Title :
A photodetector array for a one terabyte optical tape recorder
Author :
Self, Paul ; Miller, Richard ; Brehmer, Kevin ; Bielak, Richard
Author_Institution :
Avasem Corp., San Jose, CA, USA
Abstract :
A 192-channel photodetector array analog/digital IC where each channel contains an integrated photodetector diode, a current-to-voltage amplifier, an optical threshold adjust circuit with differential sample and hole, and a comparator has been fabricated. The measured input referred noise current of the amplifier is less than 0.68 pA/(Hz)1/2 with a signal bandwidth of at least 2.15 MHz and a supply current for one amplifier of only 185 μA. The photodiode responsivity, the noise of the current-to-voltage amplifier, and the accuracy of the threshold adjust circuit with differential sample and hold were found to be better than system requirements
Keywords :
application specific integrated circuits; optical storage; photodetectors; 1 TB; 185 muA; 2.15 MHz; analog/digital IC; comparator; current-to-voltage amplifier; input referred noise current; integrated photodetector diode; optical tape recorder; optical threshold adjust circuit; photodetector array; photodiode responsivity; signal bandwidth; supply current; threshold adjust circuit; Analog integrated circuits; Differential amplifiers; Digital integrated circuits; Optical amplifiers; Optical arrays; Optical noise; Optical recording; Photodetectors; Photonic integrated circuits; Stimulated emission;
Conference_Titel :
Custom Integrated Circuits Conference, 1991., Proceedings of the IEEE 1991
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0015-7
DOI :
10.1109/CICC.1991.163999
