Design techniques for high-resolution current-mode sigma-deltamodulators |
| |
Authors: | Moeneclaey N. Kaiser A. |
| |
Affiliation: | Dept. ISEN, CNRS, Lille; |
| |
Abstract: | This paper describes techniques for the design of high-resolution oversampling analog-to-digital converters based on current memories. A key point is the reduction of nonlinearities, in particular those introduced by the current switches. A current-memory cell with very high precision and linearity has been designed and used in an experimental third-order Σ-δ modulator in a 0.8-μm digital CMOS process. A linearity of better than 14 b and a maximum signal-to-noise+distortion ratio (SNDR) of 80 dB has been measured for an oversampling ratio (OSR) of 64 |
| |
Keywords: | |
|
|