公开(公告)号：US20060041420A1

公开(公告)日：2006-02-23

申请号：US11173802

申请日：2005-06-30

申请人： James Martin ,  David Evans ,  Herman Vis

发明人： James Martin ,  David Evans ,  Herman Vis

IPC分类号： G06F9/455

CPC分类号： H04B5/00 ,  H04B5/0012 ,  H04B5/0031 ,  H04B5/0037 ,  H04B5/0056 ,  H04B5/0075 ,  H04L41/0806

摘要： To establish communication between a host and a client, electromagnetic field is generated across coils disposed in the devices. The magnetic field generated across the coil disposed in the host is used to power the client and to transfer data to the client. The data received by the client may, in turn, be used to configure the client. To receive data from the client, the coil disposed in the host is placed in a quiescent data recovery mode. The data to be transmitted from the client to the host generates variations in magnetic field formed across the client's coil. These variation, in turn, form variations in the magnetic field across the coil disposed in the host, and are subsequently decoded by the host to detect the data transmitted from the client. Supporting circuitry in both the host and client convert the electromagnetic variations into a stream of bits.

摘要翻译： 为了在主机和客户端之间建立通信，在设置在设备中的线圈之间产生电磁场。 设置在主机中的线圈上产生的磁场用于为客户端供电并将数据传送到客户端。 客户端接收的数据又可以用于配置客户端。 为了从客户端接收数据，设置在主机中的线圈被置于静态数据恢复模式。 要从客户端发送到主机的数据会产生跨客户线圈形成的磁场的变化。 这些变化反过来又形成了设置在主机中的线圈两端的磁场的变化，随后被主机解码以检测从客户端发送的数据。 主机和客户机中的支持电路将电磁变化转换为比特流。

公开(公告)号：US3995228A

公开(公告)日：1976-11-30

申请号：US616901

申请日：1975-09-26

申请人： Nelson S. Pass

发明人： Nelson S. Pass

IPC分类号： H03F3/18 ,  H03F3/20 ,  H03F3/30 ,  H03F3/183

CPC分类号： H03F3/3074

摘要： A transistor audio amplifier of the Class AB complementary symmetry type is biased with a new bias circuit to keep both transistors on during all normal signal conditions. The bias circuit includes a pair of series connected V.sub.BE Multipliers with an interconnection between the two multipliers receiving signal feedback from the amplifier output such that the Multipliers can bias both complementary transistors on for all normal signal operating conditions.

摘要翻译： AB类互补对称型晶体管音频放大器用新的偏置电路偏置，以在所有正常信号条件下保持两个晶体管导通。 偏置电路包括一对串联连接的VBE乘法器，两个乘法器之间的互连接收来自放大器输出的信号反馈，使得乘法器可以在所有正常信号操作条件下偏置互补晶体管。

公开(公告)号：US4899387A

公开(公告)日：1990-02-06

申请号：US279406

申请日：1988-12-02

申请人： Nelson S. Pass

发明人： Nelson S. Pass

IPC分类号： G10K11/178

CPC分类号： G10K11/1788 ,  G10K2210/12 ,  G10K2210/3011 ,  G10K2210/3013 ,  G10K2210/3217 ,  G10K2210/3227 ,  G10K2210/32271 ,  G10K2210/505

摘要： An electrically active sound wave attenuation apparatus mounted in an upright, free-standing housing for eliminating unwanted reflected waves in a room. The housing is intended to be placed in a location where undesired wave patterns, such as standing waves, are formed in order to offset or cancel such conditions. These conditions are offset by generating an acoustic signal which is the inverse of pressure waves at a particular location. The pressure waves are sensed by a module, including a microphone which generates a corresponding electrical signal. This signal is sent to an electrical circuit where an inverse signal is created which is then transmitted to a loudspeaker. The loudspeaker output is directed toward the location where the standing waves would be formed. The loudspeaker output nulls local acoustic waves so that no standing waves are formed. The housing may incorporate two acoustically isolated modules with resonance attenuating qualities, one at each end of the structure.

摘要翻译： 一种安装在直立的独立式外壳中的电活性声波衰减装置，用于消除房间中不需要的反射波。 外壳旨在放置在形成不期望的波形（例如驻波）以便抵消或取消这种条件的位置。 这些条件通过产生与特定位置处的压力波的相反的声信号来抵消。 压力波由模块感测，包括产生相应电信号的麦克风。 该信号被发送到产生反向信号的电路，然后发送到扬声器。 扬声器输出指向将形成驻波的位置。 扬声器输出使局部声波无效，从而不形成驻波。 外壳可以结合两个具有共振衰减特性的声隔离模块，一个在结构的两端。

公开(公告)号：US4752745A

公开(公告)日：1988-06-21

申请号：US86932

申请日：1987-08-18

申请人： Nelson S. Pass

发明人： Nelson S. Pass

IPC分类号： H03F3/08 ,  H03F3/30 ,  H03F3/26

CPC分类号： H03F3/3072 ,  H03F3/08

摘要： A high fidelity audio amplifier of the push-pull complementary symmetry type, featuring a feedback circuit with a bias sensing element connected to the output terminals of the output transistors. The feedback circuit includes a photoemitting element in optical communication with a photoconductive element which determines the relative voltage difference of the input terminals of the complementary symmetry output transistors.

摘要翻译： 具有推挽互补对称型的高保真音频放大器，其特征在于具有连接到输出晶体管的输出端的偏置感测元件的反馈电路。 反馈电路包括与光电导元件光通信的光发射元件，其确定互补对称输出晶体管的输入端子的相对电压差。

公开(公告)号：US4107619A

公开(公告)日：1978-08-15

申请号：US862406

申请日：1977-12-20

申请人： Nelson S. Pass

发明人： Nelson S. Pass

IPC分类号： H03F3/183 ,  H03F1/22 ,  H03F3/20 ,  H03F3/30 ,  H03F3/45

CPC分类号： H03F3/3072 ,  H03F1/22

摘要： A transistor amplifier in which collector to emitter voltages and currents are kept constant, particularly in the power output stages of the amplifying devices for minimizing distortion due to changes in the transistor beta, the essential form of distortion in amplifiers. High fidelity low power output current from a cascoded transistor amplifier is fed through a load to a second, high power, amplifier having constant current and less than unity gain, with an output summed with the output of the first amplifier such that the output of the first low power amplifier is the signal bearing portion and the output of the second amplifier serves as a current bootstrap, increasing the effective impedance of the load as seen by the first amplifier.

摘要翻译： 一种晶体管放大器，其中集电极到发射极的电压和电流保持恒定，特别是在放大器件的功率输出级中，用于最小化由于晶体管β的变化引起的失真，放大器的基本形式失真。 来自级联晶体管放大器的高保真低功率输出电流通过负载馈送到具有恒定电流且小于单位增益的第二高功率放大器，其输出与第一放大器的输出相加，使得输出 第一低功率放大器是信号承载部分，第二放大器的输出用作电流自举，增加第一放大器所看到的负载的有效阻抗。