WO2011150703A1 - 快速跟踪电源的控制方法、快速跟踪电源及系统 - Google Patents

快速跟踪电源的控制方法、快速跟踪电源及系统 Download PDF

Info

Publication number
WO2011150703A1
WO2011150703A1 PCT/CN2011/071365 CN2011071365W WO2011150703A1 WO 2011150703 A1 WO2011150703 A1 WO 2011150703A1 CN 2011071365 W CN2011071365 W CN 2011071365W WO 2011150703 A1 WO2011150703 A1 WO 2011150703A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
control signal
tracking
source
output
Prior art date
Application number
PCT/CN2011/071365
Other languages
English (en)
French (fr)
Inventor
侯召政
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11789082.2A priority Critical patent/EP2579456B1/en
Priority to EP19192009.9A priority patent/EP3661051A1/en
Priority to ES11789082T priority patent/ES2765647T3/es
Publication of WO2011150703A1 publication Critical patent/WO2011150703A1/zh
Priority to US13/686,676 priority patent/US8897724B2/en

Links

Classifications

    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1607—Supply circuits
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0244—Stepped control
    • H03F1/025—Stepped control by using a signal derived from the input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/102—A non-specified detector of a signal envelope being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/432—Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/507—A switch being used for switching on or off a supply or supplying circuit in an IC-block amplifier circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/511—Many discrete supply voltages or currents or voltage levels can be chosen by a control signal in an IC-block amplifier circuit

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for quickly tracking a power supply, a fast tracking power supply, and a system.
  • Modern wireless communication systems such as Code Division Multiple Adds (CDMA), Wideband Code Division Multiple Address (WCDMA), Universal Mobile Telecommunication System (UMTS), and Next Generation Networks Networks such as LTE (Long Term Evolution) generally use variable envelope modulation techniques of simultaneous amplitude modulation and phase modulation to make full use of the spectrum.
  • CDMA Code Division Multiple Adds
  • WCDMA Wideband Code Division Multiple Address
  • UMTS Universal Mobile Telecommunication System
  • Next Generation Networks Networks such as LTE (Long Term Evolution) generally use variable envelope modulation techniques of simultaneous amplitude modulation and phase modulation to make full use of the spectrum.
  • Variable envelope modulation technology requires linear amplifiers for signal amplification. To ensure linearity and improve power amplifier efficiency, it is often implemented by Envelope Tracking (ET) technology.
  • Envelope Tracking Envelope Tracking
  • the signal After being driven and amplified by the driving amplifier 01, the signal is output to the RF power amplifier 02, and the envelope detector 03 extracts the envelope signal of the RF signal, and the envelope signal is amplified by the fast tracking power supply 04, and the amplified envelope signal is used as the envelope signal.
  • the scheme divides the power supply into two parts: a linear power supply 041 and a switching power supply 042.
  • the linear power supply 041 and the switching power supply 042 are connected in parallel at the output to supply power to the RF power amplifier.
  • the high-frequency part of the power is output by the linear power supply 041
  • the low-frequency part of the power is output by the switching power supply 042.
  • the linear power supply 041 is a voltage source that uses a voltage closed loop to track the high frequency envelope signal.
  • the switching power supply 042 is a low frequency current source that uses a current closed loop for detecting the output current of the linear power supply 041 before the linear power supply 041
  • the output current regulates the output current of itself (ie, switching power supply 042), making the output current of the linear power supply 041 as small as possible. This solution ensures a low distortion of the output through the linear power supply 041 and improves overall efficiency through the switching power supply 042.
  • Embodiments of the present invention provide a fast tracking power control method, a fast tracking power supply, and a system, which can improve the overall efficiency of power amplification.
  • a fast tracking power supply comprising a combined controllable voltage source, a current detecting unit and a tracking current source, wherein the combined controllable voltage source comprises a linear amplifier and a supply voltage switching unit;
  • a linear amplifier configured to receive a first control signal extracted from the reference signal, and control the load voltage according to the received first control signal
  • a supply voltage switching unit configured to receive a second control signal extracted from the reference signal, and provide a different supply voltage combination for the linear amplifier according to the received second control signal
  • a current detecting unit configured to detect an output current of the combined controllable voltage source, and output a third control signal according to the detected condition
  • Tracking current source for receiving the third control signal output by the current detecting unit, adjusting the output current of the tracking current source according to the third control signal, to achieve efficient low-frequency tracking of the load current; combined controllable voltage source and current detecting unit After series connection, the load is supplied in parallel with the tracking current source to provide power to the load.
  • a communication system comprising an envelope detector, a driver amplifier, a radio frequency power amplifier, and any of the fast tracking power supplies provided by embodiments of the present invention
  • the envelope detector is configured to detect a radio frequency signal, extract an envelope signal from the radio frequency signal, and provide the envelope signal as a reference signal to a fast tracking power source;
  • the fast tracking power supply is configured to receive an envelope signal extracted by an envelope detector, and provide a drain voltage and a current for the radio frequency power amplifier according to the envelope signal;
  • the driving amplifier is configured to receive a radio frequency signal, and drive and amplify the radio frequency signal; and the radio frequency power amplifier is configured to receive a driving amplifier to drive the amplified radio frequency signal for amplification.
  • a method for quickly tracking power supply control including:
  • the fast tracking power supply of the embodiment of the invention uses a combined controllable voltage source to supply a voltage to the load, and the combined controllable voltage source and the tracking current source are connected in parallel to provide current to the load, wherein the tracking current source is responsible for providing a low frequency of the load.
  • Current to achieve efficient low-frequency tracking of the load current while minimizing the output current of the combined controllable voltage source, and at the same time, the combined controllable voltage source through the supply voltage switching unit in the combined controllable voltage source
  • the supply voltage range of the linear amplifier is adjusted to reduce the supply voltage range of the linear amplifier, thereby reducing the power consumption of the combined controllable voltage source.
  • the linear amplifier is also A higher tracking bandwidth can be achieved, which improves the overall efficiency of fast tracking power amplification.
  • Figure la is a schematic structural diagram of a variable envelope modulation system in the prior art
  • Figure lb is a schematic structural diagram of a fast tracking power supply provided by the prior art
  • FIG. 2 is a schematic structural diagram of a fast tracking power supply according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of a fast tracking power supply according to Embodiment 2 of the present invention.
  • FIG. 4 is an equivalent circuit diagram of a fast tracking power supply according to Embodiment 3 of the present invention.
  • FIG. 5 is an equivalent circuit diagram of a fast tracking power supply according to Embodiment 4 of the present invention.
  • FIG. 6 is a voltage curve diagram of each unit in the fast tracking power supply according to Embodiment 4 of the present invention
  • FIG. 7 is a current graph of each unit in the fast tracking power supply according to Embodiment 4 of the present invention
  • FIG. 8 is a fifth embodiment of the present invention. An equivalent circuit diagram of the fast tracking power supply provided
  • FIG. 9 is a voltage curve diagram of each unit in a fast tracking power supply according to Embodiment 5 of the present invention.
  • FIG. 10 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 11 is another schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 12 is a flowchart of a method for controlling a fast tracking power supply according to an embodiment of the present invention.
  • Embodiments of the present invention provide a fast tracking power control method, a fast tracking power supply, and a system. The details are described below separately.
  • Embodiment 1
  • the fast tracking power supply comprises a combined controllable voltage source 11, a current detecting unit 12 and a tracking current source 13, wherein the combined controllable voltage source 11 comprises a linear amplifier 111 and a supply voltage switching Unit 112;
  • the linear amplifier 111 is configured to receive a first control signal extracted from the reference signal, and provide a voltage to the load 14 according to the received first control signal; the linear amplifier 111 may adopt a push-pull structure amplifier. It can be a linear amplifier of type A (ClassA), type B (ClassB), and AB type (ClassAB).
  • ClassA type A
  • ClassB type B
  • ClassAB AB type
  • the supply voltage switching unit 112 is configured to receive a second control signal extracted from the reference signal, and provide a different supply voltage combination for the linear amplifier 111 according to the received second control signal; in this case, the supply voltage range of the linear amplifier 111 is It is not necessary to cover the entire voltage range, but is kept within a small supply voltage range. Since the current supplied by the linear amplifier accounts for a small proportion of the load current, if the covered supply voltage range is simultaneously reduced, the linear amplifier is The power consumed is also reduced, that is, the high-precision and low-efficiency portion of the combined controllable voltage source is reduced in power consumption, and the efficiency of the entire device is improved.
  • the current detecting unit 12 is configured to detect an output current of the combined controllable voltage source 11 and output a third control signal according to the detected condition;
  • the tracking current source 13 is configured to receive the third control signal output by the current detecting unit 12, and adjust the output current of the tracking current source 13 according to the third control signal to achieve efficient low-frequency tracking of the load current; the tracking current source may specifically Buck (BUCK) circuit, or boost (BOOST) circuit, or buck or boost (BUCK-BOOST) circuit, or chopper (CUK) circuit.
  • BUCK Buck
  • BOOST boost
  • BUCK-BOOST buck or boost
  • CUK chopper
  • the tracking current source 13 After the combined controllable voltage source 11 is connected in series with the current detecting unit 12, the current is supplied to the load 14 in parallel with the tracking current source 13. Since the tracking current source 13 has high-efficiency and low-accuracy properties, and the linear amplifier 111 has an inefficient and high-precision property, in order to improve the efficiency of the entire fast tracking power supply, the tracking current source 13 is used to provide the low-frequency portion of the load current.
  • the output current of the combined controllable voltage source 11 is equal to the difference between the load current and the output current of the tracking current source 13, for example, If the load current is Io and the output current of the tracking current source 13 is II, the output current of the combined controllable voltage source 11 is Io-Il.
  • the fast tracking power supply of the embodiment adopts the combined controllable voltage source 11 as the load.
  • the tracking current source 13 is responsible for providing the low frequency and large current of the load 14 to achieve the load.
  • the supply voltage range of the linear amplifier 111 is adjusted such that the supply voltage range of the linear amplifier 111 is reduced, thereby reducing the power consumption of the combined controllable voltage source 11, and since the supply voltage range of the linear amplifier 111 is reduced,
  • the linear amplifier 111 also achieves a higher tracking bandwidth and improves the overall efficiency of fast tracking power amplification.
  • the power supply voltage switching unit 112 may include a level selection branch and at least two voltage sources having different voltage values; as follows:
  • a voltage source for supplying a voltage which can be implemented in various forms according to the needs of the actual application;
  • a level selection branch is configured to receive the second control signal, and select a voltage source according to the received second control signal to provide a supply voltage to the linear amplifier 111.
  • the level selection branch is composed of a device for driving the circuit, the switching device and the diode; the driving device is configured to receive the second control signal, select the voltage source according to the received second control signal, and drive the switching device to switch.
  • a bootstrap driving device or an isolated driving device may be used.
  • driver 1 (DRV1, Drivers 1), DRV2 or DRV3, etc. may be used;
  • the switching device is used for switching between voltage sources; the switching device may be a device such as a high-speed metal-oxide-semiconductor field effect transistor (MOSFET), or a transistor such as a triode.
  • MOSFET metal-oxide-semiconductor field effect transistor
  • a diode that prevents reverse voltages with different voltages and provides reverse blocking.
  • the specific implementation circuit of the level selection branch is not limited, and may be based on a specific group.
  • the different circuits of the device are selected to be implemented by the switching of different voltage sources through the level selection branch, and the output stepped voltage is supplied to the linear amplifier.
  • the current detecting unit 12 is specifically configured to detect an output current of the combined controllable voltage source 11. When detecting that the output current of the combined controllable voltage source 11 becomes large, the output indicates that the output current of the tracking current source 13 is increased. a third control signal; when detecting that the output current of the combined controllable voltage source 11 becomes small, outputting a third control signal indicating that the output current of the tracking current source 13 is reduced;
  • the tracking current source 13 is specifically configured to increase the output current of the tracking current source 13 when receiving the third control signal output by the current detecting unit 12 indicating that the output current of the tracking current source 13 is increased, and receiving the current.
  • the third control signal output by the detecting unit 12 that reduces the output current of the tracking current source 13 is reduced, the output current of the tracking current source 13 is reduced.
  • the fast tracking power supply may further include a control unit 10;
  • the control unit 10 is configured to receive the reference signal, output a first control signal to the supply voltage switching unit 112 according to the reference signal, and output a second control signal to the linear amplifier 111.
  • the reference signal is an envelope signal from the envelope detector. Since the voltage and power of the envelope signal are generally small, it is necessary to amplify the voltage and power by the fast tracking power supply device in the embodiment of the present invention, and then The enveloping envelope signal is used as the drain voltage of the radio frequency power amplifier. For details, refer to the prior art, and details are not described herein.
  • the envelope signal as the reference signal may be an analog signal or a digital signal.
  • control unit 10 After receiving the reference signal, the control unit 10 outputs the first control signal to the supply voltage switching unit 112 and the second control signal to the linear amplifier 111, so that the respective unit output signals correspond in time, so as to be superimposed
  • the correct output signal can be obtained, and the control unit 10 can further include: performing delay matching on the first control signal and the second control signal.
  • control unit 10 may be a processing chip such as a digital signal processing (DSP), a Field Programmable Gate Array (FPGA), or other processing unit having similar functions.
  • DSP digital signal processing
  • FPGA Field Programmable Gate Array
  • the fast tracking power supply of the present embodiment uses a combined controllable voltage source 11 to supply a voltage to the load.
  • the combined controllable voltage source 11 is connected in series with the current detecting unit 12, and is connected in parallel with the tracking current source 13 to provide a load.
  • the tracking current source 13 having high efficiency and low precision properties is responsible for providing most of the current in the load current to achieve efficient low frequency tracking of the load current, while minimizing the output current of the combined controllable voltage source 11 ( That is, reducing the output current of the linear amplifier 111) Reducing the output power of the linear amplifier 111 having inefficient high-precision properties, resulting in a reduction in power loss due to the low output efficiency of the linear amplifier 111 (because the linear amplifier 111 is an inefficient and high-precision device), thereby increasing the speed Track the conversion efficiency of the power supply as a whole.
  • the supply voltage range of the linear amplifier 111 in the combined controllable voltage source 11 is adjusted by the supply voltage switching unit 112 in the combined controllable voltage source 11, so that the supply voltage range of the linear amplifier 111 is reduced. It is also possible to reduce the power consumption of the combined controllable voltage source 11, and since the supply voltage range of the linear amplifier 111 is reduced, the linear amplifier 111 can also achieve a higher tracking bandwidth.
  • Embodiment 3 the overall efficiency of fast tracking power amplification can be improved while ensuring high-bandwidth, high-precision signals.
  • FIG. 4 is an equivalent circuit of the fast tracking power supply, including a combined controllable voltage source Al1, a current detecting unit A12, and a tracking current source A13; a combined controllable voltage source Al1 and a current detecting unit A12. After series connection, it is connected in parallel with the tracking current source A13.
  • the combined controllable voltage source Al l is equivalent to the combined controllable voltage source 11 in FIG. 3 , and may include a controllable voltage source A11, a driving device, a switch S1, and three voltage sources: VI, V2, and V3. .
  • the controllable voltage source A111 is equivalent to the linear amplifier 111 in FIG. 3, and is configured to receive a first control signal extracted from the reference signal, and supply a voltage to the load 14 according to the received first control signal.
  • a portion A112 composed of a device such as a switch S1, a driving device, and a voltage source is equivalent to the power supply voltage switching unit 112 in FIG. 3, and is configured to receive a second control signal extracted from the reference signal, and is configured according to the received second control signal.
  • the regulated voltage source Mi ll provides a different supply voltage combination.
  • the switching can be implemented by the switch S1.
  • the switch S1 when the switch S1 is connected to the voltage source VI, the voltage value outputted to the controllable voltage source A111 (ie, the linear amplifier 111) is VI, and when the switch S1 is connected to the voltage source.
  • V2 When V2 is on, the voltage value output to the controllable voltage source A111 is V2, and so on.
  • the switch S 1 can be specifically a device such as a high speed MOSFET or a triode.
  • the driving device is mainly used for receiving the second control signal according to the received
  • the "OQ" second control signal selects the voltage source and drives the switch SI to switch.
  • the driver device can use either a bootstrap driver or an isolated driver.
  • the current detecting unit A12 which is equivalent to the current detecting unit 12 in FIG. 3, is configured to detect the output current "Il-Io" of the combined controllable voltage source Al1, and output a third control signal according to the detected condition; for example, when detecting When the output current "Il-Io" of the combined controllable voltage source 11 becomes larger, a third control signal indicating that the output current II of the tracking current source 13 is increased is output; when the output of the combined controllable voltage source 11 is detected When the current "II - Io" becomes small, a third control signal indicating the decrease of 'j, the output current 11 of the tracking current source 13 is output;
  • the tracking current source A13 is equivalent to the tracking current source 13 in FIG. 3, and is configured to receive the third control signal output by the current detecting unit 12, and adjust the output current II of the tracking current source 13 according to the third control signal to implement the load current. Efficient low frequency tracking of Io; for example, if the received third control signal indicates an increase in the output current II of the tracking current source 13, the output current II of the tracking current source 13 is increased; if the received third control signal indicates a reduced tracking The output current II of the current source 13 reduces the output current II of the tracking current source 13.
  • control unit 10 may be further included.
  • the control unit 10 may be further included.
  • switching is performed by using only three voltage sources as an example.
  • the number of voltage sources and the number of switches can be adjusted according to actual needs.
  • the fast tracking power supply of the embodiment uses the combined controllable voltage source Al l to supply voltage to the load, and the combined controllable voltage source All is connected in series with the current detecting unit A12, and is connected in parallel with the tracking current source A13 as a load.
  • the first tracking current source A13 having high efficiency and low precision property is responsible for providing most of the current in the load current to achieve efficient low frequency tracking of the load current, while minimizing the output of the controllable voltage source Al 11
  • the current is used to reduce the output power of the controllable voltage source A111 having inefficient high-precision properties, so that the power loss due to the low output efficiency of the controllable voltage source A111 is reduced, thereby improving the conversion efficiency of the fast tracking power supply as a whole.
  • the supply voltage range of the controllable voltage source A111 is adjusted by the device such as the driving device and the switch S1, so that the supply voltage range of the controllable voltage source A111 is reduced, and the combined controllable voltage source All can also be reduced. Power consumption, and, because the supply voltage range of the controllable voltage source A111 is reduced, the controllable voltage source A111 can also achieve a higher tracking bandwidth. In short, with this scheme, the overall efficiency of fast tracking power amplification can be improved while ensuring high-bandwidth, high-precision signals.
  • FIG. 5 is another equivalent circuit of the fast tracking power supply, including the controller B10, the combined controllable voltage source B1 l, the current detecting unit B12, and the switching current source B13; the combined controllable voltage source B11 After being connected in series with the current detecting unit B12, it is connected in parallel with the tracking current source B13.
  • the combined controllable voltage source B1 l is equivalent to the combined controllable voltage source 11 for controlling the output voltage and being supplied to the load;
  • the combined controllable voltage source B11 may comprise a linear amplifier Bi ll and a supply voltage switching unit B112.
  • the controller B10 which is equivalent to the control unit 10 in Fig. 3, is for receiving a reference signal, outputs a first control signal to the supply voltage switching unit 112 according to the reference signal, and outputs a second control signal to the linear amplifier 111.
  • the reference signal here is an envelope signal detected by an envelope detector, and the envelope signal may be an analog signal or a digital signal digitized by an envelope detector.
  • the controller B10 also needs to perform delay matching on the first control signal and the second control signal obtained after the processing, so that the signals output by the respective units are superimposed at the same time, and the signal can be obtained. The correct output signal.
  • the linear amplifier Bi ll is equivalent to the linear amplifier 111 in FIG. 3 for receiving the first control signal sent by the controller B10, and supplying the voltage to the load 14 according to the received first control signal; the linear amplifier 111 can adopt Push-Pull
  • the structure of the amplifier, according to the actual requirements can be, but is not limited to, Class A, Class B, Class AB type linear amplifier, in order to improve the tracking accuracy, the linear amplifier 111 can also use the output feedback control, see Figure 5.
  • the power supply voltage switching unit B112 is equivalent to the power supply voltage switching unit 112 in FIG. 3, and is configured to receive the second control signal sent by the controller B10, and provide the positive power supply voltage rail for the linear amplifier Bi11 according to the received second control signal.
  • Level VCC is the first control signal sent by the controller B10, and provide the positive power supply voltage rail for the linear amplifier Bi11 according to the received second control signal.
  • the current detecting unit B12 is equivalent to the current detecting unit 12 in FIG. 3, and is configured to detect an output current of the combined controllable voltage source B11, and output a third control signal according to the detected condition; for example, when detecting a combined controllable voltage When the output current of the source 11 becomes large, the output indicates that the tracking current source 13 is increased. a third control signal for outputting current; when detecting that the output current of the combined controllable voltage source 11 becomes small, outputting a third control signal indicating that the output current of the tracking current source 13 is decreased;
  • the tracking current source B13 is equivalent to the tracking current source 13 in FIG. 3, and is configured to receive the third control signal output by the current detecting unit B12, and adjust the output current of the tracking current source B13 according to the third control signal to achieve the load. Efficient low frequency tracking of current. For example, if the received third control signal indicates an increase in the output current of the tracking current source 13, the output current of the tracking current source 13 is increased; if the received third control signal indicates that the output current of the tracking current source 13 is decreased, then The output current of the tracking current source 13 is reduced.
  • the power supply voltage switching unit B112 may include a power supply voltage switching branch composed of a multi-route voltage source, a diode, a MOSFET, and a driving device, and each of the power supply voltage switching branches has a different voltage source.
  • the power supply voltage switching unit B112 has three kinds of positive power supply voltage rail supply levels Vccl, Vcc2, and Vcc3, and each positive power supply voltage rail supply level corresponds to one supply voltage switching branch, respectively, in order to prevent different Level-through, each supply voltage switching branch has a diode, see Dl, D2 and D3 in Figure 5, these diodes are used to provide reverse blocking function; in addition, each supply voltage switching branch Also connected in series with a MOSFET, such as M1, M2, and M3 in FIG. 5, these MOSFETs are equivalent to switching transistors for selecting an appropriate level supply among the positive supply rail supply levels Vccl to Vcc3 by the second control signal.
  • a MOSFET such as M1, M2, and M3 in FIG. 5
  • each MOSFET also corresponds to a driving device.
  • M1 corresponds to the driving device DRV1
  • M2 corresponds to the driving device DRV2
  • M3 corresponds to the driving device DRV3
  • these driving devices may specifically be Bootstrap driver or isolated driver device.
  • the switch tracking current source B13 can be composed of a single buck circuit with no output capacitor for controlling the opening and closing of the switch M4 by the third control signal to change the current in the inductor L1 to control the output current of the tracking current source B13. To achieve efficient low frequency tracking of the load current.
  • the switch tracking current source B13 may further include a diode D4 and a driving device DRV4;
  • Diode D4 is connected in parallel with switch M4 to provide an inductor current freewheel path when switch M4 is turned off.
  • the driving device DRV4 is configured to provide driving for the switching transistor M4 according to the third control signal.
  • the switch tracking current source B13 may further include a modulation/controller B131, the modulation/control ...11...
  • the controller B131 is connected in series with the driving device DRV4 for performing modulation control on the received third control signal.
  • the fast tracking power supply can also include a D/A conversion unit B15;
  • the D/A conversion unit B15 is configured to convert the received first control signal from a digital signal to an analog signal, and then to the linear amplifier B111.
  • the circuit output step voltage Vcc can be supplied to the linear amplifier Bi l l , that is, the output voltage is used as the drain voltage of the linear amplifier Bi l l .
  • the voltage Vcc outputted by the power supply voltage switching unit B112 is as shown by a curve 1002, and the output voltage waveform of the combined controllable voltage source B 11 is as shown by a curve 1001, and the Vss voltage of the linear amplifier B 111 (ie, the negative voltage, specifically Referring to the prior art, as shown by the curve 1003, it can be seen that by switching the voltage source by the supply voltage switching unit B112, the supply voltage range of the linear amplifier Bi ll can be dynamically reduced, that is, the value of Vcc-Vss is reduced, and In the fast tracking power supply, the tracking current source B13 is mainly responsible for providing most of the current in the load current to achieve efficient low-frequency tracking of the load current, while the output current of the linear amplifier Bi ll is very small, so the linear amplifier Bi can be reduced.
  • the output power of ll that is, the power loss caused by the low output efficiency of the linear amplifier Bi ll, achieves the goal of improving the conversion efficiency of the fast tracking power supply as a whole
  • the load current can be as shown by the curve 10010
  • the output current of the current source B 13 can be as shown by the curve 10011.
  • the output current of the controllable voltage source B11 is as shown by the curve 10012. It can be seen that the output current of the tracking current source B13 can achieve high-efficiency low-frequency tracking of the load current, and the output current of the combined controllable voltage source B11 (ie, the linear amplifier Bi The output current of ll is also small, so this scheme can improve the conversion efficiency of the entire device.
  • the linear amplifier Bi l l can achieve a higher tracking bandwidth.
  • Vcc and Vss can also be adjusted according to the needs of the application scenario. That is, after receiving the second control signal, the power supply voltage switching unit 112 can simultaneously control the values of Vcc and Vss according to the second control signal.
  • Vccl voltage values of Vccl, Vcc2, Vssl, and Vss2 are provided, that is, a total of four voltage ranges are provided for the linear amplifier 111: "Vccl-Vssl”, “Vccl-Vss2", “Vcc2-Vssl” and “Vcc2-Vss2,, ; where Vccl and Vcc2 are controlled by drive device DRV5 and switch S5, and Vssl and Vss2 are controlled by drive device DRV6 and switch S6, for example, when the second control signal controls drive device DRV5 When the switch S5 is turned on and the driving device DRV6 is turned on, the power supply voltage switching branch where Vccl is located and the power supply voltage switching branch where Vss1 is located become the path.
  • the voltage range of the linear amplifier 111 is "Vccl- Vssl" ;
  • the second control signal controls the driving device DRV5 to turn off the switch S5, and simultaneously controls the driving device DRV6 to turn on the switch S6, the power supply voltage switching branch where Vcc2 is located and the power supply voltage switching branch where Vssl is located become the path, then this When the linear amplifier 111 has a voltage range of "Vcc2-Vssl", and so on, etc.
  • Each of the supply voltage switching branches also includes a diode, see D5, D6, D7 and D8 in Figure 8.
  • the combined controllable voltage source 11 output voltage waveform is as shown in the curve 2001.
  • the Vcc voltage supplied from the supply voltage switching unit 112 is as shown by the curve 2002, and the Vss voltage supplied from the supply voltage switching unit 112 is as shown by the curve 2003.
  • the switching of Vcc and Vss by the power supply voltage switching unit 112 can dynamically reduce the supply voltage range of the linear amplifier 111, that is, reduce the value of Vcc-Vss, thereby reducing the output power of the linear amplifier and improving the conversion efficiency of the device.
  • the configuration of the foregoing power supply voltage switching unit 112 is not unique. In practical applications, other similar functional circuits or integrated devices having corresponding functions may be used.
  • the MOSFET may be replaced by a device such as a triode. This is not limited here.
  • the number of voltage sources can also be adjusted according to the needs of the actual application, that is, in practical applications, multiple voltage sources and multiple switching circuits can also be used to switch between more voltage rails.
  • an embodiment of the present invention further provides a communication system.
  • the communication system includes an envelope detector 601, a driving amplifier 603, a radio frequency power amplifier 604, and an embodiment of the present invention. Any of the fast tracking power supplies 602 provided.
  • the envelope detector 601 is configured to detect the radio frequency signal, extract the envelope signal from the radio frequency signal, and provide the extracted envelope signal as a reference signal to the fast tracking power source 602.
  • the fast tracking power supply 602 is configured to receive the envelope signal extracted by the envelope detector 601, and provide the drain voltage and current to the RF power amplifier 604 according to the envelope signal. For details, refer to the previous embodiment, and details are not described herein.
  • the driving amplifier 603 is configured to receive a radio frequency signal, and drive and amplify the radio frequency signal.
  • the RF power amplifier 60 4 is configured to receive the driver amplifier 603 to drive the amplified RF signal for amplification.
  • the communication system can also include a transmit processing unit 605.
  • the transmitting processing unit 605 is configured to process the amplified RF signal of the RF power amplifier 604.
  • the communication system can also include a signal processing unit 606.
  • the signal processing unit 606 is configured to process the radio frequency signal and send it to the envelope detector 601 and the driver amplifier 603.
  • the fast tracking power supply 602 in the communication system employs a majority of the current supplied by the tracking current source 13 for the RF power amplifier 604 to achieve efficient low frequency tracking of the current to the RF power amplifier 604, while at the same time
  • the drain voltage of the radio frequency power amplifier 604 is controlled by the combined controllable voltage source 11, and the output power of the linear amplifier 111 having inefficient high precision is reduced by adjusting the supply voltage range of the linear amplifier 111, so that the linear amplifier The power loss caused by the low output efficiency is reduced, thereby improving the conversion efficiency of the fast tracking power supply as a whole, and since the supply voltage range of the linear amplifier 111 is reduced, the linear amplifier 111 can achieve a higher tracking bandwidth. Since the overall efficiency of the fast tracking power supply 602 is improved, the efficiency of the communication system is naturally improved. Example VII.
  • the embodiment of the present invention further provides a method for quickly tracking power supply.
  • the specific process is as follows:
  • the supply voltage range of the linear amplifier 111 does not need to cover the entire voltage range. Instead, it stays within a small supply voltage range. Since the current of the linear amplifier is inherently small, if the range of the supplied supply voltage is reduced, the power consumed by the linear amplifier is also reduced, that is, the combined controllable The power consumption of the voltage source is reduced.
  • detecting an output current of the combined controllable voltage source when detecting that the output current of the combined controllable voltage source becomes large, outputting a third control signal indicating an increase of the output current of the tracking current source; when detecting the combined type When the output current of the voltage control source becomes small, the output outputs a third control signal indicating that the output current of the tracking current source is reduced;
  • the fast tracking power control method may further include steps 705 and 706;
  • the envelope signal as the reference signal may be an analog signal or a digital signal.
  • the input signal type of the linear amplifier is an analog signal
  • the digital signal needs to be converted into an analog signal
  • the first control signal and the second control signal can also be delayed matched.
  • the present embodiment adopts a tracking current source with high efficiency and low precision according to the third control signal to provide most of the current for the load, thereby achieving efficient low frequency tracking of the load current, and at the same time, controlling according to the first control signal.
  • a combined controllable voltage source provides voltage to the load and is based on The second control signal reduces the output power of the linear amplifier with inefficient high precision by adjusting the supply voltage range of the linear amplifier, so that the power loss due to the low efficiency of the linear amplifier output is reduced, thereby improving the overall speed of the fast tracking power supply. Conversion efficiency.
  • the supply voltage range of the linear amplifier is reduced, a higher tracking bandwidth can be achieved.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: Read only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Description

...1... 快速^ ^电源的控制方法、 快速^ ^电源及系统 技术领域
本发明涉及通信技术领域， 具体涉及一种快速跟踪电源的控制方法、 快 速艮踪电源及系统。
背景技术
现代无线通信系统如码分多址（CDMA， Code Division Multiple Addres s )、 宽带码分多址（ WCDMA, Wideband Code Division Multiple Address )、 通用移动通信系统 ( UMTS, Universal Mobile Telecommunication System ) 和下一代网络 ( LTE, Long Term Evolution )等网络为充分利用频谱， 一般 都会采用同时调幅和调相的可变包络调制技术。
可变包络调制技术需要使用线性放大器进行信号放大， 为保证线性度并 提高功放效率， 常采用基于包络跟踪 （ET， Envelope Tracking ) 的技术来实 现， 如图 la所示， 射频信号输入后， 经驱动放大器 01进行驱动放大后输出给 射频功率放大器 02， 同时包络检测器 03提取射频信号的包络信号， 通过快速 跟踪电源 04对包络信号进行放大， 将放大后的包络信号作为射频功率放大器 漏极电压； 最终由射频功率放大器 02输出放大后的射频信号。
随着多载波技术的发展， 对快速跟踪电源的带宽及效率的要求也越来越 高， 将普通开关电源作为快速跟踪电源已经难于满足要求， 因此， 现有技术 提出了一种新的快速跟踪电源。 参见图 lb， 该方案将电源分为两部分： 一个 线性电源 041和一个开关电源 042，线性电源 041和开关电源 042在输出端进 行并联， 共同给射频功放供电。 其中， 由线性电源 041 输出高频部分功率， 由开关电源 042输出低频部分功率。 线性电源 041是一个电压源， 其采用电 压闭环， 跟踪高频包络信号； 开关电源 042是一个低频电流源其采用电流闭 环， 用于检测线性电源 041 的输出电流， 才艮据线性电源 041 的输出电流调节 自身（即开关电源 042 )的输出电流， 使线性电源 041的输出电流尽量小。 该 方案通过线性电源 041保证输出具有较低的失真度， 通过开关电源 042提高 整体的效率。
在对现有技术的研究和实践过程中， 本发明的发明人发现， 现有方案中 的快速跟踪电源功率放大的整体效率不高。 发明内容
本发明实施例提供快速跟踪电源的控制方法、 快速跟踪电源及系统， 可 以提高功率放大的整体效率。
一种快速跟踪电源， 包括组合式可控电压源、 电流检测单元和跟踪电流 源， 其中， 组合式可控电压源包括线性放大器和供电电压切换单元；
线性放大器， 用于接收从参考信号中提取的第一控制信号， 根据接收到 的第一控制信号控制负载电压；
供电电压切换单元， 用于接收从参考信号中提取的第二控制信号， 根据 接收到的第二控制信号为所述线性放大器提供不同的供电电压组合；
电流检测单元， 用于检测组合式可控电压源的输出电流， 根据检测的情 况输出第三控制信号；
跟踪电流源， 用于接收电流检测单元输出的第三控制信号， 根据第三控 制信号调整跟踪电流源的输出电流， 以实现对负载电流的高效低频跟踪； 组合式可控电压源与电流检测单元串联后， 与跟踪电流源并联为负载提 供电 υ。
一种通信系统， 包括包络检测器、 驱动放大器、 射频功率放大器和本发 明实施例提供的任一种快速跟踪电源；
所述包络检测器， 用于对射频信号进行检测， 从所述射频信号中提取包 络信号， 并将所述包络信号作为参考信号提供给快速跟踪电源；
所述快速跟踪电源， 用于接收包络检测器所提取的包络信号， 根据所述 包络信号为射频功率放大器提供漏极电压和电流；
所述驱动放大器， 用于接收射频信号， 并对所述射频信号进行驱动放大； 所述射频功率放大器， 用于接收驱动放大器驱动放大后的射频信号进行 放大。
一种快速跟踪电源的控制方法， 包括：
接收从参考信号中提取的第二控制信号， 根据第二控制信号为组合式可 控电压源中的线性放大器提供不同的供电电压组合；
接收从参考信号中提取的第一控制信号， 在所述电压组合的作用下， 根 据接收到的第一控制信号为负载提供电压；
检测组合式可控电压源的输出电流， 根据检测的情况输出第三控制信号； "' Q" 根据第三控制信号调整跟踪电流源的输出电流， 以实现对负载电流的高 效氐频艮踪。
本发明实施例的快速跟踪电源采用由组合式可控电压源为负载提供电 压， 由组合式可控电压源与跟踪电流源并联为负载提供电流， 其中， 由跟踪 电流源负责提供负载的低频大电流以实现对负载电流的高效低频跟踪， 而尽 量地减小组合式可控电压源的输出电流， 与此同时， 通过组合式可控电压源 中的供电电压切换单元对组合式可控电压源中的线性放大器的供电电压范围 进行调整， 使得线性放大器的供电电压范围减小， 从而减小组合式可控电压 源的功耗， 而且， 由于线性放大器的供电电压范围减小， 所以线性放大器还 可以实现更高的跟踪带宽， 可以提高快速跟踪电源功率放大的整体效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面 描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 la是现有技术中可变包络调制系统的结构示意图；
图 lb是现有技术提供的快速跟踪电源的结构示意图；
图 2是本发明实施例一提供的快速跟踪电源的结构示意图；
图 3是本发明实施例二提供的快速跟踪电源的结构示意图；
图 4是本发明实施例三提供的快速跟踪电源的等效电路图；
图 5是本发明实施例四提供的快速跟踪电源的等效电路图；
图 6是本发明实施例四提供的快速跟踪电源中各单元的电压曲线图； 图 7是本发明实施例四提供的快速跟踪电源中各单元的电流曲线图； 图 8是本发明实施例五提供的快速跟踪电源的等效电路图；
图 9是本发明实施例五提供的快速跟踪电源中各单元的电压曲线图； 图 10是本发明实施例提供的通信系统的结构示意图；
图 11是本发明实施例提供的通信系统的另一结构示意图；
图 12是本发明实施例提供的快速跟踪电源的控制方法的流程图。
具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而 不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作 出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
本发明实施例提供一种快速跟踪电源的控制方法、 快速跟踪电源及系统。 以下分别进行详细说明。 实施例一、
一种快速跟踪电源，参见图 2，该快速跟踪电源包括组合式可控电压源 11、 电流检测单元 12和跟踪电流源 13， 其中， 组合式可控电压源 11包括线性放大 器 111和供电电压切换单元 112;
线性放大器 111， 用于接收从参考信号中提取的第一控制信号， 根据接收 到的第一控制信号为负载 14提供电压； 该线性放大器 111 可以采用推挽式 ( Push-Pull )结构的放大器， 可以是 A类型 （ClassA )、 B 类型 （ ClassB )、 AB类型 （ClassAB ) 的线性放大器。
供电电压切换单元 112， 用于接收从参考信号中提取的第二控制信号， 根 据接收到的第二控制信号为线性放大器 111 提供不同的供电电压组合； 这样 的话， 线性放大器 111 的供电电压范围就无需覆盖整个电压范围， 而是保持 在一个较小的供电电压范围内， 由于线性放大器所提供的电流所占负载电流 比例较小， 所以如果覆盖的供电电压范围同时减小的话， 该线性放大器所消 耗的功率也会减少， 即组合式可控电压源的高精度低效率部分功耗减少， 整 个装置的效率提高。
电流检测单元 12， 用于检测组合式可控电压源 11的输出电流， 根据检测 的情况输出第三控制信号；
跟踪电流源 13， 用于接收电流检测单元 12输出的第三控制信号，根据第 三控制信号调整跟踪电流源 13的输出电流， 以实现对负载电流的高效低频跟 踪； 该跟踪电流源具体可以由降压式（BUCK ) 电路、 或升压式（BOOST ) 电路、 或降压或升压式（BUCK-BOOST ) 电路、 或斩波（CUK ) 电路组成。
组合式可控电压源 11与电流检测单元 12串联后， 与跟踪电流源 13并联 为负载 14提供电流。 由于跟踪电流源 13具有高效低精度的性质， 而线性放 大器 111具有低效高精度的性质， 所以， 为了提高整个快速跟踪电源的效率， 在此由跟踪电流源 13来提供负载电流中的低频部分的大部分电流， 实现对负 载电流的高效低频跟踪， 而组合式可控电压源 11的输出电流 4艮小， 组合式可 控电压源 11 的输出电流的大小等于负载电流与跟踪电流源 13的输出电流之 差， 比如， 如果负载电流为 Io， 跟踪电流源 13的输出电流为 II， 则组合式可 控电压源 11的输出电流为 Io-Il。
由上可知， 本实施例的快速跟踪电源采用由组合式可控电压源 11为负载
14提供电压， 由组合式可控电压源 11与电流检测单元 12串联后， 与跟踪电 流源 13并联为负载提供电流， 其中， 由跟踪电流源 13负责提供负载 14的低 频大电流以实现对负载电流的高效低频跟踪， 而尽量地减小组合式可控电压 源 11 的输出电流， 与此同时， 通过组合式可控电压源 11 中的供电电压切换 单元 112对组合式可控电压源 11中的线性放大器 111的供电电压范围进行调 整， 使得线性放大器 111 的供电电压范围减小， 从而减小组合式可控电压源 11的功耗， 而且， 由于线性放大器 111 的供电电压范围减小， 所以线性放大 器 111 还可以实现更高的跟踪带宽， 可以提高快速跟踪电源功率放大的整体 效率。 实施例二、
根据实施例一所描述的快速跟踪电源， 其中， 供电电压切换单元 112 可 以包括电平选择支路和至少两个具有不同电压值的电压源； 如下：
电压源， 用于提供电压， 该电压源可以根据实际应用的需要采用多种形 式来实现；
电平选择支路， 用于接收第二控制信号， 根据接收到的第二控制信号选 择电压源， 以便为线性放大器 111提供供电电压。
其中， 电平选择支路由驱动器件、 开关器件和二极管等器件组成； 驱动器件， 用于接收第二控制信号， 根据接收到的第二控制信号选择电 压源， 并驱动开关器件进行切换。 具体可以采用自举驱动器件或隔离驱动器 件， 例如， 可以采用驱动 1 ( DRV1， Drivers 1 )、 DRV2或 DRV3等等；
开关器件， 用于在电压源之间进行切换； 该开关器件具体可以为高速金 属氧化物半导体场效应管（MOSFET, Metal-Oxide- Semiconductor Field-Effect Transistor )或三极管等器件等。
二极管， 用于防止具有不同电压直通， 提供反向阻止。
需说明的是， 电平选择支路的具体实现电路并不限定， 可以根据具体组 成器件的不同选择具体电路进行实现， 通过电平选择支路的对不同电压源的 切换选择， 输出阶梯状电压为线性放大器供电。
其中，电流检测单元 12，具体用于检测组合式可控电压源 11的输出电流， 当检测到组合式可控电压源 11的输出电流变大时， 输出指示增加跟踪电流源 13的输出电流的第三控制信号； 当检测到组合式可控电压源 11的输出电流变 小时， 输出指示减小跟踪电流源 13的输出电流的第三控制信号；
则此时， 跟踪电流源 13， 具体用于在接收到电流检测单元 12输出的指示 增加跟踪电流源 13的输出电流的第三控制信号时， 提高跟踪电流源 13的输 出电流， 在接收到电流检测单元 12输出的指示减小跟踪电流源 13的输出电 流的第三控制信号时， 减小跟踪电流源 13的输出电流。
进一步的， 参见图 3， 该快速跟踪电源还可以包括控制单元 10;
控制单元 10，用于接收参考信号，根据参考信号向供电电压切换单元 112 输出第一控制信号， 向线性放大器 111输出第二控制信号。
其中， 参考信号为来自包络检测器的包络信号， 由于该包络信号的电压 和功率一般较小， 所以需要通过本发明实施例中的快速跟踪电源装置将其电 压和功率进行放大， 然后将放大后的包络信号作为射频功率放大器的漏极电 压， 具体可参见现有技术， 在此不再赘述； 该作为参考信号的包络信号具体 可以为模拟信号， 也可以为数字信号。
控制单元 10接收到参考信号后， 在向供电电压切换单元 112输出第一控制 信号， 以及向线性放大器 111输出第二控制信号时， 为了使得各个单元输出信 号在时间上相对应， 以便在叠加后可以得到正确的输出信号， 该控制单元 10 还可以包括： 对第一控制信号和第二控制信号进行延时匹配。
具体实现时， 控制单元 10可以为数字信号处理 （DSP， Digital Signal Processing )、 现场可编程门阵列 （FPGA， Field Programmable Gate Array )等 处理芯片或其他具有类似功能的处理单元。
由上可知， 本实施例的快速跟踪电源采用由组合式可控电压源 11为负载 提供电压， 由组合式可控电压源 11与电流检测单元 12串联后， 与跟踪电流源 13并联为负载提供电流， 其中， 由具有高效低精度性质的跟踪电流源 13负责 提供负载电流中的大部分电流以实现对负载电流的高效低频跟踪， 而尽量地 减小组合式可控电压源 11的输出电流（即减小线性放大器 111的输出电流）， 以 降低具有低效高精度性质的线性放大器 111的输出功率，使得因线性放大器 111 输出效率低（因为线性放大器 111是一种低效高精度性质的器件） 而造成的功 率损耗减小， 从而提高快速跟踪电源整体上的变换效率。
与此同时， 通过组合式可控电压源 11中的供电电压切换单元 112对组合式 可控电压源 11中的线性放大器 111的供电电压范围进行调整， 使得线性放大器 111的供电电压范围减小， 也可以减小组合式可控电压源 11的功耗， 而且， 由 于线性放大器 111的供电电压范围减小，所以线性放大器 111还可以实现更高的 跟踪带宽。
总之， 采用该方案， 可以在保证输出高带宽、 高精度的信号的同时， 提 高快速跟踪电源功率放大的整体效率。 实施例三、
根据实施例一和实施例二而所描述的快速跟踪电源， 以下将举例作进一 步详细说明。
参见图 4， 图 4为该快速跟踪电源的一个等效电路， 包括组合式可控电压 源 Al l、 电流检测单元 A12和跟踪电流源 A13;组合式可控电压源 Al l与电流检 测单元 A12串联后， 与跟踪电流源 A13并联。
其中， 组合式可控电压源 Al l相当于图 3中的组合式可控电压源 11， 可以 包括可控电压源 Al l l、 驱动器件、 开关 Sl、 以及三个电压源： VI、 V2和 V3。
其中， 可控电压源 A111相当于图 3中的线性放大器 111， 用于接收从参考 信号中提取的第一控制信号， 根据接收到的第一控制信号为负载 14提供电压。
开关 S1、驱动器件和电压源等器件组成的部分 A112相当于图 3中的供电电 压切换单元 112， 用于接收从参考信号中提取的第二控制信号， 根据接收到的 第二控制信号为可控电压源 Mi l l提供不同的供电电压组合。
其中， 切换可以通过开关 S1来实现， 比如， 当开关 S1连接在电压源 VI上 时， 输出给可控电压源 A111 (即线性放大器 111 ) 的电压值为 VI， 而当开关 S1连接在电压源 V2上时， 输出给可控电压源 A111的电压值为 V2， 等等。 该开 关 S 1具体可以为高速 MOSFET或三极管等器件。
当然， 为了驱动开关 S1进行切换， 还需要有相应的驱动器件， 例如， 参 见图 4中的驱动器件， 该驱动器件主要用于接收第二控制信号， 根据接收到的 " O Q " 第二控制信号选择电压源， 并驱动开关 SI进行切换。 根据实际应用情况， 驱 动器件可以采用自举驱动器件或隔离驱动器件。
电流检测单元 A12， 相当于图 3中的电流检测单元 12， 用于检测组合式可 控电压源 Al l的输出电流 "Il-Io"，根据检测的情况输出第三控制信号； 例如， 当检测到组合式可控电压源 11的输出电流 "Il-Io" 变大时， 则输出指示增加 跟踪电流源 13的输出电流 II的第三控制信号； 当检测到组合式可控电压源 11 的输出电流 "II -Io" 变小时， 则输出指示减 ' j、跟踪电流源 13的输出电流 11的第 三控制信号；
跟踪电流源 A13， 相当于图 3中的跟踪电流源 13， 用于接收电流检测单元 12输出的第三控制信号， 根据第三控制信号调整跟踪电流源 13的输出电流 II， 以实现对负载电流 Io的高效低频跟踪； 例如，如果接收到的第三控制信号指示 增加跟踪电流源 13的输出电流 II， 则提高跟踪电流源 13的输出电流 II； 如果接 收到的第三控制信号指示减小跟踪电流源 13的输出电流 II，则减小跟踪电流源 13的输出电流 II。
当然， 在该快速跟踪电源的电路中， 还可以包括控制单元 10， 具体可参 见实施例二， 在此不再赘述。
另夕卜， 需说明的， 在本实施例中， 仅仅以三个电压源进行切换为例进行 说明， 在实际应用中， 可以根据实际需要对电压源的数量， 以及开关的数量 进行调整。
由上可知，本实施例的快速跟踪电源采用由组合式可控电压源 Al l为负载 提供电压， 由组合式可控电压源 All与电流检测单元 A12串联后， 与跟踪电流 源 A13并联为负载提供电流， 其中， 由具有高效低精度性质的第一跟踪电流源 A13负责提供负载电流中的大部分电流以实现对负载电流的高效低频跟踪，而 尽量地减小可控电压源 Al 11的输出电流， 以降低具有低效高精度性质的可控 电压源 A111的输出功率， 使得因可控电压源 A111输出效率低而造成的功率损 耗减小， 从而提高快速跟踪电源整体上的变换效率。
与此同时， 通过驱动器件和开关 S1等器件对可控电压源 A111的供电电压 范围进行调整， 使得可控电压源 A111的供电电压范围减小， 也可以减小组合 式可控电压源 All的功耗， 而且， 由于可控电压源 A111的供电电压范围减小， 所以可控电压源 A111还可以实现更高的跟踪带宽。 总之， 采用该方案， 可以在保证输出高带宽、 高精度的信号的同时， 提 高快速跟踪电源功率放大的整体效率。 实施例四、
在本实施例中， 将以该快速跟踪电源的另一个等效电路为例进行说明。 参见图 5， 图 5为快速跟踪电源的另一个等效电路， 包括控制器 B10、 组合 式可控电压源 Bl l、 电流检测单元 B12和开关艮踪电流源 B13 ; 组合式可控电 压源 B11与电流检测单元 B12串联后， 与跟踪电流源 B13并联。 其中， 组合式 可控电压源 Bl l， 相当于组合式可控电压源 11， 用于控制输出电压并提供给负 载； 该组合式可控电压源 B11可以包括线性放大器 Bi l l和供电电压切换单元 B112。
控制器 B10， 相当于图 3中的控制单元 10， 用于接收参考信号， 根据参考 信号向供电电压切换单元 112输出第一控制信号， 向线性放大器 111输出第二 控制信号。 这里的参考信号为经过包络检测器检测后的包络信号， 该包络信 号可以是模拟信号， 也可以为包络检测器进行数字化后的数字信号。 控制器 B10在对参考信号进行处理的过程中，还需要对处理后得到的第一控制信号和 第二控制信号进行延时匹配， 使得各个单元输出的信号在同一时刻进行信号 叠加后， 可以得到正确的输出信号。
线性放大器 Bi l l , 相当于图 3中的线性放大器 111， 用于接收控制器 B10 发送的第一控制信号， 根据接收到的第一控制信号为负载 14提供电压； 线性 放大器 111可以采用 Push-Pull结构的放大器， 根据实际要求可以但不限于采用 Class A, Class B、 Class AB类型的线性放大器， 为提高跟踪精度， 线性放大 器 111还可以采用输出反馈控制， 参见图 5。
供电电压切换单元 B112， 相当于图 3中的供电电压切换单元 112， 用于接 收控制器 B10发送的第二控制信号，根据接收到的第二控制信号为线性放大器 Bi l l提供正供电电压轨供电电平 VCC;
电流检测单元 B12， 相当于图 3中的电流检测单元 12， 用于检测组合式可 控电压源 B11的输出电流， 根据检测的情况输出第三控制信号； 例如， 当检测 到组合式可控电压源 11的输出电流变大时， 则输出指示增加跟踪电流源 13的 输出电流的第三控制信号； 当检测到组合式可控电压源 11的输出电流变小时， 则输出指示减小跟踪电流源 13的输出电流的第三控制信号；
跟踪电流源 B13， 相当于图 3中的跟踪电流源 13， 用于接收电流检测单元 B 12输出的第三控制信号，根据第三控制信号调整跟踪电流源 B 13的输出电流， 以实现对负载电流的高效低频跟踪。 例如， 如果接收到的第三控制信号指示 增加跟踪电流源 13的输出电流， 则提高跟踪电流源 13的输出电流； 如果接收 到的第三控制信号指示减小跟踪电流源 13的输出电流， 则减小跟踪电流源 13 的输出电流。
其中，供电电压切换单元 B112可以包括多路由电压源、二级管、 MOSFET、 驱动器件组成的供电电压切换支路， 每个供电电压切换支路都有不同的电压 源。
例如， 参见图 5， 该供电电压切换单元 B112共有 3种正供电电压轨供电电 平 Vccl、 Vcc2和 Vcc3， 每个正供电电压轨供电电平分别对应着一个供电电压 切换支路， 为了防止不同电平直通， 每个供电电压切换支路上都具有一个二 极管， 可参见图 5中的 Dl、 D2和 D3， 这些二极管用于提供反向阻止的功能； 另夕卜， 每个供电电压切换支路上还各串联着一个 MOSFET， 比如图 5中的 Ml、 M2和 M3， 这些 MOSFET相当于开关管， 用于通过第二控制信号在正供电电压 轨供电电平 Vccl〜 Vcc3中选择合适的电平供给线性放大器 Bl 11； 为了给 MOSFET提供驱动， 每个 MOSFET还对应着一个驱动器件， 比如， Ml对应着 驱动器件 DRV1， M2对应着驱动器件 DRV2， M3对应着驱动器件 DRV3， 这些 驱动器件具体可以为自举驱动器件或隔离驱动器件。
开关跟踪电流源 B13， 则可以由单路无输出电容的 buck电路组成， 用于通 过第三控制信号控制开关管 M4的开闭来改变电感 L1中的电流实现控制跟踪 电流源 B13的输出电流， 以实现对负载电流的高效低频跟踪。
开关跟踪电流源 B13中还可以包括二极管 D4和驱动器件 DRV4;
二极管 D4与开关管 M4并联， 用于在开关管 M4截止时， 提供电感电流续 流通路。
驱动器件 DRV4， 用于根据第三控制信号为开关管 M4提供驱动。
可选的， 开关跟踪电流源 B13中还可以包括调制 /控制器 B131， 该调制 /控 ...11... 制器 B131与驱动器件 DRV4串联， 用于对接收到的第三控制信号进行调制控 制。
在本发明实施例中， 由于线性放大器的输入信号均为模拟信号， 所以如 果接收的第一控制信号是个数字信号的话， 则需要进行数模（D/A， Digital /Analog )转换， 将其转化为模拟信号， 因此， 该快速追踪电源还可以包括 D/A 转换单元 B15;
D/A转换单元 B15， 用于对接收到的第一控制信号由数字信号转换为模拟 信号， 然后传送给线性放大器 B111。
通过对不同电压源的切换选择，可以使得电路输出阶梯状电压 Vcc为线性 放大器 Bi l l供电， 即将输出的电压作为线性放大器 Bi l l的漏极电压。
参见图 6， 供电电压切换单元 B112输出的电压 Vcc如曲线 1002所示， 组合 式可控电压源 B 11输出电压波形如曲线 1001所示， 线性放大器 B 111的 Vss电压 (即负极电压， 具体可参见现有技术）如曲线 1003所示， 可见， 通过供电电 压切换单元 B112对电压源的切换， 可以动态减少线性放大器 Bi l l的供电电压 范围， 即减小 Vcc-Vss的值， 而且， 由于在该快速跟踪电源中， 主要由跟踪电 流源 B13来负责提供负载电流中的大部分电流以实现对负载电流的高效低频 跟踪，而线性放大器 Bi l l的输出电流则非常小，所以可以减少线性放大器 Bi l l 的输出功率， 即减少因线性放大器 Bi l l输出效率低而造成的功率损耗， 从而 实现提高快速跟踪电源整体上的变换效率的目标。
例如， 参见图 7， 当参考信号为正弦波时， ¾殳负载为阻型负载， 则负载 电流可以如曲线 10010所示， 艮踪电流源 B 13的输出电流可以如曲线 10011所 示， 组合式可控电压源 B11的输出电流如曲线 10012所示， 可见， 跟踪电流源 B13的输出电流可以实现了对负载电流的高效低频跟踪，而且组合式可控电压 源 B11的输出电流（即线性放大器 Bi l l的输出电流）也较小， 所以， 采用该方 案可以提高整个装置的变换效率。
另外， 由于线性放大器 Bi l l的供电电压范围减小， 所以线性放大器 Bi l l 还可以实现更高的跟踪带宽。
实施例五、
在上述实施例的基础上，还可以根据应用场景的需要同时调整 Vcc及 Vss， 即供电电压切换单元 112在接收到第二控制信号后， 可以根据第二控制信号同 时控制 Vcc和 Vss的值。
例如， 参见图 8， 在该快速跟踪电源中， 提供 Vccl、 Vcc2、 Vssl和 Vss2 四个电压值， 即一共为线性放大器 111提供四个电压范围： "Vccl- Vssl" 、 "Vccl- Vss2" 、 "Vcc2- Vssl" 和 "Vcc2- Vss2，， ； 其中， Vccl和 Vcc2由驱 动器件 DRV5和开关 S5控制， Vssl和 Vss2由驱动器件 DRV6和开关 S6控制， 比 如，当第二控制信号控制驱动器件 DRV5开启开关 S5，同时控制驱动器件 DRV6 开启开关 S6时， Vccl所在的供电电压切换支路和 Vssl所在的供电电压切换支 路均变为通路， 则此时， 线性放大器 111的电压范围为 "Vccl- Vssl" ； 当第 二控制信号控制驱动器件 DRV5关闭开关 S5， 同时控制驱动器件 DRV6开启开 关 S6时， Vcc2所在的供电电压切换支路和 Vssl所在的供电电压切换支路均变 为通路， 则此时， 线性放大器 111的电压范围为 "Vcc2- Vssl" ， 依次类推， 等等。 当然， 为了防止不同电压直通， 每个供电电压切换支路上还各包括有 一个二极管， 参见图 8中的 D5、 D6、 D7和 D8。
参见图 9， 组合式可控电压源 11输出电压波形如曲线 2001所示， 供电电压 切换单元 112提供的 Vcc电压如曲线 2002所示， 供电电压切换单元 112提供的 Vss电压如曲线 2003所示。
综上可见， 通过供电电压切换单元 112同时对 Vcc和 Vss的切换， 可以动态 减少线性放大器 111的供电电压范围， 即减小 Vcc-Vss的值， 实现减少线性放 大器输出功率， 提高装置的变换效率的目的， 而且， 由于线性放大器 111的供 电电压范围减小， 所以线性放大器 111还可以实现更高的跟踪带宽。
需要说明的是， 上述供电电压切换单元 112的组成形式并不唯一， 实际应 用中也可以通过其他类似的功能电路或具有相应功能的集成器件来完成， 例 如 MOSFET也可以用三极管等器件来代替， 在此并不限定。 另外， 电压源的 数量也可以根据实际应用的需要进行调整， 即在实际应用中， 也可以采用多 个电压源及多路切换电路切换实现更多电压轨的切换。 实施例六、
相应的， 本发明实施例还提供一种通信系统， 如图 10所示， 该通信系统 包括包络检测器 601、 驱动放大器 603、 射频功率放大器 604和本发明实施例所 提供的任一种快速跟踪电源 602。
包络检测器 601，用于对射频信号进行检测，从射频信号中提取包络信号， 并将提取到的包络信号作为参考信号提供给快速跟踪电源 602。
快速跟踪电源 602， 用于接收包络检测器 601所提取的包络信号，根据包 络信号为射频功率放大器 604提供漏极电压和电流； 具体可参见前面实施例， 在此不再赘述。
驱动放大器 603， 用于接收射频信号， 并对所述射频信号进行驱动放大。 射频功率放大器 604，用于接收驱动放大器 603驱动放大后的射频信号进 行放大。
如图 11所示， 该通信系统还可以包括发射处理单元 605。
发射处理单元 605，用于对射频功率放大器 604放大后的射频信号进行处 理。
如图 11所示， 该通信系统还可以包括信号处理单元 606。
信号处理单元 606， 用于对射频信号进行处理， 并发送给包络检测器 601 和驱动放大器 603。
由前面的各个实施例可知， 该通信系统中的快速跟踪电源 602采用由跟踪 电流源 13为射频功率放大器 604提供大部分电流， 从而实现对射频功率放大器 604的电流的高效低频跟踪， 与此同时， 采用由组合式可控电压源 11控制射频 功率放大器 604的漏极电压， 并通过调整线性放大器 111的供电电压范围来降 低具有低效高精度性质的线性放大器 111的输出功率， 使得因线性放大器 111 输出效率低而造成的功率损耗减小， 从而提高快速跟踪电源整体上的变换效 率， 而且， 由于线性放大器 111的供电电压范围减小， 所以线性放大器 111还可 以实现更高的跟踪带宽。 由于快速跟踪电源 602的整体效率提高了， 所以， 该 通信系统的效率自然得到提高。 实施例七、
相应地， 本发明实施例还提供一种快速跟踪电源的控制方法， 参见图 11， 具体流程如下：
701、 接收从参考信号中提取的第二控制信号， 根据第二控制信号为组合 式可控电压源中的线性放大器提供不同的供电电压组合；
这样的话， 线性放大器 111 的供电电压范围就无需覆盖整个电压范围， 而是保持在一个较小的供电电压范围内， 由于线性放大器的电流本来就较小， 所以如果覆盖的供电电压范围减小的话， 该线性放大器所消耗的功率也会减 少， 即组合式可控电压源的功耗减少。
702、接收从参考信号中提取的第一控制信号，在所述电压组合的作用下， 根据接收到的第一控制信号控制负载电压；
703、 检测组合式可控电压源的输出电流， 根据检测的情况输出第三控制 信号；
例如， 检测组合式可控电压源的输出电流， 当检测到组合式可控电压源 的输出电流变大时， 输出指示增加跟踪电流源的输出电流的第三控制信号； 当检测到组合式可控电压源的输出电流变小时， 输出指示减小跟踪电流源的 输出电流的第三控制信号；
704、 根据第三控制信号调整跟踪电流源的输出电流， 以实现对负载电流 的高效低频跟踪。
例如， 在接收到指示增加跟踪电流源的输出电流的第三控制信号时， 提 高跟踪电流源的输出电流， 在接收到指示减小跟踪电流源的输出电流的第三 控制信号时， 减小跟踪电流源的输出电流。
可选的， 在步骤 701 之前， 该快速跟踪电源的控制方法还可以包括步骤 705和 706;
705、 接收参考信号； 该作为参考信号的包络信号具体可以为模拟信号， 也可以为数字信号。
需说明的是， 由于线性放大器的输入信号类型为模拟信号， 所以， 如果 数字信号， 还需要将数字信号转换为模拟信号。
706、 根据接收到的参考信号输出第一控制信号和第二控制信号。
可选的， 为了使得各个单元输出信号在时间上相对应， 以便在叠加后可 以得到正确的输出信号， 还可以对第一控制信号和第二控制信号进行延时匹 配。
以上各个步骤具体可参见前面实施例， 在此不再赘述。
由上可知， 本实施例采用根据第三控制信号控制具有高效低精度性质的 跟踪电流源为负载提供大部分电流， 来实现对负载电流的高效低频跟踪， 与 此同时， 根据第一控制信号控制组合式可控电压源为负载提供电压， 并根据 第二控制信号通过调整线性放大器的供电电压范围来降低具有低效高精度性 质的线性放大器的输出功率， 使得因线性放大器输出效率低而造成的功率损 耗减小， 从而提高快速跟踪电源整体上的变换效率。 而且， 由于线性放大器 的供电电压范围减小， 所以还可以实现更高的跟踪带宽。
总之， 采用该方案， 可以在保证输出高带宽、 高精度的信号的同时， 提 高快速跟踪电源功率放大的整体效率。 本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成， 该程序可以存储于一计算机可 读存储介质中，存储介质可以包括： 只读存储器（ROM， Read Only Memory ), 随机存取 i己忆体 ( RAM, Random Access Memory)、 磁盘或光盘等。
以上对本发明实施例所提供的快速跟踪电源的控制方法、 快速跟踪电源
进行了阐述， 以上实施例的说明只是用于帮助理解本发明的方法及其核心思 想； 同时， 对于本领域的一般技术人员， 依据本发明的思想， 在具体实施方 式及应用范围上均会有改变之处， 综上所述， 本说明书内容不应理解为对本 发明的限制。
+

Claims

— 1 Q... 权利 要求 书
1、 一种快速跟踪电源， 其特征在于， 包括组合式可控电压源、 电流检测单 元和跟踪电流源， 其中， 组合式可控电压源包括线性放大器和供电电压切换单 元；
线性放大器， 用于接收从参考信号中提取的第一控制信号， 根据接收到的 第一控制信号控制负载电压；
供电电压切换单元， 用于接收从参考信号中提取的第二控制信号， 根据接 收到的第二控制信号为所述线性放大器提供不同的供电电压组合；
电流检测单元， 用于检测组合式可控电压源的输出电流， 根据检测的情况 输出第三控制信号；
跟踪电流源， 用于接收电流检测单元输出的第三控制信号， 根据第三控制 信号调整跟踪电流源的输出电流， 以实现对负载电流的低频跟踪；
组合式可控电压源与电流检测单元串联后， 与跟踪电流源并联为负载提供 电流。
2、 根据权利要求 1所述的快速跟踪电源， 其特征在于， 所述供电电压切换 单元包括电平选择支路和至少两个具有不同电压值的电压源；
所述电压源， 用于提供电压；
所述电平选择支路， 用于接收第二控制信号， 根据接收到的第二控制信号 选择电压源， 以便为所述线性放大器提供供电电压。
3、 根据权利要求 2所述的快速跟踪电源， 其特征在于， 所述电平选择支路 包括驱动器件、 开关器件和二极管；
所述驱动器件， 用于接收第二控制信号， 根据接收到的第二控制信号选择 电压源， 并驱动开关器件进行切换；
所述开关器件， 用于在电压源之间进行切换；
所述二极管， 用于防止具有不同电压直通， 提供反向阻止。
4、 根据权利要求 1所述的快速跟踪电源， 其特征在于，
所述电流检测单元， 具体用于检测组合式可控电压源的输出电流， 当检测 到组合式可控电压源的输出电流变大时， 输出指示增加跟踪电流源的输出电流 的第三控制信号； 当检测到组合式可控电压源的输出电流变小时， 输出指示减 小跟踪电流源的输出电流的第三控制信号； 则所述跟踪电流源， 具体用于在接收到电流检测单元输出的指示增加跟踪 电流源的输出电流的第三控制信号时， 提高跟踪电流源的输出电流， 在接收到 电流检测单元输出的指示减小跟踪电流源的输出电流的第三控制信号时， 减小 跟踪电流源的输出电流。
5、 根据权利要求 1所述的快速跟踪电源， 其特征在于，
所述跟踪电流源由降压式 BUCK电路、 或升压式 BOOST电路、 或降压或 升压式 BUCK-BOOST电路、 或斩波 CUK电路组成。
6、 根据权利要求 1至 5中任一项所述的快速跟踪电源， 其特征在于， 还包 括控制单元；
所述控制单元， 用于接收参考信号， 根据所述参考信号向供电电压切换单 元输出第一控制信号， 向线性放大器输出第二控制信号。
7、 根据权利要求 5所述的快速跟踪电源， 其特征在于，
所述控制单元， 还用于对第一控制信号和第二控制信号进行延时匹配。
8、 一种通信系统， 其特征在于， 包括包络检测器、 驱动放大器、 射频功率 放大器和权利要求 1至 7中所述的任一种快速跟踪电源；
所述包络检测器， 用于对射频信号进行检测， 从所述射频信号中提取包络 信号， 并将所述包络信号作为参考信号提供给快速跟踪电源；
所述快速跟踪电源， 用于接收包络检测器所提取的包络信号， 根据所述包 络信号为射频功率放大器提供漏极电压和电流；
所述驱动放大器， 用于接收射频信号， 并对所述射频信号进行驱动放大； 所述射频功率放大器， 用于接收驱动放大器驱动放大后的射频信号进行放 大。
9、 根据权利要求 8所述的通信系统， 其特征在于， 还包括发射处理单元； 所述发射处理单元， 用于对所述射频功率放大器放大后的射频信号进行处 理。
10、 一种快速跟踪电源的控制方法， 其特征在于， 包括：
接收从参考信号中提取的第二控制信号， 根据第二控制信号为组合式可控 电压源中的线性放大器提供不同的供电电压组合；
接收从参考信号中提取的第一控制信号， 在所述电压组合的作用下， 根据 接收到的第一控制信号为负载提供电压；
检测组合式可控电压源的输出电流， 根据检测的情况输出第三控制信号； 根据第三控制信号调整跟踪电流源的输出电流， 以实现对负载电流的低频 跟踪。
11、 根据权利要求 10所述的快速跟踪电源的控制方法， 其特征在于， 所述检测组合式可控电压源的输出电流， 根据检测的情况输出第三控制信 号具体为： 检测组合式可控电压源的输出电流， 当检测到组合式可控电压源的 输出电流变大时， 输出指示增加跟踪电流源的输出电流的第三控制信号； 当检 测到组合式可控电压源的输出电流变小时， 输出指示减小跟踪电流源的输出电 流的第三控制信号；
所述根据第三控制信号调整跟踪电流源的输出电流具体为： 在接收到指示 增加跟踪电流源的输出电流的第三控制信号时， 提高跟踪电流源的输出电流， 在接收到指示减小跟踪电流源的输出电流的第三控制信号时， 减小跟踪电流源 的输出电流。
12、 根据权利要求 10或 11所述的快速跟踪电源的控制方法， 其特征在于， 还包括：
接收参考信号；
根据所述参考信号输出第一控制信号和第二控制信号。
13、 根据权利要求 10或 11所述的快速跟踪电源的控制方法， 其特征在于， 还包括：
对所述第一控制信号和第二控制信号进行延时匹配。
+
PCT/CN2011/071365 2010-05-31 2011-02-28 快速跟踪电源的控制方法、快速跟踪电源及系统 WO2011150703A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11789082.2A EP2579456B1 (en) 2010-05-31 2011-02-28 Control method for fast tracking power source, fast tracking power source and system
EP19192009.9A EP3661051A1 (en) 2010-05-31 2011-02-28 Method for controlling fast tracking power supply, fast tracking power supply, and system
ES11789082T ES2765647T3 (es) 2010-05-31 2011-02-28 Método de control para una fuente de alimentación de seguimiento rápido, sistema y fuente de alimentación de seguimiento rápido
US13/686,676 US8897724B2 (en) 2010-05-31 2012-11-27 Method for controlling fast tracking power supply, fast tracking power supply, and system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010188621.9 2010-05-31
CN2010101886219A CN101867284B (zh) 2010-05-31 2010-05-31 快速跟踪电源的控制方法、快速跟踪电源及系统

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/686,676 Continuation US8897724B2 (en) 2010-05-31 2012-11-27 Method for controlling fast tracking power supply, fast tracking power supply, and system

Publications (1)

Publication Number Publication Date
WO2011150703A1 true WO2011150703A1 (zh) 2011-12-08

Family

ID=42958877

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/071365 WO2011150703A1 (zh) 2010-05-31 2011-02-28 快速跟踪电源的控制方法、快速跟踪电源及系统

Country Status (5)

Country Link
US (1) US8897724B2 (zh)
EP (2) EP2579456B1 (zh)
CN (1) CN101867284B (zh)
ES (1) ES2765647T3 (zh)
WO (1) WO2011150703A1 (zh)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9112452B1 (en) 2009-07-14 2015-08-18 Rf Micro Devices, Inc. High-efficiency power supply for a modulated load
EP2561611B1 (en) 2010-04-19 2015-01-14 RF Micro Devices, Inc. Pseudo-envelope following power management system
US9099961B2 (en) 2010-04-19 2015-08-04 Rf Micro Devices, Inc. Output impedance compensation of a pseudo-envelope follower power management system
US9431974B2 (en) 2010-04-19 2016-08-30 Qorvo Us, Inc. Pseudo-envelope following feedback delay compensation
CN101867284B (zh) * 2010-05-31 2012-11-21 华为技术有限公司 快速跟踪电源的控制方法、快速跟踪电源及系统
WO2012047738A1 (en) 2010-09-29 2012-04-12 Rf Micro Devices, Inc. SINGLE μC-BUCKBOOST CONVERTER WITH MULTIPLE REGULATED SUPPLY OUTPUTS
US8782107B2 (en) 2010-11-16 2014-07-15 Rf Micro Devices, Inc. Digital fast CORDIC for envelope tracking generation
CN102075149B (zh) * 2010-12-03 2013-01-23 哈尔滨工业大学深圳研究生院 多相交错并联射频功率放大器功率包络跟踪电源
EP2649724B1 (en) * 2010-12-09 2015-01-21 RF Micro Devices, Inc. Pseudo-envelope follower power management system with high frequency ripple current compensation
US9379667B2 (en) 2011-05-05 2016-06-28 Rf Micro Devices, Inc. Multiple power supply input parallel amplifier based envelope tracking
US9246460B2 (en) 2011-05-05 2016-01-26 Rf Micro Devices, Inc. Power management architecture for modulated and constant supply operation
US9247496B2 (en) 2011-05-05 2016-01-26 Rf Micro Devices, Inc. Power loop control based envelope tracking
EP2709272A4 (en) * 2011-05-13 2014-12-17 Nec Corp POWER SUPPLY DEVICE, ITS OPERATING METHOD, AND TRANSMISSION DEVICE USING THE POWER SUPPLY DEVICE
EP2715945B1 (en) 2011-05-31 2017-02-01 Qorvo US, Inc. Rugged iq receiver based rf gain measurements
US8698558B2 (en) 2011-06-23 2014-04-15 Qualcomm Incorporated Low-voltage power-efficient envelope tracker
US9263996B2 (en) 2011-07-20 2016-02-16 Rf Micro Devices, Inc. Quasi iso-gain supply voltage function for envelope tracking systems
KR101786587B1 (ko) * 2011-10-14 2017-10-19 삼성전자주식회사 전력 증폭기의 전압을 생성하기 위한 장치 및 방법
WO2013063364A1 (en) 2011-10-26 2013-05-02 Rf Micro Devices, Inc. Average frequency control of switcher for envelope tracking
US9484797B2 (en) 2011-10-26 2016-11-01 Qorvo Us, Inc. RF switching converter with ripple correction
US9024688B2 (en) 2011-10-26 2015-05-05 Rf Micro Devices, Inc. Dual parallel amplifier based DC-DC converter
US9515621B2 (en) 2011-11-30 2016-12-06 Qorvo Us, Inc. Multimode RF amplifier system
US9250643B2 (en) 2011-11-30 2016-02-02 Rf Micro Devices, Inc. Using a switching signal delay to reduce noise from a switching power supply
US9041365B2 (en) 2011-12-01 2015-05-26 Rf Micro Devices, Inc. Multiple mode RF power converter
US9280163B2 (en) 2011-12-01 2016-03-08 Rf Micro Devices, Inc. Average power tracking controller
WO2013082384A1 (en) 2011-12-01 2013-06-06 Rf Micro Devices, Inc. Rf power converter
US9256234B2 (en) 2011-12-01 2016-02-09 Rf Micro Devices, Inc. Voltage offset loop for a switching controller
US9494962B2 (en) 2011-12-02 2016-11-15 Rf Micro Devices, Inc. Phase reconfigurable switching power supply
US9813036B2 (en) 2011-12-16 2017-11-07 Qorvo Us, Inc. Dynamic loadline power amplifier with baseband linearization
US9298198B2 (en) 2011-12-28 2016-03-29 Rf Micro Devices, Inc. Noise reduction for envelope tracking
CN102624339B (zh) * 2012-04-10 2014-10-15 南京航空航天大学 一种串联结构包络线跟踪电源及其控制系统
US9020451B2 (en) 2012-07-26 2015-04-28 Rf Micro Devices, Inc. Programmable RF notch filter for envelope tracking
US9112409B2 (en) * 2012-08-10 2015-08-18 Texas Instruments Incorporated Switched mode assisted linear regulator with dynamic buck turn-off using ZCD-controlled tub switching
US9473023B2 (en) 2012-08-10 2016-10-18 Texas Instruments Incorporated Switched mode assisted linear regulator with seamless transition between power tracking configurations
US9276475B2 (en) * 2012-08-10 2016-03-01 Texas Instruments Incorporated Switched mode assisted linear regulator with decoupled output impedance and signal path bandwidth
EP2704319B1 (en) * 2012-08-28 2017-03-01 Samsung Electronics Co., Ltd Audio device and output method thereof
US9225231B2 (en) 2012-09-14 2015-12-29 Rf Micro Devices, Inc. Open loop ripple cancellation circuit in a DC-DC converter
US9197256B2 (en) 2012-10-08 2015-11-24 Rf Micro Devices, Inc. Reducing effects of RF mixer-based artifact using pre-distortion of an envelope power supply signal
WO2014062902A1 (en) 2012-10-18 2014-04-24 Rf Micro Devices, Inc Transitioning from envelope tracking to average power tracking
US9627975B2 (en) 2012-11-16 2017-04-18 Qorvo Us, Inc. Modulated power supply system and method with automatic transition between buck and boost modes
US9929696B2 (en) 2013-01-24 2018-03-27 Qorvo Us, Inc. Communications based adjustments of an offset capacitive voltage
US9059793B2 (en) 2013-01-28 2015-06-16 Qualcomm Incorporated Noise shaping for switching circuitry
US9178472B2 (en) 2013-02-08 2015-11-03 Rf Micro Devices, Inc. Bi-directional power supply signal based linear amplifier
US9608675B2 (en) 2013-02-11 2017-03-28 Qualcomm Incorporated Power tracker for multiple transmit signals sent simultaneously
US9146263B2 (en) 2013-03-07 2015-09-29 Texas Instruments Incorporated Electronic device and method for tracking energy consumption
US20140266448A1 (en) * 2013-03-14 2014-09-18 Qualcomm Incorporated Adapative power amplifier
US9203353B2 (en) 2013-03-14 2015-12-01 Rf Micro Devices, Inc. Noise conversion gain limited RF power amplifier
WO2014152903A2 (en) 2013-03-14 2014-09-25 Rf Micro Devices, Inc Envelope tracking power supply voltage dynamic range reduction
US9479118B2 (en) 2013-04-16 2016-10-25 Rf Micro Devices, Inc. Dual instantaneous envelope tracking
WO2015010328A1 (en) * 2013-07-26 2015-01-29 Nokia Siemens Networks Oy Method, apparatus and system for envelope tracking
US9374005B2 (en) 2013-08-13 2016-06-21 Rf Micro Devices, Inc. Expanded range DC-DC converter
US9614476B2 (en) 2014-07-01 2017-04-04 Qorvo Us, Inc. Group delay calibration of RF envelope tracking
JP6501322B2 (ja) * 2014-08-11 2019-04-17 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． 電力増幅器、リモート無線ユニット、及び基地局
CN104503762A (zh) * 2014-12-30 2015-04-08 小米科技有限责任公司 识别电子配件的装置及方法
EP3059858A1 (en) * 2015-02-23 2016-08-24 Nokia Technologies OY Method and apparatus for supplying power to an amplifier
CN104850210B (zh) * 2015-04-30 2017-12-01 华为技术有限公司 一种电源门控电路
US9912297B2 (en) 2015-07-01 2018-03-06 Qorvo Us, Inc. Envelope tracking power converter circuitry
US9941844B2 (en) 2015-07-01 2018-04-10 Qorvo Us, Inc. Dual-mode envelope tracking power converter circuitry
KR102140191B1 (ko) * 2015-07-14 2020-08-03 삼성전기주식회사 전력 증폭기용 전력 공급 장치
US9973147B2 (en) 2016-05-10 2018-05-15 Qorvo Us, Inc. Envelope tracking power management circuit
CN105896983A (zh) * 2016-05-13 2016-08-24 南京航空航天大学 宽频带输出的包络线跟踪电源
US20180034417A1 (en) * 2016-07-29 2018-02-01 Qualcomm Incorporated Power supply control
CN106452369B (zh) * 2016-09-28 2020-03-17 西安交通大学 基于功率放大器输出信号控制的高效包络跟踪电源及方法
CN107017765A (zh) * 2017-04-01 2017-08-04 唯捷创芯(天津)电子技术股份有限公司 一种具有串并联结构的包络线跟踪电源、芯片及通信终端
US10476437B2 (en) 2018-03-15 2019-11-12 Qorvo Us, Inc. Multimode voltage tracker circuit
CN109217830B (zh) * 2018-11-05 2023-10-31 四川航天神坤科技有限公司 射频功率放大器开关控制电路、射频前端发射链路及接收链路
KR20220102510A (ko) 2021-01-13 2022-07-20 삼성전자주식회사 멀티 레벨의 전원 전압을 출력하는 전원 변조기 및 이의 동작 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5736878A (en) * 1996-06-21 1998-04-07 Delco Electronics Corporaiton Low cost, high speed track and hold circuit
CN101588125A (zh) * 2009-06-23 2009-11-25 华为技术有限公司 电源装置及其控制方法、功率放大装置
CN101867284A (zh) * 2010-05-31 2010-10-20 华为技术有限公司 快速跟踪电源的控制方法、快速跟踪电源及系统

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905407A (en) * 1997-07-30 1999-05-18 Motorola, Inc. High efficiency power amplifier using combined linear and switching techniques with novel feedback system
US7207054B1 (en) * 1999-11-17 2007-04-17 Allegro Microsystems, Inc. Low noise block supply and control voltage regulator
GB2366461B (en) * 2000-08-31 2004-06-23 Element 14 Inc Switched supply for operational amplifier
US6788151B2 (en) * 2002-02-06 2004-09-07 Lucent Technologies Inc. Variable output power supply
GB2398648B (en) * 2003-02-19 2005-11-09 Nujira Ltd Power supply stage for an amplifier
KR100767763B1 (ko) * 2003-09-16 2007-10-17 노키아 코포레이션 폴라 송신기내에 사용되는 하이브리드 스위치드 모드/선형 전력 증폭기 전력 공급원을 구비한 무선 주파수 송신기
US7706467B2 (en) * 2004-12-17 2010-04-27 Andrew Llc Transmitter with an envelope tracking power amplifier utilizing digital predistortion of the signal envelope
US7570931B2 (en) * 2006-06-02 2009-08-04 Crestcom, Inc. RF transmitter with variably biased RF power amplifier and method therefor
US7764055B2 (en) * 2006-07-10 2010-07-27 Skyworks Solutions, Inc. Polar transmitter having a dynamically controlled voltage regulator and method for operating same
CN200944197Y (zh) * 2006-08-29 2007-09-05 深圳市金威源科技有限公司 一种线性稳压电源
FI20065865A0 (fi) * 2006-12-29 2006-12-29 Nokia Corp Usean toimitilan amplitudimodulaattorin ohjausmenetelmä
US7679433B1 (en) * 2007-02-02 2010-03-16 National Semiconductor Corporation Circuit and method for RF power amplifier power regulation and modulation envelope tracking
FI20075322A0 (fi) 2007-05-07 2007-05-07 Nokia Corp Teholähteitä RF-tehovahvistimelle
GB0715254D0 (en) * 2007-08-03 2007-09-12 Wolfson Ltd Amplifier circuit
KR101618119B1 (ko) * 2007-12-24 2016-05-09 삼성전자주식회사 포락선 제거 및 복원 기법 기반의 전력 증폭 장치
US7949316B2 (en) * 2008-01-29 2011-05-24 Panasonic Corporation High-efficiency envelope tracking systems and methods for radio frequency power amplifiers
JP5119961B2 (ja) * 2008-02-08 2013-01-16 住友電気工業株式会社 包絡線追跡電源回路及びそれを含む高周波増幅器
US7808323B2 (en) * 2008-05-23 2010-10-05 Panasonic Corporation High-efficiency envelope tracking systems and methods for radio frequency power amplifiers
US8098093B1 (en) * 2010-01-15 2012-01-17 National Semiconductor Corporation Efficient envelope tracking power supply for radio frequency or other power amplifiers
US8571492B2 (en) * 2010-04-20 2013-10-29 Rf Micro Devices, Inc. DC-DC converter current sensing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5736878A (en) * 1996-06-21 1998-04-07 Delco Electronics Corporaiton Low cost, high speed track and hold circuit
CN101588125A (zh) * 2009-06-23 2009-11-25 华为技术有限公司 电源装置及其控制方法、功率放大装置
CN101867284A (zh) * 2010-05-31 2010-10-20 华为技术有限公司 快速跟踪电源的控制方法、快速跟踪电源及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2579456A4 *

Also Published As

Publication number Publication date
CN101867284B (zh) 2012-11-21
CN101867284A (zh) 2010-10-20
EP3661051A1 (en) 2020-06-03
US8897724B2 (en) 2014-11-25
US20130078939A1 (en) 2013-03-28
EP2579456A4 (en) 2013-04-10
EP2579456A1 (en) 2013-04-10
ES2765647T3 (es) 2020-06-10
EP2579456B1 (en) 2019-10-23

Similar Documents

Publication Publication Date Title
WO2011150703A1 (zh) 快速跟踪电源的控制方法、快速跟踪电源及系统
JP5469257B2 (ja) 集積回路、無線通信ユニット及び電源を供給する方法
US9768730B2 (en) Amplification of a radio frequency signal
US9425744B2 (en) Multi mode bias modulator operating in envelope tracking mode or average power tracking mode and envelope tracking power amplifier using the same
US8942652B2 (en) Split VCC and common VCC power management architecture for envelope tracking
US8253487B2 (en) Tracking power supply, method for controlling power supply, and communication apparatus
US9178472B2 (en) Bi-directional power supply signal based linear amplifier
KR101687459B1 (ko) 저전압 전력 효율적인 엔벨로프 추적기
US8233860B2 (en) Power amplification apparatus for envelope modulation of high frequency signal and method for controlling the same
US7915961B1 (en) Power amplifier multiple stage control for polar modulation circuit
US9559637B2 (en) Multi-mode bias modulator and envelope tracking power amplifier using the same
US7928799B2 (en) Power amplifying apparatus and mobile communication terminal
US20200127612A1 (en) Voltage generation circuit and related envelope tracking amplifier apparatus
US8976543B1 (en) Full bridge power supply with digital feedback
WO2018132208A1 (en) Efficient wideband envelope tracking power amplifier
Sahu et al. Adaptive Power Management of Linear RF Power Amplifiers in Mobile Handsets—An Integrated System Design Approach
JP2014187793A (ja) 電源装置および半導体集積回路装置
CN102142768A (zh) 一种快速跟踪电源装置、控制方法及通信设备
US20120142304A1 (en) Power Amplifiers for Wireless Systems
WO2011003341A1 (zh) 一种降低手机射频功耗的电路及方法
US20050057308A1 (en) Method and apparatus for dynamically regulating the supply voltage of a power amplifier
US8981851B2 (en) Power supply modulator and method for controlling same
WO2018023215A1 (zh) 包络调制器、包络跟踪功率放大器及通信设备
WO2019236009A1 (en) Supply modulator, power amplifier having the same, method for controlling the same, and method for controlling the power amplifier
Chowdhury et al. 2.2 A fully integrated reconfigurable wideband envelope-tracking SoC for high-bandwidth WLAN applications in a 28nm CMOS technology

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11789082

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011789082

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE