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!
BJTs have some benefits over MOSFETs for at least two digital applications. Very first, in high speed switching, they do not comprises the "larger" capacitance from gate, which while multiplied by the resistance of the channel provides the intrinsic time constant of the process. The intrinsic time constant places a boundary on the speed a MOSFET can operate at since higher frequency signals are filtered out. Widening the channel decreases the resistance of channel, but raises the capacitance by closely the same amount. Reducing the width of the channel increases the resistance, but decreases the capacitance by similar amount. R*C=Tc1, 0.5R*2C=Tc1, 2R*0.5C=Tc1. There is no way to minimize the intrinsic time constant for a specific process. Different processes by using different gate thicknesses, channel lengths, channel heights, and materials will have different intrinsic time constants. This problem is mostly prevented with a BJT as it does not have a gate.
The 2nd application in which BJTs have a benefit over MOSFETs stems from the first. While driving several other gates, called fan out, the resistance of the MOSFET is in series along with the gate capacitances of the other FETs, making a secondary time constant. Delay circuits make use of this fact to make a fixed signal delay by using a small CMOS device to send a signal to many other, several times larger CMOS devices. The secondary time constant could be minimized by raising the driving FET's channel width to reduce its resistance and decreasing the channel widths of the FETs being driven, reducing their capacitance. The drawback is that it raises the capacitance of the driving FET and increases the resistance of the FETs being driven, but generally these drawbacks are a minimal problem when as compared to the timing problem. BJTs are better capable to drive the other gates because they can output more current than MOSFETs, permitting for the FETs being driven to charge faster. Several chips use MOSFET inputs and BiCMOS outputs.
can you let me know how much it would be for the answer to a question that has 2 parts
Importance: The transistor is the main active component in practically all current electronics, and is considered through many to be one of the greatest inventions of the 20 t
what are the grond clearance for 220KV overhead transmission lines?
a. Determine the circuit of three transistors dynamic RAM cell and define briefly read and write functions. b. Write short note on factors influencing choice of layer for wiring
Design a 4-bit synchronous counter that has the following sequence: 0 ?4? 9?12 ? 14 ?15 and repeat using: i) JK FF ii)D FF
Q. Reduce the circuit of Figure to a Thévenin and a Norton equivalent circuit with respect to terminals a-b.
WHAT IS DRIFT
Calculate Voltage and Current Phasors on a Phasor Diagram A synchronous motor is operated at rated load and unity power factor. The field current is increased by 20%. Show the
#full discuss on compensating windingsquestion..
what is the reason of low meagger result of dc motor
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd