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Brain Running Slow This A.M. - Time Delay from Laplace ??

My brain is running on slow this A.M.

I can't remember how to calculate time delay versus frequency, given the Laplace transform.

Please refresh my brain cells.

Thanks!

...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.

Reply to
Jim Thompson
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Given your first post, I would have answered as Mr. Gaddi did. However, it seems now that you want either group delay or phase delay. Since phase delay is pretty obvious, I'm guessing it's group delay that you want. Given the Laplace transfer function, F(s), substitue j*w for s, then take the derivative of phase with respect to w. That is group delay. (Pronounce 'w' as omega.)

--
--Larry Brasfield
email: donotspam_larry_brasfield@hotmail.com
Above views may belong only to me.
Reply to
Larry Brasfield

That's how to INSERT delay.

Given F(s), what's the time delay versus omega?

...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.

Reply to
Jim Thompson

Thanks! It's coming back to me.. d(phase)/d(omega)

...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.
Reply to
Jim Thompson

IIRC, L{y(t - d)} = Y(s) * e^(-ds)

Reply to
Rob Gaddi

But I build only anticipatory circuits ;-)

...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.
Reply to
Jim Thompson

don't forget the negative sign!:

-dø GD = ---- dw

Reply to
gwhite

No, but they're _this close_.

Mark L. Fergerson

Reply to
Mark Fergerson

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