Finding Asymptotes from a frequency responce of a set of data

Jan 06, 2006 4 Replies
W

Hi



Can anyone help me find asymptote from a set of data in two column x and y that show the frequency responce of a say a RC network (e.g. bode plot)? Finding it from a function seem relatively easy but without a model for the data is there a method of finding two lines that meet to produce the turning point?


Cheers


WayneL



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W

Hi James

Thanks. I have already done this but I was hoping I could get some method of conducting it in say Excel?

Cheers

WayneL

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J

Plot _absolute_ data on log-log paper. And draw asymptotes to find intercept.

Or dB as the linear y-axis and frequency as the log x-axis.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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J

Sheeeesh! Can't you just "eyeball" it ?:-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

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T

See my reply in s.c.e.battery.

Ted

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