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A depletion-load NMOS NAND gate. In integrated circuits, depletion-load NMOS is a form of digital logic family that uses only a single power supply voltage, unlike earlier NMOS (n-type metal-oxide semiconductor) logic families that needed more than one different power supply voltage.
Logic families built in older processes that did not support depletion-mode transistors were retrospectively referred to as enhancement-load logic, or as saturated-load logic, since the enhancement-mode transistors were typically connected with gate to the V DD supply and operated in the saturation region (sometimes the gates are biased to a ...
Using a resistor of lower value will speed up the process but also increases static power dissipation. However, a better (and the most common) way to make the gates faster is to use depletion-mode transistors instead of enhancement-mode transistors as loads. This is called depletion-load NMOS logic.
In the depletion-load NMOS logic realization in the middle below, the switches are the transistors T2 and T3, and the transistor T1 fulfills the function of the pull-up resistor. In the CMOS realization on the right below, the switches are the n-type transistors T3 and T4, and the pull-up resistor is made up of the p-type transistors T1 and T2 ...
JFETs are sometimes referred to as depletion-mode devices, as they rely on the principle of a depletion region, which is devoid of majority charge carriers. The depletion region has to be closed to enable current to flow. JFETs can have an n-type or p-type channel. In the n-type, if the voltage applied to the gate is negative with respect to ...
I've found non who mentions HMOS, but always NMOS-logic with depletion load. One was written in english. Maybe you can find this in your library. Something I've recognized is that Intel_8080 had NMOS mit enhancement load and 6 µm size the orginal Intel_8086 was build using NMOS with depletion load and 3 µm size (compare HMOS I). So intel ...
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In NMOS logic, the lower half of the CMOS circuit is used in combination with a load device or pull-up transistor (typically a depletion load or a dynamic load). AOI gates are similarly efficient in transistor–transistor logic (TTL). Examples. CMOS 4000-series logic family: CD4085B = dual 2-2 AOI gate [4] CD4086B = single expandable 2-2-2-2 ...