公开(公告)号：US07443977B1

公开(公告)日：2008-10-28

申请号：US11267652

申请日：2005-11-03

申请人： Rouben Toumani ,  Robert A. Blauschild ,  Sanjay M. Bhandari ,  Behrooz Rezvani ,  Dale Smith

发明人： Rouben Toumani ,  Robert A. Blauschild ,  Sanjay M. Bhandari ,  Behrooz Rezvani ,  Dale Smith

IPC分类号： H04M1/00

CPC分类号： H04L27/0002 ,  H04M3/007

摘要： A high efficiency line driver is disclosed. The line driver may be applied with equal advantage in wired and wireless communication media to amplify data signals with a minimum of power consumption. In an embodiment of the invention a line driver is disclosed which includes: at least one amplifier, a delay element, a control signal generator and a generator. The at least one amplifier includes at least one bias supply, a signal input and a signal output. The delay element accepts as an input the data signal and delays delivery of the data signal to the at least one line amplifier for amplification. The generator is responsive to a control signal to generate varying voltage levels corresponding thereto on the at least one bias supply of the at least one amplifier. The control signal generator is responsive to the input data signal to detect peaks therein and to generate the control signal corresponding thereto in advance of delivery of the data signal to the amplifier.

摘要翻译： 公开了一种高效线驱动器。 线驱动器可以在有线和无线通信介质中具有相同的优点，以最小的功耗来放大数据信号。 在本发明的实施例中，公开了一种线路驱动器，其包括：至少一个放大器，延迟元件，控制信号发生器和发生器。 所述至少一个放大器包括至少一个偏置电源，信号输入和信号输出。 延迟元件接收数据信号作为输入，并将数据信号的传送延迟至至少一个用于放大的线路放大器。 发生器响应于控制信号以在至少一个放大器的至少一个偏置电源上产生与其对应的变化的电压电平。 控制信号发生器响应于输入数据信号来检测其中的峰值，并且在将数据信号传送到放大器之前产生与之对应的控制信号。

公开(公告)号：US06987851B1

公开(公告)日：2006-01-17

申请号：US09962490

申请日：2001-09-24

申请人： Rouben Toumani ,  Robert A. Blauschild ,  Sanjay M. Bhandari ,  Behrooz Rezvani ,  Dale Smith

发明人： Rouben Toumani ,  Robert A. Blauschild ,  Sanjay M. Bhandari ,  Behrooz Rezvani ,  Dale Smith

IPC分类号： H04M3/40

CPC分类号： H04L27/0002 ,  H04M3/007

摘要： A high efficiency line driver is disclosed. The line driver may be applied with equal advantage in wired and wireless communication media to amplify data signals with a minimum of power consumption. In an embodiment of the invention a line driver is disclosed which includes: at least one amplifier, a delay element, a control signal generator and a generator. The at least one amplifier includes at least one bias supply, a signal input and a signal output. The delay element accepts as an input the data signal and delays delivery of the data signal to the at least one line amplifier for amplification. The generator is responsive to a control signal to generate varying voltage levels corresponding thereto on the at least one bias supply of the at least one amplifier. The control signal generator is responsive to the input data signal to detect peaks therein and to generate the control signal corresponding thereto in advance of delivery of the data signal to the amplifier.

摘要翻译： 公开了一种高效线驱动器。 线驱动器可以在有线和无线通信介质中具有相同的优点，以最小的功耗来放大数据信号。 在本发明的实施例中，公开了一种线路驱动器，其包括：至少一个放大器，延迟元件，控制信号发生器和发生器。 所述至少一个放大器包括至少一个偏置电源，信号输入和信号输出。 延迟元件接收数据信号作为输入，并将数据信号的传送延迟至至少一个用于放大的线路放大器。 发生器响应于控制信号以在至少一个放大器的至少一个偏置电源上产生与其对应的变化的电压电平。 控制信号发生器响应于输入数据信号来检测其中的峰值，并且在将数据信号传送到放大器之前产生与其对应的控制信号。

公开(公告)号：US20110085686A1

公开(公告)日：2011-04-14

申请号：US12900322

申请日：2010-10-07

申请人： Sanjay M. Bhandari ,  Paul D. Smith ,  Jiang (Jennifer) Yu ,  Sheng-Yu Peng ,  Priscilla E. Escobar-Bowser

发明人： Sanjay M. Bhandari ,  Paul D. Smith ,  Jiang (Jennifer) Yu ,  Sheng-Yu Peng ,  Priscilla E. Escobar-Bowser

IPC分类号： H04R25/00 ,  H04R3/00

CPC分类号： H04R29/006 ,  H04R3/005 ,  H04R25/407

摘要： A system includes a plurality of inputs each configured to receive a filtered version of a source signal. The system extracts the energy information from each input signal and compares the energy information of a plurality of input signals. Alternatively, the system extracts energy information from a signal that is the difference of two input signals. Based on the energy information, the system determines at least one parameter that may be changed in at least one circuit in a plurality of circuits to minimize the differences in energy of the input signals or to minimize the energy of the difference signal. Parameters may include for example amplification, delay, and corner frequency values.The set of circuits may include microphone interface circuits. Merely by way of example, a system with microphone interface circuits may be included in a hearing enhancement device or in a hands-free earpiece.

摘要翻译： 系统包括多个输入，每个输入被配置为接收源信号的滤波版本。 该系统从每个输入信号中提取能量信息，并比较多个输入信号的能量信息。 或者，系统从作为两个输入信号的差的信号提取能量信息。 基于能量信息，系统确定可以在多个电路中的至少一个电路中改变的至少一个参数，以最小化输入信号的能量差异或最小化差分信号的能量。 参数可以包括例如放大，延迟和转角频率值。 该组电路可以包括麦克风接口电路。 仅举例来说，具有麦克风接口电路的系统可以包括在听力增强装置中或免提耳机中。

公开(公告)号：US06924701B1

公开(公告)日：2005-08-02

申请号：US10453571

申请日：2003-06-03

申请人： Sanjay M. Bhandari

发明人： Sanjay M. Bhandari

IPC分类号： H03F1/14 ,  H03F3/45

CPC分类号： H03F1/14 ,  H03F3/45291

摘要： A method and apparatus for compensating an amplifier is disclosed which significantly improves the unity gain bandwidth of the amplifier. In an embodiment of the invention the amplifier includes at least one compensated pair of cascode coupled transistors including: an input transistor, a cascode transistor, and a bypass element. The input transistor exhibits a first transition frequency. The cascode transistor is cascode coupled to the input transistor. The cascode transistor exhibits a second transition frequency less than or equal to the first transition frequency of the input transistor. The bypass element couples across a corresponding current interface of the cascode transistor to substantially bypass the cascode transistor at a pole frequency thereof.

摘要翻译： 公开了用于补偿放大器的方法和装置，其显着地改善了放大器的单位增益带宽。 在本发明的一个实施例中，放大器包括至少一对补偿的共源共栅耦合晶体管对，包括：输入晶体管，共源共栅晶体管和旁路元件。 输入晶体管呈现第一跃迁频率。 共源共栅晶体管被共源共栅耦合到输入晶体管。 共源共栅晶体管呈现小于或等于输入晶体管的第一跃迁频率的第二转变频率。 旁路元件跨过共源共栅晶体管的相应电流接口耦合，以在其极点频率基本旁路共源共栅晶体管。

公开(公告)号：US06404578B1

公开(公告)日：2002-06-11

申请号：US09407776

申请日：1999-09-28

申请人： Sanjay M. Bhandari ,  David Allouche

发明人： Sanjay M. Bhandari ,  David Allouche

IPC分类号： G11B1512

CPC分类号： H03F3/45179 ,  G11B20/10009 ,  G11B2005/001 ,  H03F3/45098 ,  H03F3/45941 ,  H03F2203/45466 ,  H03F2203/45506 ,  H03F2203/45631 ,  H03F2203/45634 ,  H03F2203/45646 ,  H03F2203/45702 ,  H03F2203/45726 ,  H03H11/1291

摘要： A preamplifier integrated circuit for a magnetic storage device includes read channel and a write channel. The read channel includes a filter in a forward signal path which has a low corner frequency (LCF) which varies in a time dependent manner related to the duration of a write-to-read disturbance induced by a transition from a write mode to a read mode. The LCF of the filter moves from a relatively high initial frequency to a lower steady state frequency to effectively reduce the settling time of the write-to-read disturbance without causing read errors which may arise from overfiltering in the steady state. Favorably, the filter in the forward signal path is formed by a unity gain differential emitter-follower in the forward path and a low pass filter (LPF) in a feedback path around the differential emitter-follower, the pole of the LPF being moved to achieved the movement of the LCF in the forward path. In the steady-state read mode, the filter arrangement also significant reduces DC offset in the read channel.

摘要翻译： 用于磁存储装置的前置放大器集成电路包括读通道和写通道。 读通道包括前向信号路径中的滤波器，该滤波器具有低转角频率（LCF），其以与由写入模式向读取的转换引起的写入读取干扰的持续时间有关的时间依赖性方式变化 模式。 滤波器的LCF从相对高的初始频率移动到较低的稳态频率，以有效地减小写入读取干扰的建立时间，而不会导致在稳态过滤中可能产生的读取错误。 有利的是，前向信号路径中的滤波器由正向路径中的单位增益差分射极跟随器和差分射极跟随器周围的反馈路径中的低通滤波器（LPF）形成，LPF的极点被移动到 实现了LCF在前进道路中的移动。 在稳态读取模式下，滤波器布置也显着降低了读通道中的直流偏移。

公开(公告)号：US08515093B2

公开(公告)日：2013-08-20

申请号：US12900322

申请日：2010-10-07

申请人： Sanjay M. Bhandari ,  Paul D. Smith ,  Jiang (Jennifer) Yu ,  Sheng-Yu Peng ,  Priscilla E. Escobar-Bowser

发明人： Sanjay M. Bhandari ,  Paul D. Smith ,  Jiang (Jennifer) Yu ,  Sheng-Yu Peng ,  Priscilla E. Escobar-Bowser

IPC分类号： H04R3/00 ,  H03G5/00

CPC分类号： H04R29/006 ,  H04R3/005 ,  H04R25/407

摘要： A system includes a plurality of inputs each configured to receive a filtered version of a source signal. The system extracts the energy information from each input signal and compares the energy information of a plurality of input signals. Alternatively, the system extracts energy information from a signal that is the difference of two input signals. Based on the energy information, the system determines at least one parameter that may be changed in at least one circuit in a plurality of circuits to minimize the differences in energy of the input signals or to minimize the energy of the difference signal. Parameters may include for example amplification, delay, and corner frequency values.The set of circuits may include microphone interface circuits. Merely by way of example, a system with microphone interface circuits may be included in a hearing enhancement device or in a hands-free earpiece.

摘要翻译： 系统包括多个输入，每个输入被配置为接收源信号的滤波版本。 该系统从每个输入信号中提取能量信息，并比较多个输入信号的能量信息。 或者，系统从作为两个输入信号的差的信号提取能量信息。 基于能量信息，系统确定可以在多个电路中的至少一个电路中改变的至少一个参数，以最小化输入信号的能量差异或最小化差分信号的能量。 参数可以包括例如放大，延迟和转角频率值。 该组电路可以包括麦克风接口电路。 仅举例来说，具有麦克风接口电路的系统可以包括在听力增强装置中或免提耳机中。

公开(公告)号：US20110222696A1

公开(公告)日：2011-09-15

申请号：US13046451

申请日：2011-03-11

申请人： Nikhil Balachandran ,  Sanjay M. Bhandari ,  Srivatsan Kandadai ,  Horia Giuroiu ,  Jeffery D. Dugger

发明人： Nikhil Balachandran ,  Sanjay M. Bhandari ,  Srivatsan Kandadai ,  Horia Giuroiu ,  Jeffery D. Dugger

IPC分类号： H04R29/00

CPC分类号： H04R29/001

摘要： A test signal generator provides a test signal to an acoustic device under test and a data acquisition device acquires data from the acoustic device. The initial frequency response of the signal path through the acoustic device is determined based on the test signal and the acquired data. A target frequency response is selected. A desired configuration of a configurable circuit in the signal path is determined modifying the signal path such that the frequency response of the signal path is substantially similar to the target frequency response. At least one parameter for at least one programmable component of the configurable circuit is determined and programmed into the programmable component.

摘要翻译： 测试信号发生器向测试中的声学设备提供测试信号，并且数据采集设备从声学设备获取数据。 通过声学装置的信号路径的初始频率响应基于测试信号和所获取的数据确定。 选择目标频率响应。 确定信号路径中的可配置电路的期望配置修改信号路径，使得信号路径的频率响应基本上类似于目标频率响应。 确定可配置电路的至少一个可编程组件的至少一个参数并将其编程到可编程组件中。

公开(公告)号：US06424480B1

公开(公告)日：2002-07-23

申请号：US09407775

申请日：1999-09-28

申请人： Sanjay M. Bhandari ,  David Allouche ,  Dennis Pu

发明人： Sanjay M. Bhandari ,  David Allouche ,  Dennis Pu

IPC分类号： G11B502

CPC分类号： G11B20/10009 ,  G11B5/012 ,  G11B5/035 ,  G11B2005/001

摘要： A magnetic storage apparatus includes first and second control devices to effectively reduce a disturbance which occurs in a read channel of the apparatus upon transition from a write mode to a read mode. The first control device is in a first gain stage coupled to a read sensor. The second control device is a back-end circuit and, in addition to reducing the duration of the write-to-read disturbance, is effective to significantly reduce offset of the apparatus. A user interface in the form of a serial interface allows user programmability of both of the first and second control devices. The serial interface and the read channel with the first and second control devices are embodied in a pre-amplifier integrated circuit. The programmability affords flexibility to the IC manufacturer as well as to the manufacturer of the magnetic storage device in optimizing the read channel to account for model-to-model and unit-to-unit variations in the write-to-read disturbance.

摘要翻译： 磁存储装置包括第一和第二控制装置，用于有效地减少在从写入模式转换到读取模式时在装置的读取通道中发生的干扰。 第一控制装置处于耦合到读取传感器的第一增益级。 第二控制装置是后端电路，并且除了减小写入读取干扰的持续时间之外，有效地显着减少装置的偏移。 以串行接口形式的用户接口允许用户可编程的第一和第二控制设备。 具有第一和第二控制装置的串行接口和读取通道被实现在前置放大器集成电路中。 可编程性为IC制造商以及磁存储设备的制造商提供了灵活性，以优化读取通道，以解决写入到读取的干扰中的模型到模型和单位到单位的变化。