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Latch-up is the low resistance connection between tub [clarification needed] and power supply rails. Also to avoid the latch, a separate tap connection is put for each transistor. But this will increase the size of the device so fabs give a minimum space to put a tap, for example, 10 μm in 130 nm technology.
Q = 1 (1, 0) – referred to as an S (dominated)-latch; Q = 0 (0, 1) – referred to as an R (dominated)-latch; This is done in nearly every programmable logic controller. Hold state (0, 0) – referred to as an E-latch; Alternatively, the restricted combination can be made to toggle the output. The result is the JK latch.
Most manufacturers design to prevent latch-up and test their products to ensure that latch-up does not occur from atmospheric particle strikes. In order to prevent latch-up in space, epitaxial substrates, silicon on insulator (SOI) or silicon on sapphire (SOS) are often used to further reduce or eliminate the susceptibility.
It can be flipped from one state to the other by an external trigger pulse. This circuit is also known as a flip-flop or latch. It can store one bit of information, and is widely used in digital logic and computer memory. Multivibrators find applications in a variety of systems where square waves or timed intervals are required.
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A related term is latching current, which is the minimum additional current that can make up for any missing input (gate) current in order to keep the device 'ON', in other words, to keep the device's internal structure latched. [3]
Since then, her efforts to make sense of the inexplicable tragedy have collided with a teeming online world of conspiracy theories all too eager to latch onto grief and uncertainty.
A simple example of metastability can be found in an SR NOR latch, when both Set and Reset inputs are true (R=1 and S=1) and then both transition to false (R=0 and S=0) at about the same time. Both outputs Q and Q are initially held at 0 by the simultaneous Set and Reset inputs.