FIELD: measurement equipment.
SUBSTANCE: invention may be used in devices, in which it is necessary to convert signal short time intervals into a digital code, in the range of durations from several units of nanoseconds to several hundreds of nanoseconds, with discrecity of conversion of less than one nanosecond, for instance, in radar and radio navigation systems, laser range-finding. The method to increase efficiency of recirculation-vernier programming and computing suites is based on recirculation of initial calibrated start and stop pulses, which represent the start and end of the converted time interval, in their appropriate start and stop recirculators and counting number of recirculation of a stop pulse ncn in the first and ncn* in the second versions from the time of its input into the stop recirculator and before the time of matching of recirculating start and stop pulses, and periods of recirculation Tcm and Tcn accordingly of start and stop pulses are selected based on the condition Tcm=Tcn in the first and Tct-Tcn= mτ in the second versions, each of recirculating start pulses is exposed to m-channel calibrated time delay with discrecity of delay between channels equal to discrecity of conversion τ, produced as expanded by the value of the calibrated duration mτ of the start pulse and simultaneously carries out m-channel fixation of matches of recirculating and expanded in each of recirculation by the value of calibrated duration mτ of start pulses with a recirculating stop pulse, they define the number η (area of change η∈[1; m]) of the first of fixed matches and perform arithmetic-logcal calculation of the digital result of conversion N=ncn×m+η+ρ in the first and N=2n*cn×m+η+ρ in the second versions, where ρ - digital value of duration of the initial duration-calibrated start pulse, is defined in the process of tuning.
EFFECT: improved efficiency of conversion.
2 dwg
