Recent content by bl965

Homework Statement A simplified E versus k curve for an electron in the conduction band is given. the value of a is 10 Å. Determine the relative effective mass m* / m0. Homework Equations [/B] m* = ħ2 / (d2E /dk2) m0 = 9.11 E-31kg 3. The Attempt at a Solution The second derivative must...

Homework Statement The equations provided require the oxide permittivity (εox)as well as the oxide thickness (tox) to determine the gate oxide capacitance per unit squared (Cox). How to solve this? Homework Equations In triode region: ID = μn * Cox * W/L * ((VGS-Vth)* VDS - VDS2/2 In...

(b) We can relate this linear relationship to Fthrust = F0-γv [Note: γ is a constant representing the slope of the F(v) line]. For each fan, based on your approximation in (a), what are the values for F0 and for γ?

If pressure is 0, volumetric flow is high, and small pressure * area is small force. As pressure increases, there will be more force with less flow. Makes sense. From start the fan is operating at atmosphere. I get high results when I search for one atmosphere in mm of water. Am I on the right...

1. Homework Statement Hi. This is a problem related to designing a RC hover craft. We are given a datasheet for a fan used as thrust. http://imgur.com/6liZSid Sorry image post no working, url: http://imgur.com/a/6XLwL We have to approximate the equation to a straight line through the curve...

Homework Statement A bypass capacitor increases gain in the mid-band region. Explain how with the figure and small signal model. Assume gm=0.5mS. Homework Equations Rs = 1 k Ohm The Attempt at a Solution With the bypass capacitor, the source would be treated as grounded and the equations...

V0=Vsrz/(Rs)+rz+VzoRs/(Rs+rz)-ILrzRs/(rz+Rs)

If the radio does not draw any current, than the circuit is the battery, the resistor and the Zener. The current would not change. When learning forward bias diode voltage regulation, when the load changes current, that change is added or removed from the diode and the change in voltage is...

The current law must be obeyed. If the radio does not draw the current it must pass through the zener. How can this be possible if the zener cannot handle more than 30 mA?

V2-V1=VTln(I1/I2) = 0.025 ln (10/0.1) = 115.1 mV ?

From what i researched it depends on the diodes physical characteristics. The information above is all that is provided. I could not find a constant value for Is.

i = IseV/VT is the only equation and Is is not given.

Homework Statement Homework Equations V0=Vsrz/Rs+rz+VzoRs/Rs+rz-ILrzRs/rz+RsThe Attempt at a Solution I formulated 4 cases for voltage inputs of 11 and 13.6 V and 0 to 100 mA. The zener current has to be between 3 and 30mA or 103 and 133mA. How can the current be maintained in thes two...

The only other equation in the section is i = IseV/VT. How would I find change in voltage?

Homework Statement Find the change in diode voltage if the current changes from 0.1 mA to 10 mA. Ans. 120 mVHomework Equations V2-V1=VTln(I1/I2)The Attempt at a Solution That is all the information given. The only equation I can think to use is the diode voltage/current relationship, but a...