Title :
On the design of 2nd order multi-bit ΔΣ-modulators
Author :
Lindfors, Saska ; Länsirinne, Mika ; Lindeman, Tommi ; Halonen, Kari
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
The design aspects of multibit ΔΣ-modulators are discussed. The loop filter design of a 2nd order multibit modulator is covered in more detail with the emphasis on the optimisation of the dynamic range and the trade-off between SNR and the power consumption. It is shown with behavioural level simulations that the peak SNR is reached with an overloaded quantizer and that an aggressive loop filter tends to increase the power consumption of the amplifiers
Keywords :
CMOS integrated circuits; circuit feedback; delta-sigma modulation; integrated circuit noise; switched capacitor networks; transfer functions; 2nd order ΔΣ-modulators; DAC; behavioural level simulations; dynamic range optimisation; loop filter design; multi-bit ΔΣ-modulators; overloaded quantizer; peak SNR; power consumption; second-order delta-sigma modulators; Design optimization; Dynamic range; Electronic circuits; Energy consumption; Feedback; Laboratories; Nonlinear filters; Quantization; Signal to noise ratio; Transfer functions;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780474
