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公开(公告)号：US20200350870A1
公开(公告)日：2020-11-05
申请号：US16399599
申请日：2019-04-30
Applicant: Northrop Grumman Systems Corporation
Inventor： Manouchehr Ghanevati , Timothy R. LaRocca , John M. Trippett
IPC: H03F1/26 , H03F3/195 , G10K11/178
Abstract: An exemplary embodiment of a low noise amplifier has integral noise cancellation to provide a low noise figure and operation over a frequency range of 40 GHz-60 GHz. An amplifier amplifies an input signal as well as noise present with the amplified signal and amplified noise being out of phase and in phase, respectively, with the corresponding inputs. An auxiliary amplifier amplifies the same inputs and generates an amplified signal and amplified noise both being out of phase relative to the inputs. A summation circuit combines all of these amplified signals with the noise being cancelled since the auxiliary amplifier provides the same amount of amplification as the amplifier and the amplified noise signals being summed are 180 degrees out of phase to each other. Preferably, the amplifier, auxiliary amplifier and the summation device utilize CMOS transistors disposed on an SOI substrate with impedance stabilization over the frequency range.
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Patent Agency Ranking
公开(公告)号：US20230101673A1
公开(公告)日：2023-03-30
申请号：US17471535
申请日：2021-09-10
Applicant: Northrop Grumman Systems Corporation
Inventor： Manouchehr Ghanevati , Mansoor K. Siddiqui , David J. Miller , Michael Herndon
Abstract: An RF amplifier utilizes first and second main amplifiers in a balanced amplifier configuration with first and second auxiliary amplifiers connected in parallel across the first and second main amplifiers, respectively. The main and the auxiliary amplifiers are biased such that the third-order nonlinearity components in the combined output current are reduced. A common or independent bias control circuit(s) control(s) the DC operating bias of the auxiliary amplifiers and establishes DC operating points on curves representing third-order nonlinear components within the drain current having a positive slope (opposite to the corresponding slope of the main amplifiers). This results in reduction of overall third-order nonlinear components in combined currents at the output. In another embodiment, a phase shift of an input to one auxiliary amplifier is used to provide a peak in minimization at a frequency associated with the phase shift.
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公开(公告)号：US20250007468A1
公开(公告)日：2025-01-02
申请号：US18215439
申请日：2023-06-28
Applicant: Northrop Grumman Systems Corporation
Inventor： Manouchehr Ghanevati , Kevin M. Leong , Mansoor K. Siddiqui
Abstract: An exemplary RF amplifier circuit has a LNA with its output coupling RF signals to a load. A post distortion (PD) circuit having a semiconductor device with a control gate biased to cause the semiconductor device to operate in a nonlinear region at or near pinch-off that is coupled to the output of the LNA. The PD circuit generates at least one PD intermodulation product at the PD port in response to the RF signals being received from the LNA through the coupling. The at least one PD intermodulation product being out of phase to an intermodulation product produced by the LNA that is present at the output. The at least one PD intermodulation product combining with the intermodulation product produced by the LNA to cause a reduction of the intermodulation product at the load by at least several dB for at least one frequency in the range of frequencies.
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公开(公告)号：US10715088B1
公开(公告)日：2020-07-14
申请号：US16557521
申请日：2019-08-30
Applicant: Northrop Grumman Systems Corporation
Inventor： Manouchehr Ghanevati , Timothy R. LaRocca
Abstract: A low noise amplifier has integral noise cancellation to provide a low noise figure and operation over a frequency range of 0.5 GHz-50 GHz. An amplifier amplifies an input signal as well as noise present with the amplified signal and amplified noise being out of phase and in phase, respectively, with the corresponding inputs. A feedback circuit that is non-linear with frequency enables a constant amplification. A summation circuit combines amplified signals with the noise being cancelled since two combined noise signals being summed are 180 degrees out of phase to each other. An optional secondary amplification stage provides additional amplification. Preferably, the amplifier, auxiliary amplifier and the summation device utilize CMOS transistors disposed on an SOI substrate with impedance stabilization over the frequency range.
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公开(公告)号：US20240421776A1
公开(公告)日：2024-12-19
申请号：US18819096
申请日：2024-08-29
Applicant: Northrop Grumman Systems Corporation
Inventor： Manouchehr Ghanevati , Mansoor K. Siddiqui , David J. Miller , Michael Herndon
Abstract: An RF amplifier utilizes first and second main amplifiers in a balanced amplifier configuration with first and second auxiliary amplifiers connected in parallel across the first and second main amplifiers, respectively. The main and the auxiliary amplifiers are biased such that the third-order nonlinearity components in the combined output current are reduced. A common or independent bias control circuit(s) control(s) the DC operating bias of the auxiliary amplifiers and establishes DC operating points on curves representing third-order nonlinear components within the drain current having a positive slope (opposite to the corresponding slope of the main amplifiers). This results in reduction of overall third-order nonlinear components in combined currents at the output. In another embodiment, a phase shift of an input to one auxiliary amplifier is used to provide a peak in minimization at a frequency associated with the phase shift.
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公开(公告)号：US12088259B2
公开(公告)日：2024-09-10
申请号：US17471535
申请日：2021-09-10
Applicant: Northrop Grumman Systems Corporation
Inventor： Manouchehr Ghanevati , Mansoor K. Siddiqui , David J. Miller , Michael Herndon
CPC classification number: H03F1/32 , H03F1/0205 , H03F1/42 , H03F3/19 , H03F2200/36 , H03F2200/451
Abstract: An RF amplifier utilizes first and second main amplifiers in a balanced amplifier configuration with first and second auxiliary amplifiers connected in parallel across the first and second main amplifiers, respectively. The main and the auxiliary amplifiers are biased such that the third-order nonlinearity components in the combined output current are reduced. A common or independent bias control circuit(s) control(s) the DC operating bias of the auxiliary amplifiers and establishes DC operating points on curves representing third-order nonlinear components within the drain current having a positive slope (opposite to the corresponding slope of the main amplifiers). This results in reduction of overall third-order nonlinear components in combined currents at the output. In another embodiment, a phase shift of an input to one auxiliary amplifier is used to provide a peak in minimization at a frequency associated with the phase shift.
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