Audio communication unit and integrated circuit

Details Audio communication unit and integrated circuit Audio communication unit and integrated circuit

2011-08-16

2011-08-16

Flanders, Andrew C (Department: 2614)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Digital audio data processing system

Reexamination Certificate

active

08000821

ABSTRACT:
An audio communication unit comprises a receiver for receiving an audio signal, a sigma-delta modulator operably coupled to the receiver and arranged to modulate the received audio signal, and a class-D amplifier stage operably coupled to the sigma-delta modulator and arranged to amplify the modulated received audio signal. One or more feedback path(s) is/are arranged from an output of the class-D amplifier stage to the sigma-delta modulator. The provision of one or more feedback path(s) from the output of the class-D audio amplifier to the sigma-delta modulator facilitates smaller die size; higher power efficiency and power supply rejection ratio/intermodulation cancellation performance.

REFERENCES:
patent: 5777512 (1998-07-01), Tripathi et al.
patent: 5974089 (1999-10-01), Tripathi et al.
patent: 6380881 (2002-04-01), Harada et al.
patent: 7138859 (2006-11-01), Ohara et al.
patent: 7378904 (2008-05-01), Risbo
patent: 2005/0083116 (2005-04-01), Risbo et al.
patent: 1158663 (2006-10-01), None
“A Low Power Low Voltage Class D Amp Based on Sigma-Delta and Bang-Bang Control,” Tong et al. Copyright 2000 IEEE 2004 IEEE International Workshop on Biiomedial Circuits & Systems.
Horowitz et al; “The Art of Electronics, 2nd Edition”, 1989, Cambridge, UK, pp. 775-776, fig 11.15.

Affiliated with

Also associated with

Rating

Audio communication unit and integrated circuit 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 communication unit and integrated circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio communication unit and integrated circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2728507