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exam1 - 1 20.180 Exam 1 23 March 2006 50 minutes closed...

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1 20.180 Exam 1 Name: _______Answer Key___________ 23 March 2006 50 minutes, closed book Question 1 (40 points): BioBricks & Mortar, Inc. has been having some staffing problems in their Department of Abstraction; they’ve produced the following set of bizarre genetic devices: Using only the parts from these devices, remake three functionally independent and reusable inverters – include a sketch for how each inverter device works, including labels on device input and output signals and internal device logic. Then, sketch (at the device level) two different ring oscillator systems that can be built from your inverters. Finally, note that a simpler oscillator can be made connecting the output of an amplifier device to its own input, while simultaneously regulating the input to the amplifier via an inverter that is also connected to the amplifier’s output. Define a reusable amplifier device and sketch (at the device-level) a two-device oscillator. Three functionally independent and reusable inverter devices made from the above parts: Two different ring oscillators built from the above inverters: A PoPS-based amplifier device and a two-device oscillator:
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