CN111030449A - Nfc型读写器的开关模式电源 - Google Patents

Nfc型读写器的开关模式电源 Download PDF

Info

Publication number
CN111030449A
CN111030449A CN201910950399.2A CN201910950399A CN111030449A CN 111030449 A CN111030449 A CN 111030449A CN 201910950399 A CN201910950399 A CN 201910950399A CN 111030449 A CN111030449 A CN 111030449A
Authority
CN
China
Prior art keywords
coupled
power supply
switched mode
mode power
reader
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910950399.2A
Other languages
English (en)
Other versions
CN111030449B (zh
Inventor
F·阿居
S·特洛徐特
V·孔奇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stmicroelectronics Development Co ltd
STMicroelectronics France SAS
Original Assignee
STMicroelectronics SA
STMicroelectronics Razvoj Polprevodnikov doo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STMicroelectronics SA, STMicroelectronics Razvoj Polprevodnikov doo filed Critical STMicroelectronics SA
Publication of CN111030449A publication Critical patent/CN111030449A/zh
Application granted granted Critical
Publication of CN111030449B publication Critical patent/CN111030449B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G06K19/0725—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement being a circuit for emulating a plurality of record carriers, e.g. a single RFID tag capable of representing itself to a reader as a cloud of RFID tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
    • H02M1/0019—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters the disturbance parameters being load current fluctuations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Dc-Dc Converters (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

本公开的各实施例涉及NFC型读写器的开关模式电源。适于利用无线装置无线地交换信息的读写器。读写器包括被配置为生成调制信号的信号发生器。发射/接收级被配置为由调制信号驱动。开关模式电源被配置为给发射/接收级供电。开关模式电源包括根据调制信号而被控制的功率开关。

Description

NFC型读写器的开关模式电源
相关申请的交叉引用
本申请要求于2018年10月9日提交的法国专利申请号1859339的优先权，该申请通过引用并入本文。
技术领域
本发明的实施例涉及用于NFC系统的开关模式电源。
背景技术
近场通信(NFC)是一组用于无线装置的标准，特别是智能手机和类似的设备，用于在两个设备之间的无线电通信，通过共同接触或者使它们接近来实现，通常在10cm以下的距离。
NFC使用位于彼此近场内的两个环形天线之间的电磁感应，有效地形成了空心变压器。其工作在例如13.56MHz的频率下。NFC包括发起者和目标。发起者或读写器主动生成能够为被动目标供电的RF场，该被动目标是称为应答器或“标签”的无源芯片。这使得NFC目标能够采用简单形式因素，如不使用电池的贴纸、钥匙链或卡片。
读写器到标签的通信由读写器遵循一些标准对载波信号的幅度调制来执行。
接收由读写器生成的电磁场的无线设备或接收器可以是无源(标签)或有源的。在第一种情况下，标签不生成电磁场，然而在第二种情况下，接收器生成电磁场，并且读写器和接收器之间的通信使用有源负载调制(ALM)。
NFC技术在ISO/IEC 18092、ISO/IEC 21481和NFC FORUM文件中标准化，但是包含了现存的标准，包括在ISO/IEC 14443中标准化的A类协议和B类协议。
A类协议，也称为ISO 14443A和NFC-A技术，基于使用调制的密勒脉冲位置的通断键控(OOK)调制。
通常，用于NFC读写器的开关模式电源耦合到读写器的发射/接收级(负载)。发射/接收级是开关模式电源的负载。
设计开关模式电源是用于将未调节的输入电压转变成施加到负载上的调节的输出电压。开关模式电源通常包括参考电压来调节输出电压。
当耦合到开关模式电源的这样的负载在信息发送和/或接收期间以突然且快速的方式改变时，这样的开关模式电源的输出电压不能以快速适应的方式调节，这通常会导致输出电压上本领域技术人员通常所知的过冲或下冲。在极端负载暂态期间过冲或下冲会导致开关模式电源在电压域发生故障。
需要提供低复杂度和低消耗的技术解决方案，使得能够确保开关模式电源的功率调节适于负载变化
发明内容
本发明的实施例涉及本领域的技术人员通常所知的缩写为SMPS的开关模式电源。具体的实施例涉及本领域的技术人员通常所知的缩写为NFC系统的开关模式电源，该开关模式电源适于射频系统(比如近场通信系统)。例如，实施例涉及用于NFC系统中调制的开关模式电源的功率调节。
根据一个方面，提出了读写器，该读写器适于提供无线装置无线交换信息。这样的无线装置可以是使用负载调制的无源响应器或有源响应器。读写器实际上可以是在读写器模式下模拟的读写器或智能手机。
在一个实施例中，读写器包括被配置为生成调制信号的信号发生器。发射/接收级被配置为由调制信号驱动。开关模式电源被配置为给发射/接收级供电。开关模式电源包括被配置为通过调制信号控制的功率开关。
有利的是，这样的开关模式电源可以通过仅使用表示负载变化的调制信号来控制开关模式电源的功率开关，换言之，是耦合到开关模式电源的发射/接收级。
以这种方式，开关模式电源的调节的输出电压跟随负载的变化，并且可以减少在极端负载暂态期间可能的过冲或下冲。
根据一个实施例，调制信号是具有第一状态和第二状态的通断键控(OOK)调制信号，并且当调制信号处于第一状态时，功率开关处于断开状态。
根据另一个实施例，开关模式电源包括耦合到功率开关的电感器和耦合到电感器并通过调制信号控制的整流器开关。
当功率开关由于调制信号而处于断开状态时，电感器的电流几乎为零。这不仅有利于在负载暂态时减小过冲或下冲，而且有利于降低开关模式电源的功耗。
这样的整流器开关的使用有利于提高开关模式电源的效率。
当调制信号处于第一状态时，例如整流器开关处于关断状态。
作为一个非限制的示例，第一状态可以是关断状态。
例如，开关模式电源可以是DC-DC转换器。
根据另一个实施例，读写器是近场通信读写器。
根据另一方面，提出了电子设备，比如移动蜂窝电话，该电子设备包括如上定义的读写器。
根据另一方面，提出了属于如上定义的读写器的开关模式电源，该开关模式电源具有被配置为接收调制信号的控制输入。
附图说明
在检查完全无限制的实施方式和实施例以及附图的详细描述之后，本发明的其他优点和特征将变得明显，其中：
图1到图4示意性地示出了本发明的实施例。
具体实施方式
图1的参考标记1指示电子设备，例如智能移动蜂窝电话，即本领域的技术人员通常所知的智能手机，该智能手机包括射频通信读写器2，例如近场通信读写器，即本领域的技术人员通常所知的缩写NFC读写器，该NFC读写器被配置为与其他进场通信设备建立通信，例如NFC标签。
NFC读写器2包括电源(例如直流DC电源3)，开关模式电源(例如耦合到电源3的DC-DC转换器4)，耦合到开关模式电源4的发射/接收级5，和被配置为将调制信号传送到开关模式电源4和发射/接收级5的信号发生器GM。
开关模式电源4被配置为将从电源3接收的输入电压Vin转换为要传送到发射/接收级5的输出电压Vout。
发射/接收级5由开关模式电源4的输出电压供电，并旨在从信号发生器GM接收调制信号MS。
例如，调制信号MS是通断键控调制的信号，即本领域的技术人员通常所知的缩写OOK，或者换言之，100％振幅移位键控调制的信号，即本领域的技术人员通常所知的缩写ASK。
我们现在参考图2以示出开关模式电源4的简化的实施例，参考图3以示出图2所示的实施例的对应的仿真结果。
示例中示出的开关模式电源4，例如升压型DC-DC转换器包括耦合到电源3的输入引脚6、在输入引脚6和中间节点8之间耦合的电感器7、在中间节点和地GND之间耦合的功率开关级9、在中间节点8和输出引脚11之间耦合的整流器开关级10、以及在输出引脚11和地GND之间耦合的输出电容器12。
功率开关级9包括阳极14耦合到地且阴极15耦合到中间节点8的第一二极管13，以及与第一二极管13并联耦合且具有耦合到功率开关控制模块17的功率控制输入PCI的功率开关16。
功率开关16包括N型MOSFET。
功率开关控制模块17包括第一输入IPS1，其旨在接收升压驱动信号BDS，该信号通常是脉宽调制信号，即本领域的技术人员通常所知的缩写PWM信号。功率开关控制模块17还包括旨在接收调制信号MS的第二输入IPS2，以及耦合到功率开关16的电源控制输入PCI的输出OPS。
例如，如果功率开关16是NMOS开关，那么功率开关控制模块17可以是简单地AND门。
如图3所示，调制信号MS具有“接通”状态和“关断”状态。例如，调制信号MS的频率可以在106kb/s到848kb/s的范围之间选择，并且可以应用调制的密勒编码。
当调制信号MS处于“关断”状态时，因为功率开关控制模块17的输出OPS也处于“关断”状态，所以功率开关处于其“断开”状态。
换言之，DC-DC转换器4具有处于“关断”状态的功率开关16，并且在调制信号MS处于“关断”状态期间，DC-DC转换器4的输出电压几乎稳定不变，而电感器7生成的电流IL迅速下降至几乎为零并且开关模式电源4的负载5不消耗电流。
在图3中我们可以看出，至少在调制信号MS处于“关断”状态期间，DC-DC转换器4的电感器7的电流IL几乎为零，且DC-DC转换器4的输出电压几乎稳定不变。
此外，还有利地降低了DC-DC转换器4的功耗。
当调制信号MS处于“接通”状态时，功率开关控制模块17的输出等于升压驱动信号BDS。
整流器开关级10包括阳极20耦合到中间节点8且阴极21耦合到输出引脚11的第二二极管19，以及与第二二极管19并联耦合且具有耦合到整流器开关控制块23的整流器控制输入RCI的整流器开关22。
整流器开关22包括N型MOSFET。
整流器开关控制块23包括旨在接收整流器驱动器信号RDS的第一输入IRS1，该信号通常是PWM信号，旨在接收调制信号MS的第二输入IRS2，以及耦合到整流器开关22的整流器控制输入RCI的输出ORS。
例如，如果整流器开关是NMOS开关，那么整流器控制模块23可以是简单地AND门。
当调制信号MS处于“关断”状态时，因为整流器开关控制块23的输出OPS也处于“关断”状态，所以整流器开关22处于其“断开”状态。如上所述，当调制信号MS处于“关断”状态时，对应于升压DC-DC转换器的“关断”状态，此时功率开关16也处于“断开”状态。
当调制信号MS处于“接通”状态时，整流器开关控制块23的输出ORS等于整流器驱动器信号RDS。
以这种方式，整流器开关22直接由整流器驱动器信号RDS控制，因此增加了DC-DC转换器4的效率。
此外，如图3所示，因为当调制信号MS处于“关断”状态时，DC-DC转换器4的功率开关16和整流器开关22处于“关断”状态，所以在NFC系统2的负载暂态期间，在DC-DC转换器4的输出引脚11有若干输出电压Vout，
备选地，我们参考图4以说明开关模式电源4的另一个简化的实施例。
例如，示例中所示的开关模式电源4是降压DC-DC转换器，该DC-DC转换器包括耦合到电源3的输出引脚25、在输入引脚25和中间节点27之间耦合的功率开关级、阴极在中间节点27之间耦合且阳极与地GND耦合的第一二极管28、在中间节点27和输出引脚30之间耦合的电感器29、和在输出引脚30和地之间耦合的输出电容器31。
功率开关级26包括第二二极管35，该二极管阳极36耦合到中间节点27且阴极37耦合到输入引脚25。功率开关32由功率开关控制模块33控制，该功率开关控制模块包括旨在接收驱动器信号BDS(PWM信号)的第一输入IPS1。旨在接收调制信号MS的第二输入IPS2、和耦合到功率开关32的输出。
功率开关32可以包括N型MOSFET。
例如，如果功率开关32是NMOS开关，那么功率开关控制模块33可以是简单的AND门。
当调制信号MS处于“关断”状态时，由于功率开关控制模块33也处于“关断”状态，所以功率开关32处于“断开”状态。
至少在调制信号MS处于“关断”状态期间，处于“关断”状态的DC-DC转换器的电感器29的电流IL几乎为零，并且DC-DC转换器的输出电压Vout几乎保持稳定。有利的是，还减小了DC-DC转换器4的功耗。
当调制信号MS处于“接通”状态时，功率开关控制模块33的输出等于升压驱动器信号BDS。
此外，如图2中以相同的方式所示，由整流器开关控制块控制的整流器开关，还可以与第一二极管28并联耦合，使其形成增加降压DC-DC转换器效率的整流器开关级。
因此，无论公开什么实施例，开关模式电源4的功率调节艘适于NFC读写器2的负载变化，并且还减小了在负载暂态期间可能的过冲和下冲。

Claims (22)

1.一种适于与无线装置无线地交换信息的读写器，所述读写器包括：
信号发生器，被配置为生成调制信号；
发射/接收级，被配置为由所述调制信号驱动；和
开关模式电源，被配置为给所述发射/接收级供电，所述开关模式电源包括根据所述调制信号来被控制的功率开关。
2.根据权利要求1所述的读写器，其中所述调制信号是具有第一状态和第二状态的通断键控调制信号。
3.根据权利要求2所述的读写器，其中当所述调制信号处于所述第一状态时，所述功率开关处于断开状态。
4.根据权利要求2所述的读写器，其中所述第一状态是关断状态。
5.根据权利要求1所述的读写器，其中所述开关模式电源包括电感器和整流器开关，所述电感器耦合到所述功率开关，所述整流器开关耦合到所述电感器，并且根据所述调制信号来被控制。
6.根据权利要求5所述的读写器，其中所述调制信号是具有第一状态和第二状态的通断键控调制信号，并且其中当所述调制信号处于所述第一状态时，所述整流器开关处于关断状态。
7.根据权利要求6所述的读写器，其中所述第一状态是所述关断状态。
8.根据权利要求1所述的读写器，其中所述开关模式电源是DC-DC转换器。
9.根据权利要求1所述的读写器，其中所述读写器是近场通信读写器。
10.一种开关模式电源，包括：
输入节点，被配置为耦合到电源；
电感器，耦合在所述输入节点和中间节点之间；
功率开关级，耦合在所述中间节点和参考电压节点之间；
整流器开关级，耦合在所述中间节点和输出节点之间；
输出电容器，耦合在所述输出节点和所述参考电压节点之间；
功率开关控制电路，具有耦合到所述功率开关级的控制端子的输出，所述功率开关控制电路具有耦合以接收调制信号的第一输入、以及耦合以接收升压驱动器信号的第二输入。
11.根据权利要求10所述的开关模式电源，其中所述开关模式电源是升压DC-DC转换器。
12.根据权利要求10所述的开关模式电源，其中所述功率开关级包括N型MOSFET。
13.根据权利要求12所述的开关模式电源，其中所述功率开关控制电路包括AND门和所述AND门的输出，所述AND门具有耦合以接收所述调制信号的第一输入、以及耦合以接收所述升压驱动器信号的第二输入，所述AND门的输出被耦合到所述N型MOSFET的栅极。
14.根据权利要求10所述的开关模式电源，其中所述功率开关级包括：
第一二极管，具有耦合到所述参考电压节点的阳极、以及耦合到所述中间节点的阴极；和
功率开关，与所述第一二极管并联耦合，并且具有耦合到所述功率开关控制电路的所述输出的功率控制输入。
15.根据权利要求10所述的开关模式电源，其中所述升压驱动器信号是脉宽调制信号。
16.根据权利要求10所述的开关模式电源，其中所述整流器开关级包括：
第二二极管，具有耦合到所述中间节点的阳极、以及耦合到所述输出节点的阴极；和
整流器开关，与所述第二二极管并联耦合，并且具有耦合到整流器开关控制块的整流器控制输入。
17.根据权利要求16所述的开关模式电源，其中所述整流器开关控制块包括耦合以接收整流器驱动器信号的第一输入、耦合以接收所述调制信号的第二输入、和耦合到所述整流器开关的所述整流器控制输入的输出。
18.一种开关模式电源，包括：
输入节点，被配置为耦合到电源；
功率开关级，耦合在所述输入节点和中间节点之间；
第一二极管，具有耦合在所述中间节点之间的阴极、以及耦合到参考电压节点的阳极；
电感器，耦合在所述中间节点和输出节点之间；
输出电容器，耦合在所述输出节点和所述参考电压节点之间；
功率开关控制电路，具有耦合到所述功率开关级的控制端子的输出，所述功率开关控制电路具有耦合以接收调制信号的第一输入、以及耦合以接收升压驱动器信号的第二输入。
19.根据权利要求18所述的开关模式电源，其中所述功率开关级包括：
第二二极管，具有耦合到所述中间节点的阳极、以及耦合到所述输入节点的阴极；和
功率开关，与所述第二二极管并联耦合，并且具有耦合到所述功率开关控制电路的所述输出的输入。
20.根据权利要求19所述的开关模式电源，其中所述功率开关包括N型MOSFET，并且所述功率开关控制电路包含AND门。
21.根据权利要求18所述的开关模式电源，其中所述升压驱动器信号是脉宽调制信号。
22.根据权利要求18所述的开关模式电源，其中所述开关模式电源是降压DC-DC转换器。
CN201910950399.2A 2018-10-09 2019-10-08 Nfc型读写器的开关模式电源 Active CN111030449B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1859339A FR3087064B1 (fr) 2018-10-09 2018-10-09 Source d'alimentation a decoupage d'un lecteur du type communication en champ proche
FR1859339 2018-10-09

Publications (2)

Publication Number Publication Date
CN111030449A true CN111030449A (zh) 2020-04-17
CN111030449B CN111030449B (zh) 2023-05-19

Family

ID=65244198

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201910950399.2A Active CN111030449B (zh) 2018-10-09 2019-10-08 Nfc型读写器的开关模式电源
CN201921670211.0U Withdrawn - After Issue CN211859943U (zh) 2018-10-09 2019-10-08 读写器和开关模式电源

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201921670211.0U Withdrawn - After Issue CN211859943U (zh) 2018-10-09 2019-10-08 读写器和开关模式电源

Country Status (4)

Country Link
US (1) US20200112345A1 (zh)
EP (1) EP3637626B1 (zh)
CN (2) CN111030449B (zh)
FR (1) FR3087064B1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0610068D0 (en) * 2006-05-20 2006-06-28 Ford Global Tech Llc Receiving apparatus having a low quiescent current
CN102209129A (zh) * 2011-05-30 2011-10-05 惠州Tcl移动通信有限公司 一种手机
CN103023314A (zh) * 2012-12-28 2013-04-03 杭州士兰微电子股份有限公司 升降压开关电源及其控制器
CN105205513A (zh) * 2015-09-17 2015-12-30 威海北洋电气集团股份有限公司 一种基于自适应匹配技术的射频识别系统及方法
CN106022420A (zh) * 2016-07-26 2016-10-12 中国地质大学（武汉） 一种nfc读写电路

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148144A (en) * 1991-03-28 1992-09-15 Echelon Systems Corporation Data communication network providing power and message information
DE4215980A1 (de) * 1992-05-14 1993-11-18 Siemens Ag Aktives Freilaufelement
US6012736A (en) * 1994-04-26 2000-01-11 Eaton Corporation Vehicle steering column control system
US6005782A (en) * 1998-10-16 1999-12-21 Nortel Networks Corporation Flyback converter with soft switching using auxiliary switch and resonant circuit
JP4149915B2 (ja) * 2001-07-05 2008-09-17 ディーアイ／ディーティー， インコーポレーテッド 絶縁切替え調整器におけるインダクタ電流感知および関連する方法
DE10234893A1 (de) * 2002-07-26 2004-02-12 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Vorrichtung mit einem stationären und einem bewegbaren Bauteil und einer Einrichtung zur gleichzeitigen Übertragung von elektrischer Energie und Information zwischen diesen Bauteilen
US7173403B1 (en) * 2006-04-21 2007-02-06 Chunghwa Picture Tubes, Ltd. Boost DC/DC converter
CN102812627B (zh) * 2010-03-30 2016-02-03 瑞典爱立信有限公司 具有电压调节器的开关模式电源
CN102364859B (zh) * 2011-05-31 2014-11-26 杭州士兰微电子股份有限公司 开关电源控制装置及包含该控制装置的反激式开关电源
EP2717449B1 (en) * 2012-10-05 2016-12-14 Nxp B.V. Isolated switched-mode power supply
US9350232B2 (en) * 2013-03-14 2016-05-24 Apple Inc. Power supply with continuous spread-spectrum switching signal
DE102014102936A1 (de) * 2014-03-05 2015-09-10 Phoenix Contact Gmbh & Co. Kg Elektronische Baugruppe mit interner Nahfeldkommunikation
JP6440061B2 (ja) * 2014-07-15 2018-12-19 パナソニックＩｐマネジメント株式会社 点灯装置、照明装置及び車両用前照灯装置
CN107681900B (zh) * 2017-10-27 2020-05-22 中国航空无线电电子研究所 多模输出的电源/脉冲调制转换复用模块

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0610068D0 (en) * 2006-05-20 2006-06-28 Ford Global Tech Llc Receiving apparatus having a low quiescent current
CN102209129A (zh) * 2011-05-30 2011-10-05 惠州Tcl移动通信有限公司 一种手机
CN103023314A (zh) * 2012-12-28 2013-04-03 杭州士兰微电子股份有限公司 升降压开关电源及其控制器
CN105205513A (zh) * 2015-09-17 2015-12-30 威海北洋电气集团股份有限公司 一种基于自适应匹配技术的射频识别系统及方法
CN106022420A (zh) * 2016-07-26 2016-10-12 中国地质大学（武汉） 一种nfc读写电路

Also Published As

Publication number Publication date
EP3637626A1 (en) 2020-04-15
US20200112345A1 (en) 2020-04-09
EP3637626B1 (en) 2023-03-29
CN211859943U (zh) 2020-11-03
FR3087064B1 (fr) 2020-11-20
CN111030449B (zh) 2023-05-19
FR3087064A1 (fr) 2020-04-10

Similar Documents

Publication Publication Date Title
US9054548B2 (en) Contactless power feeding system
JP2018198535A (ja) 非接触給電システム
EP3544179B1 (en) Amplifier with base current reuse
CN102543993A (zh) 用于无线通信的半导体装置
CN108632794B (zh) 近场通信装置
US10218225B2 (en) Wireless power transfer gate-drive power reduction
CN104823204A (zh) 通信设备,通信方法,集成电路和电子仪器
Ruiz et al. A class E synchronous rectifier based on an E-pHEMT device for wireless powering applications
CN111756411A (zh) 无线通信装置
CN111742323A (zh) 通过射频识别rfid和rfid系统来无线地供应能量的方法
US9917579B2 (en) Low power consumption diode switch
CN205028302U (zh) 用于管理对象的操作的设备以及包括该设备的对象
CN211859943U (zh) 读写器和开关模式电源
CN210721478U (zh) 应答器
CN104899531A (zh) 一种应用于阅读器的二级电源管理电路及方法
CN113965513B (zh) 用于激活nfc设备的电路和方法
CN203366368U (zh) 受控nfc标签
Lai et al. DC-DC Converter and Rectifier with Resonator for Underwater Wireless Power Transfer Module
CN110620742B (zh) 用于限制标签接收的调制信号的电平的方法和对应限制器
CN114648081A (zh) 双系统rfid标签
CN110852121A (zh) 一种新型非接触式应答器接收电路

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address

Address after: Montrouge, France

Patentee after: STMicroelectronics France

Country or region after: France

Patentee after: STMicroelectronics Development Co.,Ltd.

Country or region after: Slovenia

Address before: France

Patentee before: STMicroelectronics S.A.

Country or region before: France

Patentee before: STMicroelectronics Development Co.,Ltd.

Country or region before: Slovenia