INPUT_NOISE_TEST_CIRCUIT

Published:2009/7/2 3:20:00 Author:May | From:SeekIC

Used for mealsuring noise immunity of emitter-coupled logic to transient signal on input line. Supply voltages used permit terminating logic outputs to ground through 50-ohm CRO probe. Accurate bias provided by power supply is used to set input logic levels. 450-ohm resistor is used in series with 50-ohm input of CRO to isolate input; this gives 10:1 amplitude attenuation while still providing accurate picture of input noise.-B. Blood. AC Noise Immunity of MECL 10.000 lntegrated Circuits. Motorola, Phoenix. AZ. 1972, AN-592.



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