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MCA Block Diagram Signal Comparator Peak and Hold Reset ADC USB Threshold PIC.

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Presentation on theme: "MCA Block Diagram Signal Comparator Peak and Hold Reset ADC USB Threshold PIC."— Presentation transcript:

1 MCA Block Diagram Signal Comparator Peak and Hold Reset ADC USB Threshold PIC

2 MCA Block Diagram Signal Comparator Peak and Hold Reset ADC USB Threshold PIC

3 Testing the PIC ADC ~40 μs; equivalent to 1/.000040 or 25 kcps Looking into other ADCs from 400 kcps to 20 Mcps

4 USB Case 1 -Full speed -Bulk transfer -Can USB keep us with 1 Mcps? 1 ms frames Nineteen 64-byte transactions per frame Probably not…requires ~33% max rate Case 2 -High speed -Bulk transfer -Can USB keep us with 1 Mcps? 125 μs microframes Thirteen 512-byte transactions per microframe Yes, even at <.8% max rate Assumes transfer after 2500 pulses on average Also, how much time does USB take?

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