Design of a Digital Audio Module for Ultra-Low Power Cellular Applications
From iis-projects
Short Description
Cellular audio applications depend on an audio interface to connect a microphone/speaker. Acoustic waves, usually voice, are captured by a microphone, amplified and subsequently sampled into the digital domain by an Analog to Digital Converter (ADC). In the other direction a stream of digital audio samples is first mapped into the analog domain by and Digital to Analog Converter (DAC) and subsequently amplified to drive a speaker, where the analog signal is translated into acoustic waves.
A huge variety of integrated audio modules such as [1] exist on the marked. In cellular application an audio chip can be placed between microphone/speaker and a cellular modem. However, emerging applications, such as emergency watches [2], require highly integrated component due to their low footprint and extremely low power consumption.
Highly integrated cellular modems and ADC/DAC modules are under active research at the institute. In this project, the missing link to a microphone/speaker connection shall be designed. To this end, a switching amplifier supporting all common cellular audio standards (see [3,4]) shall be designed and integrated on a chip. This is a perfect learning opportunity for analog integrated circuits design.
Status: Available
- Looking for 1-2 Semester/Master students
- Contact: Benjamin Weber
Prerequisites
- Interest in audio applications and analog integrated circuits design
- Recommended course: Analog Integrated Circuits (AIC)
Character
- 20% Theory
- 80% Implementation
Professor
References
[3] 3GPP Codecs Specifications; GSM only
[4] 3GPP Codecs Specifications; 3G and beyond/GSM
