Minimizing total harmonic distortion and power supply induced intermodulation distortion in a single-ended class-d pulse width modulation amplifier
US11489498B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2021 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Jun 3, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0081
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier system may include a first stage having a plurality of inputs configured to receive a differential pulse-width modulation input signal and generate an intermediate signal based on the differential pulse-width modulation input signal, a quantizer configured to generate a modulated signal based on the intermediate signal, a single-ended class-D output stage configured to generate a single-ended output signal as a function of the differential pulse-width modulation input signal, a feedback network configured to feed back the single-ended output signal to a first input of the plurality of inputs and to feed back a ground voltage to a second input of the plurality of inputs, a plurality of buffers, each particular buffer configured to receive a respective component of the differential pulse-width modulation input signal and generate a respective buffered component, and an input network coupled between the plurality of buffers and the first stage. Each particular buffer of the plurality of buffers may include a buffering subcircuit configured to buffer the respective component of the differential pulse-width modulation input signal associated with the particular buffer in or…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.