DocumentCode
883345
Title
I/sup 2/L timing circuit for the 1 ms-10 s range
Author
Müller, Rüdiger
Volume
12
Issue
2
fYear
1977
fDate
4/1/1977 12:00:00 AM
Firstpage
139
Lastpage
143
Abstract
An I/SUP 2/L timing circuit without external components is presented, which makes use of some specific I/SUP 2/L properties-operation at low power levels, light sensitivity, variable delay, and long maximum delay times. The circuit comprises 45 gates on a chip area of 0.3 mm/SUP 2/. It produces pulses from below 1 ms to more than 10 s which are inversely proportional to a single supply current. For this purpose, new methods for current splitting and amplification with I/SUP 2/L circuits are used. The temperature dependence of the output pulse width is better than 0.8 percent/K. If the circuit is irradiated by light, it produces pulses with a pulse width inversely proportional to the light intensity. For example, it can be used as an integrated exposure meter for all kinds of photographic applications.
Keywords
Bipolar integrated circuits; Integrated logic circuits; Timing circuits; bipolar integrated circuits; integrated logic circuits; timing circuits; Current supplies; Feedback circuits; Feedback loop; Grounding; Output feedback; Pulse amplifiers; Pulse circuits; Ring oscillators; Testing; Timing;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.1977.1050862
Filename
1050862
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