公开(公告)号：US20220263471A1

公开(公告)日：2022-08-18

申请号：US17597989

申请日：2019-08-22

Applicant: Khaled Mahmoud ABDELFATTAH ALY ,  Chaoli ZHONG ,  Dongyang TANG ,  Qualcomm Incorporated

Inventor： Khaled Mahmoud Abdelfattah Aly ,  Chaoli Zhong ,  Dongyang Tang

IPC: H03F1/02 ,  H03F3/45 ,  H04R3/00

Abstract: An apparatus is disclosed for reducing resistor conductivity modulation during amplification. In an example aspect, the apparatus includes a power amplifier circuit comprising a first pair of resistors, a digital-to-analog converter comprising a second pair of resistors, a reference generation circuit comprising a third pair of resistors, and a scaling circuit. The scaling circuit is configured to accept a common-mode reference voltage and a common-mode output voltage. The scaling circuit is also configured to provide a first voltage at body terminals of the first pair of resistors, a second voltage at body terminals of the second pair of resistors, and a third voltage at body terminals of the third pair of resistors such that a summation of the first voltage and the third voltage reduced by the second voltage is approximately equal to an average of the common-mode reference voltage and the common-mode output voltage.