Class D amplifier with passive RC network
US6621335B2 · kind B2 · utility
7Cited by
15References
36Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Feb 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2171
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class D amplifier device with reduced power consumption uses a passive RC network. The output of the RC network directly feeds a comparator resulting in increased efficiency. The RC network is configured to perform several functions, including the low pass filtering of the feedback signal to remove high frequency/high amplitude clock components and provides a DC path from its output to reduce duty cycle errors. Additionally, the input signal receives low pass filtering, creating a generally flat frequency response. Finally, the clock signal is filtered to generate a triangle wave of good linearity and appropriate amplitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.