公开(公告)号：US20170180858A1

公开(公告)日：2017-06-22

申请号：US15198809

申请日：2016-06-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Sunder S. KIDAMBI ,  John C. TUCKER ,  Aleksey KHENKIN

IPC: H04R3/06 ,  H04R29/00

CPC classification number: H04R3/06 ,  H04R29/004 ,  H04R2201/003

Abstract: In accordance with embodiments of the present disclosure, a system may include a digital correcting network for correcting for an intrinsic highpass filter of a microelectromechanical systems (MEMS) microphone such that a combined phase and magnitude response of a cascade of the intrinsic highpass filter and the digital correcting network substantially approximates the response of a target highpass filter.

公开(公告)号：US20210281270A1

公开(公告)日：2021-09-09

申请号：US17167957

申请日：2021-02-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Sunder S. KIDAMBI ,  Mohit SOOD

IPC: H03M1/06 ,  H03H17/06 ,  H02M1/00

Abstract: An analog-to-digital conversion system may include an analog-to-digital converter configured to convert an analog input signal into an equivalent digital input signal, a first filtering path configured to filter the equivalent digital input signal to generate a first filtered digital signal, wherein the first filtering path comprises a zero-overshoot monotonic step response filter, a second filtering path configured to filter the equivalent digital input signal to generate a second filtered digital signal, wherein the second filtering path comprises a frequency-selective filter; and a mixer configured to either: (i) select between the first filtered digital signal and the second filtered digital signal in order to generate an output digital signal; or (ii) combine selected proportions of each of the first filtered digital signal and the second filtered digital signal in order to generate the output digital signal.