MULTIPLEX FIFO NMR FETCHER

摘要

Synchronous apparatus capable of a variety of operational states responds to a sequence of digital control words, each specifying a desired state and persistence time of the state. The control words are funished to the apparatus from a self-clocked FIFO (60) in accord with the persistence code (84). A selected sub-sequence of digital control words in ROM (70) is placed in an auxiliary FIFO (72) upon detection of a corresponding token (86) in the main sequence and control is passed to the auxiliary FIFO (72) to furnish the subsequence to the apparatus. At the conclusion of the subsequence control is returned to the main FIFO (60) and the main sequence is resumed.