Title :
A 4th-order local-feedforward D/A converter that prevents limit-cycle oscillation
Author :
Matsuya, Y. ; Kado, Y. ; Terada, J. ; Eguchi, T. ; Tamura, M. ; Fujiwara, H.
Author_Institution :
NTT Telecommun. Engergy Labs., Kanagawa, Japan
Abstract :
Limit-cycle oscillation in noise-shaping D/A converters is one of serious problems because it interrupts their noise-shaping operation. We propose a new noise-shaping structure that prevents limit-cycle oscillation. We have used this structure in an audio D/A converter that we fabricated. The measured result shows that limit-cycle oscillation is prevented and noise-shaping operation is maintained even when the input data is real zero. This D/A converter achieves the S/N+THD of 101 dB.
Keywords :
CMOS integrated circuits; audio equipment; circuit oscillations; digital-analogue conversion; feedforward; integrated circuit noise; limit cycles; 4th-order DAC; CMOS process; audio DAC; limit-cycle oscillation prevention; local-feedforward DAC; noise-shaping D/A converters; noise-shaping operation; Audio systems; Digital circuits; Large-scale systems; Limit-cycles; Modems; Noise measurement; Noise shaping; Pulse width modulation; Quantization; Sampling methods;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2002. Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-7310-3
DOI :
10.1109/VLSIC.2002.1015119
