Minimizing idle channel noise in a class-D pulse width modulation amplifier
US11190148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2020 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Mar 6, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system may include a forward signal path having a forward gain and configured to receive an input signal at an input and generate an output signal at an output as a function of the input signal, a feedback signal path having a feedback gain and coupled between the output and the input, and a control subsystem configured to operate the forward signal path and the feedback signal path in at least two modes comprising a first mode in which the forward gain is a first forward gain and the feedback gain is a first feedback gain and a second mode in which the forward gain is a second forward gain smaller than the first forward gain and the feedback gain is a second feedback gain larger than the first feedback gain. The control subsystem may cause operation in the first mode when signal content is present in the input signal and may cause operation in the second mode when signal content is absent from the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.