Recent content by pc2-brazil

Homework Statement Consider a family of logic gates that operate under the static discipline with the following voltage thresholds: VOL = 0.5 V, VIL = 1 V, VOH = 4.5 V, and VIH = 4 V. Using the switch-resistor MOSFET model, design an inverter satisfying the static discipline for the four...

What exactly do you mean by saturating the MOSFET? In this situation, would I have a single value of i_{DS} = \dfrac{v_{DS}}{R_{ON}} for v_{GS} \geq V_T, which would then be plotted as a horizontal line in the i_{DS} versus v_{GS} graph?

Thank you for the help, but, actually, the book I'm using doesn't present the square law model in the chapter where it asks this problem. So, I think I should be able to graph the approximate behavior of the MOSFET only by using the SR model (the MOSFET acts like a resistor R_{ON} in its ON...

Homework Statement A specific type of MOSFET has V_T = -1\ \rm V. The MOSFET is in the ON state when v_{GS} \geq V_T. The MOSFET is in the OFF state when v_{GS} < V_T. a) Graph the i_{DS} versus v_{GS} characteristics of this MOSFET. Homework Equations The Attempt at a Solution My doubt...

Homework Statement The attached figure is an illustration of a crude Zener-diode regulator circuit. a) Using incremental analysis, estimate from the graph an analytical expression for v0 in terms of V and Δv. b) Calculate the amount of DC and the amount of AC in the output voltage using the...

OK, thank you for confirming it and for providing an alternative approach.

Thank you for the answer. I think that I arrived at a solution. I tried to do it as follows: Since the voltage across the resistor is -v (in which I put a minus sign to follow the associated variables convention) and the current through the resistor is i, the power consumed by the resistor is...

Homework Statement The current-voltage characteristic of a photovoltaic energy converter (solar cell) shown in the attached figure can be approximated by: i = I_1(e^{v/V_{TH}} - 1) - I_2 where the first term characterizes the diode in the dark and I2 is a term that depends on light...

OK, I get it. This is because, for a capacitor with a relatively large capacitance, the plate separation is taken to be small. Right?

Thank you for the complete explanation. I have one more question about the external electric field of a capacitor: Let the potential difference across the plates of the capacitor be V. So, if we calculate the integral of the electric field along a path outside the capacitor from one plate to...

I have a conceptual doubt concerning capacitors. Suppose that I connect the terminals of a resistor to a charged capacitor, so that current will flow through the resistor. Usually, in calculations involving capacitors, the electric field outside the capacitor is taken to be zero, because it is...

I have some conceptual questions regarding capacitors and dipole antennas. Consider a parallel plate capacitor made with two conducting plates, initially uncharged. If I connect each plate to a different terminal of the battery, charge will start to flow from one plate to another. Consider...

Homework Statement An electric motor connected to a 120 V, 60 Hz supply does work at a rate of 0.1 hp (1 hp = 746 W). If it consumes an rms (root mean square) current of 650 mA, what is its resistance, in terms of power transmission? Would this result be the same thing as the resistance of its...

Homework Statement An oscillating LC circuit is designed to operate with a maximum current of 31 mA. The inductance is fixed at 42 mH, and the frequency is changed by means of a variable capacitor C. (a) If the highest voltage that the capacitor can handle is 50 V, can the circuit be operated...

Thank you for the response. But this raises a doubt: Since the induced voltage changes with time, and the applied voltage is constant (24 V), how does this system reach equilibrium? Does the maximum induced voltage have to be equal to the applied voltage? If so, why exactly is that true...