ABSTRACT
We describe a 6 × 6 array of electrically addressed field-effect-transistor self-electro-optic-effect-device differential modulators in which each element has a single-stage amplifier to permit an input voltage of less than 1 V to control the output modulators, which can operate at as high as 10 V. The variations in the switching voltages across the array are less than ±70 mV, and the individual array elements are operated at as high as 2 Gbits/s. We also measure cross talk between adjacent elements within the array, measure the dependence of the switching time on the input voltage swing, and calculate the dependence of the switching time that is due to the photocurrent of the modulators.
ABSTRACT
Two cases of contrast radiography of Wirsung's canal performed by direct percutaneous puncture of the canal under ultrasonic control are reported. The exploration was well tolerated by the patients. This method appears to be of considerable interest in liver and pancreas diseases, being reliable and providing valuable information.
