公开(公告)号：US10326405B2

公开(公告)日：2019-06-18

申请号：US15598389

申请日：2017-05-18

Applicant: QUALCOMM INCORPORATED

Inventor： Sherif Galal ,  Subbarao Surendra Chakkirala ,  Khaled Abdelfattah ,  Earl Schreyer

IPC: H03F1/02 ,  H03F3/185 ,  H03F3/217 ,  H04R3/04 ,  H03F3/181

Abstract: An amplifier circuit includes an amplifier and a voltage boost circuit configured to provide a variable supply voltage to the amplifier, the variable supply voltage continuously proportional to an audio input signal, the variable supply voltage configured to follow an output of the amplifier.

公开(公告)号：US10110175B1

公开(公告)日：2018-10-23

申请号：US15599771

申请日：2017-05-19

Applicant: QUALCOMM Incorporated

Inventor： Khaled Abdelfattah ,  Sherif Galal

IPC: H03F3/45 ,  H03F1/32 ,  H03F3/08 ,  H03F3/213

Abstract: Various aspects of this disclosure describe reducing distortion of a power amplifier by coupling a common mode signal, such as determined from a voltage supply signal of the power amplifier or output of the power amplifier, to an input of the power amplifier. A resistive digital-to-analog converter (DAC) can be coupled to the power amplifier, and a common mode signal is modulated onto differential reference voltages of the DAC, causing the common mode signal to exist at both the input and output of the power amplifier at approximately the same time. Consequently, current flowing at differential inputs of the power amplifier due to the common mode component drops to zero, causing distortions due to common mode to differential mode conversion to be reduced.

公开(公告)号：US20170063306A1

公开(公告)日：2017-03-02

申请号：US14939894

申请日：2015-11-12

Applicant: QUALCOMM Incorporated

Inventor： Khaled Abdelfattah

IPC: H03F1/02 ,  H03F3/21 ,  H03F3/193

CPC classification number: H03F1/0205 ,  H03F3/189 ,  H03F3/193 ,  H03F3/211 ,  H03F3/45 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/21106 ,  H03G1/007 ,  H03G1/0088

Abstract: Exemplary embodiments of the present disclosure are related to reducing, and possibly preventing, gate inducted drain leakage for a switch. A device may comprise an amplifier and at least one transistor coupled in a feedback path of the amplifier. The device may also comprise a circuit configured to modulate a gate of the at least one transistor with a signal comprising a scaled-down and shifted version of a signal at a drain of the at least one transistor.

Abstract translation: 本公开的示例性实施例涉及减少和可能防止开关的栅极感应漏极泄漏。 器件可以包括放大器和耦合在放大器的反馈路径中的至少一个晶体管。 该器件还可以包括被配置为利用包括至少一个晶体管的漏极处的信号的缩小和偏移版本的信号来调制至少一个晶体管的栅极的电路。