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RA09 - such loads 1 Calculate the time constant associated...

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EE40 Summer 2011 Neel Shah Reading Assignment 9 – Ch.10.1-10.3 7/13/2011 Boilerplate: Reading assignments are short exercises that verify your understanding of the required reading. All chapters and page numbers are in reference to “Foundations of Analog and Digital Electronic Circuits” by Anant Agarwal and Jeffrey Lang. This assignment is optional; however it may count towards a final grade boost should you require it. Consider the following circuit, where the 1 gΩ resistor represents a load (such as a microcontroller pin input or the input resistance to a drive circuit). It is common practice to place a pair of decoupling capacitors of different sizes close to each resistive load when a single power supply is driving multiple
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Unformatted text preview: such loads. 1. Calculate the time constant associated with each capacitor. 2. Why is it more beneficial to place two capacitors of different orders of magnitude rather than one equivalent capacitor (in this case 10.1 G± )? Think about the different kinds of power supply variations that can happen. 3. Given the parasitic model of a PCB trace below, explain why it is more beneficial to place the capacitors as close to the resistive load as possible. (Insert the model below in the circuit above and think about its effects on fast transients in VCC)....
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  • Summer '08
  • Chang-Hasnain
  • power supply, Switched-mode power supply, Electrical impedance, Series and parallel circuits, resistive load

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