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公开(公告)号:US20050243010A1
公开(公告)日:2005-11-03
申请号:US11165142
申请日:2005-06-23
申请人: John Terry
发明人: John Terry
CPC分类号: G06K19/0723 , G06K19/07749 , H04B5/0012 , H04B5/0081 , H04B5/02
摘要: Devices and methods are provided to enhance magnetic field communication. One aspect of the present subject matter relates to a method for transmitting and receiving signals using an antenna element electrically connected to a driver and an amplifier. According to various embodiments of the method, a first signal is transmitted from the antenna element and a second signal that was induced in the antenna element is received. Transmitting the first signal includes driving the first signal through the antenna element using the driver, and monitoring the first signal through an input impedance of the amplifier. Receiving the second signal includes reducing the input impedance of the amplifier, and receiving the second signal at the amplifier through the reduced input impedance. Various embodiments shield the antenna element from electric and electromagnetic fields. Other aspects are provided herein.
摘要翻译: 提供了设备和方法来增强磁场通信。 本主题的一个方面涉及使用电连接到驱动器和放大器的天线元件来发送和接收信号的方法。 根据该方法的各种实施例,从天线元件发送第一信号,并且接收在天线元件中感应的第二信号。 传输第一信号包括使用驱动器驱动通过天线元件的第一信号,以及通过放大器的输入阻抗监视第一信号。 接收第二信号包括减小放大器的输入阻抗,以及通过减小的输入阻抗在放大器处接收第二信号。 各种实施例屏蔽天线元件免受电场和电磁场的影响。 本文提供了其他方面。
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公开(公告)号:US20050124312A1
公开(公告)日:2005-06-09
申请号:US10727263
申请日:2003-12-03
申请人: John Terry
发明人: John Terry
CPC分类号: H03D1/18
摘要: An AM demodulator using totem pole complementary metal oxide semiconductor transistors having a feedback to provide a common gate voltage of approximately half that across the transistors in the totem pole. The AM demodulator used in a hearing assistance device and in a programmer of a hearing assistance device.
摘要翻译: 一种使用图腾柱互补金属氧化物半导体晶体管的AM解调器,其具有反馈以提供跨越图腾柱中的晶体管的大约一半的公共栅极电压。 用于听力辅助装置和助听装置的编程器中的AM解调器。
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公开(公告)号:US06614861B1
公开(公告)日:2003-09-02
申请号:US09474497
申请日:1999-12-29
申请人: John Terry , Steven D. Gray
发明人: John Terry , Steven D. Gray
IPC分类号: H04B710
CPC分类号: H04L27/3416 , H04B7/0669 , H04L1/0618 , H04L27/2627
摘要: An M-ary signal constellation within an N-dimensional space is defined, preferably such that each of the M symbols reside upon the surface of an N-dimensional sphere and such that a minimum distance between symbols is maximized. N orthogonal functions are used as the bases for representing the N-dimensional symbols for transmission. Orthogonal functions exhibiting orthogonality in frequency, time and/or space are also described for this purpose. Furthermore, conventional QAM symbol encoding may be used to represent the N-dimensional symbols, thereby facilitating the use of conventional modulation techniques. In this manner, higher dimensional modulation schemes may be realized.
摘要翻译: 定义N维空间内的M元信号星座,优选地使得M个符号中的每一个驻留在N维球体的表面上,并且使得符号之间的最小距离最大化。 N个正交函数用作表示用于传输的N维符号的基础。 为此也描述了在频率,时间和/或空间中呈现正交性的正交函数。 此外,常规QAM符号编码可以用于表示N维符号,从而有助于使用常规调制技术。 以这种方式,可以实现更高维度的调制方案。
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34.
公开(公告)号:US4811778A
公开(公告)日:1989-03-14
申请号:US177138
申请日:1988-04-04
申请人: David J. Allen , Joseph Martin , Peter E. Rose , John Terry
发明人: David J. Allen , Joseph Martin , Peter E. Rose , John Terry
CPC分类号: B22C9/04 , B22C21/14 , Y10T29/49336 , Y10T29/49812 , Y10T29/49988
摘要: The pins which are used for the support of a core in a lost wax casing process are provided with caps. The caps provide sufficient surface area for encapsulation by ceramic slurry. Heat loss from the metal melt via the pins is thus obviated along with undesirable grain nucleation.
摘要翻译: 用于在失蜡包装工艺中支撑芯的销设置有盖。 盖子提供足够的表面积用于陶瓷浆料的包封。 因此,通过引脚从金属熔体的热损失与不期望的晶粒成核一起被消除。
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