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公开(公告)号：US20240201954A1
公开(公告)日：2024-06-20
申请号：US18534624
申请日：2023-12-09
IPC分类号： G06F7/58
CPC分类号： G06F7/588
摘要： The present description concerns a device (1) comprising: a first oscillator (RO1) and a second oscillator (RO2) identical to the first one; a flip-flop (FF) delivering an output signal (S3) corresponding to a sampling of an output (S1) of the first oscillator (RO1) at a frequency of the second oscillator (RO2); a counter (COUNTER) supplying a value (N) equal to a number of periods of the second oscillator (RO2) counted during each period of the output signal (S3) of the flip-flop (FF); a first circuit (FB CTRL) modifying a period of one of the oscillators (RO1, RO2) based on the values (N) of the counter (COUNTER) so that an average difference between the periods of the oscillators is equal to a target difference; and a second circuit (PROCESS) characterizing an Allan variance on the output (O) of the counter based on said values (N).
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公开(公告)号：US20240128957A1
公开(公告)日：2024-04-18
申请号：US18483251
申请日：2023-10-09
CPC分类号： H03K3/84 , H03K5/134 , H03K2005/00273
摘要： The present description concerns a random number generation circuit (2) of correlated sampling ring oscillator type comprising: two identical ring oscillators (RO1, R02) implemented in CMOS-on-FDSOI technology; a circuit (104) sampling and storing an output (O1) of one of the two oscillators (RO1) at a frequency of the other one of the two oscillators (R02) and delivering a corresponding binary signal (Beat); and a circuit (200) controlling back gates of PMOS and NMOS transistors of at least one delay element of at least one of the two oscillators (RO1, R02) based on a period difference between the two oscillators (RO1, R02).
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