公开(公告)号：US20250119122A1

公开(公告)日：2025-04-10

申请号：US18987031

申请日：2024-12-19

Applicant: Infineon Technologies AG

Inventor： Reinhard Kussian ,  Andrea Manzini

IPC: H03H17/06 ,  H03H17/00 ,  H03H17/02

Abstract: Methods and apparatus are provided for adapting gain elements in digital filter chains. In one example, a digital filter chain includes a first digital filter and a second digital filter. The first digital filter includes a fixed point finite impulse response (FIR) filter and includes an output gain element. The second digital filter has an input coupled to an output of the first digital filter and includes an IIR filter. The output gain element applies a common output gain value that is based on a product of an input gain configured in association with the second digital filter and an FIR output gain that is based on a scaling factor K associated with the first digital filter.

公开(公告)号：US12206381B2

公开(公告)日：2025-01-21

申请号：US18100601

申请日：2023-01-24

Applicant: Infineon Technologies AG

Inventor： Reinhard Kussian ,  Andrea Manzini

IPC: H03H17/06 ,  H03H17/00 ,  H03H17/02

Abstract: Methods and apparatus are provided for adapting gain elements in digital filter chains. In one example, a digital filter chain includes a first digital filter and a second digital filter having an input coupled to an output of the first digital filter. A common gain is applied to signal samples passing between the first digital filter and the second digital filter, the common gain corresponding to a product of an output gain associated with the first digital filter and an input gain associated with the second digital filter. In another example, a digital filter includes an adjustable input gain element and an adjustable output gain element. The adjustable input gain element is configured to apply a gain value to an input signal sample, the gain value comprising a resultant difference of a bitshift configured for the digital filter and a bitwidth extension value. The adjustable output gain element is configured to apply an opposite of the gain value to an output signal sample.

公开(公告)号：US20240250666A1

公开(公告)日：2024-07-25

申请号：US18100601

申请日：2023-01-24

Applicant: Infineon Technologies AG

Inventor： Reinhard Kussian ,  Andrea Manzini

IPC: H03H17/06 ,  H03H17/00 ,  H03H17/02

CPC classification number: H03H17/06 ,  H03H17/0027 ,  H03H17/0219 ,  H03H17/0275 ,  H03H2017/0692

Abstract: Methods and apparatus are provided for adapting gain elements in digital filter chains. In one example, a digital filter chain includes a first digital filter and a second digital filter having an input coupled to an output of the first digital filter. A common gain is applied to signal samples passing between the first digital filter and the second digital filter, the common gain corresponding to a product of an output gain associated with the first digital filter and an input gain associated with the second digital filter. In another example, a digital filter includes an adjustable input gain element and an adjustable output gain element. The adjustable input gain element is configured to apply a gain value to an input signal sample, the gain value comprising a resultant difference of a bitshift configured for the digital filter and a bitwidth extension value. The adjustable output gain element is configured to apply an opposite of the gain value to an output signal sample.