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

Volume

2

fYear

1999

fDate

36342

Firstpage

13

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.1999.780474

Filename

780474