Open AccessLocking of RO due to RF interference in supply
Author(s) -
Xiao Zhiyu,
Chen Dihu,
Su Tao
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.7798
Subject(s) - lock (firearm) , injection locking , ring oscillator , interference (communication) , transistor , electronic engineering , signal (programming language) , phase locking , electrical engineering , materials science , optoelectronics , engineering , computer science , physics , optics , voltage , cmos , diode , laser , mechanical engineering , channel (broadcasting) , programming language
An unusual behaviour of a ring oscillator (RO) is described, namely the RF interference in the supply can lock the operational frequency of the RO. The lock is not an oscillator‐level lock, but a gate‐level lock. Transistor‐level simulations are performed on various technologies. The locking phenomenon appears in all simulated cases and follows certain rules. Moreover, the model is also verified with an RO test board. In contrast to traditional injection locking, where the injection is applied to the signal pin of the oscillator, the locking behaviour introduced is caused by the injection in the supply. To the best of knowledge, this type of locking phenomenon has been reported and demonstrated for the first time.