Accurate Throughput Derivation of Pipelined NULL Convention Logic Asynchronous Circuits
نویسندگان
چکیده
A throughput estimation formula for optimally pipelining NULL Convention Logic (NCL) asynchronous circuits was presented in the literature. However, it ignores register delays. This paper presents a precise throughput derivation formula for pipelined NCL circuits. The formula was verified by Spice simulation and can be used for static timing analysis.
منابع مشابه
Designing NULL Convention Combinational Circuits to Fully Utilize Gate-Level Pipelining for Maximum Throughput
Since the NULL Convention Logic (NCL) paradigm is delay-insensitive, NCL combinational circuits cannot be partitioned indiscriminately when pipelining, as can clocked circuits. Instead, these circuits must be partitioned into stages, such that each stage is inputcomplete with respect to all of its inputs and delayinsensitivity is maintained. Therefore the selected architecture for an NCL circui...
متن کاملComparison of NULL Convention Booth2 Multipliers
This paper describes two architectures for designing asynchronous NULL Convention Logic (NCL) Booth2 multipliers. The first is better suited for a non-pipelined implementation, while the second is best for a high throughput pipelined realization. The two architectures are compared in terms of area and speed, using a gate-level NCL VHDL library with gate delays generated from physical level simu...
متن کاملSpeedup of NULL convention digital circuits using NULL cycle reduction
A NULL Cycle Reduction (NCR) technique is developed to increase the throughput of NULL Convention Logic systems, by reducing the time required to flush complete DATA wavefronts, commonly referred to as the NULL cycle. The NCR technique exploits parallelism by partitioning input wavefronts, such that one circuit processes a DATA wavefront, while its duplicate processes a NULL wavefront. A NCR ar...
متن کاملNULL convention multiply and accumulate unit with conditional rounding, scaling, and saturation
Approaches for maximizing throughput of self-timed multiply-accumulate units (MACs) are developed and assessed using the NULL Convention Logic (NCL) paradigm. In this class of self-timed circuits, the functional correctness is independent of any delays in circuit elements, through circuit construction, and independent of any wire delays, through the isochronic fork assumption [1, 2], where wire...
متن کاملGate and Throughput Optimizations for Null Convention Self-timed Digital Circuits
NULL Convention Logic (NCL) provides an asynchronous design methodology employing dual-rail signals, quad-rail signals, or other Mutually Exclusive Assertion Groups (MEAGs) to incorporate data and control information into one mixed path. In NCL, the control is inherently present with each datum, so there is no need for worsecase delay analysis and control path delay matching. This dissertation ...
متن کامل