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：US20220263520A1

公开(公告)日：2022-08-18

申请号：US17232949

申请日：2021-04-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Axel THOMSEN ,  John L. MELANSON ,  Mujo KOZAK ,  Paul WILSON ,  Eric J. KING

IPC: H03M3/00 ,  G01R31/3828 ,  G01R31/36

Abstract: A signal processing system may include a sensor readout channel configured to convert an electronic signal into a digital quantity, the sensor readout channel comprising an analog-to-digital converter (ADC) having an input and an output, first outside chopping switches located at the input of the ADC, and second outside chopping switches located at the output of the ADC. The ADC may comprise a memory element, first inside chopping switches located at the input of the memory element, and second inside chopping switches located at the output of the memory element. The first outside chopping switches, the second outside chopping switches, the first inside chopping switches, and the second inside chopping switches may be switched at the same frequency such that the memory element is swapped periodically in synchronization with the first outside chopping switches and second outside chopping switches.