Title :
Bandpass sigma-delta modulation using frequency translation
Author :
Tao, Hai ; Khoury, John M.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
Abstract :
A bandpass sigma-delta modulation Analog-to-Digital (A/D) converter that uses direct conversion to base-band with in phase and quadrature paths within the feedback loop is described. The bandpass input signal is processed with continuous-time circuitry and the I/Q base-band signals are processed with switched-capacitor circuits. Experimental and simulation results indicate that the passband center frequency can be maximized while suppressing the effects of I/Q mismatches
Keywords :
circuit feedback; modulators; sigma-delta modulation; switched capacitor networks; A/D converter; ADC; I/Q base-band signal processing; SC circuits; bandpass sigma-delta modulation; continuous-time circuitry; direct conversion; feedback loop; frequency translation; switched-capacitor circuits; Band pass filters; Baseband; Capacitors; Circuits; Delta-sigma modulation; Feedback loop; Frequency conversion; Resonant frequency; Signal processing; Signal resolution;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.666092
