Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Phenomenon - Fet operation:
For either improvement- or depletion-mode devices, at drain-to-source voltages very much less than gate-to-source voltages, changing the gate voltage will change the channel resistance, drain current will be proportional to drain voltage (referenced to source voltage). In this type of mode the FET operates such as a variable resistor and the FET is said to be operating in a linear modeor ohmic mode.
If drain-to-source voltage is gets increased, this creates a important asymmetrical change in the shape of the channel because of a gradient of voltage potential from source to drain. The shape of the inversion region turns "pinched-off" near the drain end of the channel. If drain-to-source voltage is raised further, the pinch-off point of the channel starts to move away from the drain in the direction of the source. The FET is supposed to be in saturation mode; a number of authors refer to it as active mode, for a better analogy along with bipolar transistor operating regions. The saturation mode, or the region in between the ohmic and saturation, is employed while amplification is required. The in-between region is occasionally considered to be part of the ohmic or linear region, even in which drain current is not approximately linear with drain voltage.
Although the conductive channel made by gate-to-source voltage no longer connects source to drain throughout saturation mode, from flowing the carriers are not blocked. Considering once again an n-channel device, a depletion region available in the p-type body that surrounding the conductive channel and drain and source regions. The electrons that have the channel are free to move out of the channel by the depletion region if attracted to the drain through drain-to-source voltage. The carriers' depletion region is free and comprises a resistance identical to silicon. Any type of rise of the drain-to-source voltage will increase the distance from drain to the pinch-off point, increasing resistance because of the depletion region proportionally to the applied drain-to-source voltage. This proportional change results in the drain-to-source current to remain comparatively fixed independent of changes to the drain-to-source voltage and quite different the linear mode operation. So in saturation mode, the FET acts like a constant-current source rather than like a resistor and can be used most efficiently as a voltage amplifier. In this type of case, the gate-to-source voltage ascertains the level of constant current by the channel.
This is a project on music synthesis with sinusoids. The project requires programming effort in Matlab, a software package which is installed in the computer labs in the School of
Explain in detail the various energy resources and their availability. Explain the following: (a) Types of power plants (b) Selection of power Plants
Define Voltage Source Multiplying DAC? Voltage source multiplying DACs use a reference voltage which is switched in or out by the digital data. The converter is so-named becau
design and sketch an optimal circuit that takes a 4 bit number and generates an 8 bit output equal to the square of the input
four configurations of differential amplifiers
Elementary Induction Machines In the discussion that followed Equation, the third possiblemethod of producing constant torque was to cause the mmf axes of stator and rotor to r
Speed Control of DC Series Motor A half wave circuit for the speed control of DC series motor is shown in figure and corresponding wave from is shown in figure consis
need calculation
For a helical antenna, the half-power beamwidth and directive gain are given by where C = πD, N = L/S, and S = C tan α,in which α is called the pitch angle, and The
Using Bode plot calculate (a) Phase margin (b) Gain margin (c) Stability of closed loop system. The open transfer function of the system is t=30/(s+2)/(s+3)Using Bode plot calcula
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd