Re: Bode and Nyquist diagram for TI 92

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: Bode and Nyquist diagram for TI 92
From: "Shawn D'Alimonte" <sdalimon@WWW.EE.RYERSON.CA>
Date: Mon, 21 Dec 1998 04:44:57 GMT
Organization: Ryerson Polytechnic University
References: <01be2780$ab4b79a0$36c1d8d4@686>
Reply-To: "Shawn D'Alimonte" <sdalimon@WWW.EE.RYERSON.CA>
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Franco Sferlazza <sferlazza@TIN.IT> wrote:
: Are there programs for Bode, Nyquist ( and so on ) diagrams ?
: Please help me to find it !

On the TI85 I just used the definition of the Bode Plot.  Try something like:

j=(0,1)     /* Or make it a constant */
s=jw
w= 10^x     /* To get log scale on x axis)*/
H=xfer func(w or s)

and plot abs H and/or angle H.  Actually you will likely want to plot
20log(H) to get it in dB.

The co-ordinates on the x axis (In the limits and co-ordinate displays)
will actually be log(w) so 1000 will show as 3, etc.

I used this throughout Control Systems I and it works fine (although
the 85 is a little slow at plotting these).

--
Shawn D'Alimonte - sdalimon@ee.ryerson.ca
-----Under university lab conditions, the laws of nature do not apply-----

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