-
公开(公告)号：US10700643B2
公开(公告)日：2020-06-30
申请号：US16138647
申请日：2018-09-21
Applicant: QUALCOMM Incorporated
Inventor： Chenliang Du
Abstract: This disclosure provides systems, methods and apparatuses for characterizing and operating a power amplifier. Before being placed into operation, output phase and output gain characteristics of the power amplifier may be determined over various operating conditions including varying two independent control signals and a supply voltage. The output phase and output gain characteristics may be stored for later retrieval. The power amplifier may be operated by determining a control signal profile for the two independent control signals based on operating conditions and radio-frequency (RF) envelope information associated with an input signal received by the power amplifier. The independent control signals may be generated in accordance with the control signal profile.
-
公开(公告)号：US11757423B2
公开(公告)日：2023-09-12
申请号：US17353420
申请日：2021-06-21
Applicant: QUALCOMM Incorporated
Inventor： Kai Liu , Chunhu Zhang , Chenliang Du
CPC classification number: H03H7/0161 , H03H9/02007 , H03H9/6406 , G10K11/36
Abstract: Disclosed is a radio frequency (RF) filter that vertically integrates an acoustic wave filter with an integrated passive device (IPD) filter. The acoustic wave filter provides selectivity at fundamental frequency band while the IPD filter provides rejection at harmonic frequency bands.
-
公开(公告)号：US11509269B2
公开(公告)日：2022-11-22
申请号：US16995468
申请日：2020-08-17
Applicant: QUALCOMM INCORPORATED
Inventor： Jisun Ryu , Yan Kit Gary Hau , Guoqing Fu , Xinwei Wang , Xiangdong Zhang , Chenliang Du
Abstract: An amplifier circuit includes an amplifier configured to receive a radio frequency (RF) input signal from an input node, a bias circuit comprising a reference transistor coupled between a reference current source and ground, and a bias transistor coupled to the reference transistor and configured to generate a main bias current to bias the amplifier, an input power sense circuit coupled to the input node, and an additional transistor coupled to the input power sense circuit and to the bias transistor, the additional transistor configured to generate an additional bias current to bias the amplifier, the additional bias current responsive to a power level of the RF input signal.
-
公开(公告)号：US20190097584A1
公开(公告)日：2019-03-28
申请号：US16138647
申请日：2018-09-21
Applicant: QUALCOMM Incorporated
Inventor： Chenliang Du
CPC classification number: H03F1/0222 , H03F3/191 , H03F3/193 , H03F3/2175 , H03F3/245 , H03F2200/102 , H03F2200/411 , H03F2200/451
Abstract: This disclosure provides systems, methods and apparatuses for characterizing and operating a power amplifier. Before being placed into operation, output phase and output gain characteristics of the power amplifier may be determined over various operating conditions including varying two independent control signals and a supply voltage. The output phase and output gain characteristics may be stored for later retrieval. The power amplifier may be operated by determining a control signal profile for the two independent control signals based on operating conditions and radio-frequency (RF) envelope information associated with an input signal received by the power amplifier. The independent control signals may be generated in accordance with the control signal profile.
-
-
-
Search Results
4
records
(took 0.01 seconds)
