Problem Set 8

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(11.1)

(a)

Derive equation (11.28) by taking the integral and limit of equation (11.27).

(b)

Show that equation (11.29) follows.

(11.2)

What is the expected occupancy of a state at the conduction band edge for Ge, Si, and diamond at room temperature (300 K)?

(11.3)

Consider Si doped with 1017 As atoms/cm3.

(a)

What is the equilibrium hole concentration at 300 K?

(b)

How much does this move EF relative to its intrinsic value?

(11.4)

Design a tristate CMOS inverter by adding a control input to a conventional inverter that can force the output to a high impedance (disconnected) state. These are useful for allowing multiple gates to share a single wire.