A useful nano-power circuit is presented for edge detection in integrated vision systems. Based on a compact front-end of only five MOS devices, this circuit features a tuneable threshold and discrete output; ideal for interfacing to digital electronics.
This paper presents a novel CMOS-based lab-on-chip platform for non-contact magnetic stimulation and recording of neural tissue. The proposed system is the first of its kind to integrate magnetic-stimulation and opto-chemical sensing in a single pixel, tesselated to form an 8 × 8 array. Fabricated in a commercially-available 0.35 ¿m CMOS technology, the… (More)
This letter introduces an ISFET-based integrate and fire neuron forming the front-end of a chemical pixel sensor. With the sense data being encoded in the spike domain, i.e. asynchronous/continuous time and discrete value, it is directly compatible with asynchronous communication hardware, e.g. Address Event Representation. The circuit is shown to be… (More)
In this work we present an adaptive spike generator circuit for intelligent vision chips. We have developed pulse frequency modulation spike encoder which is capable of providing very high dynamic ranges with power consumption similar to animal retina. Our circuit is inspired by the ON-OFF opponency algorithm used by the human eye.