Abstract: A magnetic bubble domain swap gate circuit (28) for use with a magnetic bubble element having an information transmission line along which magnetic bubble domains are transferred and an information storage loop in which magnetic bubble domains are stored, wherein a magnetic bubble domain in the information transmission line can be transmitted to the information storage loop and a magnetic bubble domain in the information storage loop can be simultaneously transmitted to the information transmission line. The repetition period of the magnetic substance patterns which form the information transmission line, is greater than the period of the magnetic substance patterns forming the information storage loop.

Abstract: A timing pulse generator for producing timing pulses the period of which is variable. In the timing pulse generator, a plurality of reference pulse trains are produced which have the same frequency as each other, but different phases from each other. Then, each of the pulses comprising the final timing pulses to be produced is created by suitably selecting one of the pulses from among the reference pulse trains, sequentially.