HW #1 EE 330, Winter 2015

Posted Monday 1/5/2015

Due Tuesday 1/13/2015, hand to instructor BEFORE lecture begins

You MUST work in a group for homework assignments (min = 2, max = 3 people)

1. In the figure below, use superposition to find the current . (18 pts)

2. Find the component values , , , such that all three circuits shown

below behave identically. (15 pts)

3. The variable resistor in the circuit below is varied until = 6. What is

the value of ? DO NOT use node voltage or mesh current methods to solve

this problem. (21 pts)

4. (a) Sketch the I-V curve (i.e. ) for the circuit below. (18 pts)

(b) Sketch the I-V curve (i.e. ) for the circuit below. (9 pts)

Assume the following values:

= 200, = 1875

(c) Explain how you can use these 2 graphs to find 1 1 when the circuits

are connected together (see the circuit below)? What are the values of

1 1? (6 pts)

5. For the circuit below, find the value of Gm such that (v2/v1) = -4. DO NOT

forget the units. We will see later in the course that this circuit represents an

important transistor configuration. (12 pts)