Transfer function design for ΔΣ converters

Author

Jantzi, S. ; Ouslis, C. ; Sedra, A.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

Volume

5

fYear

1994

fDate

30 May-2 Jun 1994

Firstpage

433

Abstract

A methodology is presented for the design of noise and signal transfer functions for delta-sigma modulators. A computerised optimiser is used to produce maximal noise-shaping, while meeting those constraints necessary to realise a usable modulator. The design of higher-order modulators is possible, as is the design of unique noise-shaping functions such as for bandpass modulators, complex modulators, or modulators with psychoacoustically-shaped in-band noise. Optimisation of the transfer function from modulator input to output is also possible if special conditioning of the input signal is desired

Keywords

circuit CAD; circuit noise; circuit optimisation; modulators; sigma-delta modulation; transfer functions; ΔΣ converters; bandpass modulators; complex modulators; computerised optimiser; delta-sigma modulators; higher-order modulators; maximal noise-shaping; noise-shaping functions; psychoacoustically-shaped in-band noise; transfer function design; Band pass filters; Delta modulation; Filtering; Frequency conversion; Noise reduction; Noise shaping; Psychoacoustic models; Psychology; Signal design; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-1915-X

Type

conf

DOI

10.1109/ISCAS.1994.409402

Filename

409402