公开(公告)号：US20220247372A1

公开(公告)日：2022-08-04

申请号：US17162229

申请日：2021-01-29

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Wei XU ,  Ravi KUMMARAGUNTLA ,  Paul WILSON ,  Mujo KOZAK ,  Christian LARSEN ,  John L. MELANSON ,  Yongjie CHENG

IPC: H03F3/45

Abstract: A system may include a front end differential amplifier having two input terminals, two input resistors, each of the two input resistors coupled to a respective one of the two input terminals, and an input common mode biasing circuit for an output stage of the front end differential amplifier, the input common mode biasing circuit comprising two current sources configured to generate currents for biasing the output stage of the front end differential amplifier.

公开(公告)号：US20230122151A1

公开(公告)日：2023-04-20

申请号：US17848550

申请日：2022-06-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Zhaohui HE ,  Neel PRAMANIK ,  Lingli ZHANG ,  Wei XU ,  Prashanth DRAKSHAPALLI

IPC: H03F3/45

Abstract: A method for calibrating a fully-differential input system may include determining a first voltage of a first node of the fully-differential input system, wherein the first node is coupled at the first node to a plurality of first resistors in a first star configuration, determining a second voltage of a second node of the fully-differential input system, wherein the second node is coupled at the second node to a plurality of second resistors in a second star configuration, each resistor of the plurality of second resistors corresponding to a respective resistor of the plurality of first resistors, and trimming individual resistances of the plurality of first resistors and the plurality of second resistors in order to maintain a difference of a first voltage at the first node and a second voltage of the second node at approximately zero.

公开(公告)号：US20230122394A1

公开(公告)日：2023-04-20

申请号：US17502689

申请日：2021-10-15

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ramin ZANBAGHI ,  Lingli ZHANG ,  Wei XU ,  Justin RICHARDSON ,  John L. MELANSON

IPC: G01R19/25 ,  H03F3/217

Abstract: A system for sensing an electrical quantity may include a sensing stage configured to sense the electrical quantity and generate a sense signal indicative of the electrical quantity, wherein the electrical quantity is indicative of an electrical signal generated by a Class-DG amplifier configured to drive a load wherein the Class-DG amplifier has multiple signal-level common modes and a common-mode compensator configured to compensate for changes to a common-mode voltage of a differential supply voltage of the driver occurring when switching between signal-level common modes of the Class-DG amplifier.