AN2515 Freescale Semiconductor / Motorola, AN2515 Datasheet - Page 5

• Manufacturer Part Number: AN2515
• Description: 3-Phase Sine Wave Generator - 3 outputs version TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA
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6
4
2
0
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-4
-6
-8
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3-Phase Sine Wave Generator – 3 outputs version TPU Function Set (3Sin3)
The function cos is calculated using a table of 32 values from the first quadrant
of one cosine wave period. The function parameter is mirrored into the first
quadrant. The function value is obtained by linear interpolation between two the
closest table values.
calculation. The maximum error is 7 in the amplitude range <–32768, 32767>,
that is 0.021%.
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Theta
s
s
s
A
B
Freescale Semiconductor, Inc.
C
For More Information On This Product,
Figure 2. Cosine function value error
cos
cos
s
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Theta
Theta
Theta
A
Go to: www.freescale.com
s
B
dTheta
Figure 2
120
40
angle [deg]
shows the error of the cosine function value
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Detailed Function Description
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AN2515/D
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