Title :
A switched-capacitor delta-sigma modulator with reduced sensitivity to op-amp gain
Author :
Hurst, Paul J. ; Levinson, Roger A. ; Block, David J.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA
fDate :
6/1/1993 12:00:00 AM
Abstract :
Low operational amplifier (op-amp) gain can degrade the performance of a switched-capacitor delta-sigma modulator (ΔΣM). A ΔΣM that incorporates a new gain-compensated switched-capacitor integrator is described. The resulting ΔΣM topology has reduced sensitivity to op-amp gain. Simulation and measurement results for an experimental ΔΣM that demonstrate the advantages of the new architecture are presented
Keywords :
compensation; delta modulation; integrating circuits; modulators; operational amplifiers; switched capacitor networks; SC circuit; delta-sigma modulator; gain compensated integrator; op-amp gain; operational amplifier; switched-capacitor; Baseband; Capacitors; Circuits; Degradation; Delta modulation; Operational amplifiers; Performance gain; Quantization; Signal to noise ratio; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
