scholarly journals Ruggedizing Printed Circuit Boards Using a Wideband Dynamic Absorber

2003 ◽  
Vol 10 (3) ◽  
pp. 195-210 ◽  
Author(s):  
V.C. Ho ◽  
A.M. Veprik ◽  
V.I. Babitsky
Keyword(s):  
Analytical Study ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Sinusoidal Vibration ◽  
Printed Circuit ◽  
Novel Approach ◽  
Dynamic Absorber ◽  
Commercial Off The Shelf ◽  
Scale Experiment ◽  
Critical Components

The existing approaches to ruggedizing inherently fragile and sensitive critical components of electronic equipment such as printed circuit boards (PCB) for use in hostile industrial and military environment are either insufficient or expensive. This paper addresses a novel approach towards ruggedizing commercial-off-the-shelf PCBs using a miniature wideband dynamic absorber. The optimisation technique used relies on the experimentally measured vibration spectra and complex receptance of the original PCB.The analytical study and full-scale experiment show that an optimised wideband dynamic absorber with the mass of only 15% relative to the total mass of the PCB is quite capable of the essential suppression of all relevant resonant responses of the PCB under shock, wideband random and sinusoidal vibration with variable frequency.

scholarly journals NotchPUF: Printed Circuit Board PUF Based on Microstrip Notch Filter

Cryptography ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 11
Author(s):  
Mitchell Martin ◽  
Jim Plusquellic
Keyword(s):  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Statistical Tests ◽  
Notch Filter ◽  
Circuit Board ◽  
Circuit Boards ◽  
Printed Circuit ◽  
In Series ◽  
Commercial Off The Shelf ◽  
Using Data

Physical Unclonable Functions (PUFs) are primitives that are designed to leverage naturally occurring variations to produce a random bitstring. Current PUF designs are typically implemented in silicon or utilize variations found in commercial off-the-shelf (COTS) parts. Because of this, existing designs are insufficient for the authentication of Printed Circuit Boards (PCBs). In this paper, we propose a novel PUF design that leverages board variations in a manufactured PCB to generate unique and stable IDs for each PCB. In particular, a single copper trace is used as a source of randomness for bitstring generation. The trace connects three notch filter structures in series, each of which is designed to reject specific but separate frequencies. The bitstrings generated using data measured from a set of PCBs are analyzed using statistical tests to illustrate that high levels of uniqueness and randomness are achievable.

A novel approach to recycling of glass fibers from nonmetal materials of waste printed circuit boards

2009 ◽  
Vol 170 (2-3) ◽  
pp. 978-982 ◽  
Author(s):  
Yanhong Zheng ◽  
Zhigang Shen ◽  
Shulin Ma ◽  
Chujiang Cai ◽  
Xiaohu Zhao ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Glass Fibers ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Novel Approach
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