公开(公告)号：US20240250702A1

公开(公告)日：2024-07-25

申请号：US18626249

申请日：2024-04-03

Applicant: Psemi Corporation

Inventor： Parvez DARUWALLA ,  Rong JIANG ,  Sung Kyu HAN ,  Khushali SHAH

IPC: H04B1/00 ,  H04B1/04 ,  H04B1/10

CPC classification number: H04B1/0078 ,  H04B1/0458 ,  H04B1/10 ,  H04B2001/0408 ,  H04B2001/1054

Abstract: Methods and devices to support multiple frequency bands in radio frequency (RF) circuits are shown. The described methods and devices are based on adjusting the effective width of a transistor in such circuits by selectively disposing matching transistors in parallel with the transistor. The presented devices and methods can be used in RF circuits including low noise amplifiers (LNAs), RF receiver front-ends or any other RF circuits where input matching to wideband inputs is required.

公开(公告)号：US20230148375A1

公开(公告)日：2023-05-11

申请号：US18049002

申请日：2022-10-24

Applicant: pSemi Corporation

Inventor： Parvez DARUWALLA ,  Phanindra YERRAMILLI ,  Emre AYRANCI

IPC: H03F3/195 ,  H03F3/193 ,  H04B1/12 ,  H03F1/22

CPC classification number: H03F3/195 ,  H03F3/193 ,  H04B1/123 ,  H03F1/223 ,  H03F2200/372 ,  H03F2200/451

Abstract: Methods and devices to minimize or reduce phase discontinuity between different gain modes (including bypass, active and passive modes) with reduced increase in circuit size (footprint or number of components) and complexity, without impacting other performance parameters, are disclosed. Phase shifter elements that can be disposed in both the active and passive bypass paths are also described. Moreover, devices using the same reconfigurable phase shifter elements in both active and bypass modes are described. Components of the phase shifters can also perform output matching when the phase shifters are implemented as part of an RF receiver front-end.

公开(公告)号：US20220278653A1

公开(公告)日：2022-09-01

申请号：US17189141

申请日：2021-03-01

Applicant: pSemi Corporation

Inventor： Miles SANNER ,  Emre AYRANCI ,  Parvez DARUWALLA

IPC: H03F1/22 ,  H03F3/193 ,  H03F3/21

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.

公开(公告)号：US20240113665A1

公开(公告)日：2024-04-04

申请号：US18492544

申请日：2023-10-23

Applicant: pSemi Corporation

Inventor： Miles SANNER ,  Emre AYRANCI ,  Parvez DARUWALLA

IPC: H03F1/22 ,  H03F3/193 ,  H03F3/21

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.

公开(公告)号：US20230253926A1

公开(公告)日：2023-08-10

申请号：US18168346

申请日：2023-02-13

Applicant: pSemi Corporation

Inventor： Miles SANNER ,  Emre AYRANCI ,  Parvez DARUWALLA

IPC: H03F1/22 ,  H03F3/193 ,  H03F3/21

CPC classification number: H03F1/223 ,  H03F3/193 ,  H03F3/21 ,  H03F2203/7236 ,  H03F2200/294

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.

公开(公告)号：US20230090460A1

公开(公告)日：2023-03-23

申请号：US17483316

申请日：2021-09-23

Applicant: pSemi Corporation

Inventor： Rong JIANG ,  Parvez DARUWALLA ,  Khushali SHAH

IPC: H03F3/193 ,  H03F3/21 ,  H03F1/02

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.

公开(公告)号：US20230015675A1

公开(公告)日：2023-01-19

申请号：US17380001

申请日：2021-07-19

Applicant: pSemi Corporation

Inventor： Parvez DARUWALLA ,  Khushali SHAH

IPC: H03K5/08 ,  H03F3/19

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.

公开(公告)号：US20210083630A1

公开(公告)日：2021-03-18

申请号：US16574036

申请日：2019-09-17

Applicant: pSemi Corporation

Inventor： Parvez DARUWALLA ,  Joseph Porter Slaton

IPC: H03F1/52 ,  H03F3/195 ,  H03G11/04 ,  H04B1/16

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.