Data Generator Having Stable Duration From Trigger Arrival to Data Output Start

A data generator has stable duration from trigger arrival to substantial data output start. A memory provides parallel data according to a divided clock. An address counter provides the same address to the memory until a trigger signal arrives and starts increasing the address after the trigger signal. A hexadecimal counter counts a clock that is faster than the divided clock as the counted number circulates every one period of the divided clock . A trigger information latch latches the counted number of the counter when the trigger signal arrives and provides it to a MUX. The MUX selects data in a pair of the parallel data provided at first and second inputs I1 and I2 to produce rearranged parallel data bits according to the latched counted number. A parallel to serial converter receives the rearranged parallel data to convert it to serial data according to the clock.