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公开(公告)号：US10461701B2
公开(公告)日：2019-10-29
申请号：US15875274
申请日：2018-01-19
Applicant: Silicon Laboratories Inc.
Inventor： Sherry X. Wu , Sriharsha Vasadi , Mustafa H. Koroglu , Rangakrishnan Srinivasan
Abstract: In one form, a signal generator system such as a power amplifier system includes an amplification stage, a lowpass filter, and a controller. The amplification stage includes a first amplifier having an input for receiving an input signal, a control input for receiving a first control signal, and an output. The lowpass filter has a first input coupled to the output of the first amplifier, and an output. The controller has a first input coupled to the output of the lowpass filter, and a first output coupled to the control input of the first amplifier, wherein the controller varies the first control signal to reduce a difference between the output of the lowpass filter and a first target voltage level.
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公开(公告)号：US20190229684A1
公开(公告)日：2019-07-25
申请号：US15875274
申请日：2018-01-19
Applicant: Silicon Laboratories Inc.
Inventor： Sherry X. Wu , Sriharsha Vasadi , Mustafa H. Koroglu , Rangakrishnan Srinivasan
Abstract: In one form, a signal generator system such as a power amplifier system includes an amplification stage, a lowpass filter, and a controller. The amplification stage includes a first amplifier having an input for receiving an input signal, a control input for receiving a first control signal, and an output. The lowpass filter has a first input coupled to the output of the first amplifier, and an output. The controller has a first input coupled to the output of the lowpass filter, and a first output coupled to the control input of the first amplifier, wherein the controller varies the first control signal to reduce a difference between the output of the lowpass filter and a first target voltage level.
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公开(公告)号：US10411583B2
公开(公告)日：2019-09-10
申请号：US15875583
申请日：2018-01-19
Applicant: Silicon Laboratories Inc.
Inventor： Sriharsha Vasadi , Mustafa H. Koroglu , Sherry X. Wu
Abstract: In one form, a power amplifier system includes first and second amplification path, and a combination element. The first amplification path has an input for receiving a drive signal, and an output. The second amplification path has an input coupled to the input of the first amplification path, and an output. The second amplification path has a delay element that inserts a signal path delay with respect to the first amplification path, wherein the delay element has a delay corresponding to a harmonic that is desired to be reduced. The combination element is coupled to the output of the first amplification path and an output of the second amplification path, and provides an output signal as a sum of outputs of the first amplification path and the second amplification path.
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公开(公告)号：US20190229608A1
公开(公告)日：2019-07-25
申请号：US15875583
申请日：2018-01-19
Applicant: Silicon Laboratories Inc.
Inventor： Sriharsha Vasadi , Mustafa H. Koroglu , Sherry X. Wu
CPC classification number: H02M1/126 , H02J3/01 , H02M2001/0003 , H03F3/21
Abstract: In one form, a power amplifier system includes first and second amplification path, and a combination element. The first amplification path has an input for receiving a drive signal, and an output. The second amplification path has an input coupled to the input of the first amplification path, and an output. The second amplification path has a delay element that inserts a signal path delay with respect to the first amplification path, wherein the delay element has a delay corresponding to a harmonic that is desired to be reduced. The combination element is coupled to the output of the first amplification path and an output of the second amplification path, and provides an output signal as a sum of outputs of the first amplification path and the second amplification path.
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