Figure 1.13. On the left is an ideal current source. The symbol is a circle with an arrow inside. The arrow points in the direction of current flow. In this circuit the arrow is pointing up. The current source is labeled I N. The bottom end of I N is connected to the bottom line of the circuit. The upper end is connected to the top end of a resistor labeled R N. The lower end of R N is connected to the bottom line. The upper output terminal is connected to the top of I N and R N. The lower terminal is connected to the bottom line. End verbal description.
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