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Unformatted text preview: the left. The current through the device, i D (t), is related to the voltage across its terminals, v AB (t), by the equation, i D (t) = I C (v AB + 4 v AB 3 ), where I C = 10-3 A. There is no charge or flux storage associated with this device. i D Non-linear two-terminal device, D R i d A B -a b + +-v ab v AB A linear equivalent circuit for the device D valid for small signal operation about a bias point, v AB = V AB , is shown to the right. What is R for the bias point V AB = 2V? R = Problem 4 -Simple electrostatics In a certain sample of material the electric field, E(x,y,z), varies only in the x-direction, i.e., E(x,y,z) = E(x), where E(x) is shown below. The dielectric constant, e , is uniform throughout the sample with a value of 10-10 coul/V-cm. E(x) [V/cm] 2 10 -3-2 -1 1 2 3 x [µm] 2-10 On the axes provided below, sketch and dimension the net charge distribution in this sample. -3 -2 -1 1 2 3 x [µm] End of diagnosis; you may get up from the couch....
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This note was uploaded on 07/20/2009 for the course CSAIL 6.012 taught by Professor Prof.cliftonfonstadjr. during the Fall '03 term at MIT.
- Fall '03