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http://dx.doi.org/10.17661/jkiiect.2021.14.4.338

Design of Single Power CMOS Beta Ray Sensor Reducing Capacitive Coupling Noise  

Jin, HongZhou (Department of Electronic Engineering, Changwon National University)
Cha, JinSol (Department of Electronic Engineering, Changwon National University)
Hwang, ChangYoon (Department of Smart Manufacturing Engineering, Changwon National University)
Lee, DongHyeon (Department of Smart Manufacturing Engineering, Changwon National University)
Salman, R.M. (Department of Electronic Engineering, Changwon National University)
Park, Kyunghwan (Electronics and Telecommunications Research Institute)
Kim, Jongbum (Korea Atomic Energy Research Institute)
Ha, PanBong (Department of Electronic Engineering, Changwon National University)
Kim, YoungHee (Department of Electronic Engineering, Changwon National University)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.14, no.4, 2021 , pp. 338-347 More about this Journal
Abstract
In this paper, the beta-ray sensor circuit used in the true random number generator was designed using DB HiTek's 0.18㎛ CMOS process. The CSA circuit proposed a circuit having a function of selecting a PMOS feedback resistor and an NMOS feedback resistor, and a function of selecting a feedback capacitor of 50fF and 100fF. And for the pulse shaper circuit, a CR-RC2 pulse shaper circuit using a non-inverting amplifier was used. Since the OPAMP circuit used in this paper uses single power instead of dual power, we proposed a circuit in which the resistor of the CR circuit and one node of the capacitor of the RC circuit are connected to VCOM instead of GND. And since the output signal of the pulse shaper does not increase monotonically, even if the output signal of the comparator circuit generates multiple consecutive pulses, the monostable multivibrator circuit is used to prevent signal distortion. In addition, the CSA input terminal, VIN, and the beta-ray sensor output terminal are placed on the top and bottom of the silicon chip to reduce capacitive coupling noise between PCB traces.
Keywords
beta ray sensor; charge sensitive amplifier; capacitive coupling noise; monostable multivibrator; true random number generator;
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