WO2019169929A1 - 一种线路驱动装置 - Google Patents

一种线路驱动装置 Download PDF

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Publication number
WO2019169929A1
WO2019169929A1 PCT/CN2018/122171 CN2018122171W WO2019169929A1 WO 2019169929 A1 WO2019169929 A1 WO 2019169929A1 CN 2018122171 W CN2018122171 W CN 2018122171W WO 2019169929 A1 WO2019169929 A1 WO 2019169929A1
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WIPO (PCT)
Prior art keywords
signal
module
voltage
output
power supply
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PCT/CN2018/122171
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English (en)
French (fr)
Inventor
赵治磊
李东
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华为技术有限公司
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Priority to EP18908681.2A priority Critical patent/EP3737051B1/en
Publication of WO2019169929A1 publication Critical patent/WO2019169929A1/zh

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    • 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
    • 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
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/026—Arrangements for coupling transmitters, receivers or transceivers to transmission lines; Line drivers
    • 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
    • H03F2200/435—A peak detection being used in a signal measuring circuit in a controlling circuit of an amplifier
    • 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 application relates to the field of communications technologies, and in particular, to a line driving device.
  • x digital subscriber line (xDSL) communication devices typically include a digital front end (DFE), an analog front end (AFE), and a line driver (LD). ) and hybrid circuits.
  • the DFE is used for digital signal processing of the signal input to the external device by the DFE, and realizes the function of the xDSL protocol.
  • the AFE is used for digital-to-analog conversion of the signal of the DEF input AFE, and analog-to-digital conversion of the signal input to the AFE of the hybrid circuit.
  • the LD is used for power amplification of the signal input from the AFE to the LD.
  • the hybrid circuit is used to separate the signal output from the LD and the signal input from the external device to the hybrid circuit, and couple the signal output from the LD to the transmission cable for transmission, and input the external device. The signal to the hybrid circuit is sent to the AFE.
  • the line driver is the last stage power transmission unit of the xDSL communication device, and its transmission power and performance directly determine the link quality and transmission distance of the communication system. Since the xDSL communication system adopts an orthogonal frequency-division multiplexing (OFDM) modulation method, the number of bits of the bearer data is relatively high (15 bits), and the peak-to-average ratio of the output signal of the line driver is generally 16 dB (ie, the line driver) The peak value of the output signal is about 6.3 times its effective value. Therefore, the power supply of the line driver must be large enough to meet the amplification requirement of the peak signal in the input signal of the line driver to ensure that the output signal of the line driver is not distorted.
  • OFDM orthogonal frequency-division multiplexing
  • the charge pump is mainly used to supply power to the line driver.
  • the input signal of the line driver is greater than or equal to the set value
  • the voltage signal generated by the capacitor discharge in the charge pump circuit and the voltage signal outputted by the low voltage power supply for charging the capacitor are superimposed.
  • the signal is used to supply power to the line driver.
  • the input signal of the line driver is less than the set value
  • the voltage signal outputted by the low voltage power supply in the charge pump circuit is used to supply power to the line driver, so that the line driver is based on the signal output from the charge pump circuit to the line driver.
  • the input signal is used for power amplification.
  • V ccp is the forward voltage output from the charge pump module
  • V eep is the negative voltage output from the charge pump module
  • V outp and V outn are differential signals output by the line driver. Since the proportion of the peak signal in the OFDM system is small or zero, the line driver is mostly powered by the low voltage power supply in the charge pump circuit, and the output voltage of the low voltage power supply in the charge pump circuit cannot be too small, otherwise it cannot be satisfied.
  • the present application provides a line driving device to solve the problem that the line driver in the prior art uses the charge pump mode to supply power, resulting in a large inefficient power consumption of the line driver.
  • the line driving device comprises: a signal input module, a first power supply module, a second power supply module, and a line drive module.
  • the first power supply module is connected to the signal output module and the first input end of the line drive module; the second power supply module and the signal output module and the first input end of the line drive module Connecting; the second input end of the line driving module is connected to the signal output module.
  • the signal output module is configured to output a first signal to the first power supply module, a second signal to the second power supply module, and a third signal to the line drive module.
  • the first signal is a digital signal or an analog signal of a voltage signal to be processed
  • the second signal is a digital signal or an analog signal of the to-be-processed voltage signal
  • the third signal is the to-be-processed voltage signal. Digital signal or analog signal.
  • the first power supply module is configured to receive the first signal, generate a corresponding first voltage according to the amplitude of the first signal at each moment, and pass the first input end of the line driving module
  • the line drive module outputs the first voltage.
  • the amplitude of the first voltage at any one time is greater than the amplitude of the first signal at the moment, and the amplitude of the first voltage at any one time and the amplitude of the first signal at the moment The difference is within the setting range.
  • the second power supply module is configured to receive the second signal, determine whether an absolute value of the second signal amplitude is greater than or equal to a set threshold, and if yes, generate a second according to the amplitude of the second signal And outputting, by the first input end of the line driving module, the second voltage to the line driving module; otherwise, the signal is not output, and the amplitude of the second voltage is greater than the amplitude of the second signal .
  • the line driving module is configured to receive the third signal, and perform power amplification on the third signal based on the first voltage and the second voltage.
  • the second power supply module does not output a signal
  • the The line driving module amplifies the signal output by the signal output module based on the first voltage input by the first power supply module.
  • the amplitude of the first voltage at any one time is greater than the amplitude of the signal output by the signal output module at the moment, the amplitude of the first voltage at any moment and the signal output by the signal output module at the moment
  • the difference between the amplitudes is within a set range, that is, the first voltage follows a signal change when the signal output module outputs, such that when the absolute value of the signal amplitude output by the signal output module is less than the set threshold,
  • the difference between the amplitude of the voltage signal output by the line driving module and the amplitude of the first voltage signal is small, that is, the line driver can effectively utilize the first voltage to perform the signal output by the signal output module. Amplifying, reducing heat generated by the line driving module through the first voltage.
  • the second power supply module When the absolute value of the signal amplitude output by the signal output module is greater than or equal to the set threshold, that is, when the signal output value of the signal output module is large, the second power supply module outputs the second voltage.
  • the line driving module amplifies a signal output by the signal output module based on the first voltage and the second voltage, such that an absolute value of a signal amplitude output by the signal output module is greater than or equal to
  • the first power supply module and the second power supply module can provide a voltage signal with a larger amplitude to the line driving module to satisfy a signal output by the line driving module to the signal output module. Magnification requirements.
  • the signal having an absolute value of the amplitude of the signal outputted by the signal output module is greater than or equal to the set threshold, and the absolute value of the signal amplitude output by the signal output module is less than the set threshold.
  • the difference between the amplitude of the voltage signal output by the line driving module and the amplitude of the first voltage signal is small. Therefore, the line driving device provided by the present application can improve the line driving module to the first power supply module. And the utilization of the voltage output by the second power supply module, thereby reducing power consumption and heat dissipation cost of the line driving device.
  • the line driving device further includes an anti-backflow module, which is respectively connected to an output end of the first power supply module and a first input end of the line driving module, for outputting the signal
  • an anti-backflow module which is respectively connected to an output end of the first power supply module and a first input end of the line driving module, for outputting the signal
  • the second signal outputted by the module is less than the set threshold
  • the first voltage outputted by the first power supply module is output to the first input end of the line driving module
  • the second signal outputted by the signal output module When the threshold is greater than or equal to the threshold, the second voltage outputted by the second power supply module is prevented from being poured into the first power supply module, which affects the performance of the first power supply module and the line drive module.
  • the line driving device may further include a control module, a first input end of the control module is connected to the first power supply module, and a second input end of the control module is opposite to the first The two power supply modules are connected, and the output end of the control module is connected to the first input end of the line drive module.
  • the control module is configured to: compare a magnitude of a first voltage output by the signal output module with a magnitude of a voltage output by the second power supply module, and output the first voltage and the output of the second power supply module One of the voltages having a larger amplitude; wherein the magnitude of the second voltage is greater than the magnitude of the first voltage.
  • the line driving module when the absolute value of the signal amplitude output by the signal output module is less than the set threshold, the line driving module amplifies the signal output by the signal output module based on the first voltage, when When the absolute value of the signal amplitude output by the signal output module is greater than or equal to the set threshold, the line driving module amplifies the signal output by the signal output module based on the second voltage output by the second power supply module. To further reduce the power consumption of the line driver.
  • the first power supply module is further configured to: determine, according to the amplitude of the first signal at each moment, before generating a corresponding first voltage. Whether the absolute value of the first signal amplitude is less than the set threshold, and if so, generating a corresponding first voltage according to the amplitude of the first signal at each moment; otherwise, no signal is output.
  • the line driving module when the absolute value of the signal amplitude output by the signal output module is less than the set threshold, the line driving module amplifies the signal output by the signal output module based on the first voltage, when When the absolute value of the signal amplitude output by the signal output module is greater than or equal to the set threshold, the line driving module amplifies the signal output by the signal output module based on the second voltage output by the second power supply module. To further reduce the power consumption of the line driver.
  • the first power supply module specifically includes an envelope module and a tracking power module.
  • the envelope module is configured to receive the first signal, generate an envelope signal of the first signal according to the first signal, and output an envelope of the first signal to the tracking power module a tracking power supply module, configured to receive an envelope signal of the first signal, generate the first voltage according to an envelope signal of the first signal, and pass the first input of the line driving module The terminal outputs the first voltage.
  • the envelope module may be further configured to: perform smoothing filtering on an envelope signal of the first signal, The partial high frequency component of the envelope signal of the first signal is removed, so that the tracking power supply module can accurately follow the change of the smoothed filtered envelope signal, and output the first voltage.
  • the tracking power module specifically includes a complex pulse width modulation module and a signal generating module, and the first input end of the pulse width modulation module is The output of the envelope module is connected, and the output of the pulse width modulation module is connected to the input of the signal generating module.
  • the pulse width modulation module is configured to receive an envelope signal of the first signal, generate a pulse width modulation signal corresponding to the envelope signal according to an envelope signal of the first signal, and send the pulse width modulation signal to the
  • the signal generation module outputs a pulse width modulation signal corresponding to the envelope signal.
  • the signal generating module is configured to receive the pulse width modulation signal, generate the first voltage according to the pulse width modulation signal, and output the first voltage through a first input end of the line driving module.
  • the tracking power module further includes an analog-to-digital conversion module, configured to receive the first voltage, convert the first voltage into a digital signal, and feed back the pulse width modulation module a digital signal of the first voltage; the pulse width modulation module is further configured to: receive the digital signal of the first voltage, compare an envelope signal of the first signal with a digital signal of the first voltage, according to comparison As a result, the pulse width modulated signal is adjusted such that the first voltage can accurately follow the first signal change.
  • an analog-to-digital conversion module configured to receive the first voltage, convert the first voltage into a digital signal, and feed back the pulse width modulation module a digital signal of the first voltage
  • the pulse width modulation module is further configured to: receive the digital signal of the first voltage, compare an envelope signal of the first signal with a digital signal of the first voltage, according to comparison As a result, the pulse width modulated signal is adjusted such that the first voltage can accurately follow the first signal change.
  • the second power supply module specifically includes a peak detection module and a charge pump module.
  • the peak detection module is configured to receive the second signal, determine whether an absolute value of the second signal amplitude is greater than or equal to the set threshold, and if yes, output a first control signal, otherwise output the first And a second control signal, wherein the first control signal is used to control the charge pump module to generate and output the second voltage, and the second control signal is used to control the charge pump module not to output a signal.
  • the charge pump module is configured to receive the first control signal when an absolute value of the second signal amplitude is greater than or equal to the set threshold, and generate and output the first control signal according to the first control signal
  • the second voltage receives the second control signal when the absolute value of the second signal amplitude is less than the set threshold, and does not output a signal.
  • the line driving module is a line driver.
  • the line driving module when the third signal is a digital signal, includes a digital-to-analog conversion module and a line driver, and the first input end of the line driver and the first power supply module and The second power supply module is connected, and the digital-to-analog conversion module is respectively connected to the signal output module and the second input end of the line driver.
  • the digital-to-analog conversion module is configured to receive the third signal, convert the third signal into an analog signal, and output the third to the line driver through a second input end of the line driver An analog signal of the signal; the line driver, configured to receive an analog signal of the third signal, and perform power amplification on the analog signal of the third signal based on the first voltage and the second voltage.
  • the first voltage, the second voltage, and the third signal are synchronized to prevent the line driving module from using the first voltage and the second voltage to the first
  • the three signals are amplified, the voltage superimposed by the first voltage and the second voltage at a certain moment cannot satisfy the amplification requirement of the third signal at the moment, and the signal output by the line driving module is distorted.
  • the first power supply module is further configured to perform delay processing on the first voltage before receiving the first voltage after receiving the first signal.
  • the second power supply module after receiving the second signal, is further configured to: perform delay processing on the second signal.
  • the line driving module after the line driving module receives the second signal, before the power amplification of the third signal based on the first voltage and the second voltage, the line driving module is further configured to: The second signal is subjected to delay processing.
  • the present application provides a line driving method, which is applied to a power supply module, wherein the power supply module has the functions of the first power supply module and the second power supply module in the first aspect, and the method includes:
  • the signal output module Receiving, by the signal output module, the first signal, according to the amplitude of the first signal at each moment, generating a corresponding first voltage, where the first signal is a digital signal or an analog signal of the to-be-processed voltage signal,
  • the amplitude of the first voltage at any one time is greater than the amplitude of the first signal at the moment, and the difference between the amplitude of the first voltage at any one time and the amplitude of the first signal at the moment is within the scope;
  • Receiving a second signal sent by the signal output module determining whether an absolute value of the second signal amplitude is greater than or equal to a set threshold, and if so, generating a second voltage according to the amplitude of the second signal, and passing
  • the first input end of the line driving module outputs the first voltage and the second voltage to the line driving module, otherwise, the first input end of the line driving module outputs the first to the line driving module a voltage, the second signal being a digital signal or an analog signal of the to-be-processed voltage signal, the magnitude of the second voltage being greater than a magnitude of the second signal, such that the line driving module is based on the a voltage and the second voltage power-amplifying the third signal, the third signal being a digital signal of the signal to be processed output by the signal output module through the second output end of the line driving module or Analog signal.
  • the line driving module is based on the first voltage, The signal output from the signal output module is amplified.
  • the amplitude of the first voltage at any one time is greater than the amplitude of the signal output by the signal output module at the moment, the amplitude of the first voltage at any moment and the signal output by the signal output module at the moment
  • the difference between the amplitudes is within a set range, that is, the first voltage follows a signal change when the signal output module outputs, such that when the absolute value of the signal amplitude output by the signal output module is less than the set threshold,
  • the difference between the amplitude of the voltage signal output by the line driving module and the amplitude of the first voltage signal is small, that is, the line driver can effectively utilize the signal output by the first voltage to the signal output module.
  • Amplifying is performed to reduce heat generated by the line driving module through the first voltage.
  • the line driving module is based on the first voltage And the second voltage, the signal output by the signal output module is amplified, so that when the absolute value of the signal amplitude output by the signal output module is greater than or equal to the set threshold, the line can be driven
  • the module provides a voltage signal having a large amplitude to satisfy the amplification requirement of the signal outputted by the line driving module to the signal output module.
  • the signal having an absolute value of the amplitude of the signal outputted by the signal output module is greater than or equal to the set threshold, and the absolute value of the signal amplitude output by the signal output module is less than the set threshold.
  • the difference between the amplitude of the voltage signal output by the line driving module and the amplitude of the first voltage signal is small. Therefore, the line driving method provided by the present application can improve the utilization ratio of the line driving module to the power supply voltage. Further, the power consumption and the heat dissipation cost of the line driving device can be reduced.
  • the line driving module when the absolute value of the signal amplitude output by the signal output module is less than the set threshold, the line driving module amplifies the signal output by the signal output module based on the first voltage, when When the absolute value of the signal amplitude output by the signal output module is greater than or equal to the set threshold, the line driving module amplifies the signal output by the signal output module based on the second voltage to further reduce the The power consumption of the line driver.
  • generating the corresponding first voltage according to the amplitude of the first signal at each moment specifically includes the following steps: generating an envelope signal of the first signal according to the first signal, And generating the first voltage according to the envelope signal of the first signal.
  • the envelope signal of the first signal is smooth filtered to remove a portion of the high frequency components of the envelope signal of the first signal.
  • generating the first voltage according to the envelope signal of the first signal includes the following steps: forming an envelope signal according to the first signal Generating a pulse width modulation signal corresponding to the envelope signal, and generating the first voltage according to the pulse width modulation signal.
  • the first signal is a digital signal
  • the pulse width modulation signal after the generating the first voltage according to the pulse width modulation signal, converting the first voltage into a digital signal, and comparing the The envelope signal of the first signal and the digital signal of the first voltage adjust the pulse width modulation signal according to a comparison result such that the first voltage can accurately follow the first signal change.
  • the line driving module is a line driver.
  • the first voltage, the second voltage, and the third signal are synchronized to prevent the line driving module from using the first voltage and the second voltage to the first
  • the three signals are amplified, the voltage superimposed by the first voltage and the second voltage at a certain moment cannot satisfy the amplification requirement of the third signal at the moment, and the signal output by the line driving module is distorted.
  • delaying the first voltage is further performed before outputting the first voltage.
  • the method further comprises: performing delay processing on the second signal.
  • the present application provides a line driving device and method.
  • the utilization ratio of the line driving module to the power supply voltage can be improved, and the power consumption and the heat dissipation cost of the line driving device can be reduced.
  • FIG. 1 is a schematic diagram of an output signal of a line driver and a power supply voltage signal of a line driver in the prior art
  • FIG. 2 is a schematic structural view of a line driving device in the prior art
  • FIG. 3 is a schematic structural diagram of a line driving device according to an embodiment of the present application.
  • FIG. 4a is a schematic structural diagram of a line driving device according to an embodiment of the present application.
  • 4b is a schematic structural diagram of a line driving device according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a first power supply module according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of an envelope signal in an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a tracking power module according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another tracking power module according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a second power supply module according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a charge pump module according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of an output signal of a line driving module and a power supply voltage signal of a line driving module according to an embodiment of the present application;
  • FIG. 12 is a schematic structural diagram of a line driving module according to an embodiment of the present application.
  • FIG. 12b is a schematic structural diagram of another line driving module according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a line driving apparatus according to an embodiment of the present application.
  • FIG. 13b is a schematic structural diagram of a line driving apparatus according to an embodiment of the present application.
  • 13c is a schematic structural diagram of a line driving device according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a line driving apparatus according to an embodiment of the present application.
  • FIG. 14 is a schematic flowchart diagram of a line driving method according to an embodiment of the present application.
  • the structure of the line drive module 200 in the prior art is as shown in FIG. 2, and includes a signal output module 201, a peak detection module 202, a charge pump module 203, a delay module 204, and a line driver 205, wherein the input of the peak detection module 202 Connected to the output of the signal output module 201, the output of the peak detection module 202 is coupled to the input of the charge pump module 202, the output of the charge pump module 203 is coupled to an input of the line driver 205, and the input of the delay module 204 The terminal is connected to the output of the signal output module 201, and the output of the delay module 204 is connected to the other input of the line driver 205.
  • the signal output module 201 is configured to output the signal to be amplified to the peak detecting module 202 and the delay module 204. If the line driving module 200 is disposed in the xDSL communication device, the signal output module 201 may be an AFE.
  • the peak detecting module 202 is configured to receive the signal to be amplified output by the signal output module 201, detect the amplitude of the signal to be amplified, and determine whether the absolute value of the amplitude of the signal to be amplified is greater than a set value, and if so, output the first control
  • the signal is discharged by controlling the capacitance in the charge pump module 203, so that the voltage signal generated by the charge pump module 202 by the voltage signal generated by the capacitor discharge and the voltage signal outputted by the low voltage power supply for charging the capacitor in the charge pump module 203 is
  • the line driver 205 is powered, otherwise, a second control signal is output to control the low voltage power supply in the charge pump module 203 to charge the capacitor in the charge pump module 203, and to control the charge pump module 203 to power the line driver 205 through the low voltage power supply.
  • the charge pump module 203 is configured to receive the first control signal sent by the peak detection module 202, and output a voltage signal generated by the capacitor discharge in the charge pump module 203 and a voltage signal superposed by the voltage signal output by the low voltage power supply according to the first control signal. Powering the line driver 205, or receiving a second control signal sent by the peak detection module 202, charging the capacitor in the charge pump module 203 through the low voltage power supply in the charge pump module 203 according to the second control signal, and passing the low voltage The voltage signal output by the power supply supplies power to the line driver 205.
  • the delay module 204 is configured to delay the signal to be amplified outputted by the signal output module 201 to synchronize the signal output by the delay module 204 with the signal output by the charge pump module 203.
  • the line driver 205 is configured to perform power amplification on the signal output by the delay module 204 based on the voltage signal output by the charge pump module 203.
  • the line driver Since the signal output module 201 outputs a signal in which the absolute value of the amplitude of the signal to be amplified is larger than the set value, the line driver is mostly supplied with the low voltage power supply in the charge pump module.
  • the output voltage of the low voltage power supply in the charge pump module 203 cannot be too small, otherwise the line driver 205 can not meet the amplification requirement of the signal whose absolute value of the amplitude of the signal output by the delay module 204 is greater than the set value, so that the signal is amplified for a long time.
  • the voltage difference between the supply voltage of the internal line driver 205 and the signal output by the line driver 205 is large (as shown in FIG. 1), and the supply voltage of the line driver 205 is mostly consumed in the form of thermal energy on the line driver, resulting in a line.
  • the inefficient power consumption of the driver 205 is large.
  • the present application proposes a line driving device and method to improve the driving efficiency of the line driver and reduce the inefficient power consumption.
  • a line driving device 300 provided by an embodiment of the present application includes a signal output module 310 , a first power supply module 320 , a second power supply module 330 , and a line driving module 340 .
  • the first power supply module 320 is connected to the first input end of the signal output module 310 and the line drive module 340
  • the second power supply module 330 is connected to the first input end of the signal output module 310 and the line drive module 340
  • the line drive module 340 is connected.
  • the second input is coupled to the signal output module 310.
  • the signal output module 310 is configured to output a first signal to the first power supply module 320, a second signal to the second power supply module 330, and a third signal to the line driving module 340.
  • the first signal is a digital signal or an analog signal of the to-be-processed voltage signal
  • the second signal is a digital signal or an analog signal of the to-be-processed voltage signal
  • the third signal is a digital signal or analog of the to-be-processed voltage signal. signal.
  • the first power supply module 320 is configured to receive the first signal output by the signal output module 310, generate a corresponding first voltage according to the amplitude of the first signal at each moment, and pass the first input end of the line driving module 340.
  • the first voltage is output to the line drive mode 340 block.
  • the amplitude of the first voltage at any one time is greater than the amplitude of the first signal at the moment, and the difference between the amplitude of the first voltage at any one moment and the amplitude of the first signal at the moment is Within the range.
  • the second power supply module 330 is configured to receive the second signal output by the signal output module 310, determine whether the absolute value of the second signal amplitude is greater than or equal to a set threshold, and if so, generate a first The second voltage is output to the line drive module 340 through the first input of the line drive module 340. Otherwise, no signal is output. The magnitude of the second voltage is greater than the magnitude of the first voltage.
  • the line driving module 340 is configured to receive the third signal output by the signal output module 310, and perform power amplification on the third signal based on the first voltage output by the first power supply module 320 and the second voltage output by the second power supply module 330.
  • the second power supply module 330 when the absolute value of the signal amplitude outputted by the signal output module 310 is less than the set threshold, that is, when the signal amplitude output by the signal output module 310 is small, the second power supply module 330 The signal is not output.
  • the line driving module 340 amplifies the signal output by the signal output module 310 based on the first voltage input by the first power supply module 320. And the amplitude of the first voltage at any one time is greater than the amplitude of the signal output by the signal output module 310 at the moment, the amplitude of the first voltage at any one time and the amplitude of the signal output by the signal output module 310 at the moment.
  • the difference is within the set range, that is, the first voltage follows the signal outputted by the signal output module 310, such that when the absolute value of the signal amplitude output by the signal output module 310 is less than the set threshold, the output of the line driving module 340
  • the difference between the amplitude of the voltage signal and the amplitude of the first voltage signal is small, that is, the line driver 340 can effectively use the first voltage to amplify the signal output by the signal output module 310, and reduce the line driving module 340 to pass the The heat generated by the first voltage.
  • the second power supply module 330 When the absolute value of the signal amplitude outputted by the signal output module 310 is greater than or equal to the set threshold, that is, when the signal amplitude output by the signal output module 310 is large, the second power supply module 330 outputs the second voltage, and the line driving module 340
  • the signal outputted by the signal output module 310 is amplified based on the first voltage and the second voltage, so that when the absolute value of the signal amplitude output by the signal output module 310 is greater than or equal to the set threshold, the first power supply module 320
  • the second power supply module 330 can provide a voltage signal with a larger amplitude to the line driving module 340 to meet the amplification requirement of the signal output by the line driving module 340 to the signal output module 310.
  • the line driving apparatus can improve the line driving module 340 to the first power supply module 320 and the The utilization of the voltage output by the two power supply modules 330 can further reduce the power consumption and heat dissipation cost of the line driving device 300.
  • the signal output module 310 may be a DFE, or the signal output module may be an AFE, or the signal output module 310 may integrate the DFE and the AFE.
  • the first signal output by the signal output module 310 is a digital signal
  • the first signal is a signal output by the DFE.
  • the first signal is an analog signal
  • the first signal is a signal output by the AFE;
  • the signal output module 310 When the outputted second signal is a digital signal, the second signal is a signal output by the DFE.
  • the second signal is an analog signal
  • the second signal is a signal output by the AFE
  • the third signal is output by the signal output module 310
  • the third signal is a signal output by the DFE
  • the third signal is a signal output by the AFE
  • the signal output module 310 may also be a signal generator.
  • the difference between the amplitude of the first voltage output by the first power supply module 320 and the amplitude of the first signal output by the signal output module 310 may be determined according to an empirical value or a simulation result.
  • the difference between the amplitude of the first voltage and the amplitude of the first signal is small, and when the amplitude of the third signal received by the line driving module 340 is less than a set threshold, the amplitude of the first voltage can satisfy The line driver module 340 requires amplification of the third signal.
  • the line driving device 300 may further include a control module 350.
  • the first input end of the control module 350 is connected to the first power supply module 320, and the second input end of the control module 350 is The two power supply modules 330 are connected, and the output of the control module 350 is connected to the first input end of the line drive module 340.
  • the control module 350 is configured to compare the magnitude of the first voltage output by the signal output module 310 with the magnitude of the voltage output by the second power supply module 330, and output the first voltage and the voltage output by the second power supply module 330.
  • the second voltage supply module 330 outputs a second voltage amplitude greater than the first power supply module 320 outputs the first voltage amplitude.
  • the first power supply module 310 When the absolute value of the first signal amplitude outputted by the signal output module 310 is less than the set threshold, the first power supply module 310 outputs the first voltage, the second power supply module 330 does not output the signal, and the control module 350 outputs the first voltage; When the absolute value of the first signal amplitude outputted by the signal output module 310 is greater than or equal to the set threshold, the first power supply module 320 outputs the first voltage, and the second power supply module 330 outputs a second voltage, where the second voltage is greater than the The first voltage is output by the control module 350, so that when the absolute value of the signal amplitude output by the signal output module 310 is less than the set threshold, the line driving module 340 is based on the first voltage pair signal output by the first power supply module 320.
  • the signal output by the output module is amplified.
  • the line driving module 350 outputs the second voltage to the signal output module based on the second voltage output from the second power supply module 330.
  • the signal is amplified to further reduce the power consumption of the line driving device 300.
  • the line driving device 300 further includes an anti-backflow module 360, which is respectively connected to the output end of the first power supply module 320 and the first input end of the line driving module 340, for When the second signal outputted by the signal output module 310 is less than the set threshold, the first voltage outputted by the first power supply module 320 is output to the first input end of the line driving module 340, and the second signal outputted by the signal output module 310 is outputted.
  • the threshold value is greater than or equal to the threshold, the second voltage outputted by the second power supply module 330 is prevented from being reversed into the first power supply module 320, affecting the performance of the first power supply module 320 and the line driving module 340.
  • the anti-backflow module 360 can be a diode, wherein the anode of the diode is connected to the output end of the first power supply module, and the cathode of the diode is connected to the first input end of the line driving module 340.
  • the first power supply module 320 may be further configured to: determine, according to the amplitude of the first signal at each moment, before generating the corresponding first voltage. Whether the absolute value of the amplitude of the first signal is less than the set threshold, and if so, generating a corresponding first voltage according to the amplitude of the first signal at each moment; otherwise, the signal is not output, so that the signal output module
  • the line driving module 340 amplifies the signal output by the signal output module based on the first voltage output by the first power supply module 320, and outputs the signal output by the signal output module 310.
  • the line driving module 340 When the absolute value of the amplitude is greater than or equal to the set threshold, the line driving module 340 amplifies the signal output by the signal output module based on the second voltage output by the second power supply module 330 to further reduce the power consumption of the line driving device 300.
  • the first power supply module 320 specifically includes an envelope module 321 and a tracking power module 322.
  • the input end of the envelope module 321 is connected to the output end of the signal output module 310, and the output end and tracking of the envelope module 321
  • the input end of the power module 322 is connected, and the output end of the tracking power module 322 is connected to the first input end of the line driving module, as shown in FIG. 5.
  • the envelope module 321 is configured to receive the first signal output by the signal output module 310, generate an envelope signal of the first signal according to the first signal, and output an envelope signal of the first signal to the tracking power module 322.
  • the tracking power module 322 is configured to receive an envelope signal of the first signal, generate the first voltage according to the envelope signal of the first signal, and output the first voltage through a first input end of the line driving module 340.
  • the envelope signal of the first signal is a signal formed by an extreme value in the first signal, and the high frequency component in the envelope signal of the first signal is smaller than the first signal, that is, the first The rate of change of the envelope signal of a signal is small to satisfy the tracking performance of the tracking power module 322, and the first voltage is generated according to the envelope signal of the first signal.
  • the first signal and the envelope signal of the first signal are as shown in FIG. 6.
  • the envelope module 321 is further configured to: perform smoothing filtering on the envelope signal of the first signal to remove a part of the high frequency in the envelope signal of the first signal. signal.
  • the tracking power module 322 specifically includes a complex pulse width modulation module 701 and a signal generating module 702, wherein the first input end of the pulse width modulation module 701 Connected to the output of the envelope module 321, the output of the pulse width modulation module 701 is coupled to the input of the signal generation module 702, as shown in FIG.
  • the pulse width modulation module 701 is configured to receive an envelope signal of the first signal, generate a pulse width modulation signal corresponding to the envelope signal of the first signal according to the envelope signal of the first signal, and send the signal to the signal generation module 702. Outputting a pulse width modulation signal corresponding to the envelope signal of the first signal, so that the pulse width modulation module 701 can perform pulse width modulation on the first signal in the digital domain, and the implementation of the pulse width modulation is relatively easy, thereby further reducing the line driving. The cost of the module.
  • the signal generating module 702 is configured to receive the pulse width modulation signal, generate the first voltage according to the pulse width modulation signal, and output the first voltage through a first input end of the line driving module 340.
  • the tracking power module 322 further includes an analog-to-digital conversion module 801.
  • the input end of the digital-to-analog conversion module 801 is connected to the output end of the signal generating module 702, and the digital-to-analog conversion module 801 is connected.
  • the output is connected to the second input of the pulse width modulation module 701, as shown in FIG.
  • the analog-to-digital conversion module 801 is configured to receive the first voltage, convert the first voltage into a digital signal, and feed back the digital signal of the first voltage to the pulse width modulation module 701.
  • the pulse width modulation module 701 is further configured to: receive the digital signal of the first voltage, compare the envelope signal of the first signal with the digital signal of the first voltage output by the analog-to-digital conversion module 801, and adjust the pulse width according to the comparison result. Modulated signal.
  • the pulse width modulation module 701 adjusts the pulse width modulation signal according to the comparison result, specifically, when the amplitude of the envelope signal of the first signal is greater than the amplitude of the digital signal of the first voltage.
  • the second power supply module 330 specifically includes a peak detecting module 331 and a charge pump module 332.
  • the input end of the peak detecting module 331 is connected to the output end of the signal output module, and the output end of the peak detecting module 331 is connected.
  • the output of the charge pump module 332 is coupled to the first input of the line drive module.
  • the peak detection module 331 is configured to receive the second signal output by the signal output module 310, determine whether the absolute value of the second signal amplitude is greater than or equal to a set threshold, and if yes, output the first control signal, otherwise output And a second control signal, the first control signal is used to control the charge pump module 332 to generate and output the second voltage, and the second control signal is used to control the charge pump module 332 not to output a signal.
  • the charge pump module 332 is configured to receive the first control signal when the absolute value of the second signal amplitude is greater than or equal to the set threshold, and generate and output the second voltage according to the first control signal, where When the absolute value of the second signal amplitude is less than the set threshold, the second control signal is received, and no signal is output.
  • the charge pump module 332 includes a voltage source U1, a first transistor Q1, a second transistor Q2, a diode D1, a capacitor C1, and a mirror current source I1, as shown in FIG.
  • the anode of the voltage source U1 is connected to the anode of the diode D1, and the cathode of the voltage source U1 is grounded.
  • the first transistor Q1 is an NPN type transistor
  • the base of the first transistor Q1 is connected to the output end of the peak detecting module 331, and the collector of the first transistor Q1 is connected to the anode of the diode D1, first The emitter of the transistor Q1 is connected to the mirror current source I1.
  • the base of the first transistor Q1 is connected to the output of the peak detecting module 331, and the first three poles The emitter of the tube Q1 is connected to the anode of the diode D1, and the collector of the first transistor Q1 is connected to the mirror current source I1.
  • the second transistor Q2 is an NPN transistor, the base of the second transistor Q2 is connected to the output of the peak detecting module 331, the collector of the second transistor Q2 is connected to the cathode of the diode D1, and the second The emitter of the transistor Q2 is connected to the first input end of the line driving module 340.
  • the base of the second transistor Q2 is connected to the output of the peak detecting module 331.
  • the emitter of the second transistor Q2 is connected to the cathode of the diode D1, and the collector of the second transistor Q2 is connected to the first input of the line driver module 340.
  • the capacitor C1 is connected to the negative electrode of the diode D1 and the mirror current source I1, respectively.
  • the peak detection module 331 When the peak detection module 331 outputs the first control signal, the first transistor Q1 and the second transistor Q2 are turned on, the diode D1 is turned off, and the output end of the voltage source U1 is connected to the cathode of the capacitor C1 through the transistor Q1.
  • the voltage source Q1 supplies power to the line driving module 340 through the first transistor Q1, the capacitor C1 and the second transistor Q2, and the voltage output by the second transistor Q2 (the second voltage output from the charge pump module 332) is The sum of the voltage of the voltage source U1 and the voltage generated by the discharge of the capacitor C1; when the peak detection module 331 outputs the second control signal, the first transistor Q1 and the second transistor Q2 are turned off, the diode D1 is turned on, and the voltage source U1 The capacitor C1 is charged by the mirror current source I1, and the voltage output by the second transistor Q2 (the second voltage output by the charge pump module 332) is zero.
  • the noise generated by the second voltage amplitude outputted by the charge pump module 322 is hopped to the performance of the line driving device 300.
  • the peak detection module 331 determines that the absolute value of the second signal amplitude is less than the set threshold, it is further configured to: determine whether the absolute value of the amplitude of the second signal is greater than a set lower limit, and if yes, output a third control signal, otherwise outputting the second control signal, wherein the three control signals are used to control the charge pump module 332 to output a third voltage, the third voltage being greater than the first voltage and less than the second voltage;
  • the module 332 is further configured to: when the absolute value of the second signal amplitude is greater than the set lower limit, and less than the set threshold, receive the third control signal, and output the third according to the third control signal Voltage.
  • the charge pump module 332 delays the third control signal and outputs the result to the first transistor Q1. And directly outputting the third control signal to the second transistor Q2, so that the charge pump module 332 can first control the second transistor Q2 and the diode D1 to be turned on, and pass the voltage source U1, the diode D1, and the second transistor.
  • Q2 supplies power to the line driving module 340.
  • the voltage outputted by the second transistor Q2 is the voltage of the voltage source U1 (ie, the third voltage), and when the absolute value of the amplitude of the second signal is greater than the set threshold, Controlling the first transistor Q1 to be turned on, and supplying power to the line driving module 340 through the voltage source U1, the first transistor Q1, the mirror current source I1, the capacitor C1, the diode D1, and the second transistor Q2.
  • the voltage output from the transistor Q2 is the sum of the voltage of the voltage source U1 and the voltage generated by the discharge of the capacitor C1.
  • the peak detecting module 331 When the absolute value of the second signal amplitude outputted by the signal output module 310 is greater than the set lower limit value, and less than the set threshold value, the peak detecting module 331 further outputs the third control signal to control the output of the charge pump module 332.
  • the differential voltage signals V outp and V outn output by the line driving module 340 in the line driving device 300, the first voltage output by the first power supply module 320 and the second voltage output by the second power supply module 330 are superimposed.
  • the forward voltage V ccp and the negative voltage V eep obtained later are as shown in FIG.
  • FIG. 11 when the amplitude of the signal output by the signal output module 310 is small, the amplitude of the voltage signal output by the line driving module 340 is different from the amplitude of the signal obtained by superimposing the first voltage and the second voltage. small.
  • the line driving module 340 when the third signal output by the signal output module 310 is an analog signal, the line driving module 340 is the line driver 341, as shown in FIG. 12a.
  • the line driving module 340 includes a line driver 341 and a digital-to-analog conversion module 342.
  • the first input end of the line driver 342 is connected to the first power supply module 320 and the second power supply module 330, and digital-to-analog conversion
  • the input of module 341 is coupled to the output of signal output module 310, and the output of digital to analog conversion module 341 is coupled to the second input of line driver 342, as shown in Figure 12b.
  • the digital-to-analog conversion mode 341 is configured to receive the third signal, convert the third signal into an analog signal, and output an analog signal of the third signal to the line driver 342 through the second input end of the line driver 342;
  • the driver 342 is configured to receive an analog signal of the third signal, and perform power amplification on the analog signal of the third signal based on the first voltage output by the first power supply module 320 and the second voltage output by the second power supply module 330.
  • the first voltage output by the first power supply module 320, the second voltage output by the second power supply module 330, and the third signal output by the signal output module 310 are synchronized to prevent the line driving module 340 from being based on the first voltage and the
  • the second voltage is amplified by the third signal
  • the voltage superimposed by the first voltage and the second voltage at a certain moment cannot satisfy the amplification requirement of the third signal at the moment, and the signal output by the line driving module 340 is distorted.
  • the first power supply module 320 may further be configured to: delay processing the first voltage, so that the first power supply module The first voltage outputted by 320, the second voltage output by the second power supply module 330, and the third signal output by the signal output module 310 are synchronized.
  • the second power supply module 330 may be further configured to: delay processing the second signal, so that the first voltage output by the first power supply module 320, The second voltage output by the second power supply module 330 is synchronized with the third signal output by the signal output module 310.
  • the line driving module 340 after receiving the third signal output by the signal output module 310, performs power on the third signal based on the first voltage output by the first power supply module 320 and the second voltage output by the second power supply module 330.
  • the second signal is further processed to delay the first voltage output by the first power supply module 320, the second voltage output by the second power supply module 330, and the third output of the signal output module 310. Signal synchronization.
  • At least two modules of the first power supply module 320, the second power supply module 330, and the line driving module 340 further include a delay module for delay processing the input signals corresponding to the at least two modules.
  • the first voltage output by the first power supply module 320, the second voltage output by the second power supply module 330, and the third signal output by the signal output module 310 are synchronized.
  • the line driving device 300 can realize the first voltage, the second voltage, and the third signal synchronization by, but not limited to, the following three methods:
  • the first power supply module 320 further includes a first delay module 323, and the second power supply module 320 further includes a second delay module 333.
  • the input end of the first delay module 323 is connected to the output end of the signal output module 310.
  • the output end of the first delay module 323 is connected to the input end of the envelope module 321 for receiving the first signal output by the signal output module 310. And delaying the first signal; or the input end of the first delay module 323 is connected to the output end of the envelope module 321 , and the output end of the first delay module 323 is connected to the input end of the tracking power module 322
  • the envelope signal of the first signal output by the envelope module 321 is subjected to delay processing on the envelope signal of the first signal.
  • the input end of the second delay module 333 is connected to the output end of the signal output module 310, and the output end of the second delay module 333 is connected to the input end of the peak detecting module 331 for receiving the second signal output by the signal output module 310.
  • the second signal is delayed.
  • the input of the second delay module 333 is connected to the output of the peak detection module 331, and the output of the second delay module 333 is connected to the input of the charge pump module 332. And receiving the first control signal or the second control signal output by the peak detecting module 331, and performing delay processing on the first control signal or the second control signal.
  • the first power supply module 320 further includes a first delay module 323.
  • the second power supply module 320 further includes a second delay module 333, the structure of the line driving device 300 is as shown in FIG. 13a.
  • the first power supply module 320 further includes a first delay module 323, and the line driving module 340 further includes a third delay module 343.
  • the input end of the first delay module 323 is connected to the output end of the signal output module 310.
  • the output end of the first delay module 323 is connected to the input end of the envelope module 321 for receiving the first signal output by the signal output module 310. And delaying the first signal; or the input end of the first delay module 323 is connected to the output end of the envelope module 321 , and the output end of the first delay module 323 is connected to the input end of the tracking power module 322
  • the envelope signal of the first signal output by the envelope module 321 is subjected to delay processing on the envelope signal of the first signal.
  • the input end of the third delay module 343 is connected to the output end of the signal output module 310, and the output end of the third delay module 343 is connected to the second end of the line driver 342.
  • the input terminal is connected to receive the third signal, and delay processing the third signal.
  • the input end of the third delay module 343 is connected to the output end of the digital-to-analog conversion module 341, and the output end of the third delay module 343 and the line driver 342 are
  • the second input terminal is connected to receive the analog signal of the third signal, and delays the analog signal of the third signal; or the input end of the third delay module 343 is connected to the output end of the signal output module 310.
  • the output end of the third delay module 343 is connected to the input end of the digital-to-analog conversion module 341 for receiving the third signal and performing delay processing on the third signal.
  • the first power supply module 320 further includes a first delay module 323.
  • the line driving module 340 further includes a third delay module 343, the structure of the line driving device 300 is as shown in FIG. 13b.
  • the third power supply module 330 further includes a second delay module 333
  • the line driving module 340 further includes a third delay module 343.
  • the connection manner and function of the second delay module 333 and the third delay module 343 are the same as the connection manner and function of the second delay module 333 and the third delay module 343 in the first mode and the second embodiment. Refer to the related description in the first embodiment and the specific embodiment 2, and details are not described herein again.
  • the second power supply module 330 further includes a first delay module 333.
  • the line drive module 340 further includes a third delay module 343, the structure of the line driving device 300 is as shown in FIG. 13c.
  • the fourth power supply module 320 further includes a first delay module 323, the second power supply module 320 further includes a second delay module 333, and the line driving module 340 further includes a third delay module 343.
  • the first delay module 323, the second delay module 333, and the third delay module 343 are connected and function, and the first delay module 323 and the second delay module 333 in the first mode and the second mode.
  • the connection mode and the function of the third delay module 343 are the same.
  • the first power supply module 320 further includes a first delay module 323, and the second power supply module 320 further includes a second delay module 333.
  • the line driving module 340 further includes the third delay module 343, the structure of the line driving device 300 As shown in Figure 13d.
  • the present application also provides a line driving method.
  • the method can be regarded as a method performed by the first power supply module and the second power supply module in the line driving device 300. Referring to Figure 14, the method includes the following steps:
  • S1401 Receive a first signal sent by the signal output module, and generate a corresponding first voltage according to the amplitude of the first signal at each moment.
  • the first signal is a digital signal or an analog signal of the voltage signal to be processed, and the amplitude of the first voltage at any time is greater than the amplitude of the first signal at the moment, and the amplitude of the first voltage is at any time.
  • the difference between the value and the amplitude of the first signal at that time is within a set range.
  • S1402 Receive a second signal sent by the signal output module, determine whether an absolute value of the second signal amplitude is greater than or equal to a set threshold, and if yes, execute step S1403, otherwise perform step S1404.
  • the second signal is a digital signal or an analog signal of the to-be-processed voltage signal.
  • sequence of S1401 and S1402 is not limited. S1401 may be executed first, then S1402 may be executed, S1402 may be executed first, then S1401 may be executed, and S1401 and S1402 may be simultaneously executed.
  • S1403 Generate a second voltage according to the amplitude of the second signal, and output the first voltage and the second voltage to the line driving module through a first input end of the line driving module. Wherein the amplitude of the second voltage is greater than the amplitude of the second signal.
  • S1404 output the first voltage to the line driving module through a first input end of the line driving module.
  • the line driving module performs power amplification on the third signal based on the first voltage and the second voltage, where the third signal is a to-be-processed voltage signal output by the signal output module through the second output end of the line driving module.
  • Digital signal or analog signal is a to-be-processed voltage signal output by the signal output module through the second output end of the line driving module.
  • the method shown in FIG. 14 can be regarded as the method performed by the first power supply module and the second power supply module in the line driving device 300.
  • the implementation manner not described in detail in the method shown in FIG. 14 can be referred to the line driving device 300.
  • the embodiment of the present application provides a line driving device and method.
  • the solution provided by the embodiment of the present application can improve the utilization ratio of the line driving module to the power supply voltage, thereby reducing the power consumption and heat dissipation of the line driving device. cost.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请提供了一种线路驱动装置，该装置包括：信号输出模块，用于向第一供电模块输出第一信号，向第二供电模块输出第二信号以及向线路驱动模块输出第三信号；第一供电模块，用于根据该第一信号在每个时刻的幅值，生成相应的第一电压，并向线路驱动模块输出该第一电压，该第一电压在该时刻的幅值与该第一信号在该时刻的幅值之差在设定范围内；第二供电模块，用于判断该第二信号幅值的绝对值是否大于或等于设定阈值，若是，则根据该第二信号的幅值生成第二电压，并向线路驱动模块输出该第二电压，否则，不输出信号，该第二电压的幅值大于该第二信号的幅值；线路驱动模块，用于基于该第一电压和该第二电压对该第三信号进行功率放大。

Description

一种线路驱动装置
本申请要求于2018年3月5日提交中国专利局、申请号为201810178433.4、申请名称为“一种线路驱动装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种线路驱动装置。
背景技术
x数字用户线路(x digital subscriber line，xDSL)通信设备(如调制解调器(modem))通常包括数字前端(digital front end，DFE)、模拟前端(analog front end，AFE)、线路驱动器(line driver，LD)和混合(hybrid)电路。其中，DFE用于对外部设备输入DFE的信号进行数字信号处理，实现xDSL协议的功能，AFE用于对DEF输入AFE的信号进行数模转换，以及对混合电路输入AFE的信号进行模数转换，LD用于将AFE输入LD的信号进行功率放大，混合电路用于分离LD输出的信号以及外部设备输入到混合电路的信号，将LD输出的信号耦合到传输线缆上进行传输，将外部设备输入到混合电路的信号发送给AFE。
线路驱动器是xDSL通信设备的最后一级功率发送单元，它的发送功率和性能直接决定通信系统的链路质量和传输的距离。由于xDSL通信系统采用正交频分复用(orthogonal frequency-division multiplexing，OFDM)调制方式，承载数据位数较高(15bit)，线路驱动器的输出信号的峰均比一般会达到16dB(即线路驱动器的输出信号峰值是其有效值的6.3倍左右)，因此线路驱动器的供电电源必须足够大以满足线路驱动器的输入信号发送信号中峰值信号的放大需求，以保证线路驱动器的输出信号不失真。
目前主要采用电荷泵方式为线路驱动器供电，当线路驱动器的输入信号大于或等于设定值时，采用电荷泵电路中电容放电产生的电压信号以及为该电容充电的低压电源输出的电压信号叠加后的信号为线路驱动器供电，当线路驱动器的输入信号小于设定值时，采用电荷泵电路中低压电源输出的电压信号为线路驱动器供电，使得线路驱动器基于电荷泵电路输出的信号，对线路驱动器的输入信号进行功率放大。
采用电荷泵方式供电时，线路驱动器输出的信号以及电荷泵电路输出的信号如图1所示，其中，V ccp为电荷泵模块输出的正向电压，V eep为电荷泵模块输出的负向电压，V outp、V outn为线路驱动器输出的差分信号。由于在OFDM系统中峰值信号的占比很小或为0，线路驱动器大部分时间都是由电荷泵电路中的低压电源供电，且电荷泵电路中低压电源的输出电压不能太小，否则无法满足对线路驱动器的输入信号中峰值信号的放大需求，因此在较长时间内线路驱动器的供电电压与输出信号之间的电压差值较大，使得线路驱动器的供电电压大部分以热能的形式消耗在线路驱动器上，导致线路驱动器的无效功耗较大。
发明内容
本申请提供了一种线路驱动装置，以解决现有技术中线路驱动器采用电荷泵方式供电导致线路驱动器的无效功耗较大的问题。
本申请提供的线路驱动装置包括：信号输入模块、第一供电模块、第二供电模块以及线路驱动模块。其中，所述第一供电模块与所述信号输出模块、所述线路驱动模块的第一输入端连接；所述第二供电模块与所述信号输出模块、所述线路驱动模块的第一输入端连接；所述线路驱动模块的第二输入端与所述信号输出模块相连。
所述信号输出模块，用于向所述第一供电模块输出第一信号，向所述第二供电模块输出第二信号以及向所述线路驱动模块输出第三信号。其中，所述第一信号为待处理电压信号的数字信号或模拟信号，所述第二信号为所述待处理电压信号的数字信号或模拟信号，所述第三信号为所述待处理电压信号的数字信号或模拟信号。
所述第一供电模块，用于接收所述第一信号，根据所述第一信号在每个时刻的幅值，生成相应的第一电压，并通过所述线路驱动模块的第一输入端向所述线路驱动模块输出所述第一电压。其中，所述第一电压在任一时刻的幅值大于所述第一信号在该时刻的幅值，且所述第一电压在任一时刻的幅值与所述第一信号在该时刻的幅值之差在设定范围内。
所述第二供电模块，用于接收所述第二信号，判断所述第二信号幅值的绝对值是否大于或等于设定阈值，若是，则根据所述第二信号的幅值生成第二电压，并通过所述线路驱动模块的第一输入端向所述线路驱动模块输出所述第二电压，否则，不输出信号，所述第二电压的幅值大于所述第二信号的幅值。
所述线路驱动模块，用于接收所述第三信号，并基于所述第一电压和所述第二电压对所述第三信号进行功率放大。
采用上述方案，当信号输出模块输出的信号幅值的绝对值小于设定阈值时，即所述信号输出模块输出的信号幅值较小时，所述第二供电模块不输出信号，此时所述线路驱动模块基于第一供电模块输的第一电压，对所述信号输出模块输出的信号进行放大。并且所述第一电压在任一时刻的幅值大于信号输出模块输出的信号在该时刻的幅值，所述第一电压在任一时刻的幅值与所述信号输出模块输出的信号在该时刻的幅值之差在设定范围内，即所述第一电压跟随当信号输出模块输出的信号变化，使得当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块输出的电压信号的幅值与该第一电压信号的幅值之差较小，也就是说所述线路驱动器能够有效利用所述第一电压对所述信号输出模块输出的信号进行放大，减少所述线路驱动模块通过所述第一电压产生的热量。当所述信号输出模块输出的信号幅值的绝对值大于或等于所述设定阈值时，即所述信号输出模块输出的信号幅值较大时，所述第二供电模块输出第二电压，所述线路驱动模块基于所述第一电压和所述第二电压，对所述信号输出模块输出的信号进行放大，使得当所述信号输出模块输出的信号幅值的绝对值大于或等于所述设定阈值时，所述第一供电模块以及所述第二供电模块能够为所述线路驱动模块提供幅值较大的电压信号，以满足所述线路驱动模块对所述信号输出模块输出的信号的放大要求。
由于所述信号输出模块输出的信号中幅值的绝对值大于或等于所述设定阈值的信号占比较小，且当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块输出的电压信号的幅值与所述第一电压信号的幅值之差较小，因此，本申请提供的线路驱动装置能够提高线路驱动模块对所述第一供电模块以及所述第二供电模块输出的电压的利用率，进而可以降低所述线路驱动装置的功耗以及散热成本。
一种可能的实施方式中，所述线路驱动装置还包括防倒灌模块，分别与所述第一供电模块的输出端以及所述线路驱动模块的第一输入端连接，用于在所述信号输出模块输出的第二信号小于设定阈值时导通，将所述第一供电模块输出的第一电压输出到所述线路驱动模块的第一输入端，在所述信号输出模块输出的第二信号大于或等于设定阈值时截止，防止所述第二供电模块输出的第二电压倒灌到所述第一供电模块中，影响所述第一供电模块以及所述线路驱动模块的性能。
一种可能的实施方式中，所述线路驱动装置还可以包括控制模块，所述控制模块的第一输入端与所述第一供电模块连接，所述控制模块的第二输入端与所述第二供电模块连接，所述控制模块的输出端与所述线路驱动模块的第一输入端连接。所述控制模块用于：比较所述信号输出模块输出的第一电压的幅值与所述第二供电模块输出的电压的幅值，输出所述第一电压与所述第二供电模块输出的电压中幅值较大的一个；其中，所述第二电压的幅值大于所述第一电压的幅值。
采用上述方案，当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块基于所述第一电压对所述信号输出模块输出的信号进行放大，当所述信号输出模块输出的信号幅值的绝对值大于或等于该设定阈值时，所述线路驱动模块基于所述第二供电模块输出的第二电压对所述信号输出模块输出的信号进行放大，以进一步降低所述线路驱动装置的功耗。
一种可能的实施方式中，所述第一供电模块在接收所述第一信号之后，根据所述第一信号在每个时刻的幅值，生成相应的第一电压之前，还用于：判断所述第一信号幅值的绝对值是否小于所述设定阈值，若是，则根据所述第一信号在每个时刻的幅值，生成相应的第一电压，否则，不输出信号。
采用上述方案，当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块基于所述第一电压对所述信号输出模块输出的信号进行放大，当所述信号输出模块输出的信号幅值的绝对值大于或等于该设定阈值时，所述线路驱动模块基于所述第二供电模块输出的第二电压对所述信号输出模块输出的信号进行放大，以进一步降低所述线路驱动装置的功耗。
一种可能的实施方式中，所述第一供电模块具体包括包络模块和跟踪电源模块。其中，所述包络模块，用于接收所述第一信号，根据所述第一信号生成所述第一信号的包络信号，并向所述跟踪电源模块输出所述第一信号的包络信号；所述跟踪电源模块，用于接收所述第一信号的包络信号，根据所述第一信号的包络信号，生成所述第一电压，并通过所述线路驱动模块的第一输入端输出所述第一电压。
一种可能的实施方式中，所述包络模块向所述跟踪电源模块输出所述第一信号的包络信号之前，还可以用于：对所述第一信号的包络信号进行平滑滤波，以去掉所述第一信号的包络信号中的部分高频成分，使得所述跟踪电源模块能够准确地跟随平滑滤波后的包络信号的变化，输出所述第一电压。
一种可能的实施方式中，当所述第一信号为数字信号时，所述跟踪电源模块具体包括络脉宽调制模块和信号生成模块，所述脉宽调制模块的第一输入端与所述包络模块的输出端连接，所述脉宽调制模块的输出端与所述信号生成模块的输入端连接。
其中，所述脉宽调制模块，用于接收所述第一信号的包络信号，根据所述第一信号的包络信号，生成所述包络信号对应的脉宽调制信号，并向所述信号生成模块输出 所述包络信号对应的脉宽调制信号。所述信号生成模块，用于接收所述脉宽调制信号，根据所述脉宽调制信号，生成所述第一电压，并通过所述线路驱动模块的第一输入端输出所述第一电压。
一种可能的实施方式中，所述跟踪电源模块还包括模数转换模块，用于接收所述第一电压，将所述第一电压转换为数字信号，并向所述脉宽调制模块反馈所述第一电压的数字信号；所述脉宽调制模块还用于：接收所述第一电压的数字信号，比较所述第一信号的包络信号与所述第一电压的数字信号，根据比较结果调整所述脉宽调制信号，使得所述第一电压能够准确地跟随所述第一信号变化。
一种可能的实施方式中，所述第二供电模块具体包括峰值检测模块和电荷泵模块。其中，所述峰值检测模块，用于接收所述第二信号，判断所述第二信号幅值的绝对值是否大于或等于所述设定阈值，若是，则输出第一控制信号，否则输出第二控制信号；其中，所述第一控制信号用于控制所述电荷泵模块生成并输出所述第二电压，所述第二控制信号用于控制所述电荷泵模块不输出信号。所述电荷泵模块，用于在所述第二信号幅值的绝对值大于或等于所述设定阈值时，接收所述第一控制信号，根据所述第一控制信号，生成并输出所述第二电压，在所述第二信号幅值的绝对值小于所述设定阈值时，接收所述第二控制信号，不输出信号。
一种可能的实施方式中，当所述第三信号为模拟信号时，所述线路驱动模块为线路驱动器。
一种可能的实施方式中，所述第三信号为数字信号时，所述线路驱动模块包括数模转换模块和线路驱动器，所述线路驱动器的第一输入端分别与所述第一供电模块以及所述第二供电模块连接，所述数模转换模块分别与所述信号输出模块和所述线路驱动器的第二输入端连接。
其中，所述数模转换模块，用于接收所述第三信号，将所述第三信号转换为模拟信号，并通过所述线路驱动器的第二输入端向所述线路驱动器输出所述第三信号的模拟信号；所述线路驱动器，用于接收所述第三信号的模拟信号，基于所述第一电压和所述第二电压对所述第三信号的模拟信号进行功率放大。
一种可能的实施方式中，所述第一电压、所述第二电压和所述第三信号同步，以避免所述线路驱动模块基于所述第一电压和所述第二电压对所述第三信号放大时，某一时刻所述第一电压和所述第二电压叠加后的电压无法满足所述第三信号在该时刻的放大需求导致所述线路驱动模块输出的信号失真。
一种可能的实施方式中，所述第一供电模块在接收所述第一信号之后，输出所述第一电压之前，还用于：对所述第一电压进行延时处理。
一种可能的实施方式中，所述第二供电模块接收所述第二信号之后，还用于：对所述第二信号进行延时处理。
一种可能的实施方式中，所述线路驱动模块接收所述第二信号之后，基于所述第一电压和所述第二电压对所述第三信号进行功率放大之前，还用于：对所述第二信号进行延时处理。
第二方面，本申请提供了一种线路驱动方法，应用于供电模块，该供电模块具有上述第一方面中第一供电模块和第二供电模块的功能，所述方法包括：
接收信号输出模块发送的第一信号，根据所述第一信号在每个时刻的幅值，生成 相应的第一电压，所述第一信号为待处理电压信号的数字信号或模拟信号，所述第一电压在任一时刻的幅值大于所述第一信号在该时刻的幅值，且所述第一电压在任一时刻的幅值与所述第一信号在该时刻的幅值之差在设定范围内；以及
接收所述信号输出模块发送的第二信号，判断所述第二信号幅值的绝对值是否大于或等于设定阈值，若是，则根据所述第二信号的幅值生成第二电压，并通过所述线路驱动模块的第一输入端向所述线路驱动模块输出所述第一电压以及所述第二电压，否则，通过线路驱动模块的第一输入端向所述线路驱动模块输出所述第一电压，所述第二信号为所述待处理电压信号的数字信号或模拟信号，所述第二电压的幅值大于所述第二信号的幅值，使得所述线路驱动模块基于所述第一电压和所述第二电压对第三信号进行功率放大，所述第三信号为所述信号输出模块通过所述线路驱动模块的第二输出端输出的所述待处理电压信号的数字信号或模拟信号。
采用上述方案，当信号输出模块输出的信号幅值的绝对值小于设定阈值时，即所述信号输出模块输出的信号幅值较小时，所述线路驱动模块基于所述第一电压，对所述信号输出模块输出的信号进行放大。并且所述第一电压在任一时刻的幅值大于信号输出模块输出的信号在该时刻的幅值，所述第一电压在任一时刻的幅值与所述信号输出模块输出的信号在该时刻的幅值之差在设定范围内，即所述第一电压跟随当信号输出模块输出的信号变化，使得当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块输出的电压信号的幅值与所述第一电压信号的幅值之差较小，也就是说所述线路驱动器能够有效利用所述第一电压对所述信号输出模块输出的信号进行放大，减少所述线路驱动模块通过所述第一电压产生的热量。当所述信号输出模块输出的信号幅值的绝对值大于或等于所述设定阈值时，即所述信号输出模块输出的信号幅值较大时，所述线路驱动模块基于所述第一电压和所述第二电压，对所述信号输出模块输出的信号进行放大，使得当所述信号输出模块输出的信号幅值的绝对值大于或等于所述设定阈值时，能够为所述线路驱动模块提供幅值较大的电压信号，以满足所述线路驱动模块对所述信号输出模块输出的信号的放大要求。
由于所述信号输出模块输出的信号中幅值的绝对值大于或等于所述设定阈值的信号占比较小，且当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块输出的电压信号的幅值与所述第一电压信号的幅值之差较小，因此，本申请提供的线路驱动方法能够提高线路驱动模块对供电电压的利用率，进而可以降低所述线路驱动装置的功耗以及散热成本。
一种可能的实施方式中，接收所述第一信号之后，根据所述第一信号在每个时刻的幅值，生成相应的第一电压之前，还判断所述第一信号幅值的绝对值是否小于所述设定阈值，若是，则根据所述第一信号在每个时刻的幅值，生成相应的第一电压，否则，根据所述第二信号的幅值生成第二电压。
采用上述方案，当所述信号输出模块输出的信号幅值的绝对值小于所述设定阈值时，所述线路驱动模块基于所述第一电压对所述信号输出模块输出的信号进行放大，当所述信号输出模块输出的信号幅值的绝对值大于或等于该设定阈值时，所述线路驱动模块基于所述第二电压对所述信号输出模块输出的信号进行放大，以进一步降低所述线路驱动装置的功耗。
一种可能的实施方式中，根据所述第一信号在每个时刻的幅值，生成相应的第一 电压具体包括以下步骤：根据所述第一信号生成所述第一信号的包络信号，并根据所述第一信号的包络信号，生成所述第一电压。
一种可能的实施方式中，根据所述第一信号生成所述第一信号的包络信号之后，根据所述第一信号的包络信号，生成所述第一电压之前，还可以对所述第一信号的包络信号进行平滑滤波，以去掉所述第一信号的包络信号中的部分高频成分。
一种可能的实施方式中，当所述第一信号为数字信号时，根据所述第一信号的包络信号，生成所述第一电压包括以下步骤：根据所述第一信号的包络信号，生成所述包络信号对应的脉宽调制信号，根据所述脉宽调制信号，生成所述第一电压。
一种可能的实施方式中，当所述第一信号为数字信号时，根据所述脉宽调制信号，生成所述第一电压之后，还将所述第一电压转换为数字信号，比较所述第一信号的包络信号与所述第一电压的数字信号，根据比较结果调整所述脉宽调制信号，使得所述第一电压能够准确地跟随所述第一信号变化。
一种可能的实施方式中，当所述第三信号为模拟信号时，所述线路驱动模块为线路驱动器。
一种可能的实施方式中，所述第一电压、所述第二电压和所述第三信号同步，以避免所述线路驱动模块基于所述第一电压和所述第二电压对所述第三信号放大时，某一时刻所述第一电压和所述第二电压叠加后的电压无法满足所述第三信号在该时刻的放大需求导致所述线路驱动模块输出的信号失真。
一种可能的实施方式中，接收所述第一信号之后，输出所述第一电压之前，还对所述第一电压进行延时处理。
一种可能的实施方式中，接收所述第二信号之后，输出所述第二电压之前，还用于：对所述第二信号进行延时处理。
综上，本申请提供了一种线路驱动装置及方法，采用本申请提供的方案，可以提高线路驱动模块对供电电压的利用率，进而可以降低所述线路驱动装置的功耗以及散热成本。
附图说明
图1为现有技术中线路驱动器的输出信号与线路驱动器的供电电压信号的示意图；
图2为现有技术中线路驱动装置的结构示意图；
图3为本申请实施例提供的一种线路驱动装置的结构示意图；
图4a为本申请实施例提供的一种线路驱动装置的结构示意图；
图4b为本申请实施例提供的一种线路驱动装置的结构示意图；
图5为本申请实施例提供的第一供电模块的结构示意图；
图6为本申请实施例中包络信号示意图；
图7为本申请实施例提供的一种跟踪电源模块的结构示意图；
图8为本申请实施例提供的另一种跟踪电源模块的结构示意图；
图9为本申请实施例提供的第二供电模块的结构示意图；
图10为本申请实施例提供的一种电荷泵模块的结构示意图；
图11为本申请实施例中线路驱动模块的输出信号与线路驱动模块的供电电压信号的示意图；
图12a为本申请实施例提供的一种线路驱动模块的结构示意图；
图12b为本申请实施例提供的另一种线路驱动模块的结构示意图；
图13a为本申请实施例提供的一种线路驱动装置的结构示意图；
图13b为本申请实施例提供的一种线路驱动装置的结构示意图；
图13c为本申请实施例提供的一种线路驱动装置的结构示意图；
图13d为本申请实施例提供的一种线路驱动装置的结构示意图；
图14为本申请实施例提供的一种线路驱动方法的流程示意图。
具体实施方式
现有技术中线路驱动模块200的结构如图2所示，包括信号输出模块201、峰值检测模块202、电荷泵模块203、延时模块204和线路驱动器205，其中，峰值检测模块202的输入端与信号输出模块201的输出端连接，峰值检测模块202的输出端与电荷泵模块202的输入端连接，电荷泵模块203的输出端与线路驱动器205的一个输入端连接，延时模块204的输入端与信号输出模块201的输出端连接，延时模块204的输出端与线路驱动器205的另一个输入端连接。
信号输出模块201用于向峰值检测模块202和延时模块204输出待放大信号。若线路驱动模块200设置在xDSL通信设备中，信号输出模块201可以为AFE。
峰值检测模块202用于接收信号输出模块201输出的待放大信号，检测该待放大信号的幅值，并判断该待放大信号幅值的绝对值是否大于设定值，若是，则输出第一控制信号，以控制电荷泵模块203中的电容进行放电，使得电荷泵模块202通过该电容放产生的电压信号与电荷泵模块203中为该电容充电的低压电源输出的电压信号叠加后的电压信号为线路驱动器205供电，否则，输出第二控制信号，以控制电荷泵模块203中的低压电源为电荷泵模块203中的电容充电，以及控制电荷泵模块203通过该低压电源为线路驱动器205供电。
电荷泵模块203用于接收峰值检测模块202发送的第一控制信号，根据该第一控制信号，输出电荷泵模块203中的电容放电产生的电压信号以及低压电源输出的电压信号叠加后的电压信号为线路驱动器205供电，或者接收峰值检测模块202发送的第二控制信号，根据该第二控制信号，通过电荷泵模块203中的低压电源对电荷泵模块203中的电容进行充电，并通过该低压电源输出的电压信号为线路驱动器205供电。
延时模块204用于对信号输出模块201输出的待放大信号进行延时处理，以使延时模块204输出的信号与电荷泵模块203输出的信号保持同步。
线路驱动器205用于基于电荷泵模块203输出的电压信号，对延时模块204输出的信号进行功率放大。
由于信号输出模块201输出的待放大信号中幅值的绝对值大于设定值的信号的占比较小，因此线路驱动器大部分时间都是由电荷泵模块中的低压电源供电。而电荷泵模块203中低压电源的输出电压不能太小，否则无法满足线路驱动器205对延时模块204输出的信号中幅值的绝对值大于设定值的信号的放大需求，使得在较长时间内线路驱动器205的供电电压与线路驱动器205输出的信号之间的电压差值较大(如图1所示)，线路驱动器205的供电电压大部分以热能的形式消耗在线路驱动器上，导致线路驱动器205的无效功耗较大。
为了解决现有技术中线路驱动器的无效功耗较大的问题，本申请提出了一种线路驱动装置及方法，以提高线路驱动器的驱动效率，减少无效功耗。
需要说明的是，在本申请实施例的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
参阅图3所示，本申请实施例提供的一种线路驱动装置300包括信号输出模块310、第一供电模块320、第二供电模块330以及线路驱动模块340。其中，第一供电模块320与信号输出模块310、线路驱动模块340的第一输入端连接，第二供电模块330与信号输出模块310、线路驱动模块340的第一输入端连接，线路驱动模块340的第二输入端与信号输出模块310相连。
信号输出模块310，用于向第一供电模块320输出第一信号，向第二供电模块330输出第二信号以及向线路驱动模块340输出第三信号。其中，该第一信号为待处理电压信号的数字信号或模拟信号，该第二信号为该待处理电压信号的数字信号或模拟信号，该第三信号为该待处理电压信号的数字信号或模拟信号。
第一供电模块320，用于接收信号输出模块310输出的第一信号，根据该第一信号在每个时刻的幅值，生成相应的第一电压，并通过线路驱动模块340的第一输入端向线路驱动模340块输出该第一电压。其中，该第一电压在任一时刻的幅值大于该第一信号在该时刻的幅值，且该第一电压在任一时刻的幅值与该第一信号在该时刻的幅值之差在设定范围内。
第二供电模块330，用于接收信号输出模块310输出的第二信号，判断该第二信号幅值的绝对值是否大于或等于设定阈值，若是，则根据该第二信号的幅值生成第二电压，并通过线路驱动模块340的第一输入端向线路驱动模块340输出该第二电压，否则，不输出信号。其中，该第二电压的幅值大于该第一电压的幅值。
线路驱动模块340，用于接收信号输出模块310输出的第三信号，并基于第一供电模块320输出的第一电压和第二供电模块330输出的第二电压对该第三信号进行功率放大。
本申请实施例提供的上述线路驱动装置300中，当信号输出模块310输出的信号幅值的绝对值小于设定阈值时，即信号输出模块310输出的信号幅值较小时，第二供电模块330不输出信号，此时，线路驱动模块340基于第一供电模块320输的第一电压，对信号输出模块310输出的信号进行放大。并且该第一电压在任一时刻的幅值大于信号输出模块310输出的信号在该时刻的幅值，该第一电压在任一时刻的幅值与信号输出模块310输出的信号在该时刻的幅值之差在设定范围内，即该第一电压跟随当信号输出模块310输出的信号变化，使得当信号输出模块310输出的信号幅值的绝对值小于设定阈值时，线路驱动模块340输出的电压信号的幅值与该第一电压信号的幅值之差较小，也就是说线路驱动器340能够有效利用该第一电压对信号输出模块310输出的信号进行放大，减少线路驱动模块340通过该第一电压产生的热量。
当信号输出模块310输出的信号幅值的绝对值大于或等于该设定阈值时，即信号输出模块310输出的信号幅值较大时，第二供电模块330输出第二电压，线路驱动模块340基于该第一电压和该第二电压，对信号输出模块310输出的信号进行放大，使得当信号输出模块310输出的信号幅值的绝对值大于或等于该设定阈值时，第一供电模块320以及第二供电模块330能够为线路驱动模块340提供幅值较大的电压信号， 以满足线路驱动模块340对信号输出模块310输出的信号的放大要求。
由于线路驱动装置300中信号输出模块输出的信号中幅值的绝对值大于或等于设定阈值的信号占比较小，且当信号输出模块310输出的信号幅值的绝对值小于设定阈值时，线路驱动模块340输出的电压信号的幅值与该第一电压信号的幅值之差较小，因此，本申请实施例提供的线路驱动装置能够提高线路驱动模块340对第一供电模块320以及第二供电模块330输出的电压的利用率，进而可以降低线路驱动装置300的功耗以及散热成本。
在具体实施中，若线路驱动装置300内置于xDSL通信设备中，信号输出模块310可以为DFE，或者信号输出模块可以为AFE，或者信号输出模块310集成DFE以及AFE。当信号输出模块310输出的第一信号为数字信号时，该第一信号为DFE输出的信号，当该第一信号为模拟信号时，该第一信号为AFE输出的信号；当信号输出模块310输出的第二信号为数字信号时，该第二信号为DFE输出的信号，当该第二信号为模拟信号时，该第二信号为AFE输出的信号；当信号输出模块310输出的第三信号为数字信号时，该第三信号为DFE输出的信号，当该第三信号为模拟信号时，该第三信号为AFE输出的信号。
若线路驱动装置300用于信号传输质量测试、设备性能测试等场景，信号输出模块310还可以是信号发生器。
在具体实施中，第一供电模块320输出的第一电压的幅值，与信号输出模块310输出的第一信号的幅值之差需要满足的设定范围可以根据经验值或者仿真结果确定，以使该第一电压的幅值与该第一信号的幅值之差较小，并且在线路驱动模块340接收的第三信号的幅值小于设定阈值时，该第一电压的幅值能够满足线路驱动模块340对该第三信号的放大需求。
一个可能的实施方式中，参阅图4a所示，线路驱动装置300还可以包括控制模块350，控制模块350的第一输入端与第一供电模块320连接，控制模块350的第二输入端与第二供电模块330连接，控制模块350的输出端与线路驱动模块340的第一输入端连接。控制模块350用于比较信号输出模块310输出的第一电压的幅值与第二供电模块330输出的电压的幅值，输出该第一电压与第二供电模块330输出的电压中幅值较大的一个，其中，第二供电模块330输出的第二电压幅值大于第一供电模块320输出第一电压幅值。
当信号输出模块310输出的第一信号幅值的绝对值小于设定阈值时，第一供电模块310输出第一电压，第二供电模块330不输出信号，控制模块350输出该第一电压；当信号输出模块310输出的第一信号幅值的绝对值大于或等于该设定阈值时，第一供电模块320输出该第一电压，第二供电模块330输出第二电压，该第二电压大于该第一电压，控制模块350输出该第二电压，使得当信号输出模块310输出的信号幅值的绝对值小于设定阈值时，线路驱动模块340基于第一供电模块320输出的第一电压对信号输出模块输出的信号进行放大，当信号输出模块310输出的信号幅值的绝对值大于或等于该设定阈值时，线路驱动模块350基于第二供电模块330输出的第二电压对信号输出模块输出的信号进行放大，以进一步降低线路驱动装置300的功耗。
另一个可能的实施方式中，参阅图4b所示，线路驱动装置300还包括防倒灌模块360，分别与第一供电模块320的输出端以及线路驱动模块340的第一输入端连接，用 于在信号输出模块310输出的第二信号小于设定阈值时导通，将第一供电模块320输出的第一电压输出到线路驱动模块340的第一输入端，在信号输出模块310输出的第二信号大于或等于设定阈值时截止，防止第二供电模块330输出的第二电压倒灌到第一供电模块320中，影响第一供电模块320以及线路驱动模块340的性能。具体地，防倒灌模块360可以为二极管，其中，二极管的正极与第一供电模块的输出端连接，二极管的负极与线路驱动模块340的第一输入端连接。
在具体实施中，第一供电模块320在接收信号输出模块310输出的第一信号之后，根据该第一信号在每个时刻的幅值，生成相应的第一电压之前，还可以用于：判断该第一信号幅值的绝对值是否小于该设定阈值，若是，则根据该第一信号在每个时刻的幅值，生成相应的第一电压，否则，不输出信号，使得当信号输出模块310输出的第一信号幅值的绝对值小于设定阈值时，线路驱动模块340基于第一供电模块320输出的第一电压对信号输出模块输出的信号进行放大，当信号输出模块310输出的信号幅值的绝对值大于或等于该设定阈值时，线路驱动模块340基于第二供电模块330输出的第二电压对信号输出模块输出的信号进行放大，以进一步降低线路驱动装置300的功耗。
一个具体的实施方式中，第一供电模块320具体包括包络模块321和跟踪电源模块322，包络模块321的输入端与信号输出模块310的输出端连接，包络模块321的输出端与跟踪电源模块322的输入端连接，跟踪电源模块322的输出端与线路驱动模块的第一输入端连接，参阅图5所示。
包络模块321，用于接收信号输出模块310输出的第一信号，根据该第一信号生成该第一信号的包络信号，并向跟踪电源模块322输出该第一信号的包络信号。跟踪电源模块322，用于接收该第一信号的包络信号，根据该第一信号的包络信号，生成该第一电压，并通过线路驱动模块340的第一输入端输出该第一电压。其中，该第一信号的包络信号为该第一信号中的极值构成的信号，相较于该第一信号，该第一信号的包络信号中的高频成分较少，即该第一信号的包络信号的变化速率较小，以满足跟踪电源模块322的跟踪性能，根据该第一信号的包络信号产生该第一电压。例如，该第一信号以及该第一信号的包络信号如图6所示。
具体地，为了进一步满足跟踪电源模块322的跟踪性能，包络模块321还用于：对该第一信号的包络信号进行平滑滤波，以去掉该第一信号的包络信号中的部分高频信号。
在具体实施中，当信号输出模块310输出的第一信号为数字信号时，跟踪电源模块322具体包括络脉宽调制模块701和信号生成模块702，其中，脉宽调制模块701的第一输入端与包络模块321的输出端连接，脉宽调制模块701的输出端与信号生成模块702的输入端连接，参阅图7所示。
脉宽调制模块701，用于接收该第一信号的包络信号，根据该第一信号的包络信号，生成该第一信号的包络信号对应的脉宽调制信号，并向信号生成模块702输出该第一信号的包络信号对应的脉宽调制信号，使得脉宽调制模块701能够在数字域对该第一信号的脉宽调制，脉宽调制的实现比较容易，进而可以进一步减少线路驱动模块的成本。
信号生成模块702，用于接收该脉宽调制信号，根据该脉宽调制信号，生成该第 一电压，并通过线路驱动模块340的第一输入端输出该第一电压。
为了提高信号生成模块702输出的第一电压的准确性，跟踪电源模块322还包括模数转换模块801，数模转换模块801的输入端与信号生成模块702的输出端连接，数模转换模块801的输出端与脉宽调制模块701的第二输入端连接，如图8所示。
其中，模数转换模块801，用于接收该第一电压，将该第一电压转换为数字信号，并向脉宽调制模块701反馈该第一电压的数字信号。脉宽调制模块701还用于：接收该第一电压的数字信号，比较该第一信号的包络信号与模数转换模块801输出的该第一电压的数字信号，根据比较结果调整该脉宽调制信号。
一个具体的实施方式中，脉宽调制模块701根据比较结果调整该脉宽调制信号时，具体用于：当该第一信号的包络信号的幅值大于该第一电压的数字信号的幅值时，增大该脉宽调制信号的占空比，以增大信号生成模块702输出的第一电压的幅值；当该第一信号的包络信号幅值小于该第一电压的数字信号的幅值时，减小该脉宽调制信号的占空比，以减小信号生成模块702输出的第一电压的幅值，进而使得该第一电压能够准确地跟随该第一信号变化。
可选地，参阅图9所示，第二供电模块330具体包括峰值检测模块331和电荷泵模块332，峰值检测模块331的输入端与信号输出模块的输出端连接，峰值检测模块331的输出端与电荷泵模块332的输入端连接，电荷泵模块332的输出端与线路驱动模块的第一输入端连接。
其中，峰值检测模块331，用于接收信号输出模块310输出的第二信号，判断所述第二信号幅值的绝对值是否大于或等于设定阈值，若是，则输出第一控制信号，否则输出第二控制信号，该第一控制信号用于控制电荷泵模块332生成并输出该第二电压，该第二控制信号用于控制电荷泵模块332不输出信号。电荷泵模块332，用于在该第二信号幅值的绝对值大于或等于所述设定阈值时，接收该第一控制信号，根据该第一控制信号，生成并输出该第二电压，在该第二信号幅值的绝对值小于该设定阈值时，接收该第二控制信号，不输出信号。
一个具体的实施例中，电荷泵模块332包括电压源U1、第一三极管Q1、第二三极管Q2、二极管D1、电容C1以及镜像电流源I1，如图10所示。电压源U1的正极与二极管D1的正极连接，电压源U1的负极接地。当第一三极管Q1为NPN型三极管时，第一三极管Q1的基极与峰值检测模块331的输出端连接，第一三极管Q1的集电极与二极管D1的正极连接，第一三极管Q1的发射极与镜像电流源I1连接，当第一三极管Q1为PNP型三极管时，第一三极管Q1的基极与峰值检测模块331的输出端连接，第一三极管Q1的发射极与二极管D1的正极连接，第一三极管Q1的集电极与镜像电流源I1连接。当第二三极管Q2为NPN型三极管时，第二三极管Q2的基极与峰值检测模块331的输出端连接，第二三极管Q2的集电极与二极管D1的负极连接，第二三极管Q2的发射极与线路驱动模块340的第一输入端连接，当第二三极管Q2为PNP型三极管时，第二三极管Q2的基极与峰值检测模块331的输出端连接，第二三极管Q2的发射极与二极管D1的负极连接，第二三极管Q2的集电极与线路驱动模块340的第一输入端连接。电容C1分别与二极管D1的负极和镜像电流源I1连接。
其中，当峰值检测模块331输出第一控制信号时，第一三极管Q1和第二三极管Q2导通，二极管D1截止，电压源U1的输出端经过三极管Q1与电容C1的负极连接， 此时电压源Q1通过第一三极管Q1、电容C1和第二三极管Q2为线路驱动模块340供电，第二三极管Q2输出的电压(电荷泵模块332输出的第二电压)为电压源U1的电压和电容C1放电产生的电压之和；当峰值检测模块331输出第二控制信号时，第一三极管Q1和第二三极管Q2截止，二极管D1导通，电压源U1通过镜像电流源I1为电容C1充电，第二三极管Q2输出的电压(电荷泵模块332输出的第二电压)为0。
在具体实施中，为了避免在信号输出模块310输出的第二信号幅值接近该设定阈值时，电荷泵模块322输出的第二电压幅值发生跳变产生的噪声对线路驱动装置300性能的影响，峰值检测模块331确定该第二信号幅值的绝对值小于该设定阈值之后，还用于：判断该第二信号的幅值的绝对值是否大于设定下限值，若是，则输出第三控制信号，否则输出该第二控制信号，其中，该三控制信号用于控制电荷泵模块332输出第三电压，该第三电压大于该第一电压，且小于该第二电压；电荷泵模块332还用于：当该第二信号幅值的绝对值大于该设定下限值，且小于该设定阈值时，接收该第三控制信号，根据该第三控制信号，输出该第三电压。
具体地，如图10所示的电荷泵模块332，当峰值检测模块331输出第三控制信号时，电荷泵模块332对该第三控制信号进行延时处理后输出到第一三极管Q1，以及直接将该第三控制信号输出到第二三极管Q2，使得电荷泵模块332能够先控制第二三极管Q2以及二极管D1导通，通过电压源U1、二极管D1以及第二三极管Q2为线路驱动模块340供电，此时第二三极管Q2输出的电压为电压源U1的电压(即该第三电压)，待该第二信号的幅值的绝对值大于设定阈值时再控制第一三极管Q1导通，通过电压源U1、第一三极管Q1、镜像电流源I1、电容C1、二极管D1以及第二三极管Q2为线路驱动模块340供电，此时第二三极管Q2输出的电压为电压源U1的电压和电容C1放电产生的电压之和。
在信号输出模块310输出的第二信号幅值的绝对值大于该设定下限值，且小于该设定阈值时，峰值检测模块331还输出该第三控制信号，以控制电荷泵模块332输出该第三电压的场景下，线路驱动装置300中线路驱动模块340输出的差分电压信号V outp和V outn，第一供电模块320输出的第一电压与第二供电模块330输的第二电压叠加后得到的正向电压V ccp以及负向电压V eep如图11所示。由图11可知，当信号输出模块310输出的信号幅值较小时，线路驱动模块340输出的电压信号幅值，与该第一电压与该第二电压叠加后得到的信号幅值的差值较小。
在具体实施中，当信号输出模块310输出的第三信号为模拟信号时，线路驱动模块340为线路驱动器341，如图12a所示。当该第三信号为数字信号时，线路驱动模块340包括线路驱动器341和数模转换模块342，线路驱动器342的第一输入端与第一供电模块320以及第二供电模块330连接，数模转换模块341的输入端与信号输出模块310的输出端连接，数模转换模块341的输出端与线路驱动器342的第二输入端连接，如图12b所示。
其中，数模转换模341，用于接收该第三信号，将该第三信号转换为模拟信号，并通过线路驱动器342的第二输入端向线路驱动器342输出该第三信号的模拟信号；线路驱动器342，用于接收该第三信号的模拟信号，基于第一供电模块320输出的第一电压和第二供电模块330输出的第二电压对该第三信号的模拟信号进行功率放大。
可选地，第一供电模块320输出的第一电压、第二供电模块330输出的第二电压 和信号输出模块310输出的第三信号同步，以避免线路驱动模块340基于该第一电压和该第二电压对该第三信号放大时，某一时刻该第一电压和该第二电压叠加后的电压无法满足该第三信号在该时刻的放大需求导致线路驱动模块340输出的信号失真。
在具体实施中，第一供电模块320在接收信号输出模块310输出的第一信号之后，输出第一电压之前，还可以用于：对该第一电压进行延时处理，以使第一供电模块320输出的第一电压、第二供电模块330输出的第二电压和信号输出模块310输出的第三信号同步。
在具体实施中，第二供电模块330接收信号输出模块310输出的第二信号之后，还可以用于：对该第二信号进行延时处理，以使第一供电模块320输出的第一电压、第二供电模块330输出的第二电压和信号输出模块310输出的第三信号同步。
在具体实施中，线路驱动模块340接收信号输出模块310输出的第三信号之后，基于第一供电模块320输出的第一电压和第二供电模块330输出的第二电压对该第三信号进行功率放大之前，还可以用于：对该第二信号进行延时处理，以使第一供电模块320输出的第一电压、第二供电模块330输出的第二电压和信号输出模块310输出的第三信号同步。
在具体实施中，第一供电模块320、第二供电模块330以及线路驱动模块340中至少有两个模块还包括延时模块，分别用于对该至少两个模块对应的输入信号进行延时处理，使得第一供电模块320输出的第一电压、第二供电模块330输出的第二电压和信号输出模块310输出的第三信号同步。线路驱动装置300可以通过但不限于以下三种方式实现该第一电压、该第二电压以及该第三信号同步：
方式一，第一供电模块320还包括第一延时模块323，第二供电模块320还包括第二延时模块333。第一延时模块323的输入端与信号输出模块310的输出端连接，第一延时模块323的输出端与包络模块321的输入端连接，用于接收信号输出模块310输出的第一信号，对该第一信号进行延时处理；或者，第一延时模块323的输入端与包络模块321的输出端连接，第一延时模块323的输出端与跟踪电源模块322的输入端连接，用于包络模块321输出的该第一信号的包络信号，对该第一信号的包络信号进行延时处理。
第二延时模块333的输入端与信号输出模块310的输出端连接，第二延时模块333的输出端与峰值检测模块331的输入端连接，用于接收信号输出模块310输出的第二信号，对该第二信号进行延时处理；或者，第二延时模块333的输入端与峰值检测模块331的输出端连接，第二延时模块333的输出端与电荷泵模块332的输入端连接，用于接收峰值检测模块331输出的第一控制信号或者第二控制信号，对该第一控制信号或者该第二控制信号进行延时处理。例如，第一供电模块320还包括第一延时模块323，第二供电模块320还包括第二延时模块333时，线路驱动装置300的结构如图13a所示。
方式二，第一供电模块320还包括第一延时模块323，线路驱动模块340还包括第三延时模块343。第一延时模块323的输入端与信号输出模块310的输出端连接，第一延时模块323的输出端与包络模块321的输入端连接，用于接收信号输出模块310输出的第一信号，对该第一信号进行延时处理；或者，第一延时模块323的输入端与包络模块321的输出端连接，第一延时模块323的输出端与跟踪电源模块322的输入 端连接，用于包络模块321输出的该第一信号的包络信号，对该第一信号的包络信号进行延时处理。
当信号输出模块310输出的第三信号为模拟信号时，第三延时模块343的输入端与信号输出模块310的输出端连接，第三延时模块343的输出端与线路驱动器342的第二输入端连接，用于接收该第三信号，对该第三信号进行延时处理。当信号输出模块310输出的第三信号为数字信号时，第三延时模块343的输入端与数模转换模块341的输出端连接，第三延时模块343的输出端与线路驱动器342的第二输入端连接，用于接收该第三信号的模拟信号，对该第三信号的模拟信号进行延时处理；或者，第三延时模块343的输入端与信号输出模块310的输出端连接，第三延时模块343的输出端与数模转换模块341的输入端连接，用于接收该第三信号，对该第三信号进行延时处理。例如，第一供电模块320还包括第一延时模块323，线路驱动模块340还包括第三延时模块343时，线路驱动装置300的结构如图13b所示。
方式三、第二供电模块330还包括第二延时模块333，线路驱动模块340还包括第三延时模块343。其中，第二延时模块333和第三延时模块343的连接方式以及功能，与上述方式一以及实施方式二中第二延时模块333以及第三延时模块343的连接方式以及功能相同，参见具体的实施方式一以及具体的实施方式二中的相关描述，此处不再赘述。例如，第二供电模块330还包括第一延时模块333，线路驱动模块340还包括第三延时模块343时，线路驱动装置300的结构如图13c所示。
方式四，第一供电模块320还包括第一延时模块323，第二供电模块320还包括第二延时模块333，线路驱动模块340还包括第三延时模块343。其中，第一延时模块323、第二延时模块333以及第三延时模块343的连接方式以及功能，与上述方式一以及方式二中第一延时模块323、第二延时模块333以及第三延时模块343的连接方式以及功能相同，参见具体的实施方式一以及具体的实施方式二中的相关描述，此处不再赘述。例如，第一供电模块320还包括第一延时模块323，第二供电模块320还包括第二延时模块333，线路驱动模块340还包括第三延时模块343时，线路驱动装置300的结构如图13d所示。
基于以上实施例，本申请还提供一种线路驱动方法。该方法可视为线路驱动装置300中第一供电模块以及第二供电模块所执行的方法。参见图14，该方法包括如下步骤：
S1401：接收信号输出模块发送的第一信号，根据该第一信号在每个时刻的幅值，生成相应的第一电压。
其中，该第一信号为待处理电压信号的数字信号或模拟信号，该第一电压在任一时刻的幅值大于该第一信号在该时刻的幅值，且该第一电压在任一时刻的幅值与该第一信号在该时刻的幅值之差在设定范围内。
S1402：接收该信号输出模块发送的第二信号，判断所述第二信号幅值的绝对值是否大于或等于设定阈值，若是，执行步骤S1403，否则执行步骤S1404。其中，该第二信号为该待处理电压信号的数字信号或模拟信号。
需要说明的是，本申请实施例并不对S1401和S1402的先后顺序进行限定，可以先执行S1401，后执行S1402，也可以先执行S1402，后执行S1401，还可以同时执行S1401和S1402。
S1403：根据该第二信号的幅值生成第二电压，并通过线路驱动模块的第一输入端向该线路驱动模块输出该第一电压以及该第二电压。其中，该第二电压的幅值大于所述第二信号的幅值。
S1404：通过线路驱动模块的第一输入端向该线路驱动模块输出该第一电压。
相应地，该线路驱动模块基于该第一电压和该第二电压对第三信号进行功率放大，该第三信号为该信号输出模块通过该线路驱动模块的第二输出端输出的待处理电压信号的数字信号或模拟信号。
需要说明的是，图14所示方法可视为线路驱动装置300中第一供电模块以及第二供电模块所执行的方法，图14所示方法中未详尽描述的实现方式可参见线路驱动装置300的相关描述。
综上，本申请实施例提供一种线路驱动装置及方法，采用本申请实施例提供的方案，可以提高线路驱动模块对供电电压的利用率，进而可以降低所述线路驱动装置的功耗以及散热成本。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (13)

  1. 一种线路驱动装置，其特征在于，包括：信号输入模块、第一供电模块、第二供电模块以及线路驱动模块；
    所述第一供电模块与所述信号输出模块、所述线路驱动模块的第一输入端连接；所述第二供电模块与所述信号输出模块、所述线路驱动模块的第一输入端连接；所述线路驱动模块的第二输入端与所述信号输出模块相连；
    所述信号输出模块，用于向所述第一供电模块输出第一信号，向所述第二供电模块输出第二信号以及向所述线路驱动模块输出第三信号；所述第一信号为待处理电压信号的数字信号或模拟信号，所述第二信号为所述待处理电压信号的数字信号或模拟信号，所述第三信号为所述待处理电压信号的数字信号或模拟信号；
    所述第一供电模块，用于接收所述第一信号，根据所述第一信号在每个时刻的幅值，生成相应的第一电压，并通过所述线路驱动模块的第一输入端向所述线路驱动模块输出所述第一电压；所述第一电压在任一时刻的幅值大于所述第一信号在该时刻的幅值，且所述第一电压在任一时刻的幅值与所述第一信号在该时刻的幅值之差在设定范围内；
    所述第二供电模块，用于接收所述第二信号，判断所述第二信号幅值的绝对值是否大于或等于设定阈值，若是，则根据所述第二信号的幅值生成第二电压，并通过所述线路驱动模块的第一输入端向所述线路驱动模块输出所述第二电压，否则，不输出信号，所述第二电压的幅值大于所述第二信号的幅值；
    所述线路驱动模块，用于接收所述第三信号，并基于所述第一电压和所述第二电压对所述第三信号进行功率放大。
  2. 如权利要求1所述的装置，其特征在于，所述装置还包括控制模块，所述控制模块的第一输入端与所述第一供电模块连接，所述控制模块的第二输入端与所述第二供电模块连接，所述控制模块的输出端与所述线路驱动模块的第一输入端连接；
    所述控制模块，用于比较所述第一电压的幅值与所述第二供电模块输出的电压的幅值，输出所述第一电压与所述第二供电模块输出的电压中幅值较大的一个；其中，所述第二电压的幅值大于所述第一电压的幅值。
  3. 如权利要求1所述的装置，其特征在于，所述第一供电模块在接收所述第一信号之后，根据所述第一信号在每个时刻的幅值，生成相应的第一电压之前，还用于：
    判断所述第一信号幅值的绝对值是否小于所述设定阈值，若是，则根据所述第一信号在每个时刻的幅值，生成相应的第一电压，否则，不输出信号。
  4. 如权利要求1或2所述的装置，其特征在于，所述第一供电模块具体包括包络模块和跟踪电源模块；
    所述包络模块，用于接收所述第一信号，根据所述第一信号生成所述第一信号的包络信号，并向所述跟踪电源模块输出所述第一信号的包络信号；
    所述跟踪电源模块，用于接收所述第一信号的包络信号，根据所述第一信号的包络信号，生成所述第一电压，并通过所述线路驱动模块的第一输入端输出所述第一电压。
  5. 如权利要求4所述的装置，其特征在于，当所述第一信号为数字信号时，所述 跟踪电源模块具体包括络脉宽调制模块和信号生成模块，所述脉宽调制模块的第一输入端与所述包络模块的输出端连接，所述脉宽调制模块的输出端与所述信号生成模块的输入端连接；
    所述脉宽调制模块，用于接收所述第一信号的包络信号，根据所述第一信号的包络信号，生成所述包络信号对应的脉宽调制信号，并向所述信号生成模块输出所述包络信号对应的脉宽调制信号；
    所述信号生成模块，用于接收所述脉宽调制信号，根据所述脉宽调制信号，生成所述第一电压，并通过所述线路驱动模块的第一输入端输出所述第一电压。
  6. 如权利要求5所述的装置，其特征在于，所述跟踪电源模块还包括模数转换模块，用于接收所述第一电压，将所述第一电压转换为数字信号，并向所述脉宽调制模块反馈所述第一电压的数字信号；
    所述脉宽调制模块还用于：接收所述第一电压的数字信号，比较所述第一信号的包络信号与所述第一电压的数字信号，根据比较结果调整所述脉宽调制信号。
  7. 如权利要求1-6任意一项所述的装置，其特征在于，所述第二供电模块具体包括峰值检测模块和电荷泵模块；
    所述峰值检测模块，用于接收所述第二信号，判断所述第二信号幅值的绝对值是否大于或等于所述设定阈值，若是，则输出第一控制信号，否则输出第二控制信号；其中，所述第一控制信号用于控制所述电荷泵模块生成并输出所述第二电压，所述第二控制信号用于控制所述电荷泵模块不输出信号；
    所述电荷泵模块，用于在所述第二信号幅值的绝对值大于或等于所述设定阈值时，接收所述第一控制信号，根据所述第一控制信号，生成并输出所述第二电压，在所述第二信号幅值的绝对值小于所述设定阈值时，接收所述第二控制信号，不输出信号。
  8. 如权利要求1-7任意一项所述的装置，其特征在于，当所述第三信号为模拟信号时，所述线路驱动模块为线路驱动器。
  9. 如权利要求1-7任意一项所述的装置，其特征在于，当所述第三信号为数字信号时，所述线路驱动模块具体包括数模转换模块和线路驱动器，所述线路驱动器的第一输入端分别与所述第一供电模块以及所述第二供电模块连接，所述数模转换模块分别与所述信号输出模块和所述线路驱动器的第二输入端连接；
    所述数模转换模块，用于接收所述第三信号，将所述第三信号转换为模拟信号，并通过所述线路驱动器的第二输入端向所述线路驱动器输出所述第三信号的模拟信号；
    所述线路驱动器，用于接收所述第三信号的模拟信号，基于所述第一电压和所述第二电压对所述第三信号的模拟信号进行功率放大。
  10. 如权利要求1-9任意一项所述的装置，其特征在于，所述第一电压、所述第二电压和所述第三信号同步。
  11. 如权利要求10所述的装置，其特征在于，所述第一供电模块在接收所述第一信号之后，输出所述第一电压之前，还用于：对所述第一电压进行延时处理。
  12. 如权利要求10或11所述的装置，其特征在于，所述第二供电模块接收所述第二信号之后，输出所述第二电压之前，还用于：对所述第二信号进行延时处理。
  13. 如权利要求10-12任意一项所述的装置，其特征在于，所述线路驱动模块接收所述第二信号之后，基于所述第一电压和所述第二电压对所述第三信号进行功率放 大之前，还用于：对所述第二信号进行延时处理。
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CN110233806B (zh) 2020-10-16

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