Title :
An oversampled multibit CMOS D/A converter for digital audio with 115-dB dynamic range
Author :
Schouwenaars, Hans J. ; Groeneveld, D. Wouter J ; Bastiaansen, Cornelis A A ; Termeer, Henk A H
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
fDate :
12/1/1991 12:00:00 AM
Abstract :
The analog part of a current-mode CMOS 5-b bidirectional digital/analog (D/A) converter for digital audio with 115-dB dynamic range and -90-dB distortion at 128-times oversampling is presented. The application of a multibit noise shaping approach combined with a sign-magnitude decoding in an oversampled D/A converter not only increases the dynamic range of the converter but also reduces the intermodulation sensitivity. A dynamic self-calibration technique is used to obtain the required relative accuracy and absolute linearity of the current sources. No laser or external trimming techniques are required
Keywords :
CMOS integrated circuits; Hi-Fi equipment; digital-analogue conversion; CMOS; D/A converter; DAC; current-mode; digital audio; dynamic self-calibration; intermodulation sensitivity; multibit noise shaping; oversampling; sign-magnitude decoding; Analog-digital conversion; CMOS process; Circuits; Dynamic range; Frequency; Linearity; Noise reduction; Noise shaping; Quantization; Signal to noise ratio;
Journal_Title :
Solid-State Circuits, IEEE Journal of
