Development of parametric equalizer LSI

Author

Matsuda, Yoshiaki ; Nagasawa, Naobumi ; Nomura, Yoshinobu

Author_Institution

Sanyo Electr. Co. Ltd., Gunma, Japan

Volume

36

Issue

3

fYear

1990

fDate

8/1/1990 12:00:00 AM

Firstpage

354

Lastpage

359

Abstract

A novel parameteric equalizer LSI that features advanced functions and improved cost performance is described. The development objectives were to: (1) improve functional levels to exceed those of conventional graphic equalizers; (2) miniaturize all hardware components in a small package; (3) minimize required external parts; (4) improve operability and processing speed; and (5) maintain the performance of discrete systems. The parametric equalizer LSI has the following functions: (1) controls 8-band stereo sound; (2) controls center frequency in 11 steps (1/3 octave between steps); (3) sets gain to one of 13 positions (in steps of 2 dB); (4) adjusts resonance sharpness in 8 steps from 1/6 to 3 octaves; and (5) selects peaking or shelving for high and low bands

Keywords

BIMOS integrated circuits; Hi-Fi equipment; equalisers; large scale integration; parametric devices; BiCMOS; center frequency control; gain setting; parametric equalizer LSI; peaking/shelving selection; resonance sharpness; stereo sound control; Acoustic devices; Band pass filters; Capacitors; Cost function; Equalizers; Graphics; Large scale integration; Operational amplifiers; Resonance; Resonant frequency;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.103144

Filename

103144