IC design of an analog tunable crossover network

Author

Barúqui, Fernando A P ; Petraglia, Antonio ; Rapoport, Eduardo

Author_Institution

COPPE, Fed. Univ. of Rio de Janeiro, Brazil

fYear

2005

fDate

23-26 May 2005

Firstpage

1012

Abstract

This paper presents a tunable crossover circuit for audio applications, to be implemented in a standard 0.35 μm CMOS process. The circuit is based on the decomposition of low-pass and high-pass transfer functions into two structurally all-pass building blocks. The transconductors (OTA) incorporate source degenerated current mirrors (SDCM), to allow wide and highly linear tuning range, while keeping the input and output signal swings constant. Simulation results, with practical process parameters, are presented.

Keywords

CMOS analogue integrated circuits; all-pass filters; audio signal processing; circuit tuning; continuous time filters; current mirrors; high-pass filters; low-pass filters; operational amplifiers; transfer functions; 0.35 micron; CMOS; OTA; SDCW; all-pass building blocks; analog tunable crossover network; audio crossover circuit; continuous time filters; high-pass transfer functions; low-pass transfer functions; source degenerated current mirrors; transconductors; tunable amplifiers; wide linear tuning range; Analog integrated circuits; Circuit optimization; Dynamic range; Filters; Frequency; Loudspeakers; Mirrors; Transfer functions; Tunable circuits and devices; Tuning; Continuous time filter; OTA; crossover; tunable amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1464762

Filename

1464762