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The process of  reduction of threshold voltage of the transistor at higher drain voltages is called as

Question

The process of  reduction of threshold voltage of the transistor at higher drain voltages is called as

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Solution

The process of reduction of threshold voltage of the transistor at higher drain voltages is called Drain Induced Barrier Lowering (DIBL).

Here are the steps that explain this process:

  1. When a voltage is applied to the drain of a MOSFET, it creates an electric field within the device.

  2. This electric field extends into the channel region and affects the barrier height at the source end.

  3. As the drain voltage increases, the electric field strength also increases. This causes the barrier at the source end to lower.

  4. This lowering of the barrier at the source end due to the influence of drain voltage is known as Drain Induced Barrier Lowering (DIBL).

  5. DIBL effect causes the threshold voltage of the device to reduce with an increase in drain voltage. This is because the lowering of the barrier allows more carriers to be injected from the source into the channel, thus turning on the device at a lower gate voltage.

  6. DIBL is a short-channel effect, which means it becomes more pronounced as the channel length of the MOSFET is reduced. It is a major concern in the design of modern ultra-small devices because it can lead to increased leakage current and power consumption.

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Similar Questions

The voltage VX is the threshold voltage (usually labelled VTh). The threshold voltage increases as the gate voltage increases.The voltage VX is the pinch-off voltage (usually labelled VP). The pinch-off voltage increases as the gate voltage increases.The voltage VX is the cut-off voltage (usually labelled VC). The cut-off voltage increases as the gate voltage increases.The voltage VX is the drain voltage (usually labelled VD). The drain voltage increases as the gate voltage increases.

State the application of a transistor.

When operated in cutoff and saturation, the transistor acts like a(a) Linear amplifier(b) Switch(c) Variable capacitor(d) Variable resistor

Arrange the six figures labelled (A) to (F) in the proper sequential order to show: (1) PN junction depletion region around the drain and source(2) Small positive voltage applied to gate creating a depletion region beneath the gate by pushing away the mobile holes.(3) The gate voltage is at the threshold voltage where the number of mobile electrons and holes beneath the gate are approximately equal.(4) The gate voltage is above the threshold voltage and there are electrons beneath gate forming a "inversion" layer of charge.(5) The drain voltage is increased to the Pinch-off voltage where the reverse-biased depletion region between the n-type drain and p-type substrate increases so that the inversion layer of charge disappears (or is pinched-off) at the drain.(6) The drain voltage is increased beyond the Pinch-off voltage and the effective channel length beneath the gate decreases. (A) (B)(C)  (D) (E) (F)Group of answer choicesB,D,A,F,C,EE,C,F,A,B,DB,D,A,F,E,CD,B,F,A,C,E

Consider a 555-timer IC with a supply voltage (VCC) of 12 V, and determine the value of threshold level voltage.

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