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1. 发明授权

US11237649B2 Inductive beacon for time-keying virtual reality applications 有权
公开(公告)号：US11237649B2
公开(公告)日：2022-02-01
申请号：US16026571
申请日：2018-07-03
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： Vladimir A. Muratov , Da-shan Shiu , William Plumb , Philip Frank Tustin
IPC分类号： G06F3/038 , G01S1/70 , G01D5/20 , H01F7/06 , G06F3/01
摘要： Circuits for controlling magnetic-based tracking systems are described. These systems may be used in virtual reality applications, for example to track in real-time the location of one or more body parts. The systems use a beacon emitting mutually orthogonal magnetic fields. On the receiver side, one or more sensors disposed on different parts of a body receive the magnetic fields. The beacon includes switching amplifiers for driving the magnetic field emitters. Being binary, these amplifiers may be controlled by binary signals. The circuits may exhibit a resonant frequency response, and may be operated off-resonance, thus providing for a better control of the magnetic fields amplitude. As a result, however, fluctuations in the envelop of the magnetic fields due to the presence of a beating tone may arise. These fluctuations may be shortened by gradually activating the drivers for the magnetic field emitters.

2. 发明申请

US20160254696A1 WIRELESS POWER TRANSFER IN-BAND COMMUNICATION SYSTEM 审中-公开
标题翻译：无线电力传输带内通信系统
公开(公告)号：US20160254696A1
公开(公告)日：2016-09-01
申请号：US15147919
申请日：2016-05-06
申请人： MediaTek Singapore Pte. Ltd.
发明人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin
IPC分类号： H02J7/02 , H04L1/00 , H04B5/00 , H02J50/10 , H02J50/60
CPC分类号： H02J50/12 , H02J7/025 , H02J50/10 , H02J50/60 , H02J50/80 , H04B5/0037 , H04B5/0093 , H04L1/0045 , H04L1/0061 , H04L25/4904 , H04W52/0261
摘要： A transmitter module is used in a wireless charging system, and is used for performing in-band communication with a receiver module in the wireless charging system to provide a message to the receiver module. The transmitter module has a matching network, a rectifier and an impedance component. The matching network has at least one input terminal coupled to a coil of the transmitter module and at least one output terminal. The rectifier is coupled to the output terminal of the matching network. The impedance component is selectively coupled to the output terminal of the matching network to vary a reflected impedance of the transmitter module seen by the receiver module. By varying the reflected impedance of the transmitter module seen by the receiver module, the transmitter module communicates with the receiver module to provide power control commands, status and/or foreign object detection information.
摘要翻译：在无线充电系统中使用发射机模块，用于与无线计费系统中的接收机模块进行带内通信，以向接收机模块提供消息。发射机模块具有匹配网络，整流器和阻抗组件。匹配网络具有耦合到发射器模块的线圈和至少一个输出端子的至少一个输入端子。整流器耦合到匹配网络的输出端。阻抗分量选择性地耦合到匹配网络的输出端，以改变由接收器模块看到的发射器模块的反射阻抗。通过改变由接收机模块看到的发射机模块的反射阻抗，发射机模块与接收机模块通信，以提供功率控制命令，状态和/或异物检测信息。

3. 发明申请

US20220066572A1 INDUCTIVE BEACON FOR TIME-KEYING VIRTUAL REALITY APPLICATIONS 有权
公开(公告)号：US20220066572A1
公开(公告)日：2022-03-03
申请号：US17473995
申请日：2021-09-13
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： Vladimir Alexander Muratov , Da-shan Shiu , William Plumb , Philip Frank Tustin
IPC分类号： G06F3/038 , G06F3/01 , G01S1/70 , G01D5/20 , H01F7/06
摘要： Circuits for controlling magnetic-based tracking systems are described. These systems may be used in virtual reality applications, for example to track in real-time the location of one or more body parts. The systems use a beacon emitting mutually orthogonal magnetic fields. On the receiver side, one or more sensors disposed on different parts of a body receive the magnetic fields. The beacon includes switching amplifiers for driving the magnetic field emitters. Being binary, these amplifiers may be controlled by binary signals. The circuits may exhibit a resonant frequency response, and may be operated off-resonance, thus providing for a better control of the magnetic fields amplitude. As a result, however, fluctuations in the envelop of the magnetic fields due to the presence of a beating tone may arise. These fluctuations may be shortened by gradually activating the drivers for the magnetic field emitters.

4. 发明授权

US09705566B2 Wireless charger communication automatic gain control 有权
公开(公告)号：US09705566B2
公开(公告)日：2017-07-11
申请号：US14505494
申请日：2014-10-02
申请人： MediaTek Singapore Pte. Ltd.
发明人： William Plumb , Anand Satyamoorthy , Patrick Stanley Riehl
IPC分类号： H04B5/00 , H02J7/02 , H02J5/00 , H04B1/04 , H02J50/80 , H02J50/10 , H02J50/40
CPC分类号： H04B5/0037 , H02J5/005 , H02J7/025 , H02J50/10 , H02J50/12 , H02J50/40 , H02J50/80 , H04B5/0031 , H04B2001/0416
摘要： A variable gain circuit used in an in-band communication system is provided that includes a current sense pickup that is coupled to the output of a DC power source that senses current from the DC power source and provides a first output signal. A variable controlled amplifier structure, that is coupled to the DC power source, receives the first output signal and provides a specified amount of gain to the first output signal so as to produce a second output signal. A digital signal is produced using the second output having a selected frequency bandwidth.

5. 发明授权

US09363041B2 Wireless power transfer in-band communication system 有权
标题翻译：无线功率传输带内通信系统
公开(公告)号：US09363041B2
公开(公告)日：2016-06-07
申请号：US14356607
申请日：2013-10-25
申请人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin , MediaTek Singapore Pte. Ltd.
发明人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin
IPC分类号： H04L27/10 , H04L1/00 , H04W52/02 , H04L25/49 , H02J7/02
CPC分类号： H02J50/12 , H02J7/025 , H02J50/10 , H02J50/60 , H02J50/80 , H04B5/0037 , H04B5/0093 , H04L1/0045 , H04L1/0061 , H04L25/4904 , H04W52/0261
摘要： A wireless charging in-band communication system includes a transmitter module that formats a message using CRC calculation and attaches the results of the CRC calculation to the message for message error detection. The transmitter includes channel encoding for message error correction. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepending the message with a synchronization sequence having Golay complementary codes. Moreover, the in-band communication includes a receiver module that receives the message from the transmitter module. The receiver module includes an impedance sensing circuit to detect changes in the reflected impedance of the transmitter module. The receiver module includes a front end filter used for pulse shaping and noise rejection. A preamble detection block includes a Golay complementary code correlator used for message detection, synchronization, and equalization coefficient estimation and selection. A decoding module performs biphase demodulation with error correction with a DC offset being estimated as the average value of the signal over the length of the message before channel decoding Also, the decoding module performs equalization, error correction channel decoding,and error detection (CRC).
摘要翻译：无线充电带内通信系统包括发射机模块，其使用CRC计算格式化消息，并将CRC计算的结果附加到用于消息错误检测的消息。发射机包括用于消息纠错的信道编码。调制模块对直流平衡信号进行双相调制，并进行阻抗切换，以改变源所见的反射阻抗。一个同步模块，前置消息具有一个具有Golay补码的同步序列。此外，带内通信包括从发射机模块接收消息的接收机模块。接收器模块包括用于检测发射器模块的反射阻抗的变化的阻抗感测电路。接收器模块包括用于脉冲整形和噪声抑制的前端滤波器。前导码检测块包括用于消息检测，同步和均衡系数估计和选择的Golay互补码相关器。解码模块执行纠错的双相解调，其中DC偏移被估计为在信道解码之前的消息的长度上的信号的平均值。另外，解码模块执行均衡，纠错信道解码和错误检测（CRC）。

6. 发明申请

US20140269886A1 WIRELESS POWER TRANSFER IN-BAND COMMUNICATION SYSTEM 审中-公开
标题翻译：无线电力传输带内通信系统
公开(公告)号：US20140269886A1
公开(公告)日：2014-09-18
申请号：US14215084
申请日：2014-03-17
申请人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Riehl , Anand Satyamoorthy , Philip Frank Tustin , MediaTek Singapore Pte. Ltd.
发明人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin
IPC分类号： H03M13/15 , H04L1/00 , H04L7/00 , H04L25/06 , H04L25/03
CPC分类号： H04L1/0042 , H03M5/12 , H03M5/145 , H03M13/152 , H03M13/19 , H04L1/0041 , H04L1/0045 , H04L1/0057 , H04L7/0058 , H04L7/0087 , H04L7/042 , H04L25/03834 , H04L25/061
摘要： A wireless charging in-band communication system includes a channel encoding for message error correction and detection. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepends the message with a synchronization sequence having Golay complementary codes. A receiver module receives the message from the transmitter module. A preamble detection block has a Golay complementary code correlator used for message detection, synchronization, and equalization coefficient estimation and selection. A decoding module that performs biphase demodulation with error correction with a DC offset being estimated as the average value of the signal over the length of the message before channel decoding. The decoding module performs equalization, error correction and detection channel decoding.
摘要翻译：无线充电带内通信系统包括用于消息纠错和检测的信道编码。调制模块对直流平衡信号进行双相调制，并进行阻抗切换，以改变源所见的反射阻抗。同步模块用具有Golay补码的同步序列来填充消息。接收机模块从发射机模块接收消息。前导码检测块具有用于消息检测，同步和均衡系数估计和选择的Golay互补码相关器。执行具有纠错的双相解调的解码模块，其中DC偏移被估计为在信道解码之前的消息长度上的信号的平均值。解码模块执行均衡，纠错和检测信道解码。

7. 发明申请

US20150093989A1 WIRELESS CHARGER COMMUNICATION AUTOMATIC GAIN CONTROL 有权
标题翻译：无线充电器通信自动增益控制
公开(公告)号：US20150093989A1
公开(公告)日：2015-04-02
申请号：US14505494
申请日：2014-10-02
申请人： MediaTek Singapore Pte. Ltd.
发明人： William Plumb , Anand Satyamoorthy , Patrick Stanley Riehl
IPC分类号： H04B5/00 , H04B1/04 , H04B1/16
CPC分类号： H04B5/0037 , H02J5/005 , H02J7/025 , H02J50/10 , H02J50/12 , H02J50/40 , H02J50/80 , H04B5/0031 , H04B2001/0416
摘要： A variable gain circuit used in an in-band communication system is provided that includes a current sense pickup that is coupled to the output of a DC power source that senses current from the DC power source and provides a first output signal. A variable controlled amplifier structure, that is coupled to the DC power source, receives the first output signal and provides a specified amount of gain to the first output signal so as to produce a second output signal. A digital signal is produced using the second output having a selected frequency bandwidth.
摘要翻译：提供了一种在带内通信系统中使用的可变增益电路，其包括耦合到直流电源的输出的电流感测拾取器，该直流电源感测来自直流电源的电流并提供第一输出信号。耦合到DC电源的可变控制放大器结构接收第一输出信号并且向第一输出信号提供指定量的增益以产生第二输出信号。使用具有所选频率带宽的第二输出产生数字信号。

8. 发明申请

US20150091523A1 WIRELESS CHARGER SYSTEM THAT HAS VARIABLE POWER / ADAPTIVE LOAD MODULATION 审中-公开
标题翻译：无线充电系统，具有可变功率/自适应负载调制
公开(公告)号：US20150091523A1
公开(公告)日：2015-04-02
申请号：US14503326
申请日：2014-09-30
申请人： MediaTek Singapore Pte. Ltd.
发明人： Anand Satyamoorthy , Patrick Stanley Riehl , William Plumb
IPC分类号： H02J7/02 , H02J7/00
CPC分类号： H02J50/10 , H02J7/025 , H04B5/0037 , H04B5/0093
摘要： A wireless charging system that includes in-band communication includes: a source device, including: at least a transmitter coil for providing a wireless charging power which is modulated according to a reflected impedance of at least a target device; and at least the target device, oriented on and magnetically coupled to the source device, for receiving the charging power. The target device includes: a receiver coil, loosely coupled to the transmitter coil, for receiving the charging power; a variable resistor loading the receiver coil; and a power detection and modulation circuit, for determining a size of the charging power, and providing a modulation control signal to the variable resistor according to the size of the charging power, for varying the resistance of the variable resistor in order to control an impedance of the target device which will be reflected at the source device.
摘要翻译：包括带内通信的无线充电系统包括：源设备，包括：至少一个发射器线圈，用于提供根据至少目标设备的反射阻抗被调制的无线充电功率; 以及至少目标设备，其定向和磁耦合到源设备，用于接收充电功率。目标装置包括：松耦合到发射器线圈的接收器线圈，用于接收充电功率; 负载接收线圈的可变电阻器; 以及功率检测和调制电路，用于确定充电功率的大小，以及根据充电功率的大小向可变电阻器提供调制控制信号，用于改变可变电阻器的电阻以控制阻抗将在源设备上反映的目标设备。

9. 发明申请

US20140314170A1 WIRELESS POWER TRANSFER IN-BAND COMMUNICATION SYSTEM 有权
标题翻译：无线电力传输带内通信系统
公开(公告)号：US20140314170A1
公开(公告)日：2014-10-23
申请号：US14356607
申请日：2013-10-25
申请人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin , MediaTek Singapore Pte, Ltd.
发明人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin
IPC分类号： H04L1/00 , H04L25/49
CPC分类号： H02J50/12 , H02J7/025 , H02J50/10 , H02J50/60 , H02J50/80 , H04B5/0037 , H04B5/0093 , H04L1/0045 , H04L1/0061 , H04L25/4904 , H04W52/0261
摘要： A wireless charging in-band communication system includes a transmitter module that formats a message using CRC calculation and attaches the results of the CRC calculation to the message for message error detection. The transmitter includes channel encoding for message error correction. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepending the message with a synchronization sequence having Golay complementary codes. Moreover, the in-band communication includes a receiver module that receives the message from the transmitter module. The receiver module includes an impedance sensing circuit to detect changes in the reflected impedance of the transmitter module. The receiver module includes a front end filter used for pulse shaping and noise rejection. A preamble detection block includes a Golay complementary code correlator used for message detection, synchronization, and equalization coefficient estimation and selection. A decoding module performs biphase demodulation with error correction with a DC offset being estimated as the average value of the signal over the length of the message before channel decoding Also, the decoding module performs equalization, error correction channel decoding,and error detection (CRC).
摘要翻译：无线充电带内通信系统包括发射机模块，其使用CRC计算格式化消息，并将CRC计算的结果附加到用于消息错误检测的消息。发射机包括消息纠错的信道编码。调制模块对直流平衡信号进行双相调制，并进行阻抗切换，以改变源所见的反射阻抗。一个同步模块，前置消息具有一个具有Golay补码的同步序列。此外，带内通信包括从发射机模块接收消息的接收机模块。接收器模块包括用于检测发射器模块的反射阻抗的变化的阻抗感测电路。接收器模块包括用于脉冲整形和噪声抑制的前端滤波器。前导码检测块包括用于消息检测，同步和均衡系数估计和选择的Golay互补码相关器。解码模块执行纠错的双相解调，其中DC偏移被估计为在信道解码之前的消息的长度上的信号的平均值。另外，解码模块执行均衡，纠错信道解码和错误检测（CRC）。

10. 发明授权

US10411831B2 Wireless power transfer in-band communication system 有权
公开(公告)号：US10411831B2
公开(公告)日：2019-09-10
申请号：US14215084
申请日：2014-03-17
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： William Plumb , Zhen Wang , Zoran Zvonar , Patrick Stanley Riehl , Anand Satyamoorthy , Philip Frank Tustin
IPC分类号： H04L1/00 , H04L25/06 , H04L25/03 , H04L7/00 , H03M5/12 , H03M5/14 , H03M13/15 , H03M13/19 , H04L7/04
摘要： A wireless charging in-band communication system includes a channel encoding for message error correction and detection. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepends the message with a synchronization sequence having Golay complementary codes. A receiver module receives the message from the transmitter module. A preamble detection block has a Golay complementary code correlator used for message detection, synchronization, and equalization coefficient estimation and selection. A decoding module that performs biphase demodulation with error correction with a DC offset being estimated as the average value of the signal over the length of the message before channel decoding. The decoding module performs equalization, error correction and detection channel decoding.

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