Integrated mixed-mode digital-analog filter converters

Author

Vital, João ; Franca, José E. ; Maloberti, Franco

Author_Institution

Dept. de Eng. Electrotecnica e de Comput., Inst. Superior Tecnico, Lisboa, Portugal

Volume

25

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

660

Lastpage

668

Abstract

Alternative architectures have been investigated for the integrated realization of DAFICs (digital-analog filter converters), taking into account such important design parameters as capacitance spread and total capacitor area, conversion speed and resolution, and the hardware complexity of the analog and digital parts. To demonstrate the feasibility of this novel building block, an experimental prototype algorithmic DAFIC with 8-b resolution and four FIR (finite impulse response) filtering coefficients was integrated using a 3-μm single-metal/double-poly CMOS process. Experimental results are shown to be in good agreement with the expected theoretical behavior. Preliminary work indicates that the DAFIC building block possesses significant practical advantages for the implementation of adaptive transversal structures required in baseband digital transmission applications with echo cancellation

Keywords

CMOS integrated circuits; application specific integrated circuits; digital filters; digital-analogue conversion; 3 micron; DAFICs; FIR; adaptive transversal structures; baseband digital transmission applications; capacitance spread; conversion speed; echo cancellation; filtering coefficients; hardware complexity; mixed-mode digital-analog filter converters; resolution; single-metal/double-poly CMOS process; total capacitor area; Analog-digital conversion; Capacitance; Capacitors; Digital filters; Digital-analog conversion; Filtering algorithms; Finite impulse response filter; Hardware; Prototypes; Transversal filters;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.102658

Filename

102658