Level crossing time interval circuit for micro-power analog VLSI auditory processing

Author

Kumar, Nagendra ; Cauwenberghs, Gert ; Andreou, Andreas G.

Author_Institution

Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA

fYear

1995

fDate

31 Aug-2 Sep 1995

Firstpage

581

Lastpage

590

Abstract

A low-power circuit for level crossing interval measurements on continuous-time auditory signals, as obtained from the outputs of an analog cochlear filter bank, has been designed and fabricated. Experimental results from a fabricated array of 9 level crossing transducers demonstrate frequency-to-voltage conversion over a range covering the audio band. The power consumption is less than 20 μW per cell from a 5 V supply, for the speech frequency range

Keywords

VLSI; analogue processing circuits; continuous time filters; delay circuits; speech processing; speech recognition; speech recognition equipment; voltage-frequency convertors; 20 muW; 5 V; analog cochlear filter bank; continuous-time auditory signals; frequency-to-voltage conversion; level crossing time interval circuit; micro-power analog VLSI; power consumption; speech frequency range; Algorithm design and analysis; Capacitors; Digital signal processing; Filter bank; Frequency; Integrated circuit measurements; Signal processing; Time measurement; Very large scale integration; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Neural Networks for Signal Processing [1995] V. Proceedings of the 1995 IEEE Workshop

Conference_Location

Cambridge, MA

Print_ISBN

0-7803-2739-X

Type

conf

DOI

10.1109/NNSP.1995.514933

Filename

514933