A superconductor circuit (50) for providing active timing arbitration between SFQ pulses. The superconductor circuit (50) includes a first superconducting transmission line (52) having at least one inductor (54) for transmitting first input pulses, and a second superconducting transmission line (62) having at least one inductor (64) for transmitting second input pulses that are correlated to the first input pulses. The first and second superconducting transmission lines (52, 62) are coupled together in order to generate a flux attraction between the first and second input pulses for reducing relative timing uncertainty.