Abstract
A simple scope calibrator for voltage and time calibration is described. A square pulse of calibrated amplitude and pulse-width can be triggered in synchrony with CRO seeep, and displayed, with an adjustable delay, simultaneously with biological signals on CRO screen. The output of the device is isolated from ground and has a low output impedance (less than 50 Ω for most ranges). Both the amplitude (10 μV−1V) and pulse-width (0.2–1000 ms) of the outputs cover wide ranges in 1–2–5 steps with an accuracy of less than ±1%. The output drifts against changes in power supply and temperature are negligibly small. The circuit is designed to give the high performance at reasonably low cost, and to be built with only the components readily available in the market.
Similar content being viewed by others
References
Frank, K., Becker, M. C.: Microelectrodes for recording and stimulation. In: Physical techniques in biological research, Vol. V., (W. L. Nastuk, ed.), pp. 22–87. New York: Academic Press 1964
Monsanto, MCT2F, opto-isolator: Data sheet, Monsanto, 1972.
Obara, S.: A triggered IC calibrator for use in electrophysiological experiments. J. Physiol. Soc. Japan,36, 17–18 (1974)
Signetis, 555-timer: Data sheet and applications information, Signetics, 1972
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Obara, S. A low-cost, high-precision scope calibrator. Pflugers Arch. 378, 259–262 (1979). https://doi.org/10.1007/BF00592744
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00592744