Xuejun Chen resumes & CV records
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Xuejun ChenWoodland Hills, CA
Xuejun Chen Phones & Addresses
Woodland Hills, CA
Moorpark, CA
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Us Patents
Multi-Mode High Efficiency Linear Power Amplifier
US Patent:
8049565, Nov 1, 2011
Filed:
Jan 6, 2011
Appl. No.:
12/985373
Inventors:
Guohao Zhang - Camarillo CA, US
Shiaw W. Chang - Thousand Oaks CA, US
Xuejun Chen - Moorpark CA, US
Jing Sun - Moorpark CA, US
Shiaw W. Chang - Thousand Oaks CA, US
Xuejun Chen - Moorpark CA, US
Jing Sun - Moorpark CA, US
Assignee:
Skyworks Solutions, Inc. - Woburn MA
International Classification:
H03F 3/68
US Classification:
330295
Abstract:
A power amplifier includes a plurality of amplification paths in which at least one amplification path is selectively enables and disabled, wherein each amplification path includes an output impedance modification element and a phase shift element that is operable independently from the output impedance modification element, and wherein the output impedance modification element in each amplification path provides selective impedance for each amplification path.
Multi-Mode High Efficiency Linear Power Amplifier
US Patent:
8421539, Apr 16, 2013
Filed:
Oct 31, 2011
Appl. No.:
13/285276
Inventors:
Guohao Zhang - Irvine CA, US
Shiaw W. Chang - Thousand Oaks CA, US
Xuejun Chen - Moorpark CA, US
Jing Sun - Moorpark CA, US
Shiaw W. Chang - Thousand Oaks CA, US
Xuejun Chen - Moorpark CA, US
Jing Sun - Moorpark CA, US
Assignee:
Skyworks Solutions, Inc. - Woburn MA
International Classification:
H03F 3/68
US Classification:
330295, 330124 R, 330 51
Abstract:
A power amplifier includes a plurality of amplification paths in which at least one amplification path is selectively enabled and disabled, wherein each amplification path includes an output impedance modification element and an output phase shift element that is operable independently from the output impedance modification element, and wherein the output impedance modification element in each amplification path provides selective impedance for each amplification path.
Multi-Mode Power Amplifier
US Patent:
8634789, Jan 21, 2014
Filed:
Nov 9, 2012
Appl. No.:
13/672981
Inventors:
Xuejun Chen - Moorpark CA, US
Guohao Zhang - Irvine CA, US
Jing Sun - Portland OR, US
Piyou Zhang - Aloha OR, US
Jinim Won - Santa Clarita CA, US
Guohao Zhang - Irvine CA, US
Jing Sun - Portland OR, US
Piyou Zhang - Aloha OR, US
Jinim Won - Santa Clarita CA, US
Assignee:
Skyworks Solutions, Inc. - Woburn MA
International Classification:
H04B 1/06
US Classification:
4552421, 455571, 330295
Abstract:
A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.
Multi-Mode High Efficiency Linear Power Amplifier
US Patent:
2009019, Aug 6, 2009
Filed:
Nov 18, 2008
Appl. No.:
12/273093
Inventors:
Guohao Zhang - Camarillo CA, US
Shiaw W. Chang - Thousand Oaks CA, US
Xuejun Chen - Moorpark CA, US
Jing Sun - Moorpark CA, US
Shiaw W. Chang - Thousand Oaks CA, US
Xuejun Chen - Moorpark CA, US
Jing Sun - Moorpark CA, US
International Classification:
H03F 3/68
US Classification:
330295
Abstract:
A power amplifier includes a plurality of amplification paths in which at least one amplification path is selectively enabled and disabled, wherein each amplification path includes an output impedance modification element and an output phase shift element that is operable independently from the output impedance modification element, and wherein the output impedance modification element in each amplification path provides selective impedance for each amplification path.
Multi-Mode Power Amplifier
US Patent:
2014009, Apr 3, 2014
Filed:
Dec 3, 2013
Appl. No.:
14/095118
Inventors:
- Woburn MA, US
Xuejun Chen - Thousand Oaks CA, US
Guohao Zhang - Nanjing, CN
Jing Sun - Portland OR, US
Piyou Zhang - Aloha OR, US
Jinim Won - Santa Clarita CA, US
Xuejun Chen - Thousand Oaks CA, US
Guohao Zhang - Nanjing, CN
Jing Sun - Portland OR, US
Piyou Zhang - Aloha OR, US
Jinim Won - Santa Clarita CA, US
Assignee:
Skyworks Solutions, Inc. - Woburn MA
International Classification:
H03F 3/21
H04W 52/02
H04W 52/02
US Classification:
455 73, 330295
Abstract:
A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.
Isbn (Books And Publications)
Two-Phase Flow And Heat Transfer: China-U.s. Progress
Author:
Xuejun Chen
ISBN #:
0891164324
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