2 set up the optimization to do an optimization you

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2. Set up the optimization: To do an optimization, you have to select those meters which will be monitored during the iteration and which represent the goal of the optimization. In this example, this is the meter “Out.” You must also select those parameters which will be varied during the optimization. In this example, these parameters are the resistance of R1 and the capacitance of C1. a) Target: Use the command Analysis.Optimization Target or the Select Optimization Target speed button and click on the voltmeter (Out). A dialog box appears. When you press the AC Goal Functions… button another dialog appears which allows you to set the goal function for this meter. The specification contains two conditions. The first defines the new maximum point of the curve. To set this value, click on the Center Frequency tab, then enter 14k in the Target center frequency edit field. The other condition is the new maximum, -7dB. Select the Maximum tab and enter -7 in the Maximum edit field. The last step is to activate the current goal functions which are the combination of two functions. On the left side of the dialog, select both the Center Frequency and the Maximum function by clicking on the checkbox next to them. Finally press OK twice. b) Control object: Use the command Analysis.Control Object or the Select Control Object speed button and click on the first control object (R1). In the resistor property dialog, click on the first line, the resistance parameter. Press the Select button to reach another dialog where you can define the Start and End values for the variation of this parameter. Enter 1k and 10k respectively and press OK. Repeat this procedure for the capacitor (C1), and specify 1n and 10n for the Start and End values respectively. 3. Start the optimization: From the Analysis menu, choose Optimization then AC Optimization (Transfer)… Accept the settings in the dialog and press OK. Now TINA will find new R1 and C1 values that will satisfy the specification for the transfer function. After a short iteration the result– the new resistor and capacitor values–will be shown in a dialog box. 4. Checking the result: Run Analysis/AC Analysis/AC Transfer Characteristic… to check the new transfer function. The maximum now occurs at 14kHz, with a level at the maximum of -7dB. The optimization was successful
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Fourier Series and Fourier Spectrum Fourier analysis – Introduction In Tina there are many advanced analysis features that provide powerful professional tools to study and evaluate electronic circuits both numerically and graphically. One of them is called spectral or Fourier analysis. In this booklet we will demonstrate Tina’s implementation of Fourier analysis which covers two different methods: Fourier series and Fourier spectrum. We will especially emphasize applications that are not described in detail in the manual of Tina. In the following we will shortly summarize the theory behind Fourier analysis, and then present examples on the topic. All the examples are available on floppy disk, as well.
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