公开(公告)号：US09634615B1

公开(公告)日：2017-04-25

申请号：US15064058

申请日：2016-03-08

Applicant: FREESCALE SEMICONDUCTOR, INC.

Inventor： Abdulrhman M. S. Ahmed ,  Ramanujam Srinidhi Embar ,  Yu-Ting D. Wu

IPC: H03F1/00 ,  H03F3/19 ,  H03F1/02 ,  H03F3/21 ,  H03F3/24

CPC classification number: H03F1/0288 ,  H03F3/19 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/111 ,  H03F2200/225 ,  H03F2200/451 ,  H03F2203/21103 ,  H03F2203/21139 ,  H03F2203/21142

Abstract: A Doherty amplifier device operable over multiple frequency bands includes a controller that, in some embodiments, is configured to output a carrier bias signal to a first amplifier and a peaking bias signal to a second amplifier as part of a first operating configuration associated with a first frequency band, and output the peaking bias signal to the second amplifier and the carrier bias signal to a third amplifier as part of a second operating configuration associated with a second frequency band. In some embodiments, the controller is configured to select an impedance inverter configuration associated with a respective frequency band. At least one impedance inverter configuration includes a compound impedance inverter including two or more impedance inverters coupled in series with at least one node between the two or more impedance inverters coupled to an output of a third amplifier.

公开(公告)号：US09621115B1

公开(公告)日：2017-04-11

申请号：US14966922

申请日：2015-12-11

Applicant: FREESCALE SEMICONDUCTOR INC.

Inventor： Yu-Ting D. Wu

IPC: H03F1/07 ,  H03F1/02 ,  H03F1/56 ,  H03F3/193 ,  H03F3/21

CPC classification number: H03F1/0288 ,  H01L2224/48137 ,  H01L2224/49111 ,  H03F1/565 ,  H03F3/193 ,  H03F3/211 ,  H03F2200/451 ,  H03F2203/21106 ,  H03F2203/21139

Abstract: The embodiments described herein include amplifiers that are typically used in radio frequency (RF) applications. The amplifiers described herein use a combiner that is implemented inside the device package. Specifically, the amplifiers can be implemented with a combiner that includes a transmission line inside the device package, where the transmission line has a length between first and second ends configured to provide an impedance inverter between the outputs (e.g., drain terminals) of transistors in the amplifier.