator 334 can receive the output node N of the second DC-DC converter 330bSecond Supply voltage VOUTb, compare the second reference voltage VREFbWith second source voltage VOUTb, and comparison result is supplied to the second conversion Control circuit 332.Second conversion control circuit 332 can be controlled based on comparative result to switch element SWc3With switch element SWc4 Switch operation, and the second DC-DC converter 330 can produce corresponding to the second reference voltage VREFbSecond source voltage VOUTb。
Switching circuit 340 may include multiple switch element (such as switch element SWaWith switch element SWb).Switching circuit 340 first switching element SWaIt is attached to the output node of the first DC-DC converter 320 and symbol tracking modulator 300 NOUTBetween (or output terminal).The second switch element SW of switching circuit 340bBe attached to the second DC-DC converter 330 with The output node N of symbol tracking modulator 300OUTBetween.SPT control circuit 310 can be produced based on trigger signal Trigger_SPT Raw first switch controls signal SW_CSaSignal SW_CS is controlled with second switchb, and first switch is controlled into signal SW_CSaWith Second switch controls signal SW_CSbIt is provided respectively to first switching element SWaWith second switch element SWb.Switching circuit 340 can Based on switch control signal SW_CSaWith switch control signal SW_CSbAlternately select the first supply voltage VOUTaAnd second source Voltage VOUTb, and via output node NOUTSelection supply voltage Vsel is supplied to power amplifier PA.Output capacitor element CSPTIt may be connected to output node NOUTTo prevent the unexpected voltage blanking during the switch operation using switching circuit 340.
Fig. 6 is the schematic diagram of the signal operated for the symbol tracking modulator 300 of Fig. 5.It will hereinafter be assumed that symbol Group unit only includes a symbol.It indicates to be grounded by GND in figure.
With reference to Fig. 5 and Fig. 6, in the first symbolic component SB_0 (or part between time point " t0 " and time point " t1 ") In, SPT control circuit 310 can will be maintained at the first reference voltage V in constant level based on symbol tracking signal TS_SPTREFa It is supplied to the first DC-DC converter 320, is based on there be height in the trigger signal Trigger_SPT that time point " t0 " receives The first switch of level controls signal SW_CSaIt is supplied to first switching element SWa, and will be generated by the first DC-DC converter 320 The first supply voltage VOUTaAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In the first symbolic component SB_0, SPT control circuit 310 can be based on the second reference voltage that symbol tracking signal TS_SPT changes level at time point " ta " VREFbIt is supplied to the second DC-DC converter 330, is based on to have in the trigger signal Trigger_SPT that time point " t0 " receives There is low level second switch control signal SW_CSbIt is supplied to second switch element SWb, and change by the second DC-DC converter The 330 second source voltage V generatedOUTbLevel.For example, it is possible to increase second source voltage VOUTbLevel.
In the second symbolic component SB_1 (or part between time point " t1 " and time point " t2 "), SPT control circuit 310 can will be maintained at the second reference voltage V in constant level based on symbol tracking signal TS_SPTREFbIt is supplied to the 2nd DC- DC converter 330, based on the trigger signal Trigger_SPT received at time point " t1 " by the second switch with high level Control signal SW_CSbIt is supplied to second switch element SWb, and the second source voltage that will be generated by the second DC-DC converter 330 VOUTbAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In the second symbolic component SB_1, SPT control circuit 310 It can be based on the first reference voltage V that symbol tracking signal TS_SPT changes level at time point " tb "REFaIt is supplied to the first DC- DC converter 320 is based on having low level first switch in the trigger signal Trigger_SPT that time point " t1 " receives Control signal SW_CSaIt is supplied to first switching element SWa, and change the first power supply electricity generated by the first DC-DC converter 320 Press VOUTaLevel.For example, it is possible to increase the first supply voltage VOUTaLevel.
In third symbolic component SB_2 (or part between time point " t2 " and time point " t3 "), SPT control circuit 310 can will be maintained at the first reference voltage V in constant level based on symbol tracking signal TS_SPTREFaIt is supplied to the first DC- DC converter 320, based on the trigger signal Trigger_SPT received at time point " t2 " by the first switch with high level Control signal SW_CSaIt is supplied to first switching element SWa, and the first supply voltage that will be generated by the first DC-DC converter 320 VOUTaAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In third symbolic component SB_2, SPT control circuit 310 It can be based on the second reference voltage V that symbol tracking signal TS_SPT changes level at time point " tc "REFbIt is supplied to the 2nd DC- DC converter 330 is based on having low level second switch in the trigger signal Trigger_SPT that time point " t2 " receives Control signal SW_CSbIt is supplied to second switch element SWb, and change the second source electricity generated by the second DC-DC converter 330 Press VOUTbLevel.For example, it is possible to increase second source voltage VOUTbLevel.
In the 4th symbolic component SB_3 (or part between time point " t3 " and time point " t4 "), SPT control circuit 310 can will be maintained at the second reference voltage V in constant level based on symbol tracking signal TS_SPTREFbIt is supplied to the 2nd DC- DC converter 330, based on the trigger signal Trigger_SPT received at time point " t3 " by the second switch with high level Control signal SW_CSbIt is supplied to second switch element SWb, and the second source voltage that will be generated by the second DC-DC converter 330 VOUTbAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In the 4th symbolic component SB_3, SPT control circuit 310 It can be based on the first reference voltage V that symbol tracking signal TS_SPT changes level at time point " td "REFaIt is supplied to the first DC- DC converter 320 is based on having low level first switch in the trigger signal Trigger_SPT that time point " t3 " receives Control signal SW_CSaIt is supplied to first switching element SWa, and change the first power supply electricity generated by the first DC-DC converter 320 Press VOUTaLevel.For example, the first supply voltage V can be reducedOUTaLevel.
In the above-mentioned methods, symbol tracking modulator 300 alternately selects the first supply voltage VOUTaAnd second source Voltage VOUTbSelection supply voltage V as each symbolic componentSPT, and the pre- voltage level for changing not chosen supply voltage To carry out SPT modulation operations.
Fig. 7 A is the circuit diagram of the symbol tracking modulator 300' according to the embodiment for capableing of quick charge control, and Fig. 7 B It is the block diagram for showing the operation for the quick charge control circuit 350' for being configured to carry out quick charge control.
With reference to Fig. 7 A, symbol tracking modulator 300 compared to Fig. 5, symbol tracking modulator 300' be can further include First current source IS1, the second current source IS2, the first quick charge control switch SWUPAnd the second quick charge control switch SWDN.In embodiment, the first current source IS1First switching element SW can connectedaOr second switch element SWbBefore to output Node NOUTQuick charge is carried out, so that output node NOUTVoltage VSPTIt can reach in advance close to the first DC-DC converter 320' Output node NaThe first supply voltage VOUTaOr second DC-DC converter 330' output node NbSecond source voltage VOUTb.Second current source IS2First switching element SW can connectedaOr second switch element SWbBefore to output node NOUTInto Row repid discharge, so that output node NOUTVoltage VSPTThe output section close to the first DC-DC converter 320' can be reached in advance Point NaThe first supply voltage VOUTaOr second DC-DC converter 330' output node NbSecond source voltage VOUTb.It can incite somebody to action Use the first current source IS1With the second current source IS2To output node NOUTThe control charged and discharged is defined as quickly filling Electric control.That is, due to the first current source IS1, the second current source IS2, the first quick charge control switch SWUPAnd Second quick charge control switch SWDNConfiguration, output node NOUTVoltage VSPTIt can be rapidly achieved close to the first supply voltage VOUTaOr second source voltage VOUTb.Therefore, output node N can be reducedOUTVoltage VSPTTransit to that target voltage spent when Between.In addition, as connection first switching element SWaWith second switch element SWbWhen, it can prevent because of output node NOUTWith other outputs Node NaWith output node NbBetween larger voltage difference and the dash current that occurs.
With reference to Fig. 7 B, symbol tracking modulator 300 compared to Fig. 5, symbol tracking modulator 300' be can further include Quick charge control circuit 350'.Quick charge control circuit 350' may be in response to the triggering of the transition for trigger symbol power Signal TICK is based on target voltage (for example, the first supply voltage VOUTaOr second source voltage VOUTb) and output node NOUTElectricity Press VSPTBetween difference come generate the first fast charge switch control signal UP and the second fast charge switch control signal DN in Any one, and produced signal is output to the first quick charge control switch SWUPWith the second quick charge control switch SWDN Any of.In addition, quick charge control circuit 350' can detect output node NOUTVoltage VSPTWhether charge or has put Electricity is arrived close to target voltage.When detecting output node NOUTVoltage VSPTWhen close to target voltage, quick charge control circuit Enable signal SWAP_EN can be supplied to SPT control circuit 310' by 350', so that SPT control circuit 310' can produce for controlling First switching element SW processedaOr second switch element SWbOn/off operation switch control signal SW_CSaBelieve with switch control Number SW_CSb。
The configuration for quick charge control being painted in Fig. 7 A and Fig. 7 B is only example embodiment, and concept of the present invention It is without being limited thereto.It can be used for the rapid transition of tracking symbol power and the voltage V that pre- impulse-current-proof occurs simultaneouslySPTVarious match It sets and can be applied to embodiment.Fig. 8 is the block diagram of the modem 110 of the exemplary embodiment of concept according to the present invention.In order to SPT control circuit 131 depicted in control figure 1 can implement modem 110 as depicted in Fig. 8.
With reference to Fig. 8, modem 110 may include baseband processor 112 and SPT control module 114.SPT control module 114 can be the software executed by baseband processor 112 and be stored in the predetermined memory region of modem 110.This Outside, SPT control module 114 is implementable is hardware and independently controls SPT modulation operations with baseband processor 112.
In the exemplary embodiment of concept of the present invention, SPT control module 114 may include the control mould based on 5G frame structure Block 114a and control module 114b based on communication environment.The control module based on 5G frame structure can be performed in baseband processor 112 114a, determines the number for the symbol for including in (or change) set of symbols unit based on the frame structure of 5G system, and based on determining Set of symbols unit generate symbol tracking signal and trigger signal.In addition, baseband processor 112 is executable based on communication environment Control module 114b is determined based at least one of parameter of communication environment between base station and wireless communication device is indicated The number for the symbol for including in (or change) set of symbols unit, and symbol tracking signal is generated based on identified set of symbols unit And trigger signal.In other words, baseband processor 112 can be used control module 114a based on 5G frame structure or be based on communication loop The control module 114b in border generates symbol tracking signal TS_SPT and trigger signal Trigger_SPT.
However, concept of the present invention is without being limited thereto.For example, baseband processor 112 can be based on various parameters periodically Differently reindexing group unit.
Fig. 9 is the schematic diagram of the frame structure based on 5G, and the schematic diagram, which can be used to show, determines symbol based on the frame structure based on 5G The method of number group unit.Figure 10 is that the exemplary embodiment of concept based on communication environment determines set of symbols unit according to the present invention Method flow chart.
With reference to Fig. 9, a subframe (or radio frames) may include multiple time slots.For example, a subframe may include 10 Time slot (time slot 0 arrives time slot 9).One time slot may include multiple symbols.For example, a time slot may include seven symbols.It lifts For example, time slot 0 may include that seven symbols 0 arrive symbol 6.However, concept of the present invention is without being limited thereto.For example, according to 5G without Unit interval (in other words, subcarrier spacing size) between the subcarrier of line communication, a time slot may include difference The symbol of number.In addition, at least one symbol for including in a time slot can be divided into mini-slot, and mini-slot can be and be based on One unit of the low delay communication of 5G.For example, mini-slot may include such as two symbols 0 and symbol depicted in Fig. 8 1.The baseband processor 112 of Fig. 8 can determine (or change) set of symbols unit according to the number for the symbol for including in mini-slot.
With reference to Figure 10, the baseband processor 112 of Fig. 8 can be obtained based at least one of parameter of instruction communication environment Communication environment information (step S100).In the exemplary embodiment of concept of the present invention, indicate that the parameter of communication environment can indicate Channel status between base station and wireless communication device.For example, indicate that the parameter of communication environment can be indicated with channel quality It is associated.In addition, baseband processor 112 can obtain communication environment based on the system information and control information that receive from base station Information.Baseband processor 112 can be determined based on communication environment information obtained in (or change) set of symbols unit The number (step S120) of symbol.Baseband processor 112 can control SPT modulation operations (step based on identified set of symbols unit Rapid S140).
Figure 11 is the flow chart of the signal operated for the symbol tracking modulator 300 of Fig. 5.It is false different from Fig. 6 Being scheduled on set of symbols unit in Figure 11 includes two symbols.For example, the first set of symbols part SBG_0 includes symbol SB _ 0 and symbol Number SB_1, the second set of symbols part SBG_1 include symbol SB _ 2 and symbol SB _ 3, and third set of symbols part SBG_2 includes symbol SB_4 and symbol SB _ 5, and the 4th set of symbols part SBG_3 includes symbol SB _ 6 and symbol SB _ 7.
With reference to Fig. 5 and Figure 11, in the first set of symbols part SBG_0 (part between time point " t0 " and time point " t2 ") In, SPT control circuit 310 can will be maintained at the first reference voltage V in constant level based on symbol tracking signal TS_SPTREFa It is supplied to the first DC-DC converter 320, is based on there be height in the trigger signal Trigger_SPT that time point " t0 " receives The first switch of level controls signal SW_CSaIt is supplied to first switching element SWa, and will be generated by the first DC-DC converter 320 The first supply voltage VOUTaAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In the first set of symbols part SBG_0 In, the second reference that SPT control circuit 310 can be changed level at time point " t'a " based on symbol tracking signal TS_SPT is electric Press VREFbIt is supplied to the second DC-DC converter 330, it will based on the trigger signal Trigger_SPT received at time point " t0 " Signal SW_CS is controlled with low level second switchbIt is supplied to second switch element SWb, and change and converted by the 2nd DC-DC The second source voltage V that device 330 generatesOUTbLevel.For example, it is possible to increase second source voltage VOUTbLevel.
In the second set of symbols part SBG_1 (part between time point " t2 " and time point " t4 "), SPT control circuit 310 can will be maintained at the second reference voltage V in constant level based on symbol tracking signal TS_SPTREFbIt is supplied to the 2nd DC- DC converter 330, based on the trigger signal Trigger_SPT received at time point " t2 " by the second switch with high level Control signal SW_CSbIt is supplied to second switch element SWb, and the second source voltage that will be generated by the second DC-DC converter 330 VOUTbAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In the second set of symbols part SBG_1, SPT control circuit 310 can be based on the first reference voltage V that symbol tracking signal TS_SPT changes level at time point " t'b "REFaIt is supplied to One DC-DC converter 320, based on will have low level the in the trigger signal Trigger_SPT that time point " t2 " receives One switch control signal SW_CSaIt is supplied to first switching element SWa, and change first generated by the first DC-DC converter 320 Supply voltage VOUTaLevel.For example, it is possible to increase the first supply voltage VOUTaLevel.
Due to the third symbol portion of third set of symbols part SBG_2 and the 4th set of symbols part SBG_3 and Fig. 6 described above Divide SB_2 and the 4th symbolic component SB_3 roughly the same, so most of descriptions thereof will be omitted.
As depicted in Figure 11, in third set of symbols part SBG_2, SPT control circuit 310 can be believed based on symbol tracking The second reference voltage V that number TS_SPT changes level at time point " t'c "REFbIt is supplied to the second DC-DC converter 330, it will Signal SW_CS is controlled with low level second switchbIt is supplied to second switch element SWb, and change and converted by the 2nd DC-DC The second source voltage V that device 330 generatesOUTbLevel.In the 4th set of symbols part SBG_3, SPT control circuit 310 can base In the first reference voltage V that symbol tracking signal TS_SPT changes level at time point " t'd "REFaIt is supplied to the first DC-DC Converter 320 will have low level first switch control signal SW_CSaIt is supplied to first switching element SWa, and change by the The first supply voltage V that one DC-DC converter 320 generatesOUTaLevel.
Figure 12 is the circuit diagram of the symbol tracking modulator 300 " of the exemplary embodiment of concept according to the present invention.
With reference to Figure 12, symbol tracking modulator 300 " may include SPT control circuit 310 ", the first DC-DC converter 320 ", Second DC-DC converter 330 ", switching circuit 340 " and output capacitor element CSPT.First DC-DC converter 320 " and Two DC-DC converters 330 " can support dynamic voltage scaling (DVS) function.First DC-DC converter 320 " may include first turn Change control circuit 322 ", first comparator 324 ", multiple switch element (such as switch element SWc1With switch element SWc2), electricity Sensor component LaAnd capacitor element C "a.Second DC-DC converter 330 " may include the second conversion control circuit 332 ", second Comparator 334 ", multiple switch element (such as switch element SWc3With switch element SWc4), inductor element LbAnd capacitor Element C "b.Switching circuit 340 " may include multiple switch element (for example, switch element SWa1, switch element SWa2, switch element SWb1And switch element SWb2)。
The switching circuit 340 " of Figure 12 can be configured from the switching circuit 340 of Fig. 5 with different connections.In concept of the present invention In exemplary embodiment, first switching element SWa1With second switch element SWa2It can be serially connected, and third switch element SWb1With the 4th switch element SWb2It can be serially connected.In addition, first switching element SWa1With second switch element SWa2It can be with Third switch element SWb1With the 4th switch element SWb2It is connected in parallel.SPT control circuit 310 " can be based on trigger signal Trigger_SPT generates multiple switch and controls signal SW_CSa1, switch control signal SW_CSa2, switch control signal SW_CSb1 And switch control signal SW_CSb2, and multiple switch is controlled into signal SW_CSa1, switch control signal SW_CSa2, switch control Signal SW_CS processedb1And switch control signal SW_CSb2It is supplied to switching circuit 340 ".Due to symbol tracking modulator 300 " Operation be similar to above with reference to described in Fig. 5 operate, so descriptions thereof will be omitted.
Figure 13 is the flow chart of the signal operated for the symbol tracking modulator 300 " of Figure 12.It hereinafter, will be false Determining set of symbols unit only includes a symbol.
With reference to Figure 12 and Figure 13, in the first symbolic component SB_0 (part between time point " t0 " and time point " t1 ") In, SPT control circuit 310 " can will be maintained at the first reference voltage in constant level based on symbol tracking signal TS_SPT VREFaIt is supplied to the first DC-DC converter 320 ", is based on to have in the trigger signal Trigger_SPT that time point " t0 " receives There is the first switch control signal SW_CS of high levela1It is supplied to first switching element SWa1, will have low level second switch Control signal SW_CSa2It is supplied to second switch element SWa2, and the first power supply that will be generated by the first DC-DC converter 320 " Voltage VOUTaAlternatively supply voltage VSPTIt is supplied to power amplifier PA.In the first symbolic component SB_0, SPT control electricity Road 310 " can based on symbol tracking signal TS_SPT by level in time point " t " a " change the second reference voltage VREFbIt is supplied to Second DC-DC converter 330 ", it is low level based on that will have in the trigger signal Trigger_SPT that time point " t0 " receives Third switch control signal SW_CSb1It is supplied to third switch element SWb1, will be in time point " t " a " and from low level it is changed to height 4th switch control signal SW_CS of levelb2It is supplied to the 4th switch element SWb2, and change by the second DC-DC converter 330 " the second source voltage V generatedOUTbLevel.For example, it is possible to increase second source voltage VOUTbLevel.
In the second symbolic component SB_1 (part between time point " t1 " and time point " t2 "), SPT control circuit 310 " can be based on the first reference voltage V that symbol tracking signal TS_SPT changes level at time point " t1 "REFaIt is supplied to One DC-DC converter 320 ", based on will have low level the in the trigger signal Trigger_SPT that time point " t1 " receives One switch control signal SW_CSa1It is supplied to first switching element SWa1, will be in time point " t " b " and from low level it is changed to high electricity Flat second switch controls signal SW_CSa2It is supplied to second switch element SWa2, and change by the first DC-DC converter 320 " The the first supply voltage V generatedOUTaLevel.For example, it is possible to increase the first supply voltage VOUTaLevel.In the second symbol In the SB_1 of part, SPT control circuit 310 " can based on symbol tracking signal TS_SPT by level in time point " t " b " change the Two reference voltage VREFbIt is supplied to the second DC-DC converter 330 ", based on the trigger signal received at time point " t1 " Trigger_SPT is by the third switch control signal SW_CS with high levelb1It is supplied to third switch element SWb1, will have Low level 4th switch control signal SW_CSb2It is supplied to the 4th switch element SWb2, and will be by the second DC-DC converter 330 " the second source voltage V generatedOUTbAlternatively supply voltage VSPTIt is supplied to power amplifier PA.
Due to the third symbolic component SB_2 of third symbolic component SB_2 and the 4th symbolic component SB_3 and Fig. 6 described above It is roughly the same with the 4th symbolic component SB_3, so most of descriptions thereof will be omitted.
As depicted in Figure 13, in third symbolic component SB_2, SPT control circuit 310 " can be by level at time point The second reference voltage V that " t " c " changesREFbIt is supplied to the second DC-DC converter 330 ".In the 4th symbolic component SB_3, SPT Control circuit 310 " can be by level in time point " t " d " change the second reference voltage VREFbIt is supplied to the second DC-DC converter 330”。
Figure 14 is the block diagram of the symbol tracking modulator 400 of the exemplary embodiment of concept according to the present invention, and Figure 15 is The circuit diagram of single inductance multi output (SIMO) converter of the first of Figure 14.
With reference to Figure 14, symbol tracking modulator 400 may include SPT control circuit 410, the first SIMO converter 420, second SIMO converter 430 and switching circuit 440.With reference to Figure 15, the first SIMO converter 420 may include SIMO conversion control circuit 422, multiple comparator 424_1 to comparator 424_n, multiple voltage generation circuit 426_1 to voltage generation circuit 426_n, electricity Sensor L and switch element SWc1With switch element SWc2.First SIMO converter 420 can produce with the multiple of varying level Voltage and corresponding output node N via voltage generation circuit 426_1 to voltage generation circuit 426_na1To output node NanCome Export multiple voltages.
Voltage generation circuit 426_1 can separately include switch element SW to voltage generation circuit 426_na1To switch element SWanAnd capacitor C1To capacitor Cn.In the exemplary embodiment of concept of the present invention, voltage generation circuit 426_1 to electricity Pressing generation circuit 426_n may include the capacitor for being respectively provided with different capacitors and different loads.Comparator 424_1 is to comparator 424_n can receive reference voltage V respectivelyREF1To reference voltage VREFn, and generated from voltage generation circuit 426_1 to voltage respectively The output node N of circuit 426_na1To output node NanReceive feedback signal VOUTa1To feedback signal VOUTan, generate control letter Number, and supply control signals to SIMO conversion control circuit 422.
In the exemplary embodiment of concept of the present invention, SIMO conversion control circuit 422 can be based on first voltage-level control Signal VL_CS processedaIt generates and is used for control switch element SWa1To switch element SWanOn/off operation switch control signal, will Switch control signal is supplied to switch element SWa1To switch element SWan, and change the generated by the first SIMO converter 420 One supply voltage VOUTaLevel.In other words, the first SIMO converter 420 for not supporting DVS function can be used to execute root According to the SPT modulation operations of the exemplary embodiment of concept of the present invention.
Referring back to Figure 14, SPT control circuit 410 can generate switch control signal based on trigger signal Trigger_SPT Switch control signal SW_CS is supplied to switching circuit 440 by SW_CS, and alternately selects the of the first SIMO converter 420 One supply voltage VOUTaWith the second source voltage V of the 2nd SIMO converter 430OUTb.Referred to Fig. 4 A describe in detail symbol with Other operations of track modulator 420, and therefore will omit descriptions thereof.
Figure 16 and Figure 17 is the block diagram of the symbol tracking modulator of the exemplary embodiment of concept according to the present invention.
With reference to Figure 16, symbol tracking modulator 500 may include SPT control circuit 510, DC-DC converter 520, linearly put Big device 530 and switching circuit 540.In other words, the first voltage supply circuit 220 and second voltage supply circuit of Fig. 4 A 230 it is implementable be different types of circuit, and any in first voltage supply circuit 220 and second voltage supply circuit 230 It is a implementable for linear amplifier 530.
With reference to Figure 17, compared with the symbol tracking modulator 200 of Fig. 4 A, symbol tracking modulator 600 may include a large amount of Voltage supply circuit 620_1 to voltage supply circuit 620_m.SPT control circuit 610 can be based on trigger signal Trigger_SPT Successively select the supply voltage V generated by voltage supply circuit 620_1 to voltage supply circuit 620_mOUT1To supply voltage VOUTm Alternatively supply voltage Vsel, and the level based on the not chosen supply voltage of symbol tracking signal TS_SPT change.
It is retouched in detail since the operation of symbol tracking modulator 500 and symbol tracking modulator 600 corresponds to reference to Fig. 4 A The symbol tracking modulator 400 stated, so descriptions thereof will be omitted.
Figure 18 is the block diagram of the wireless communication device 1000 of the exemplary embodiment of concept according to the present invention.
With reference to Figure 18, wireless communication device 1000 (it is the example of communication device) may include symbol power tracking amplification system System (100), specific integrated circuit (application specific integrated circuit；ASIC) 1010, dedicated finger Enable set processor (application specific instruction set processor；ASIP) 1030, memory 1050, primary processor 1070 and main memory 1090.Symbol power tracking amplification system (100) can be supported by describing in figure Embodiment track modulation technique the symbol power applied.In ASIC 1010, ASIP 1030 and primary processor 1070 At least two can communicate with one another.In addition, ASIC 1010, ASIP 1030, memory 1050, primary processor 1070 and primary storage In at least two embeddable one single chips in device 1090.
ASIP 1030 is the customization IC for particular use, and can support the special instruction set for concrete application and hold The instruction for including in row instruction set.Memory 1050 can communicate with ASIP 1030 and serve as non-transitory memory device to store The multiple instruction executed by ASIP 1030.In some embodiments of concept of the present invention, memory 1050 can store the SPT of Fig. 7 Control module 114.Memory 1050 may include any type of memory that can be accessed by ASIP 1030, such as arbitrary access Memory (random access memory；RAM), read-only memory (read-only memory；ROM), tape, magnetic disk, Optical disc, volatile memory, nonvolatile memory and/or combination thereof, but not limited to this.ASIP 1030 or primary processor The 1070 executable series of instructions being stored in memory 1050 and control SPT modulation operations.
Multiple instruction and control wireless communication device 1000 can be performed in primary processor 1070.For example, primary processor 1070 controllable ASIC 1010 and ASIP 1030 can handle the data received via cordless communication network, or processing is wirelessly The user of communication device 1000 inputs.Main memory 1090 can communicate with primary processor 1070 and serve as non-transitory memory device To store the multiple instruction executed by primary processor 1070.
Although having referred to the exemplary embodiment of concept of the present invention and being specifically painted and describe concept of the present invention, It should be understood that in the case where not departing from the spirit and scope of the concept of the present invention limited by appended claim, it can be to this hair Bright concept carries out the various changes of form and details.
Figure 19 is the block diagram of phased array antenna module 2000 according to the embodiment.Hereinafter, wherein phased array will be described Anneta module 2000 carries out the example embodiment of symbol power tracking (SPT) modulation operations for being suitable for the communication of the 5th generation (5G), But concept of the present invention is without being limited thereto and can be applied to other power tracking schemes.
With reference to Figure 19, phased array antenna module 2000 may include power management integrated circuit (power management integrated circuit；PMIC) 2100 and phased array transceiver 2200.PMIC 2100 may include two direct current-direct currents Electric (DC-DC) converter (hereinafter referred to as buck converter) 2110 and direct current-direct current electric transducer 2120,1.1 volt linear leakages Lose (linear drop-out；LDO) linear regulator 2130, auxiliary LDO 2140, fast charge/discharge current source 2150, ginseng Examine voltage generator 2160, controller 2170, multiplexer 2180, multiple capacitor C1.1V, capacitor C1.3V, capacitor CL1 And capacitor CL2, multiple SPT switch SWL1, switch SWL2, switch SWSD1And switch SWSD2And single-inductance double-output (single-inductor dual-output；SIDO) switch SWSIDO.First buck converter 2110 can be implemented to carry out The operation of the first voltage supply circuit 220 and second voltage supply circuit 230 of Fig. 4 A.Second buck converter 2120 can be through reality It imposes according to the time point of SPT operation and is pre-charged or pre-arcing load capacitor CL1With load capacitor CL2.Meanwhile SPT is opened Close SWL1, SPT switch SWL2, SPT switch SWSD1And SPT switch SWSD2It may also be implemented to that the power supply of SPT operation will be corresponded to Voltage VSPTIt is supplied to phased array transceiver 2200.
Controller 2170 may include Mobile Industry Processor Interface (mobile industry processor interface；MIPI) from device 2172, master controller 2174, fixed frequency controller (Fixed Frequency Controller；FFC) 2176 and internal clock source 2178.Phased array transceiver 2200 may include two transmission circuit 2210_ A and transmission circuit 2210_b, micro controller unit (microcontroller unit；MCU) 2220, MIPI master device 2230 with And inside LDO 2240.Transmission circuit 2210_a and transmission circuit 2210_b may include mutiple antennas Ants, multiple radio frequencies (RF) Circuit RF _ CKTs, mixer MIX_a and mixer MIX_b and interface circuit Interface_CKTa.RF circuit RF _ CKTs Each of may include transceiver switch TRX SWa, low-noise amplifier LNA, power amplifier PA, multiple mixer MIX_ A and mixer MIX_b, multiple filter FT_a and filter FT_b and multiple phase-shifter PS.Transmission circuit 2210_a and receipts Power Generation Road 2210_b may be connected to intermediate frequency (IF) the circuit I F_CKT_a and intermediate-frequency circuit IF_CKT_b of IF transceiver.Transmission circuit 2210_a and transmission circuit 2210_b can receive RF signal by antenna Ants, RF signal down is converted into IF signal, and will IF signal is supplied to IF transceiver.
Each of I/F circuit IF_CKT_a and I/F circuit IF_CKT_b may include transceiver switch TRX SWb, low noise Acoustic amplifier LNA, power amplifier PA, multiple mixer MIX_c and mixer MIX_d, multiple filter FT_c and filter FT_d and interface circuit Interface_CKTb.Each of I/F circuit IF_CKT_a and I/F circuit IF_CKT_b can be incited somebody to action The IF signal down received is converted into baseband signal and the baseband signal is supplied to 5G modem.
After generating power-on reset signal by external digital power supply, by PMIC 2100 and phased array transceiver 2200 it Between MIPI caused by digital communication channel can be ready.That is, MIPI master device 2230 and MIPI are between device 2172 Digital communication channel can be ready.
MCU 2220 can be in each cyclic prefix (cylic prefix；CP timing signal Tick) is generated at the time started (or trigger signal) with send power renewal time point and SPT transition time point precise synchronization.Meanwhile MCU 2220 can pass through Data DATA, clock signal clk and timing signal Tick needed for SPT operation of the MIPI master device 2230 by PMIC 2100 The MIPI of controller 2170 is supplied to from device 2172 and master controller 2174.
MIPI can receive data DATA and clock signal clk from device 2172, generates and is based on data DATA and clock signal The signal of CLK reaches reference voltage generator 2160.Reference voltage generator 2160 may include being connected to the first buck converter 2110 the first digital analog converter (DAC) DAC1, and the second decompression is used to selectively connect to by multiplexer 2180 and is turned 2nd DAC DAC2 of parallel operation 2120 and any of auxiliary LDO2140.
Master controller 2174 can receive internal clock signal, and supply voltage V from internal clock source 2178SPTWith power supply electricity Press Vo1.3VAnd load capacitor voltage VC1With load capacitor voltage VC2It can feed back in master controller 2174.Master controller 2174 can be based on the voltage V receivedSPT, voltage Vo1.3V, voltage VC1And voltage VC2And internal clock signal generates use In the enable signal Enables of fast charge/discharge current source 2150, for using the first buck converter 2110 and the second drop Pressure converter 2120 selects the DAC choosing of mode select signal Mode Sel. of power tracking mode, reference voltage generator 2160 Select the signal DAC Sel. and switch control signal Cap.Swap for capacitor swap operation.
Meanwhile FFC 2176 can control the frequency of buck converter 2110, buck converter 2120 at constant.Also It is to say, when operating under sluggish control model, buck converter 2110, buck converter 2120 are asynchronous to arrive reference clock, And it therefore can be changed according to PVT with operating condition and change frequency.This frequency variation, FFC 2176 can will be based in order to prevent The first fixed frequency control (FFC) signal FFC1 and the 2nd FFC signal FFC2 that internal clock signal generates is respectively supplied to drop Pressure converter 2110, buck converter 2120.
It, can will be with load capacitor C in order to carry out SPT operation according to the embodimentL1With load capacitor CL2Between electricity Container swap operation and output capacitor CSPTOn fast charge/discharge operate relevant two control programs and be applied to PMIC 2100.Specifically, capacitor swap operation can be the second buck converter BK of controlSIDOWith load capacitor CL1And load Capacitor CL2Selective connection so that load capacitor CL1With load capacitor CL2It can be in SPT according to the embodiment operation The operation of precharge or pre-arcing.In addition, fast charge/discharge current source 2150 can be used to carry out fast charge/discharge operation. Since reference Fig. 7 A and Fig. 7 B describe fast charge/discharge operation, so detailed description will be omitted.
Since phased array transceiver 2200 can consume larger source current under 1.1 volts, so the second buck converter 2120 implementable 1.3 volts of DC-DC decompression conversions, which enable to operate using SIDO, efficiently carries out son to 1.1 volts of LDO 2130 It adjusts (sub-regulation).
Figure 20 A and Figure 20 B are the schematic diagrams for showing the SPT according to the embodiment using SIDO and operating.Due to the PMIC of Figure 20 A 2100 configuration is identical as with reference to described in Figure 19, so the repeated description by omission to it.
With reference to Figure 20 A, for enable SPT operation, the first buck converter 2110 can be from the 5th generation (5G) modem Receive two data.One data can be the data of the power level about next symbol, and another data can be pass In the data of CP time started.Second buck converter 2120 can be based on when the scheduled current symbol of such as 4.16 microseconds continues In power level data be pre-charged or the first load capacitor of pre-arcing CL1With the second load capacitor CL2.When first When buck converter 2110 carries out SPT operation and the second buck converter 2120 progress precharge operation, auxiliary LDO (is referred to Auxiliary LDO 2140 in Figure 19) power supply of 1.3 volts of supply voltages can be replaced to start smoothly to adjust precharge or pre-arcing first Load capacitor CL1With the second load capacitor CL21.3 volts of voltages and source current in required feedback loop.When first negative Carry capacitor CL1With the second load capacitor CL2On precharge operation when completing, the second buck converter 2120 adjustable 1.3 DC output is lied prostrate to adjust with the son of 1.1 volts of LDO of enable (referring to 1.1 volts of LDO 2130 in Figure 19).Second buck converter 2120 receivable CP time started signals, the first load capacitor CL1With the second load capacitor CL2It can be with VSPTOutput, which disconnects, to be connected It connects, and fast charge/discharge current source 2150 can quick charge or electric discharge output under the control of fast-charge controller 2175 Capacitor CSPT.As output capacitor CSPTWith the first load capacitor CL1Or the second load capacitor CL2Between voltage difference exist When in threshold value, fast-charge controller 2175 can produce exchange trigger signal SWAP_EN, and output capacitor CSPTIt may be in response to It exchanges trigger signal SWAP_EN and is connected to the first load capacitor CL1With the second load capacitor CL2Any of.
In SPT according to the embodiment operation, output capacitor CSPTQuickly-chargeable or electric discharge, and the first load capacitance Device CL1With the second load capacitor CL2The precharge of the second buck converter 2120 or pre-arcing can be passed through.As output capacitor CSPT With the first load capacitor CL1Or the second load capacitor CL2Between voltage difference be threshold value or be less than threshold value when, capacitor hand over Changing operation can be in VSPTOutput and the first load capacitor CL1With the second load capacitor CL2Between carry out.It is thus ensured that transition Terminate within the duration of about 290 nanoseconds (ns), and high input dash current can be prevented.
Referring back to Figure 20 B, the first buck converter BKSPTIt may be in response to the first trigger signal Tick and corresponding to first There to be the first level LV in the duration of uplink channel symbols UL Symbol 11First load capacitor C of voltageL1Even It is connected to VSPTOutput.Therefore, in the duration corresponding to the first uplink channel symbols UL symbol 1, can will have first Level LV1Supply voltage VSPTIt is supplied to power amplification (PA) array (array).In addition, the first buck converter BKSPTIt can ring Ying Yu " PWLS1" signal and generate with second electrical level LV2The second load capacitor voltage VC2.Corresponding to the first uplink In the duration of road symbol UL symbol 1, the first load capacitor C can be passed throughL1Capacitor and output capacitor CSPTElectricity The summation of appearance determines the output load capacitance of PMIC 2100.
Meanwhile in response to the second trigger signal Tick, fast-charge controller 2175 can control output capacitor CSPTOn Fast linear charging operations, so that by supply voltage VSPTLevel be charged to second electrical level LV2.It charges and grasps in fast linear Make in the duration, output capacitor C can be passed throughSPTCapacitor determine the output load capacitance of PMIC 2100.
As output capacitor CSPTWith the second load capacitor CL2Between voltage difference be threshold value or be less than threshold value when, response In the second trigger signal Tick, master controller 2174 can corresponding to the second uplink channel symbols UL Symbol 2 it is lasting when Between in will have second electrical level LV2Second load capacitor C of voltageL2It is connected to VSPTOutput.Therefore, corresponding on second In the duration of downlink symbol UL symbol 2, can there will be second electrical level LV2Supply voltage VSPTIt is supplied to PA times Column.In addition, the first buck converter BKSPTIt may be in response to " PWLS2" signal and generate with third level LV3First load electricity Condenser voltage VC1, and the second buck converter BKSIDOThe first load capacitor C can be pre-chargedL1.Corresponding to the second uplink In the duration of symbol UL symbol 2, the second load capacitor C can be passed throughL2Capacitor and output capacitor CSPTCapacitor Summation determine the output load capacitance of PMIC 2100.
Meanwhile in response to third trigger signal Tick, fast-charge controller 2175 can control output capacitor CSPTOn Fast linear discharge operation, so that by supply voltage VSPTLevel discharge into third level LV3.It discharges and grasps in fast linear Make in the duration, output capacitor C can be passed throughSPTCapacitor determine the output load capacitance of PMIC 2100.
As output capacitor CSPTWith the first load capacitor CL1Between voltage difference be threshold value or be less than threshold value when, response In third trigger signal Tick, master controller 2174 can corresponding to third uplink channel symbols UL Symbol 3 it is lasting when Between in will have third level LV3First load capacitor C of voltageL1It is connected to VSPTOutput.Therefore, on corresponding to third In the duration of downlink symbol UL symbol 3, can there will be third level LV3Supply voltage VSPTIt is supplied to PA times Column.In addition, the first buck converter BKSPTIt may be in response to " PWLS3" signal and generate with the first level LV1Second load electricity Condenser voltage VC2, and the second buck converter BKSIDOThe second load capacitor C can be pre-chargedL2.Corresponding to third uplink In the duration of symbol UL symbol 3, the first load capacitor C can be passed throughL1Capacitor and output capacitor CSPTCapacitor Summation determine the output load capacitance of PMIC 2100.
Figure 21 is two buck converters according to the embodiment comprising being configured to that pulsation is supported to inject sluggish control function The block diagram of the PMIC 3000 of (for example, the first buck converter 3100 and second buck converter 3200).
With reference to Figure 21, PMIC 3000 may include the first buck converter 3100, the second buck converter 3200, auxiliary LDO 3300, multiple switch SWSIDO, switch SWSD1, switch SWSD2, switch SWL1And switch SWL2And multiple capacitor C1.3V, electricity Container CL1, capacitor CL2And capacitor CSPT.First buck converter 3100 may include MP1Transistor, MN1Transistor, grid Driver, SPT inductor LSPT, variable resistance Rr1, multiple resistor Rf1a、Rf1b、Rf1cAnd Rf1d, multiple capacitor Cac1、 Cr1And Cf1, DAC, buffer BUF and the switch DPC for dynamic preliminary filling electric control1.Second buck converter 3200 can Include MP2Transistor, MN2Transistor, gate drivers, SIDO inductor LSIDO, variable resistance Rr2, multiple resistor Rf2a、 Resistor Rf2b, resistor Rf2cAnd resistor Rf2d, multiple capacitor Cac2, capacitor Cr2And capacitor Cf2, DAC, compare Device BUF, for the switch DPC of dynamic preliminary filling electric control2And load capacitor C will be connected to1.3V, load capacitor CL1 And load capacitor CL2Multiple feedbacks select switch FSS1.3V, feedback selection switch FSSC1And feedback selection switch FSSC2.Meanwhile assisting LDO 3300 may include comparator COMP, feedback block FB and MP3Transistor.
As depicted in Figure 21, the configuration of the first buck converter 3100 and the second buck converter 3200 can be used true The stability and smooth transition in circuit are protected, and even if in the presence of the feed back input sharply changed, the first buck converter 3100 and the The target output of two buck converters 3200 can also stablize.That is, the first buck converter 3100 and the second decompression conversion Device 3200 can go on smoothly SPT operation and SIDO operation respectively.
In the first buck converter 3100 according to the embodiment and the second buck converter 3200, dynamic preliminary filling electric control Method can pass through some switch DPC1With switch DPC2Applied to lagging feedback circuit.Only need SPT or SIDO transition time straight Connect the forward path to be formed from internal compensation node is output to.By using above-mentioned dynamic precharge control method, loop response Time can shorten in the time of predetermined amount.According to the situation of SPT operation and SIDO operation, it is included in the first buck converter 3100 and the second reference voltage generator in buck converter 3200 can produce suitable reference voltage with each decompression of enable Adjust operation.Reference voltage generator may include two DAC, two buffer BUF and tracking & holding circuit.
Hysteretic controller may depend on the ratio of input and output to generate the variation of output switching frequency.Output can be switched The change modulates of frequency are at PA transmission signal and by undesirable false (spurious) frequency spectrum designation.
As technique, voltage and temperature (process, voltage, and temperature；When there is variation in PVT), Simple Frequency-locked-loop can be applied to hysteretic controller to ensure because of chosen Inductor-Capacitor by switching frequency controller (inductor-capacitor；LC) the noise attentuation caused by filtering.

Claims (20)

1. a kind of symbol power tracks amplification system, comprising:
Modem is configured to external data signal and generates data-signal and symbol tracking signal；
Symbol tracking modulator includes control circuit, first voltage supply circuit, second voltage supply circuit and switch electricity Road, wherein the control circuit is configured to the symbol tracking signal and generates first voltage level controling signal and Two voltage level control signals, the first voltage supply circuit be configured to the first voltage level controling signal and The first output voltage is generated, the second voltage supply circuit is configured to the second voltage level controling signal and produces Raw second output voltage, and the switching circuit be configured to from the switch control signal that the control circuit provides and incite somebody to action An output in first output voltage and second output voltage is supply voltage；
Radio block is configured to generate radiofrequency signal based on the data-signal from the modem；And
Power amplifier is configured to adjust the radio frequency based on the supply voltage exported from the symbol tracking modulator The power level of signal.
2. symbol power according to claim 1 tracks amplification system, wherein being exported when from the symbol tracking modulator When first output voltage, the second voltage supply circuit generates second output voltage.
3. symbol power according to claim 1 tracks amplification system, wherein during the first symbol period described in output First output voltage.
4. symbol power according to claim 1 tracks amplification system, wherein the control circuit includes: the first digital-to-analogue turns Parallel operation, to generate the first voltage level controling signal；And second digital analog converter, to generate the second voltage level Control signal.
5. symbol power according to claim 1 tracks amplification system, make wherein the first voltage supply circuit has For the first reference voltage from the control circuit the first voltage level controling signal in the first symbol period First output voltage is generated, and when by the first voltage supply circuit to drive first output voltage, institute Stating second voltage supply circuit has the second voltage level controling signal as the second reference voltage described first Prepare second output voltage in symbol period.
6. symbol power according to claim 5 tracks amplification system, wherein in the standard in first symbol period After standby second output voltage, from symbol tracking modulator output the second output electricity in the second symbol period Pressure.
7. symbol power according to claim 5 tracks amplification system, wherein being prepared by charging to capacitor Second output voltage, while first output voltage is exported from the output node of the symbol tracking modulator.
8. symbol power according to claim 1 tracks amplification system, wherein the first voltage supply circuit includes single Inductor multiple output converter.
9. a kind of symbol tracking modulator, comprising:
Control circuit is configured to symbol tracking signal and generates the first reference voltage and the second reference voltage；
First voltage supply circuit is configured to first reference voltage and generates the first output voltage；
Second voltage supply circuit is configured to second reference voltage and generates the second output voltage；And
Switching circuit is configured to from the switch control signal that the control circuit provides and by first output voltage It is supply voltage with an output in second output voltage.
10. symbol tracking modulator according to claim 9, wherein providing the symbol tracking letter from modem Number.
11. symbol tracking modulator according to claim 9, wherein the supply voltage is supplied to power amplifier.
12. symbol tracking modulator according to claim 9, wherein when defeated by described first just in the first symbol period When voltage output is the supply voltage out, the second voltage supply circuit preparation, which stays in the second symbol period, to be exported as institute Second output voltage of supply voltage is stated, second symbol period appears in after first symbol period.
13. symbol tracking modulator according to claim 9, wherein being exported during the first symbol period by described first Voltage output is the supply voltage, and defeated by described second during the second symbol period after first symbol period Voltage output is the supply voltage out.
14. symbol tracking modulator according to claim 9, wherein defeated by described first during the first set of symbols period Voltage output is the supply voltage out, and will be described during the second set of symbols period after the first set of symbols period The output of second output voltage is the supply voltage.
15. symbol tracking modulator according to claim 9, further comprises:
First capacitor device is used to selectively connect to the output node of the symbol tracking modulator；And
Second capacitor is used to selectively connect to the output node of the symbol tracking modulator.
16. symbol tracking modulator according to claim 15, wherein when the first capacitor device is in the first symbol period In when being connected to the output node of the symbol tracking modulator, second capacitor disconnected from the output node and It is charged by the second voltage supply circuit.
17. symbol tracking modulator according to claim 16, wherein second after first symbol period accords with In number period, second capacitor is connected to the output node of the symbol tracking modulator, and the first capacitor Device is disconnected from the output node and is charged by the first voltage supply circuit.
18. symbol tracking modulator according to claim 16, wherein by described second in first symbol period Capacitor, which is charged to, to be had in second symbol period from the supply voltage that the symbol tracking modulator exports Same level.
19. a kind of method of functional symbol power tracking amplification system, comprising:
At least one parameter based on instruction communication environment receives communication environment information at modem；
The number for the symbol for including in set of symbols unit is determined at the modem based on the communication environment information；With And
The symbol power tracking amplification system is controlled via the modem based on the set of symbols unit.
20. the method for functional symbol power tracking amplification system according to claim 19, wherein controlling the symbol In power tracking amplification system, symbol tracking signal is output to the symbol power tracking amplification system by the modem System, the symbol tracking signal are based on the set of symbols unit.
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