A Photomultiplier and Amplifier Circuit for Kinetic Spectrophotometry

Abstract
The circuit was developed for routine use in kinetic spectrophotometry. It has a 10–90% risetime of less than 100 nsec and can be used to measure transient changes of light intensity of less than 0.1%. The photomultiplier circuit is linear over a wide range of light intensities and the amplifier can drive a 75 Ω signal cable. Variable integration and differentiation time constants and overload protection are provided.

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