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There is a growing concern about timing errors resulting from design marginalities and the effects of circuit aging on speed-paths in logic circuits. This paper presents a low overhead solution for masking timing errors on speed-paths in logic circuits. Error masking at the outputs of a logic circuit is achieved by synthesis of a non-intrusive error-masking circuit that has at least 20% timing slack...
Timing-error detection and recovery circuits are implemented in a 65 nm resilient circuit test-chip to eliminate the clock frequency guardband from dynamic supply voltage (VCC) and temperature variations as well as to exploit path-activation probabilities for maximizing throughput. Two error-detection sequential (EDS) circuits are introduced to preserve the timing-error detection capability of previous...
A high bandwidth critical path monitor (1 sample/ cycle at 4-5 GHz) capable of providing real-time timing margin information to a variable voltage/frequency scaling control loop is described. The critical path monitor tracks the critical path delay to within 1 FO2 inverter delay with a standard deviation less than 3 FO2 delays over process, voltage, temperature, and workload. The CPM is sensitive...
We propose a self-adjusting pipeline structure to enhance chip performance and robustness considering the effects of process variations. We achieve this by introducing delay sensors to monitor internal timing violations within a pipeline stage and variable clock skew buffers to adjust the timing of the pipeline stage based on the feedback from the delay sensors. Furthermore, we formulate the delay...
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