A monolithic light-to-frequency converter with a scalable sensor array

Author

Aswell, C.J. ; Berlien, J. ; Dierschke, E. ; Hassan, M.

Author_Institution

Texas Instrum. Inc., Dallas, TX, USA

fYear

1994

fDate

16-18 Feb. 1994

Firstpage

158

Lastpage

159

Abstract

A single-chip CMOS light to frequency converter provides light intensity measurements with an absolute accuracy of 5% and a selectable full scale sensitivity of either 1, 10 or 100 mW/ cm/sup 2/. The device incorporates a new switched-capacitor charge-metering current-to-frequency converter with an integral bandgap reference and exhibits a measured linearity error of 0.2% for a full scale frequency of 0.5 MHz and 1% for 1 MHz. A pin-programmable divider is included on the chip so that the output can be scaled for applications that require a lower frequency. An output enable is provided so that multiple units may share the same controller input line.<>

Keywords

CMOS integrated circuits; frequency convertors; intensity measurement; measurement errors; optical frequency conversion; optical sensors; photodiodes; sensitivity; 0.5 MHz; 1 MHz; absolute accuracy; controller input line; full scale frequency; integral bandgap reference; light intensity measurements; lower frequency; measured linearity error; monolithic light-to-frequency converter; multiple units; output enable; photodiode array; pin-programmable divider; scalable sensor array; selectable full scale sensitivity; single-chip CMOS light to frequency converter; switched-capacitor charge-metering current-to-frequency converter; Capacitors; Circuits; Diodes; Frequency conversion; Optical arrays; Oscillators; Photodiodes; Sensor arrays; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1994. Digest of Technical Papers. 41st ISSCC., 1994 IEEE International

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-1844-7

Type

conf

DOI

10.1109/ISSCC.1994.344688

Filename

344688