Title :
A High-Frequency and High-Resolution Fourth-Order ΣΔ A/D Converter in BICMOS Technology
Author :
Yin, G.M. ; Sansen, W.
Author_Institution :
K. U. Leuven, Dept. Elektrotechniek, ESAT-MICAS, Kardinaal Mercierlaan 94, 3001 Heverlee, Belgium
Abstract :
A high-performance cascaded sigma-delta modulator is presented. It has a new three-stage fourth-order topology and provides a maximum signal to quantization noise ratio of 16 bits and 16.5-bit dynamic range with an oversampling ration of only 32. This modulator is implemented with fuly differential swith-capacitor circuits and is manufactured in a 2-μm BICMOS process. The converter achieves 97 dB resolution at a Nyquist conversion rate of 1.5 MHz after comb-filtering decimation. the oversampling frequency is 48 MHz. This circuit is operated from +/-2.5 V power supply and +/-1.25 V reference volltage and consumes 180 mW.
Keywords :
BiCMOS integrated circuits; Circuit noise; Circuit topology; Delta-sigma modulation; Dynamic range; Frequency conversion; Manufacturing processes; Quantization; Signal resolution; Signal to noise ratio;
Conference_Titel :
Solid-State Circuits Conference, 1993. ESSCIRC '93. Nineteenth European
Conference_Location :
Sevilla, Spain
Print_ISBN :
2-86335-134-X
