Purchase Solution

Transient current of logic gate due to change in logic

Not what you're looking for?

Ask Custom Question

A logic gate drives a load, which has a resistance of 1 kΩ and a capacitance of 20 pF. The printed circuit track connecting the gate to its load has an 40 pF capacitance to ground. The output changes state from 2.5 V to 0 V in 200 ps.

Determine the maximum output current to find the the initial surge of current for (a) use I=C*dv/dt

Purchase this Solution
Solution Summary

This solution involves calculating maximum current draw due to capacitive load of a logic gate when it changes state.

Solution Preview

In the steady state when the output is steady at 2.5V no current flows through the load. Effectively we can think of things unchanging in this the DC Domain where capacitances represent DC blocks (ie they have infinite impedances from Zc = 1/(omega*C , where at DC Omega the angular frequency is zero)

In contrast maximum current flows when the capacitance impedance is minimum, again when the output is changing most ...

Purchase this Solution
Free BrainMass Quizzes
Architectural History

This quiz is intended to test the basics of History of Architecture- foundation for all architectural courses.

Air Pollution Control - Environmental Science

Working principle of ESP

View More Free Quizzes
Related BrainMass Solutions

  • EMC and Logic Gate Transitions

    An analysis of how rapid logic transitions can cause current spikes during transition periods due to capacitive loading of logic gates.

  • Bode Plot for a Transfer Function

    Q11: The outputs of two "NAND" gates are connected to the inputs of an "EXCLUSIVE OR" gate. Each of the "NAND" gates has one input at logic high level, and the other input at a logic low level. What is the output of the "EXCLUSIVE OR" gate> a.

  • Logic Circuit Question

    36816 Logic Circuit Question Question: The outputs of two "NAND" gates are connected to the inputs of an "Exclusive Or" gate. Each of the "NAND" gates has one input at a logic high level, and the other input at a logic low level.

  • Different Logic family Gates

    (4) Transistor-Transistor Logic (TTL) The physical construction of integrated circuits made it more effective to replace all the input diodes in a DTL gate with a transistor, built with multiple emitters.

  • Electronics - Logic gates

    The output of that OR gate is a logic? 0? 1? 2? 3? ........and why?

  • Simplifying Circuits and Expressions for Logic Circuits

    Line C goes directly to the final NAND Gate. 7. Find the expression for the logic circuit: Line A enters a NOR Gate, exits, and enters a final AND Gate. Likewise, Line B enters the same NOR Gate, exits, and enters the same final AND Gate.

  • Discussion of Programming Logic

    72908 Discussion of Programming Logic Can you confirm the following statement? The outputs of two "NAND" gates are connected to the inputs of an "EXCLUSIVE OR" gate.

  • Boolean Functions and Logic Gates

    120527 Boolean Functions and Logic Gates Part A: Express the Boolean function F(w,x,y,z) in sum-of-products form Part B: Use Boolean algebra (and the Boolean equalities) or the Karnaugh map to simplify the Boolean expression.

  • Digital Logic, Boolean Algebra

    21058 Digital Logic: Boolean Algebra Write Boolean expression & draw the gate logic diagram & typical PLC logic ladder diagram for a control system wherein a fan is to run only when all of the following conditions are met: - Input A is OFF - Input

View More Related Solutions