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Health and usage monitoring as a technique for online test, diagnosis or prognosis of structures and systems has evolved as a key technology for future critical systems. The technology, often referred to as HUMS is usually based around sensors that must be more reliable than the system or structure they are monitoring. This paper proposes a fault tolerant sensor architecture and demonstrates the feasibility...
A circuit for on-chip measurement of long-term jitter, period jitter, and clock skew, is demonstrated. The circuit uses a single latch and a voltage-controlled delay element, and is evaluated in a stand-alone pad frame. Excellent reproduction of jitter measured by oscilloscope is shown. Measured jitter resolution is 1 ps or better. The circuit is also incorporated into a 2 GHz clock distribution network...
A circuit for on-chip measurement of period jitter and skew of clock distribution is described. The circuit uses a single latch and a voltage-controlled delay element. The circuit is evaluated in a stand-alone pad frame, where a jitter resolution of about 1 ps is demonstrated, and is incorporated in a 2 GHz clock distribution network to obtain on-chip period jitter and clock skew measurement.
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