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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
摘要： 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：US11817831B2
公开(公告)日：2023-11-14
申请号：US18114401
申请日：2023-02-27
发明人： Eric C. Wagner , Timothy R. LaRocca
CPC分类号： H03F3/195 , H03F1/56 , H03F3/72 , H03F2200/451
摘要： A radio frequency (RF) summer circuit having a characteristic impedance Z0 comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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公开(公告)号：US11616477B2
公开(公告)日：2023-03-28
申请号：US17126756
申请日：2020-12-18
发明人： Eric C. Wagner , Timothy R. LaRocca
摘要： A radio frequency (RF) summer circuit having a characteristic impedance Zo comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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公开(公告)号：US20190187733A1
公开(公告)日：2019-06-20
申请号：US15842193
申请日：2017-12-14
IPC分类号： G05F1/445 , H03K17/0812
CPC分类号： G05F1/445 , H03F1/42 , H03F3/193 , H03K17/04123 , H03K17/08122
摘要： A high-voltage, high-speed driver circuit that includes a source amplifier having an amplifying FET device with a drain terminal, a gate terminal and a source terminal, where the amplifying FET device receiving a control signal at its gate terminal and outputs an amplified control signal at its drain terminal. The driver circuit also includes an active load having a self-biasing load FET device with a drain terminal, a gate terminal and a source terminal, where the drain terminal of the load FET device is coupled to a power supply, the source terminal of the load FET device is coupled to the drain terminal of the amplifying FET device, and the source and gate terminals of the load FET device are electrically coupled together by a self-biasing line. The active load includes a load resistor provided within the self-biasing line that provides high impedance and low capacitance.
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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
IPC分类号： H03F1/26 , H03F3/195 , G10K11/178
摘要： 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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公开(公告)号：US09991874B1
公开(公告)日：2018-06-05
申请号：US15341829
申请日：2016-11-02
发明人： Timothy R. LaRocca , Denpol Kultran
CPC分类号： H03H15/02 , H03H2015/007
摘要： A tunable analog noise-cancelling transversal reconfigurable filter for filtering an RF signal. The filter includes a noise-cancelling balun responsive to the RF signal and providing gain and noise suppression, and a time delay network responsive to the signal from the balun. The time delay network includes a single continuous three-dimensional air coaxial line where a separate tap is provided between sections of the line. The filter also includes a multiplication and summing network having a plurality of multiplication stages, where each stage is fed by a voltage signal from at least one of the taps, and each stage includes a multiplication amplifier that amplifies the voltage signal. A tuning element provides a multiplication coefficient to the amplified signal. Each amplified signal in each stage is added on an output line, where the multiplication and summing network operates under Millman's Theorem.
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公开(公告)号：US20230216455A1
公开(公告)日：2023-07-06
申请号：US18114401
申请日：2023-02-27
发明人： Eric C. Wagner , Timothy R. LaRocca
CPC分类号： H03F3/195 , H03F3/72 , H03F1/56 , H03F2200/451
摘要： A radio frequency (RF) summer circuit having a characteristic impedance Z0 comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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公开(公告)号：US20220200547A1
公开(公告)日：2022-06-23
申请号：US17126756
申请日：2020-12-18
发明人： Eric C. Wagner , Timothy R. LaRocca
摘要： A radio frequency (RF) summer circuit having a characteristic impedance Zo comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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