公开(公告)号：US11424720B2

公开(公告)日：2022-08-23

申请号：US16827280

申请日：2020-03-23

Applicant: QUALCOMM Incorporated

Inventor： Pradeep Silva ,  Ramkumar Sivakumar ,  Qubo Zhou ,  Xinwang Zhang ,  Hanil Lee ,  Dongyang Tang ,  Vijayakumar Dhanasekaran

IPC: H03F1/02 ,  H03F3/21 ,  H04B1/40

Abstract: A power amplifier provides reduction of click and pop in audio applications. The power amplifier includes a first amplifier and an auxiliary amplifier. The auxiliary amplifier is used to ramp the power amplifier output from ground to an offset voltage to reduce the “click and pop” sound. The first amplifier and the auxiliary amplifier having a shared feedback loop. An output of the first amplifier and an output of the auxiliary amplifier may be switchably coupled to the shared feedback loop. A wave generator controls a switch to couple the first amplifier output or the auxiliary amplifier output to the shared feedback loop.

公开(公告)号：US20140232362A1

公开(公告)日：2014-08-21

申请号：US13773384

申请日：2013-02-21

Applicant: QUALCOMM INCORPORATED

Inventor： Hanil Lee ,  Vijayakumar Dhanasekaran

IPC: H02M3/155

CPC classification number: H02M3/155 ,  H02M2001/0019 ,  H02M2001/0029

Abstract: A method and apparatus for a dynamic programmable switcher driver using estimated current for device reliability is provided. The method adjusts a rate of closure of an electronic switch and begins when the load current of the Buck regulator is estimated. This estimated current flow is then compared with a predetermined threshold. If the estimated current flow is greater than the predetermined threshold then the rate of closure of the electronic switch is decreased. If the estimated current flow is less than the predetermined threshold then the rate of closure of the switch is increased. An apparatus for adjusting a rate of closure of an electronic switch is also provided. The apparatus includes: an adjustable p-driver having an internal register value; an adjustable n-driver having an internal register value; a positive switch connected to the adjustable p-driver; and a negative switch connected to the adjustable n-driver.

Abstract translation: 提供了一种使用估计电流进行器件可靠性的动态可编程切换器驱动器的方法和装置。 该方法调节电子开关的闭合速率，并在降压调节器的负载电流进行估计时开始。 然后将该估计电流与预定阈值进行比较。 如果估计的电流大于预定阈值，则电子开关的闭合速率降低。 如果估计的电流小于预定阈值，则开关的闭合速率增加。 还提供了一种用于调节电子开关闭合速率的装置。 该装置包括：具有内部寄存器值的可调节p驱动器; 具有内部寄存器值的可调n驱动器; 连接到可调式p驱动器的正极开关; 以及连接到可调节n驱动器的负极开关。