Two Single Flux Quantum (SFQ) Logic elements have been designed, fabricated, and successfully tested: eight bit Analog to Digital Converter (ADC) and Non Destructive readout (NDRO) cells. Converter consists of input coil, comparator and reversible ripple counter. Two types of the input coils deferring by inductance and two types of the NDRO units also have been investigated: with direct and magnetic coupling between interferometers. The integrated circuits are fabricated using 4 gm Nb-AlOx-Nb trilayer technology with critical current density about 1000 A/cm. This technique allows to produce NDRO cells working up to 10 GHz frequency.