Download e-book for iPad: A Designer s Guide to Built-in Self-Test by Charles E. Stroud

By Charles E. Stroud

ISBN-10: 1402070500

ISBN-13: 9781402070501

A up to date technological boost is the paintings of designing circuits to check themselves, often called a integrated Self-Test (BIST). This suggestion used to be first proposed round 1980 and has grown to develop into one of many most crucial trying out ideas on the present time, in addition to for the longer term. This booklet is written from a designer's point of view and describes the foremost BIST techniques which have been proposed and carried out on the grounds that 1980, in addition to their benefits and barriers. The BIST techniques contain the integrated good judgment Block Observer, pseudo-exhaustive BIST options, round BIST, scan-based BIST, BIST for normal constructions, BIST for FPGAs and CPLDs, mixed-signal BIST, and the mixing of BIST with concurrent fault detection innovations for online checking out. specific cognizance is paid to system-level use of BIST as a way to maximize some great benefits of BIST via lowered trying out time and value in addition to excessive diagnostic solution. the writer spent 15 years as a dressmaker at Bell Labs the place he designed over 20 construction VLSI units and three construction circuit forums. 16 of the VLSI units contained BIST of assorted varieties for normal buildings and basic sequential common sense, together with the first BIST for Random entry thoughts (RAMs), the 1st thoroughly self-testing built-in circuit, and the 1st BIST for mixed-signal platforms at Bell Labs. He has spent the earlier 10 years in academia the place his examine and improvement keeps to target BIST, together with the first BIST for FPGAs and CPLDs in addition to endured paintings within the region of BIST for common sequential good judgment and mixed-signal structures. He holds 10 US patents (with five extra pending) for numerous different types of BIST methods. consequently, the writer brings a special combination of data and event to this functional advisor for designers, try out engineers, product engineers, process diagnosticians, and bosses.

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Extra info for A Designer s Guide to Built-in Self-Test

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Therefore, both the stuck-at-0 and stuck-at-1 faults at a fan-out stem must be included in the fault list (similar to a primary output). 7b, faults can continue to be collapsed in the absence of fan-out stems resulting in only two faults (the output stuck-at-0 and stuck-at-1) included in the collapsed fault list. 7. The total number of gate-level faults in an uncollapsed fault list is 2N where N is the total number of gate inputs and gate outputs in the CUT. The total number of gatelevel faults in the collapsed fault list, is given by: where is the total number of gate inputs to all the gates in the circuit, is the number of primary outputs, is the number of fan-out stems, and is the number of inverters (and/or buffers) in the circuit.

The same analysis holds true for the transistor-level stuck fault model where each of the N transistors in a device can be either stuck-on or stuck-off. This is also true for N bridging fault sites when we consider the wired-AND/OR or dominant bridging fault models since there are two possible faults for each fault site. For the dominant-AND/OR bridging fault model, there are four possible faults to consider for each of the N fault sites, such that the multiple fault model would result in faulty circuits to emulate while the single fault model would require emulation of only 4N faulty circuits.

1 Gate-Level Stuck-At Fault Model The gate-level stuck-at fault model allows the gate inputs and outputs to be either stuck-at-0 (sa0) or stuck-at-1 (sal) [330]. 2. 2. 2. 3 for an AND gate, OR gate, and inverter for all possible input patterns. Note that for each possible fault site (each input and the output of the gate) there are two possible faults that can occur, stuck-at-0 and stuck-at-1. The behavior of the gate with these faults is given in the table associated with each gate; note that this faulty behavior table assumes that only one fault is present in the gate.

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A Designer s Guide to Built-in Self-Test by Charles E. Stroud

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