Figure 4.18. This is a graph with the origin in the lower left corner and only the first quadrant showing. The vertical axis is labeled drain current and the horizontal axis is labeled drain to source voltage. There is a vertical dashed line about one third of the way across the graph. This line is labeled pinch off voltage. There are 4 data lines and all four begin at the origin. The first one slopes up to the right at about 30 degrees and curves over to become horizontal at the pinch off line. It is labeled V sub GS = minus 1.5 volts. The second one slopes up to the right at about 45 degrees and curves over to become horizontal at the pinch off voltage. It is labeled V sub gs = minus 1.0 volts. The third line slopes up at more than 45 degrees and curves over to become horizontal at the pinch off voltage. It is labeled V sub gs = minus 0.5 volts. The last line slopes up at about 60 degrees and curves over to be horizontal at the pinch off voltage. It is labeled V sub gs = 0 volts. End verbal description.
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