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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.
Non-latch-up IGBT operation was ensured, for the first time, for the entire device operation range. [22] In this sense, the non-latch-up IGBT proposed by Hans W. Becke and Carl F. Wheatley was realized by A. Nakagawa et al. in 1984. Products of non-latch-up IGBTs were first commercialized by Toshiba in 1985. This was the real birth of the ...
Depletion-load processes replace this transistor with a depletion-mode NMOS at a constant gate bias, with the gate tied directly to the source. This alternative type of transistor acts as a current source until the output approaches 1, then acts as a resistor. The result is a faster 0 to 1 transition.
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.
Current mode logic (CML), or source-coupled logic (SCL), is a digital design style used both for logic gates and for board-level digital signaling of digital data.. The basic principle of CML is that current from a constant current generator is steered between two alternate paths depending on whether a logic zero or logic one is being represented.
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.
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Output: The output of the latch is followed by an output stage with push–pull output drivers that can supply up to 200 mA for bipolar timers, lower for CMOS timers. Discharge: Also, the output of the latch controls a transistor acting as an electronic switch that connects DISCHARGE to ground.
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