Mixed-signal correlator for acoustic transient classification

R. Timothy Edwards, Gert Cauwenberghs, Fernando J. Pineda

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


Correlation computations are widely used in template-based temporal pattern recognition, but are expensive to compute in real time on DSP systems. We have designed and fabricated a low-power chip which uses current-mode analog circuits to computer the correlation between an auditory input signal in the time-frequency domain and a stored binary template. We use a bucket-brigade device (BBD) to accumulate partial column sums over time at rates consistent with the auditory-band input. Experimental results of the correlator demonstrate its correct operation over a wide range of operating frequencies.

Original languageEnglish (US)
Pages (from-to)621-624
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - Jan 1 1997
EventProceedings of the 1997 IEEE International Symposium on Circuits and Systems, ISCAS'97. Part 4 (of 4) - Hong Kong, Hong Kong
Duration: Jun 9 1997Jun 12 1997

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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