公开(公告)号：US10476451B2

公开(公告)日：2019-11-12

申请号：US15872740

申请日：2018-01-16

Applicant: MediaTek Inc.

Inventor： Xiaochuan Guo ,  Jenwei Ko ,  Wen-Chang Lee ,  Changhua Cao ,  Caiyi Wang

IPC: H03F3/217 ,  H03F3/191 ,  H03F3/45 ,  H03F3/24 ,  H03F1/56 ,  H03F1/02 ,  H03F3/195 ,  H03H7/01

Abstract: A class-F power amplifier (PA) with a matching network is disclosed herein. The class-F PA comprises a first switch and a second switch operating in differential mode, with a second harmonic trap circuitry selectively terminating the drain terminals to ground at a second harmonic frequency. The second harmonic trap circuitry comprises a plurality of lumped inductive and capacitive components. The PA further comprises a common mode trap and a matching network to reduce the imbalance of the drain terminal impedance between first harmonics and third harmonics.