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Example_Small_Signal_Diode_Switches

Example_Small_Signal_Diode_Switches - Example Small Signal...

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2/14/2006 Example Small Signal Diode Switches 1/5 Jim Stiles The Univ. of Kansas Dept. of EECS Example: Small-Signal Diode Switches and Attenuators Consider now this junction diode circuit, which includes a very large capacitor and a very large inductor: Note there is both a small-signal and DC voltage source, and thus a small-signal and DC output voltage. Let’s see if we can determine the relationship between the small signal source v s and the small-signal output voltage v o . v s ( t ) V C 1 K + V O + v o ( t ) - n =1

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2/14/2006 Example Small Signal Diode Switches 2/5 Jim Stiles The Univ. of Kansas Dept. of EECS First, we must perform a DC analysis . Our first step of course is to determine the DC circuit, a step that is easily completed once we: 1 . Turn off the small-signal source v s ( t ). 2. Replace the capacitor with an open circuit. 3. Replace the inductor with a short circuit. The DC circuit is thus: Replacing the junction diode with the CVD model, we find ( I’m skipping the IDEAL diode analysis steps—but that doesn’t
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Example_Small_Signal_Diode_Switches - Example Small Signal...

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