公开(公告)号：AT487274T

公开(公告)日：2010-11-15

申请号：AT07004546

申请日：1999-09-22

Applicant: QUALCOMM INC

Inventor： KAUFMAN RALPH ,  HUNZEKER DARIN ,  CAMARILLO RICHARD

IPC: H03F3/24 ,  H03F3/72 ,  H03F1/02 ,  H03F1/14 ,  H03F3/60 ,  H03F3/68 ,  H03G1/00 ,  H04B1/04 ,  H04Q7/32

Abstract: A power amplifier arrangement comprises a power amplifier (32), an output circulator (55), a bypass path (30) and switches (20,43) for selecting either the power amplifier path or the bypass path. The arrangement comprises furthermore a resistor (45). If the power amplifier path is selected, the resistor (45) absorbs signals originating from the output (54), e.g. due to load mismatch. If the bypass path is selected, the power amplifier (32) provides a high output impedance to the circulator (55) in order to reflect the signal which is applied to the circulator through the bypass path. SAXD.