公开(公告)号：US20240048108A1

公开(公告)日：2024-02-08

申请号：US17881845

申请日：2022-08-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Arashk NOROUZPOURSHIRAZI ,  Ravi K. KUMMARAGUNTLA

IPC: H03F3/45

CPC classification number: H03F3/45179 ,  H03F2203/45512

Abstract: A bootstrapped switch circuit may include a signal switch configured to, when enabled via a gate terminal of the signal switch during a sampling phase of the bootstrapped switch circuit, pass an input signal received at its input to its output. The bootstrapped switch circuit may also include a bootstrap circuit coupled to the signal switch comprising a bootstrap capacitor and a plurality of switches coupled to the bootstrap capacitor, wherein one of the plurality of switches comprises a p-type field effect transistor configured to decouple, by deactivating a second p-type field effect transistor, the bootstrap capacitor during a bootstrap phase of the bootstrapped switch circuit in which the signal switch is disabled, and further wherein the p-type field effect transistor is coupled to other of the plurality of switches and the bootstrap capacitor such that the signal switch is able to pass the input signal having a magnitude greater than voltage supply rails of the bootstrapped switch circuit from the input to the output.

公开(公告)号：US20240053387A1

公开(公告)日：2024-02-15

申请号：US17884753

申请日：2022-08-10

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Arashk NOROUZPOURSHIRAZI ,  Stephen T. HODAPP ,  Ravi K. KUMMARAGUNTLA ,  Axel THOMSEN

IPC: G01R19/25

CPC classification number: G01R19/2506

Abstract: A system may include a passive floating attenuator configured to receive an analog physical quantity and attenuate the analog physical quantity to a floating attenuated signal defined by voltage nodes other than the voltage nodes of the analog physical quantity, an anti-aliasing filter configured to filter the floating attenuated signal to generate a filtered attenuated signal, and a switched-capacitor sampling circuit comprising a plurality of switches configured to sample the filtered attenuated signal.

公开(公告)号：US20240106448A1

公开(公告)日：2024-03-28

申请号：US17952863

申请日：2022-09-26

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Arashk NOROUZPOURSHIRAZI ,  Ramin ZANBAGHI ,  Stephen T. HODAPP ,  Christophe J. AMADI ,  Ravi K. KUMMARAGUNTLA ,  Dhrubajyoti DUTTA

IPC: H03M1/06

CPC classification number: H03M1/0617

Abstract: A system may include a sampling capacitor and a switch network. The switch network may include one or more first sampling switches electrically coupled to the sampling capacitor and configured to be activated during a first phase of a sampling cycle of the system and one or more second sampling switches electrically coupled to the sampling capacitor and configured to be activated during a second phase of the sampling cycle, wherein the switch network is configured to reset the sampling capacitor to a data-independent and/or signal-independent charge during a reset phase of the sampling cycle.

公开(公告)号：US20240080034A1

公开(公告)日：2024-03-07

申请号：US17939166

申请日：2022-09-07

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Arashk NOROUZPOURSHIRAZI ,  John L. MELANSON ,  Axel THOMSEN

IPC: H03M1/06 ,  H03L7/099 ,  H03M1/10

CPC classification number: H03M1/0629 ,  H03L7/0991 ,  H03M1/1009

Abstract: A method may include, for a signal path comprising a passive antialiasing filter sampled by a switched-capacitor front-end, monitoring a change of a first impedance of a resistor of the passive antialiasing filter responsive to an environmental condition relative to a second impedance of a switched capacitor of the switched-capacitor front end and compensating the signal path for a change in gain of the signal path resulting from the change of the first impedance.

公开(公告)号：US20240072823A1

公开(公告)日：2024-02-29

申请号：US17895897

申请日：2022-08-25

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Arashk NOROUZPOURSHIRAZI ,  John L. MELANSON ,  Axel THOMSEN

IPC: H03M3/00

CPC classification number: H03M3/38 ,  H03M3/344 ,  H03M3/458

Abstract: In accordance with embodiments of the present disclosure, a method may include, in a system comprising a differential filter comprising a plurality of impedance elements, applying a common-mode signal to the differential filter, measuring an output signal of the differential filter in response to the common-mode signal to determine an error due to impedance mismatch of the impedance elements, and tuning one or more of the plurality of impedance elements to minimize the error.

公开(公告)号：US20240056095A1

公开(公告)日：2024-02-15

申请号：US17885126

申请日：2022-08-10

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Arashk NOROUZPOURSHIRAZI ,  Stephen T. HODAPP ,  Ravi K. KUMMARAGUNTLA ,  Paul WILSON ,  Axel THOMSEN

IPC: H03M3/00 ,  H02M3/07

CPC classification number: H03M3/496 ,  H02M3/07

Abstract: A system may include a switched-capacitor analog front end comprising a plurality of switches for sampling an analog physical quantity and a bootstrap generation network electrically coupled to the plurality of switches and configured to generate a bootstrap sampling clock for controlling the plurality of switches and generate a floating supply voltage for the bootstrap sampling clock based on the analog physical quantity.