VLSI Phase Locking Architectures for Feature Linking in Multiple Target Tracking Systems

Part of Advances in Neural Information Processing Systems 6 (NIPS 1993)

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Andreas Andreou, Thomas Edwards


Recent physiological research has shown that synchronization of oscillatory responses in striate cortex may code for relationships between visual features of objects. A VLSI circuit has been de(cid:173) signed to provide rapid phase-locking synchronization of multiple oscillators to allow for further exploration of this neural mechanism. By exploiting the intrinsic random transistor mismatch of devices operated in subthreshold, large groups of phase-locked oscillators can be readily partitioned into smaller phase-locked groups. A mUltiple target tracker for binary images is described utilizing this phase-locking architecture. A VLSI chip has been fabricated and tested to verify the architecture. The chip employs Pulse Ampli(cid:173) tude Modulation (PAM) to encode the output at the periphery of the system.