A low-voltage ultra-low-power translinear integrator for audio filter applications

Author

Serdijn, Wouter A. ; Broest, Martijn ; Mulder, Jan ; van der Woerd, Albert C. ; Van Roermund, Arthur H M

Author_Institution

Fac. of Electr. Eng., Delft Univ. of Technol., Netherlands

Volume

32

Issue

4

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

577

Lastpage

581

Abstract

In this paper, the design and measurement of a l-V translinear integrator and its application in a controllable second-order lowpass filter for hearing instruments is presented. A semicustom version of the filter has been integrated in a standard 2-μm, 7-GHz, bipolar IC process and operates at voltages down to 1 V, consumes only 6 μA, and has a dynamic range of 57 dB for a total harmonic distortion below 2%. Its cutoff frequency is linearly adjustable in octaves from 1.6 to 8 kHz

Keywords

active filters; audio equipment; bipolar analogue integrated circuits; harmonic distortion; integrated circuit measurement; integrating circuits; low-pass filters; 1.6 to 8 kHz; 2 micron; 6 muA; 7 GHz; audio filter applications; bipolar IC process; controllable second-order lowpass filter; dynamic range; hearing instruments; linearly adjustable cutoff frequency; semicustom version; total harmonic distortion; ultra-low-power translinear integrator; Active filters; Analog integrated circuits; Auditory system; Bipolar transistors; Capacitors; Differential equations; Dynamic range; Instruments; Transfer functions; Voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.563680

Filename

563680