Dynamic bass control circuit with variable cut-off frequency
US6665408B1 · kind B1 · utility
7Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for providing a variable amount of bass control on an input signal dependent on a signal level of the input signal includes a high-pass filter, a variable impedance shunt connected to the output of the high-pass filter, and a signal level detector for controlling the variable impedance shunt. Depending on the signal level, the variable impedance shunt varies the Q value of the high-pass filter so that at low signal levels, the Q value is at its maximum while at high signal values, the Q value is lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.