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1. (WO2017173119) MULTI-MODE STACKED AMPLIFIER

Pub. No.:    WO/2017/173119    International Application No.:    PCT/US2017/025091
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Fri Mar 31 01:59:59 CEST 2017
IPC: H03F 1/22
H03F 1/02
Applicants: SKYWORKS SOLUTIONS, INC.
Inventors: SOLIMAN, Yasser, Khairat
Title: MULTI-MODE STACKED AMPLIFIER
Abstract:
Aspects of this disclosure relate to an amplification circuit that includes a stacked amplifier and a bias circuit. The stacked amplifier includes at least a first transistor and a second transistor in series with each other. The stacked amplifier is operable in at least a first mode and a second mode. The bias circuit is configured to bias the second transistor to a linear region of operation in the first mode and to bias the second transistor as a switch in the second mode. In certain embodiments, the amplification circuit can be a power amplifier stage configured to receive a supply voltage that has a different voltage level in the first mode than in the second mode.