Method of instantaneous signal synchronization of measuring pulse generators

Abstract

The synchronization methods used in the pulse generators of the G5 measuring group in the external trigger mode are analyzed. The factors determining the error in the formation of time intervals in this mode have been studied. It is shown that the main source of errors in the formation of time intervals during external triggering of measuring pulse generators is the variation in the position of the clock generator reference pulses relative to the external trigger pulses. An analytical review of synchronization methods based on the sampling of time intervals by a multi-tap delay line as a pulse signal propagates along it is carried out. The method of instantaneous synchronization of output pulses is proposed, using sampling of the period of the reference pulses of the clock generator with a multi-tap delay line and fixing the position of the edge of the external trigger pulse within the period of the reference frequency by triggers that control the multiplexer, which connects the output of the multi-tap delay line to the output of the device, at which the edge of the next reference clock pulse generator lags by a minimum time from the front of the external trigger pulse. A device is presented that makes it possible to implement the proposed solution. The simulation of the device was carried out, illustrating the details of its functioning. Jitter was assessed on a prototype device using an integrated 5-tap delay line with a total delay of 20 ns. The method can be applied in measuring pulse generators and belongs to the field of pulse technology.