Graduate Thesis Or Dissertation
 

Design of an asynchronous third-order finite impulse response filter

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/dn39x430g

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  • With the increased demand for complex digital signal processing systems, real-time signal processing requires higher throughput systems. In the past, the throughput has been increased by increasing the clock rates, but synchronization can become increasingly more difficult. Recently there has been renewed interest in designing asynchronous digital systems. In an asynchronous system, there is no global clock, and all modules communicate through handshaking. In this thesis we demonstrate an implementation of an FIR filter using asynchronous digital circuit techniques. These asynchronous design techniques are used to test whether a practical signal processing filter can be implemented with asynchronous logic. A third-order four-bit filter is developed and simulated with SPICE, comparing favorably with other available technologies in speed and power consumption. Although in practice 8-16 bits are needed, this work is sufficient to demonstrate the feasibility of asynchronous circuits for filtering applications. A chip is laid out in 2 micron CMOS, and testing shows that it has a speed-power product comparable with asynchronous designs fabricated by others.
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