FIR switched-capacitor decimators with active-delayed block polyphase structures

Author

Franca, J.E. ; Santos, S.

Author_Institution

Dept. de Engenheria Electrotecnica e de Computadores, Inst. Superior Tecnico, Lisbon, Portugal

Volume

35

Issue

8

fYear

1988

fDate

8/1/1988 12:00:00 AM

Firstpage

1033

Lastpage

1037

Abstract

Finite impulse-response (FIR) switched capacitor (SC) decimator circuits using previously proposed structures are not practical for applications requiring long impulse responses on account of a rather large (unrealistic) number of SC branches and switching waveforms. For such applications, polyphase structures are proposed that lead to FIR SC decimator circuits that use significantly fewer branches and switching waveforms, and are thus more attractive for integrated circuit implementation. The design of an FIR SC low-pass decimator with an amplitude response tailored for video interface applications is given as an example

Keywords

active filters; delays; low-pass filters; switched capacitor filters; FIR SC low-pass decimator; FIR switched-capacitor decimators; SC circuits; active filters; active-delayed block polyphase structures; amplitude response; finite impulse response; integrated circuit implementation; long impulse responses; video interface applications; Delay lines; Digital filters; Finite impulse response filter; Signal processing; Signal processing algorithms; Signal sampling; Smoothing methods; Speech processing; Switching circuits; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.1853

Filename

1853