Class D amplifier with bandwidth independent of load impedance
US6249182A · kind A · utility
13Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1999 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Nov 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2171
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high Q low pass filter removes the carrier from a Class D amplifier. Speaker impedance varies with frequency, and it is desirable for to drive 2, 4 and 8 ohm speakers. The bandwidth feedback compensation network 800 adds a pole-zero combination to the feedback loop to reduce the Q of the low pass filter and to maintain the bandwidth of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.