Audio superpositioning

Details Audio superpositioning Audio superpositioning

2002-04-30

2008-10-07

Jamal, Alexander (Department: 2614)

Electrical audio signal processing systems and devices

With mixer

C381S120000

Reexamination Certificate

active

07433477

ABSTRACT:
A circuit, which is enabling the superpositioning of different audio signals such as voice, music or ringer signals in a audio output device is achieved. The individual superpositioning can be activated and performed by a combination of resistors and switches without the need of an additional mixing amplifier as in prior art. One common output stage is used for all the signals activated and superpositioned. The adjustment of the amplitude of the output signal, which can be used for the volume adjustment of a loudspeaker, is provided by a precise amplitude setting via the gain control stages of an inverting voltage amplifier through a current-voltage conversion. Said current-voltage conversion is performed by a string of resistors activated by a string of correspondent switches. This circuit reduces the power consumption, the chip area required and the offset and improves the power supply rejection rate (PSSR).

REFERENCES:
patent: 4201895 (1980-05-01), Hill, Jr.
patent: 5541543 (1996-07-01), Arnaud
patent: 5894212 (1999-04-01), Balogh
patent: 5946608 (1999-08-01), Morita et al.
patent: 6147558 (2000-11-01), Sculley
patent: 6404892 (2002-06-01), Heyl
U.S. Patent Application to Klaus Graef and Edgar Sexauer, U.S. Appl. No. 09/995,195, filed Nov. 27, 2001, “Combine Audio and Ringing Mode”.

Affiliated with

Also associated with

Rating

Audio superpositioning does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Audio superpositioning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio superpositioning will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4005314