Title :
FRC: a method for extending the resolution of Nyquist rate converters using oversampling
Author :
Harjani, Ramesh ; Lee, Tom A.
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
Nyquist rate converters have traditionally been used for low to moderate resolution data acquisition applications. In this paper, we describe a feedforward residue compensation (FRC) technique to extend the resolution of such converters using an oversampling modulator loop. Closed-form analytical expressions are developed to provide insight into the operation and limits on the resolution of such converters. Simulation results are used to verify the operation and confirm the limitations of this technique
Keywords :
analogue-digital conversion; compensation; feedforward; sigma-delta modulation; Nyquist rate converters; feedforward residue compensation; oversampling; oversampling modulator loop; resolution extension; Analog-digital conversion; Capacitors; Data acquisition; Digital filters; Linearity; Low pass filters; Low-frequency noise; Noise reduction; Noise shaping; Quantization;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
