Analog VLSI circuit implementation. of an adaptive neuromorphic olfaction chip

作者：Koickal Thomas Jacob^*; Hamilton Alister; Tan Su Lim; Covington James A; Gardner Julian W; Pearce Tim C

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2007, 54(1): 60-73.

DOI：10.1109/TCSI.2006.888677

• analog VLSI
• electronic nose
• machine olfaction
• neuromorphic circuits
• on-chip learning
• spike-timing-dependent plasticity (STDP)

In this paper, we present the analog circuit design and implementation of the components of an adaptive neuromorphic olfaction chip. A chemical sensor array employing carbon black composite sensing materials with integrated signal processing circuitry forms the front end of the chip. The sensor signal processing circuitry includes a dc offset cancellation circuit to ameliorate loss of measurement range associated with chemical sensors. Drawing inspiration from biological olfactory systems, the analog circuits used to process signals from the on-chip odor sensors make use of temporal "spiking" signals to act as carriers of odor information. An on-chip spike time dependent learning circuit is integrated to dynamically adapt weights for odor detection and classification. All the component subsystems implemented on chip have been successfully tested in silicon.

• 出版日期2007-1