Interfaces between RSFQ circuits in the Returnto-Zero (RZ) and semiconductor circuits in the Non-Return-toZero (NRZ) mode are developed for data transmission at about 10 GHz clock frequencies reducing the errors owing to a finite sampling jitter of conventional room temperature equipment. A prototype of a NFU output interface with the Nb-AI203-Nb technology has been simulated, implemented and successfully tested until now at 100 MHz. The interface can easily be combined with a superconducting pulse amplifier for NFU output signals in the range of several mV. Corresponding simulations and a layout of the amplifier are presented.

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