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公开(公告)号：US11239803B2
公开(公告)日：2022-02-01
申请号：US16743638
申请日：2020-01-15
Applicant: pSemi Corporation
Inventor： Parvez Daruwalla , David Kovac
Abstract: Various methods and circuital arrangements for protection of an RF amplifier are presented. According to one aspect, the RF amplifier is part of switchable RF paths that may include at least one path with one or more attenuators or switches that can be used during normal operation to define different modes of operation of the at least one path. An RF level detector monitors a level of an RF signal during operation of any one of the switchable RF paths and may control the attenuators or switches to provide an attenuation of the RF signal according to a desired level of protection at an input and/or output of the RF amplifier. According to another aspect, the RF level detector may control a switch to force the RF signal through a different switchable RF path.
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公开(公告)号：US11159130B2
公开(公告)日：2021-10-26
申请号：US16574036
申请日：2019-09-17
Applicant: pSemi Corporation
Inventor： Parvez Daruwalla , Joseph Porter Slaton
Abstract: Various methods and circuital arrangements for protection of an RF amplifier are presented. According to one aspect, the RF amplifier is part of switchable RF paths that include at least one path with one or more attenuators that can be used during normal operation to define different modes of operation of the at least one path. An RF level detector monitors a level of an RF signal during operation of any one of the switchable RF paths and forces the RF signal through the at least one path with one or more attenuators while controlling the attenuators to provide an attenuation of the RF signal according to a desired level of protection at an input and/or output of the RF amplifier.
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公开(公告)号：US11616475B2
公开(公告)日：2023-03-28
申请号：US17141726
申请日：2021-01-05
Applicant: pSemi Corporation
Inventor： Rong Jiang , Khushali Shah , Ravindranath D. Shrivastava , Parvez Daruwalla
Abstract: Circuits and methods for improving the noise figure (NF) of an amplifier, particularly an LNA, in high-gain modes while improving the IIP3 of the amplifier in low-gain modes. The source of an amplifier common-source FET is coupled to circuit ground thorough a degeneration circuit comprising a two-port inductor and a bypass switch coupled in parallel with the inductor. A switched feedback circuit is coupled between the gate of the common-source FET and a feedback node in the amplifier output signal path. During a low gain mode, the inductor is entirely bypassed and the enabled feedback circuit lowers the input impedance of the common-source FET and reduces the gain of the amplifier circuit, essentially eliminating the need for a degeneration inductor. During a high gain mode, the source of the common-source FET is coupled to circuit ground through the inductor and the feedback circuit is disabled. Other gain modes are supported.
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公开(公告)号：US11381268B1
公开(公告)日：2022-07-05
申请号：US17359084
申请日：2021-06-25
Applicant: pSemi Corporation
Inventor： Parvez Daruwalla , Sung Kyu Han
Abstract: Methods and devices for limiting the power level of low noise amplifiers (LNA) implemented in radio frequency (RF) receiver front-ends. The described methods are applicable to bypass, low and high gain modes of the LNA. According to the described methods, the decoder allows the signal to be clamped before or after being attenuated. The benefit of such methods is to improve large signal performances (e.g. IIP3, P1dB) of the RF receiver front-end, while still meeting the clamping requirements, or improve (lower) clamped output power, while still meeting large signal performances (e.g. IIP3, P1dB).
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公开(公告)号：US12101065B2
公开(公告)日：2024-09-24
申请号：US18492544
申请日：2023-10-23
Applicant: pSemi Corporation
Inventor： Miles Sanner , Emre Ayranci , Parvez Daruwalla
CPC classification number: H03F1/223 , H03F3/193 , H03F3/21 , H03F2200/294 , H03F2203/7236
Abstract: Methods and circuital arrangements for turning OFF branches of a multi-branch cascode amplifier are presented. First and second switching arrangements coupled to a branch allow turning OFF the branch while protecting transistors of the branch from a supply voltage that may be greater than a tolerable voltage of the transistors. The first switching arrangement includes a transistor-based switch that is in series connection with the transistors of the branch. The first switching arrangement drops the supply voltage during the OFF state of the branch and provides a conduction path for a current through the branch during the ON state of the branch. A resistor and a shunting switch are coupled to a gate of the transistor-based switch to reduce parasitic coupling effects of the transistor-based switch upon an RF signal coupled to the branch during the ON state and OFF state of the branch.
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Patent Agency Ranking
公开(公告)号：US11855640B2
公开(公告)日：2023-12-26
申请号：US17380001
申请日：2021-07-19
Applicant: pSemi Corporation
Inventor： Parvez Daruwalla , Khushali Shah
CPC classification number: H03K5/08 , H03F3/19 , H03G11/02 , H03F2200/294 , H03F2200/451
Abstract: Programmable clamping methods and devices providing adjustable clamping powers to accommodate different applications and requirements are disclosed. The described devices can use switchable clamping circuits having different structures, body-controlled clamping circuits, or clamping circuits adjusting their input power levels using programmable resistive ladders. Examples of how the disclosed devices can be combined to improve design flexibility are also provided.
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公开(公告)号：US11831280B2
公开(公告)日：2023-11-28
申请号：US18168346
申请日：2023-02-13
Applicant: pSemi Corporation
Inventor： Miles Sanner , Emre Ayranci , Parvez Daruwalla
CPC classification number: H03F1/223 , H03F3/193 , H03F3/21 , H03F2200/294 , H03F2203/7236
Abstract: Methods and circuital arrangements for turning OFF branches of a multi-branch cascode amplifier are presented. First and second switching arrangements coupled to a branch allow turning OFF the branch while protecting transistors of the branch from a supply voltage that may be greater than a tolerable voltage of the transistors. The first switching arrangement includes a transistor-based switch that is in series connection with the transistors of the branch. The first switching arrangement drops the supply voltage during the OFF state of the branch and provides a conduction path for a current through the branch during the ON state of the branch. A resistor and a shunting switch are coupled to a gate of the transistor-based switch to reduce parasitic coupling effects of the transistor-based switch upon an RF signal coupled to the branch during the ON state and OFF state of the branch.
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公开(公告)号：US12063016B2
公开(公告)日：2024-08-13
申请号：US17483316
申请日：2021-09-23
Applicant: pSemi Corporation
Inventor： Rong Jiang , Parvez Daruwalla , Khushali Shah
CPC classification number: H03F3/193 , H03F1/0205 , H03F3/21 , H03F2200/294 , H03F2200/451 , H03F2200/51
Abstract: Methods and devices to support multiple gain states in amplifiers are described. The methods and devices are based on implementing a feedback element in the amplifier and adjusting the impedance of the feedback element to provide a desired gain while maintaining the overall performance of the amplifier and reducing degradation of the S12 parameter. The feedback element includes an adjustable attenuator and a tunable resistive element. The adjustable attenuator is provided in a path that is common to the feedback path and the bypass path of the amplifier. Exemplary implementations of adjustable attenuators are also presented.
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公开(公告)号：US11848666B1
公开(公告)日：2023-12-19
申请号：US17831761
申请日：2022-06-03
Applicant: pSemi Corporation
Inventor： Joseph Porter Slaton , Parvez Daruwalla
IPC: H03K17/041
CPC classification number: H03K17/04106
Abstract: Methods and devices to reduce the switching time of radio frequency (RF) switches including antenna switches are disclosed. The disclosed teachings include selective bypassing of the capacitive and resistive elements of the circuit during the transition of RF switches from one state to another. Several implementations of the disclosed methods and devices are also presented.
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公开(公告)号：US20230396244A1
公开(公告)日：2023-12-07
申请号：US17831761
申请日：2022-06-03
Applicant: pSemi Corporation
Inventor： Joseph Porter Slaton , Parvez Daruwalla
IPC: H03K17/041
CPC classification number: H03K17/04106
Abstract: Methods and devices to reduce the switching time of radio frequency (RF) switches including antenna switches are disclosed. The disclosed teachings include selective bypassing of the capacitive and resistive elements of the circuit during the transition of RF switches from one state to another. Several implementations of the disclosed methods and devices are also presented.
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