A. Nakada et al., Fully-parallel VLSI implementation of vector quantization processor using neuron-MOS technology, IEICE TR EL, E82C(9), 1999, pp. 1730-1738
An analog vector quantization processor has been designed based on the neur
on-MOS (vMOS) technology. In order to achieve a high integrating density, t
emplate information is merged into the matching cell (the absolute value ci
rcuitry) using the vMOS ROM. technology. A new-architecture vMOS winner-tak
e-all (WTA) circuit is employed for fully-parallel search for the minimum-d
istance vector. The WTA performs multi-resolution winner search with an aut
omatic feedback gain control. A test chip having 256 16-element fixed templ
ate vectors has been built in a 1.5-mu m double-polysilicon CMOS technology
with the chip size of 7.2 mm x 7.2 mm, and the basic operation of the circ
uits has been demonstrated.