公开(公告)号：US07064607B2

公开(公告)日：2006-06-20

申请号：US10748986

申请日：2003-12-29

申请人： Kenneth George Maclean ,  Suribhotla Venkata Rajasekhar ,  David John Baldwin ,  Marco Corsi ,  Tobin Hagan

发明人： Kenneth George Maclean ,  Suribhotla Venkata Rajasekhar ,  David John Baldwin ,  Marco Corsi ,  Tobin Hagan

IPC分类号： H03G3/20

CPC分类号： H03F1/0261 ,  H03F1/3217 ,  H03F3/3022

摘要： A bias device that modifies the bias of a device based on an input signal to the device. The device may have a fixed bias, and the bias device can be connected in parallel with the fixed bias. The device can be an amplifier, such as a linear amplifier or a class AB amplifier. The bias device can be configured to provide maximum bias during the device's crossover time period.

摘要翻译： 一种偏置装置，其基于装置的输入信号修改装置的偏置。 该装置可以具有固定偏置，并且偏置装置可以与固定偏压并联连接。 该器件可以是放大器，例如线性放大器或AB类放大器。 偏置器件可以配置为在器件的交叉时间段期间提供最大偏置。

公开(公告)号：US07177418B2

公开(公告)日：2007-02-13

申请号：US10200459

申请日：2002-07-22

申请人： Kenneth George Maclean ,  Marco Corsi

发明人： Kenneth George Maclean ,  Marco Corsi

IPC分类号： H04M1/00 ,  H04M3/00

CPC分类号： H04M19/005

摘要： Systems and methods are provided for switching between power supply rail voltages for a differential driver device of a class G amplifier device. The amplifier device employs power MOSFETs to switch between supplying high supply voltages and low supply voltages to the power rails of the differential driver. The class G amplifier can be employed in driving an ADSL signal over a telephone line. A control device ramps the power supply rail voltage between low power supply states and high power supply states to mitigate noise and spikes that can be coupled to the output signal.

摘要翻译： 提供了用于在G类放大器装置的差分驱动器装置的电源轨电压之间切换的系统和方法。 放大器装置使用功率MOSFET来在差分驱动器的电源轨提供高电源电压和低电源电压之间切换。 G类放大器可以用于通过电话线驱动ADSL信号。 控制装置在低电源状态和高电源状态之间斜坡上的电源轨电压以减轻可耦合到输出信号的噪声和尖峰。

公开(公告)号：US06614310B2

公开(公告)日：2003-09-02

申请号：US10001330

申请日：2001-10-31

申请人： James Donald Quarfoot ,  Marco Corsi ,  Richard Knight Hester ,  Kenneth George Maclean

发明人： James Donald Quarfoot ,  Marco Corsi ,  Richard Knight Hester ,  Kenneth George Maclean

IPC分类号： H03G320

CPC分类号： H03F1/025

摘要： The present invention provides an apparatus and method for operating driver amplifier (20) of a line driver circuit (10) from a lower set of power supply voltages, and from a higher set of voltages only when the amplitude of the signal (12) being transmitted by the line driver (20) requires it as determined by a comparator (18). Advantageously, this reduces the power dissipation in the line driver (10) by operating the line amplifier (20) the majority of the time from the lower supply voltage. A delay circuit (14) delays the signal to be amplified sufficient to allow the transitioning of the power supply voltages provided to the amplifier hysteresis of this power supply voltage switching may also be used to further reduce power dissipation.

摘要翻译： 本发明提供了一种用于仅在信号（12）的振幅为（1）的情况下才从较低的一组电源电压和较高的一组电压来操作线路驱动器电路（10）的驱动放大器（20）的装置和方法 由线路驱动器（20）传输，由比较器（18）确定。 有利地，这通过在大部分时间从较低的电源电压操作线路放大器（20）来降低线路驱动器（10）中的功率消耗。 延迟电路（14）将要放大的信号足够延迟以允许提供给该电源电压切换的放大器滞后的电源电压的转换也可用于进一步降低功耗。