A CMOS optical microspectrometer with light-to-frequency converter, bus interfa...

• Author(s): Correia, J. H. ; Graaf, G. de ; Bartek, M. ; Wolffenbuttel, R. F.
• Date: 2001
• Persistent ID: http://hdl.handle.net/1822/3834
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): CMOS optical microspectrometer; Light-to-frequency converter
• Document Type: Article
• Language: English

Description

A single-chip CMOS optical microspectrometer containing an array of 16 addressable Fabry–Perot (F–P) etalons (each one with different resonance cavity length), photodetectors, and circuits for readout, multiplexing, and driving a serial bus interface has been fabricated in a standard 1.6- m CMOS technology (chip area 3 9 4 2 mm2). The result is a chip that can operate using only four external connections (including dd and ss) covering the optical range of 380–500 nm with FWHM = 18 nm. Frequency output and serial bus interface alloweasy multisensor, multichip interfacing using a microcontroller or a personal computer. Also, stray-light compensation techniques are implemented. Power consumption is 1250 W at a clock frequency of 1 MHz.