Title :
Full digital driving voice and audio load on an IC
Author :
Liu, Dake ; Nilsson, Ronny ; Norlin, Fredrik
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Sweden
fDate :
29 June-1 July 2002
Abstract :
This paper presents a study of how digital to analog conversion for low cost voice-audio can be achieved without analog components. The idea is to use an 1-bit oversampling digital to analog converter and utilize the fact that a loudspeaker has a very limited frequency bandwidth. Several methods to implement 1-bit digital to analog converters are thoroughly discussed. Functional design and verification as well as low power design are done. The design is implemented in a 0.35μ full-custom ASIC. The measured power consumption is 0.056 mW when supply voltage is 2.5V. The solution is suitable for voice and audio terminals for communications.
Keywords :
application specific integrated circuits; audio signal processing; digital-analogue conversion; driver circuits; low-power electronics; speech processing; 0.056 mW; 0.35 micron; 1 bit; 2.5 V; communication terminal; digital driving IC; digital-to-analog converter; full-custom ASIC; functional design; functional verification; loudspeaker; low power design; voice-audio load; Analog integrated circuits; Application specific integrated circuits; Bandwidth; Costs; Digital integrated circuits; Digital-analog conversion; Energy consumption; Frequency conversion; Loudspeakers; Power measurement;
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
DOI :
10.1109/ICCCAS.2002.1179064
