Casio fx-7400G PLUS Booklet page 33

Graphic calculator - a booklet of practical examples for students

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Linear Regression

Pressing

(X)

and overlays it onto the scatter diagram as shown on the

screen nearby. Pressing

value indicated for "a=".

This result indicates that the following is the small signal

current amplification ratio of transistor 2SC1815.

Use the same procedure to determine the small signal current amplification

ratio h

of transistor 2SD1763.

(1) Measure values.

• Input measurement results into the table below.

Collector-emitter Current (mA)

Base Current

(2) Graph the results.

• Without deleting the previous data, input the base current into List 3 and the collector-

emitter current into List 4.

• Draw the graph. Select List 3 for the X-axis and List 4 for the Y-axis.

(3) Determine the small signal current amplification ratio h

• Use the graphic calculator's linear regression function to calculate h

(DRAW) performs linear regression

displays the slope, which is the

(µA)

– 30 –

EE-3 Small Signal Amplification Factor of a Transistor

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