公开(公告)号：US20070116303A1

公开(公告)日：2007-05-24

申请号：US11286845

申请日：2005-11-22

Applicant: Ajaykumar Kanji

Inventor： Ajaykumar Kanji

IPC: H03F21/00 ,  H03G3/10

CPC classification number: H03F1/305 ,  H03F2200/03 ,  H03F2200/414 ,  H03F2200/507 ,  H03F2200/78

Abstract: An audio output driver includes an audio amplifier for generating an amplified signal. A virtual ground generator generates a virtual ground signal in response to a virtual ground reference. A combiner produces an output signal, based on the amplified signal and the virtual ground signal, that is coupled to an audio output device. A voltage equalizer equalizes the virtual ground reference and the output signal when the supply voltage compares unfavorably to a supply voltage threshold.

Abstract translation: 音频输出驱动器包括用于产生放大信号的音频放大器。 虚拟地面发生器响应于虚拟地面参考产生虚拟地面信号。 组合器基于放大的信号和虚拟接地信号产生耦合到音频输出设备的输出信号。 当电源电压与电源电压阈值不利地相比时，电压均衡器使虚拟接地基准和输出信号相等。

公开(公告)号：US08160272B1

公开(公告)日：2012-04-17

申请号：US12173564

申请日：2008-07-15

Applicant: Jeffrey Blackburn ,  Ajaykumar Kanji

Inventor： Jeffrey Blackburn ,  Ajaykumar Kanji

IPC: H04B15/00

CPC classification number: H03G3/348

Abstract: An audio output circuit includes a port attenuation circuit, which is configured to convert an abrupt dc voltage offset transition between a pair of audio signals received in sequence at an input thereof into a more gradual transition. This conversion is achieved by performing, in sequence, a ramp-to-mute operation on a first of the pair of audio signals and a ramp-from-mute operation on a second of the pair of audio signals. The ramp-to-mute operation includes ramping an output of the audio output circuit from a dc voltage offset associated with the first of the pair of audio signals to a reference dc voltage offset. The ramp-from-mute operation includes ramping the output of the audio output circuit from the reference dc voltage offset to a dc voltage offset associated with the second of the pair of audio signals. These ramping operations may be performed using voltage steps having uniform step size.

Abstract translation: 音频输出电路包括端口衰减电路，其被配置为将在其输入端依次接收的一对音频信号之间的突发直流电压偏移转换转换为更渐进的转变。 该转换通过依次执行该对音频信号中的第一个音频信号上的斜坡到静音操作和在一对音频信号中的第二个上的静音斜坡操作来实现。 斜坡到静音操作包括将音频输出电路的输出从与该对音频信号中的第一对相关联的直流电压偏移升压到参考直流电压偏移。 静音斜坡操作包括将音频输出电路的输出从参考直流电压偏移斜坡到与该对音频信号中的第二对相关联的直流电压偏移。 这些斜坡操作可以使用具有均匀步长的电压步骤来执行。

公开(公告)号：US20100013561A1

公开(公告)日：2010-01-21

申请号：US12173670

申请日：2008-07-15

Applicant: Ajaykumar Kanji ,  Jeffrey Blackburn

Inventor： Ajaykumar Kanji ,  Jeffrey Blackburn

IPC: H03F3/04

CPC classification number: H03F1/305 ,  H03F2200/03

Abstract: Anti-pop circuits are provided for an audio amplifier that uses a power supply voltage and a ground voltage to drive a load with an audio signal that is centered about a virtual analog ground. These anti-pop circuits include a variable resistor and a capacitor that are connected to the audio amplifier to provide a low pass filter. The variable resistor has resistance that varies in response to a voltage level of the virtual analog ground, such as a difference between a voltage level of the power supply voltage and the voltage level of the virtual analog ground. The variable resistor may be a field effect transistor having a gate that is responsive to the differences between the voltage level of the power supply voltage and the voltage level of the virtual analog ground. The capacitor may be a field effect transistor, as well. Related methods are also described.

Abstract translation: 为使用电源电压和接地电压的音频放大器提供防爆电路，以以虚拟模拟地为中心的音频信号驱动负载。 这些防爆电路包括连接到音频放大器以提供低通滤波器的可变电阻器和电容器。 可变电阻器具有响应于虚拟模拟地的电压电平而变化的电阻，例如电源电压的电压电平和虚拟模拟地的电压电平之间的差。 可变电阻器可以是具有响应于电源电压的电压电平和虚拟模拟地的电压电平之间的差的栅极的场效应晶体管。 电容器也可以是场效应晶体管。 还描述了相关方法。

公开(公告)号：US07817807B2

公开(公告)日：2010-10-19

申请号：US11286845

申请日：2005-11-22

Applicant: Ajaykumar Kanji

Inventor： Ajaykumar Kanji

IPC: H04B15/00

CPC classification number: H03F1/305 ,  H03F2200/03 ,  H03F2200/414 ,  H03F2200/507 ,  H03F2200/78

Abstract: An audio output driver includes an audio amplifier for generating an amplified signal. A virtual ground generator generates a virtual ground signal in response to a virtual ground reference. A combiner produces an output signal, based on the amplified signal and the virtual ground signal, that is coupled to an audio output device. A voltage equalizer equalizes the virtual ground reference and the output signal when the supply voltage compares unfavorably to a supply voltage threshold.

Abstract translation: 音频输出驱动器包括用于产生放大信号的音频放大器。 虚拟地面发生器响应于虚拟地面参考产生虚拟地面信号。 组合器基于放大的信号和虚拟接地信号产生耦合到音频输出设备的输出信号。 当电源电压与电源电压阈值不利地相比时，电压均衡器使虚拟接地基准和输出信号相等。

公开(公告)号：US07760016B2

公开(公告)日：2010-07-20

申请号：US12173670

申请日：2008-07-15

Applicant: Ajaykumar Kanji ,  Jeffrey Blackburn

Inventor： Ajaykumar Kanji ,  Jeffrey Blackburn

IPC: H03F1/14

CPC classification number: H03F1/305 ,  H03F2200/03

Abstract: Anti-pop circuits are provided for an audio amplifier that uses a power supply voltage and a ground voltage to drive a load with an audio signal that is centered about a virtual analog ground. These anti-pop circuits include a variable resistor and a capacitor that are connected to the audio amplifier to provide a low pass filter. The variable resistor has resistance that varies in response to a voltage level of the virtual analog ground, such as a difference between a voltage level of the power supply voltage and the voltage level of the virtual analog ground. The variable resistor may be a field effect transistor having a gate that is responsive to the differences between the voltage level of the power supply voltage and the voltage level of the virtual analog ground. The capacitor may be a field effect transistor, as well. Related methods are also described.

Abstract translation: 为使用电源电压和接地电压的音频放大器提供防爆电路，以以虚拟模拟地为中心的音频信号驱动负载。 这些防爆电路包括可变电阻器和连接到音频放大器以提供低通滤波器的电容器。 可变电阻器具有响应于虚拟模拟地的电压电平而变化的电阻，例如电源电压的电压电平和虚拟模拟地的电压电平之间的差。 可变电阻器可以是具有响应于电源电压的电压电平和虚拟模拟地的电压电平之间的差的栅极的场效应晶体管。 电容器也可以是场效应晶体管。 还描述了相关方法。

公开(公告)号：US20070133828A1

公开(公告)日：2007-06-14

申请号：US11304310

申请日：2005-12-14

Applicant: Ajaykumar Kanji

Inventor： Ajaykumar Kanji

IPC: H02B1/00

CPC classification number: G06F3/16 ,  H01R24/58 ,  H01R29/00 ,  H01R2103/00

Abstract: A plug-in detection module includes an impedance network for producing a plug-in signal in response to a supply signal that varies when one of a plurality of plug-in receptors is coupled to a plug connector and when one of the plurality of plug-in receptors is decoupled. A reference signal generator generates a reference signal having a plurality of reference signal values. A comparator generates a detection signal when the plug-in signal compares favorably to the reference signal. A processing module detects which of the plurality of plug-in receptors have a plug connector coupled thereto.

Abstract translation: 插件检测模块包括阻抗网络，用于响应于当多个插入式接头中的一个耦合到插头连接器而变化的供电信号产生插入式信号，并且当多个插入式接头中的一个插塞时， 受体被解耦。 参考信号发生器产生具有多个参考信号值的参考信号。 当插入信号与参考信号相比较时，比较器产生检测信号。 处理模块检测多个插入式接收器中的哪一个具有耦合到其上的插头连接器。

公开(公告)号：US20140218071A1

公开(公告)日：2014-08-07

申请号：US14342177

申请日：2012-06-29

Applicant: Scott Hanson ,  Kenneth Gozie Ifesinachukwu ,  Ajaykumar Kanji

Inventor： Scott Hanson ,  Kenneth Gozie Ifesinachukwu ,  Ajaykumar Kanji

IPC: G05F1/46 ,  H03K3/012

CPC classification number: G05F1/462 ,  G05F3/08 ,  G05F3/262 ,  G06F1/08 ,  G06F1/10 ,  H03K3/012 ,  H03K21/023 ,  H03K23/50

Abstract: An improved reference current generator for use in an integrated circuit. A voltage difference generator generates two voltages that are separated by a relatively small electrical potential. The two closely separated voltages are applied across a resistive element with relatively large impedance value resulting in a small and stable reference current. The stable reference current is mirrored and, if desired, amplified for use on the integrated circuit. A driver selectively drives state information off chip for assisting in post-silicon correction of unwanted sensitivities. A configuration memory stores values used to adjust effective device widths and lengths for correcting unwanted sensitivities.

Abstract translation: 一种用于集成电路的改进的参考电流发生器。 电压差发生器产生由相对小的电位分开的两个电压。 两个紧密分离的电压施加在具有较大阻抗值的电阻元件上，导致小且稳定的参考电流。 稳定的参考电流被镜像，并且如果需要，被放大以用于集成电路。 驱动器选择性地驱动芯片外的状态信息以辅助不期望的灵敏度的后硅校正。 配置存储器存储用于调整有效设备宽度和长度以修正不需要的灵敏度的值。

公开(公告)号：US07579832B1

公开(公告)日：2009-08-25

申请号：US12137836

申请日：2008-06-12

Applicant: Jeffrey Blackburn ,  Ajaykumar Kanji

Inventor： Jeffrey Blackburn ,  Ajaykumar Kanji

IPC: G01V3/00

CPC classification number: H04R3/00 ,  H04R29/001 ,  H04R29/004 ,  H04R2420/05 ,  H04R2420/09

Abstract: An audio system includes a CODEC audio jack having left and right audio ports and a jack sense circuit. The jack sense circuit includes left and right amplifiers and a cross-drive impedance sensing circuit. This cross-drive impedance sensing circuit, which is electrically coupled to the left and right audio ports and the left and right amplifiers, detects the resistances of left and right output loads in order to determine characteristics of a device connected to the CODEC audio jack. The cross-drive impedance circuit is configured to measure a resistance of a left output load electrically coupled to the left audio port, in response to a “right” test signal generated by the right amplifier, and is further configured to measure a resistance of a right output load electrically coupled to the right audio port in response to a “left” test signal generated by the left amplifier.

Abstract translation: 音频系统包括具有左右音频端口和插座感测电路的CODEC音频插孔。 插座感测电路包括左右放大器和交叉驱动阻抗感测电路。 电耦合到左和右音频端口以及左和右放大器的该交叉驱动阻抗感测电路检测左右输出负载的电阻，以便确定连接到CODEC音频插孔的设备的特性。 交叉驱动阻抗电路被配置为响应于由右放大器产生的“正确”测试信号来测量电耦合到左音频端口的左输出负载的电阻，并且还被配置为测量 响应于由左放大器产生的“左”测试信号，右输出负载电耦合到右音频端口。

公开(公告)号：US07916875B2

公开(公告)日：2011-03-29

申请号：US11304311

申请日：2005-12-14

Applicant: Ajaykumar Kanji

Inventor： Ajaykumar Kanji

IPC: H04R29/00

CPC classification number: H01R29/00 ,  H01R24/58 ,  H01R2103/00 ,  H01R2201/06

Abstract: A plug-in device detection module includes a measurement signal generator for generating a measurement signal. A port coupler couples the measurement signal to a selected plug-in receptor of a plurality of plug-in receptors, generates an input/output signal and generates a port signal in response to the measurement signal. A reference signal generator generates a reference signal based on the input/output signal, the reference signal having a plurality of reference signal values. A detection module detects a plug-in device type of a plug-in device coupled to the selected plug-in receptor, based on the reference signal and the port signal.

Abstract translation: 插入式设备检测模块包括用于产生测量信号的测量信号发生器。 端口耦合器将测量信号耦合到多个插入式接收器的选定插入式接收器，产生输入/输出信号并响应于测量信号产生端口信号。 参考信号发生器基于输入/输出信号生成参考信号，参考信号具有多个参考信号值。 检测模块基于参考信号和端口信号来检测耦合到所选择的插入式接收器的插件设备的插件设备类型。

公开(公告)号：US07809144B2

公开(公告)日：2010-10-05

申请号：US11304310

申请日：2005-12-14

Applicant: Ajaykumar Kanji

Inventor： Ajaykumar Kanji

IPC: H04R29/00

CPC classification number: G06F3/16 ,  H01R24/58 ,  H01R29/00 ,  H01R2103/00

Abstract: A plug-in detection module includes an impedance network for producing a plug-in signal in response to a supply signal that varies when one of a plurality of plug-in receptors is coupled to a plug connector and when one of the plurality of plug-in receptors is decoupled. A reference signal generator generates a reference signal having a plurality of reference signal values. A comparator generates a detection signal when the plug-in signal compares favorably to the reference signal. A processing module detects which of the plurality of plug-in receptors have a plug connector coupled thereto.

Abstract translation: 插件检测模块包括阻抗网络，用于响应于当多个插入式接头中的一个耦合到插头连接器而变化的供电信号产生插入式信号，并且当多个插入式接头中的一个插塞时， 受体被解耦。 参考信号发生器产生具有多个参考信号值的参考信号。 当插入信号与参考信号相比较时，比较器产生检测信号。 处理模块检测多个插入式接收器中的哪一个具有耦合到其上的插头连接器。