PL425587A1 - Random-number generator - Google Patents

Abstract

The random generator (GL) includes two variable rate ring generators (GPRS and GPRS '), a phase detector (DF), a control circuit (US') and seven metastability circuits (UM1, UM2, UM3, UM4, UM5, UM6, UM7) . Variable rate ring generators (GPRS and GPRS ') contain delay lines (LO, LO') closed in loops. Delay lines are composed of delay elements (EO) connected in series connected between the inputs (i-LO, i-LO ') and the outputs (o-LO, o-LO') of these lines, and the line outputs are also connected to the outputs ( o-GPRS, o-GPRS ') of rate-controlled ring generators to which the inputs (i1-DF, i2-DF) of the phase detector (DF) are connected. The output (o-DF) of the phase detector is connected to the main input (i-US ') of the control system (US'), whose output (o-US ') is connected to the control inputs (s-GPRS, s-GPRS') of the generators with adjustable speed. The capacitors (C) with ground (GND) are connected to the delay lines (LO, LO ') by means of keys (K, K'), the control inputs of which are connected to the control inputs (s-GPRS, s-GPRS ') of the generators with adjustable speed, both keys working in anti-parallel. The outputs (o-UM1, o-UM2, o-UM3, o-UM4, o-UM5, o-UM6, o-UM7) of the metastability circuits are connected to the outputs (o1-GL, o2-GL, o3-GL, o4 -GL, o5-GL, o6-GL, o7-GL) of the random generator (GL), the output (o-UM1) of the first being also connected to an additional input (r-US ') of the control circuit (US'). Inputs (i1-UM1, i2-UM1, i1-UM2, i2-UM2, i1-UM3, i2-UM3, i1-UM4, i2-UM4, i1-UM5, i2-UM5, i1-UM6, i2-UM6, i1-UM7, i2-UM7) of the metastable circuits are connected to the delay lines (LO, LO ') to the outputs of the selected delay elements (EO).