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Project Title: High Temperature Electronic Circuits Participants: Donnel Pancho, Romanelyn Tan, William Thai, Tiana Taef

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Project Title: High Temperature Electronic Circuits Participants: Donnel Pancho, Romanelyn Tan, William Thai, Tiana Taef

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    1. 7/26/2012 Project Title: High Temperature Electronic Circuits Participants: Donnel Pancho, Romanelyn Tan, William Thai, Tiana Taefi Faculty Advisor: Prof. Das & Prof. Clark Sponsor: LMI Scientific Objective: To design an 8MHz crystal oscillating circuit using a 4MHz crystal and conventional values that withstand high temperature (300C) Approach & Methodology: Re-design the 5MHz crystal circuit to a 4MHz crystal circuit, add a buffer to the drain then full wave rectify the circuit. Finally, use a wien-bridge circuit to fine tune the frequency. Conclusion: The circuit was designed and simulated in low-temperature prototype. The high temperature crystal can be better implemented using Gallium Orthophosphate an Silicon Carbide diodes which can withstand high temperatures for too long. Background: High temperature crystal oscillators are needed for logging applications in geothermal wells. Geothermal wells generates 5% of our nation’s energy.

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