Invention Grant
- Patent Title: Amplifier linearization in a radio frequency system
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Application No.: US16225912Application Date: 2018-12-19
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Publication No.: US10574192B2Publication Date: 2020-02-25
- Inventor: Yu Zhu , Boshi Jin , Steven Christopher Sprinkle , Florinel G. Balteanu , Oleksiy Klimashov , Dylan Charles Bartle , Paul T. DiCarlo
- Applicant: Skyworks Solutions, Inc.
- Applicant Address: US MA Woburn
- Assignee: Skyworks Solutions, Inc.
- Current Assignee: Skyworks Solutions, Inc.
- Current Assignee Address: US MA Woburn
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Main IPC: H03F1/32
- IPC: H03F1/32 ; H04B1/48 ; H03F3/24 ; H03F3/193 ; H03F3/19 ; H03F1/02 ; H03F3/195 ; H03F3/21 ; H03F3/45 ; H04B1/40 ; H04B1/3827 ; H04B1/525 ; H04W88/02

Abstract:
A linearization circuit that reduces intermodulation distortion in an amplifier output receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency. The linearization circuit generates an envelope signal based at least in part on a power level of the first signal and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal and the adjusted signal at a second terminal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation products that result from the intermodulation of the first frequency and the second frequency.
Public/Granted literature
- US20190190462A1 AMPLIFIER LINEARIZATION IN A RADIO FREQUENCY SYSTEM Public/Granted day:2019-06-20
Information query
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