Title :
A 2GS/s 3b ΔΣ-modulated DAC with a tunable switched-capacitor bandpass DAC mismatch shaper
Author :
Jensen, J.F. ; Fields, C.H. ; Chang, M.F.
Abstract :
A 3b ΔΣ-modulated mismatch-shaped DAC is presented. The mismatch shaper uses 7 tunable 1.5b switched-capacitor bandpass ΔΣ modulators to dynamically route the digital signals to the DACs. The DAC can generate narrowband signals from 250 to 750MHz with ≥68dB SNR, ≥74dB SFDR, and -80dBc intermodulation distortion.
Keywords :
band-pass filters; bipolar integrated circuits; delta-sigma modulation; intermodulation distortion; switched capacitor filters; 250 to 750 MHz; Gilbert cell; HBT process; delta-sigma-modulated DAC; intermodulation distortion; mismatch-shaped DAC; narrowband signals; router architecture; switched-capacitor bandpass modulator; tunable mismatch shaper; Decoding; Delay; Digital modulation; Frequency; Shape control; Signal generators; Switches; Transconductors; Tunable circuits and devices; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2004. Digest of Technical Papers. ISSCC. 2004 IEEE International
Print_ISBN :
0-7803-8267-6
DOI :
10.1109/ISSCC.2004.1332746
