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Digital circuit monitoring device

A technology of equipment and circuits, applied in the field of electronic circuits, can solve problems such as circuit failures

Pending Publication Date: 2021-09-07
STMICROELECTRONICS SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when the propagation time of a signal in one of the combined paths of a circuit (usually the critical path) increases, the propagation time can exceed a predetermined duration minus a time margin, which leads to failure of the circuit

Method used

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  • Digital circuit monitoring device
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Examples

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Embodiment Construction

[0037] In the various figures, similar features are designated by similar reference numerals. In particular, identical structural and / or functional features may have the same reference numerals and may be arranged with the same structural, dimensional and material properties in various embodiments.

[0038] For the sake of clarity, only steps and elements that are helpful in understanding the embodiments described herein have been illustrated and described in detail. In particular, the known use of the information conveyed by the monitoring device relating to the travel time of the logic element, which conveys information compatible with such known use, and in particular the use of the information that can be implemented based on this information, is not specified in detail. known compensation to avoid failure of the monitored digital equipment. Furthermore, known digital circuits that can be monitored by monitoring devices that are compatible with such known digital circuits...

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PUM

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Abstract

The embodiment of the disclosure relates to a digital circuit monitoring device. A ring oscillator includes a chain of logic components. A storage element is associated with each logic component and configured to store a state of an output of the logic component to which the storage element is associated. A first circuit counts state transitions of an output of a given logic component of the chain. A second circuit synchronizes each storage with a clock signal. A third circuit determines a number of logic components crossed by a state transition between two edges of the clock signal. This determination is made based on the counted number of state transitions and on the stored states of the outputs.

Description

[0001] priority claim [0002] This application claims the benefit of priority from French Patent Application No. 2002212, filed on March 5, 2020, the contents of which are hereby incorporated by reference in their entirety to the fullest extent permitted by law. technical field [0003] The present disclosure relates generally to electronic circuits, and more particularly to integrated electronic circuits. The present disclosure more particularly relates to a digital circuit monitoring device. Background technique [0004] Known digital or sequential circuits include memory devices or sequential elements, typically synchronous flip-flops that are synchronized to a clock signal. Such digital circuits also include combinatorial paths formed by multiple logical or combinatorial components, ie, components that do not have a memory function. Each combinatorial path couples the output of one flip-flop to the input of another flip-flop. The clock signal controls the timing or ...

Claims

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Application Information

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IPC IPC(8): G01R31/317
CPCG01R31/31702G01R31/31725G01R31/31726G11C29/023G11C29/028G11C2029/0409G11C7/222G01R31/3016G01R31/3177H03K3/0315
Inventor R·戈梅兹·戈梅兹S·克勒克
Owner STMICROELECTRONICS SRL