Quiescent Current Sensing
نویسندگان
چکیده
Quiescent current monitoring was developed as a testing strategy complementary to the traditional voltage test. A current test has the advantage that a test pattern may be easily generated and nearly every single and multiple physical faults are current-testable, on the other hand it is slowlier than a logic test since we have to wait for the transient currents to settle before performing the measurement. With the new submicronic technologies the contribution of the leakage currents to quiescent consumption cannot be neglected anymore, as a consequence current sensing in not applyable to such technologies as a test approach. The major exploitation of quiescent current sensors is for screening purposes, that is for identifying not the faulty chips but the ones that consume more and thus are not suitable for low-power applications. The measurement of the quiescent currents is performed by an analog sensor that may be placed on or oo-chip. Built-in current sensors lead to a faster test but they also complicate and slow down the circuit to be tested. This problems may be avoided using an external sensor, anyway such sensors slow down the test. In this paper we study several possible implementations of built-in and external current sensors for monitoring the quiescent currents in integrated circuit.
منابع مشابه
CAP1214 - Multiple Channel Capacitive Touch Sensor and LED Driver Datasheet - SMSC
Applications Consumer Electronics Desktop and Notebook PCs LCD Monitors Features Fourteen (14) capacitive touch sensor inputs — Compensates for variable sensing pads — Programmable sensitivity — High SNR allows for easy tuning — Automatic recalibration — Slider acceleration and position detection — Proximity detection Lid closure detection Low power operation — 4.5uA quiescent current in Deep S...
متن کاملIDDQ Test Using Built-In Current Sensing of Supply Line Voltage Drop
A practical built-in current sensor (BICS) is described that senses the voltage drop on supply lines caused by quiescent current leakage. This non-invasive procedure avoids any performance degradation. The sensor performs analog-to-digital conversion of the input signal using a stochastic process, with scan chain readout. Self-calibration and digital chopping are used to minimize offset and low...
متن کاملHip Surgery in Quiescent or Active Tubercular Hip Arthritis; Is Reactivation Risk Really a Matter
About 15 % of all musculoskeletal tuberculosis (TB) have hip involvement. Early anti-tubercular drug therapy and other conservative treatment including short-term traction and mobilization programs could prevent hip joint destruction. Reactivation of TB accounts for a significant of active TB incidence, especially in the developed countries with a low TB prevalence. The risk of TB activation ...
متن کاملResilience of bacterial quorum sensing against fluid flow
Quorum sensing (QS) is a population-density dependent chemical process that enables bacteria to communicate based on the production, secretion and sensing of small inducer molecules. While recombinant constructs have been widely used to decipher the molecular details of QS, how those findings translate to natural QS systems has remained an open question. Here, we compare the activation of natur...
متن کامل