Class D pulse width modulator with dual feedback
US8866544B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2012 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Jun 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This document discusses, among other things, a modulator including a first integrator configured to receive an input signal and a first feedback signal from an output stage, a second integrator configured to receive an output of the first integrator and a second feedback signal, and a comparator configured to be coupled to a regulated supply voltage, to receive an output of the second integrator and a modulation signal, and to provide a pulse width modulated representation of the input signal. The output stage is configured to be coupled to an unregulated supply voltage, and the second feedback signal can include a representation of an output of the comparator configured to reduce artifacts in the pulse width modulated representation of the input signal induced by changes in an amplitude of the unregulated supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.