Sub threshold, Electrical Engineering

Sub Threshold

The sub threshold I-V curve depends exponentially on the threshold voltage, introducing a strong reliance on any manufacturing variation that influences threshold voltage; for instance: differences in oxide thickness, junction depth/body doping which change the degree of drain-induced barrier lowering. The resultant sensitivity to fabricational variations complicates optimization for leakage and performance.

1618_sub threshold 1.png

Figure: MOSFET drain current vs. drain-to-source voltage for various values of VGS - Vth; the boundary in between linear (Ohmic) and saturation (active) modes is pointed out by the upward curving parabola.

 

2100_sub threshold 2.png

Figure: Cross section of a MOSFET that is operating in the linear (Ohmic) region; strong inversion region exist even near drain

 

939_sub threshold 3.png

Figure: Cross section of a MOSFET operating in the saturation (active) region; channel shows pinch-off near drain

Posted Date: 1/11/2013 1:25:35 AM | Location : United States







Related Discussions:- Sub threshold, Assignment Help, Ask Question on Sub threshold, Get Answer, Expert's Help, Sub threshold Discussions

Write discussion on Sub threshold
Your posts are moderated
Related Questions
READY Input Microprocessor  has to communicate with other  peripherals which  are slow  as compared to the microprocessor. READY  signals  is used to synchronies  these periphe


Q A point charge Q 1 =-5 nC is located at (6, 0, 0). Compute the voltage v ba between two points a(1, 0, 0) and b(5, 0, 0). Comment on whether point a is at a higher potential wi

Forward and Reverse-active in Bipolar Junction Transistor: Forward-active (or simply, active): The base-collector junction is reverse biased and base-emitter junction is

With the help of neat sketch T-S diagram illustrate the working of simple air evaporative cooling system used in air craft. With the help of neat diagram and T-S diagram iillust

Q. With suitable example differentiate between accuracy and precision.  Sol. Accuracy :  Accuracy is the closeness with which instrument reading approaches the true value of

What are operations performed on data in 8085 The various operations performed are Store 8-bit data Perform arithmetic and logical operations Test for conditio

Q. What is the requirement of a hybrid in telephone networks? How does it work? Ans: Digital exchanges require receive and transmit signals on separate two-wire circuits. Th

Explain with proper diagram all the six modes of operation of programmable interval timer 8254. Mode 0: The output in mode 0 is initially low, and will stay low for the perio

Q. Draw and explain the circuit of Wein bridge oscillator. Obtain the expressions for the (i) frequency of oscillation and (ii) condition for oscillation. Will oscillat