776 Sixteen Channel Photomultiplier Preamplifier



The Model 776 provides 16 independent, direct-coupled amplifiers in a single width NIM module. Each channel has a non-inverting voltage gain of 10, operates from DC to 275 MHz and has two 50 ohm outputs. It's designed for use with fast photomultiplier detectors having negative going output pulses.

This amplifier exhibits excellent DC and high frequency stability. Two channels can be cascaded to obtain voltage gains of 100 while maintaining good pulse fidelity without significant overshoot or baseline drift. Each channel has an internal DC offset adjustment allowing for compensation of the DC output due to variations of input source impedance or grounding differences.

The output stage is a low-impedance voltage source design with short-circuit protection. No damage will occur from overloading or continuous shorts to ground. The outputs are designed to drive two 50 ohm loads. However, unused outputs may remain unterminated with no adverse effects.

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