Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1976-10-01
1978-08-08
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
330 86, 356 85, G01R 1508, H03F 136, G01J 330
Patent
active
041059670
ABSTRACT:
The automatic range selection circuit is particularly useful with a photomultiplier tube linear microphotometer and includes an amplifier, adjustable and switchable impedances coupled between an input and an output of the amplifier for adjusting the gain thereof, two comparators for comparing the output from the amplifier with upper and lower reference voltage levels, an integrator for integrating the output of the comparators, and an analog control circuit responsive to the output signal level at the output of the integrator for controlling the amount of impedance coupled between the input and output of the amplifier thereby to automatically adjust the gain thereof.
REFERENCES:
patent: 3187323 (1965-06-01), Flood et al.
patent: 3758858 (1973-09-01), McCue
Baxter Travenol Laboratories Inc.
Collins Henry W.
Karlsen Ernest F.
Kinney Richard G.
Rolinec Rudolph V.
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