公开(公告)号：US20200162098A1

公开(公告)日：2020-05-21

申请号：US16683859

申请日：2019-11-14

Applicant: STMicroelectronics KK

Inventor： Ryo Tsutsui

IPC: H03M3/00 ,  H03M1/06 ,  G06F7/58

Abstract: A method of filtering includes generating a random value by a random number generator circuit, filtering a first signal by a first filter to form a filtered first signal, dithering the filtered first signal using the random value to form a dithered first signal, filtering a second signal by a second filter to form a filtered second signal, and dithering the filtered second signal using the random value to form a dithered second signal.

公开(公告)号：US20220231697A1

公开(公告)日：2022-07-21

申请号：US17657991

申请日：2022-04-05

Applicant: STMicroelectronics KK

Inventor： Ryo Tsutsui

IPC: H03M3/00 ,  G06F7/58 ,  H03M1/06

Abstract: An infinite impulse response filter includes a plurality of lower order filter stages and a random number generator circuit. The plurality of lower order filter stages include a first filter stage coupled to a second filter stage. The random number generator circuit includes a first output coupled to the first filter stage and a second output coupled to the second filter stage. The random number generator circuit is configured to generate the same random value at both the first output and the second output. The infinite impulse response filter is an nth-order filter. The respective order of each of the lower order filter stages is less than n.

公开(公告)号：US11804849B2

公开(公告)日：2023-10-31

申请号：US17657991

申请日：2022-04-05

Applicant: STMicroelectronics KK

Inventor： Ryo Tsutsui

IPC: H03M3/00 ,  G06F7/58 ,  H03M1/06 ,  H03H17/00 ,  H03H17/02

CPC classification number: H03M3/33 ,  G06F7/588 ,  H03M1/0626 ,  G06F2207/583 ,  H03H17/0213 ,  H03H2017/0072

Abstract: An infinite impulse response filter includes a plurality of lower order filter stages and a random number generator circuit. The plurality of lower order filter stages include a first filter stage coupled to a second filter stage. The random number generator circuit includes a first output coupled to the first filter stage and a second output coupled to the second filter stage. The random number generator circuit is configured to generate the same random value at both the first output and the second output. The infinite impulse response filter is an nth-order filter. The respective order of each of the lower order filter stages is less than n.

公开(公告)号：US11323130B2

公开(公告)日：2022-05-03

申请号：US16683859

申请日：2019-11-14

Applicant: STMicroelectronics KK

Inventor： Ryo Tsutsui

IPC: G06F7/58 ,  H03H17/00 ,  H03H17/02 ,  H03M3/00 ,  H03M1/06

Abstract: A method of filtering includes generating a random value by a random number generator circuit, filtering a first signal by a first filter to form a filtered first signal, dithering the filtered first signal using the random value to form a dithered first signal, filtering a second signal by a second filter to form a filtered second signal, and dithering the filtered second signal using the random value to form a dithered second signal.