title: A self-powered 2-dimensional motion detection chip.
abstract: We demonstrate a self-powered chip to detect motion which enables constant, non-invasive monitoring. The chip was implemented in a standard 0.18 μm CMOS process. A P-N junction photodiode array was fabricated in the chip to detect when light is blocked by the movement of a hand or finger. The interface circuit detects the change between the shadowing and the exposure to determine the specific movement. This entire chip operates without any off-chip power supply and provides digitized outputs including 1 bit direction output and an 8 bits output indicative of the velocity in two dimensions.
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Lu
authors.forename: Kwanlung
authors.initials: K
authors.lastname: Cheung
authors.forename: Tao
authors.initials: T
authors.lastname: Luo
authors.forename: Hongjiang
authors.initials: H
authors.lastname: Song
authors.forename: Jennifer
authors.initials: J
authors.lastname: Blain Christen
mesh_terms: D011211:Electric Power Supplies; D006801:Humans; D008838:Microcomputers; D008991:Monitoring, Physiologic / Q000295:instrumentation; D009068:Movement