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A digital circuit with relaxed clocking
Linköpings universitet, Institutionen för systemteknik.
Linköpings universitet, Institutionen för systemteknik. Linköpings universitet, Institutionen för systemteknik, Elektroniksystem.
2004 (engelsk)Inngår i: Proc. Swedish System-on-Chip Conf., SSoCC'04, 2004Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

A clock with adjustable rise and fall time is used in conjunction with a D flip-flop that operates well with this clock. Its intended use is to relax the design of the clock network in digital circuits and to alleviate the problems with simultaneous switching noise in mixed-signal circuits. A test chip has been designed in a 0.35 μm CMOS process. The chip consists of a clock driver with adjustable rise and fall times, and an FIR filter that uses the special D flip-flop in the registers. According to measurements, the digital circuit works well when the rise and fall times of the clock is varied from 0.5 ns to 10 ns. This makes the propagation delay in the critical path to vary between 13.0 ns and 13.7 ns, and the energy dissipation to vary between 1.5 pJ and 1.7 pJ, for an input signal with a transition activity of 0.4.

sted, utgiver, år, opplag, sider
2004.
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URN: urn:nbn:se:liu:diva-22876Lokal ID: 2217OAI: oai:DiVA.org:liu-22876DiVA, id: diva2:243189
Tilgjengelig fra: 2009-10-07 Laget: 2009-10-07 Sist oppdatert: 2009-10-14

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