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PublishAlannah Alyson Glenn Modified over 6 years ago
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Signal Detection and How to Build an Audio Amplifier
Rebecca Laughon YSP Student CURENT Young Scholars Program 18 July 2016 Min H. Kao Building, University of Tennessee
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Agenda Signal Detection Overview Audio Signal Dilemma/Solution
Preliminaries Amplifier Design and Simulation Amplifier Prototype
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Examples of Signal Detection
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Agenda Signal Detection Overview Audio Signal Dilemma/Solution
Preliminaries Amplifier Design and Simulation Amplifier Prototype
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Audio Detection Dilemma
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Proposed Solution Amplifier
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40 mVmax Electrical Signal
Voice Microphone Audio Signal 40 mVmax Electrical Signal Amplifier Amplified Electrical Signal Gain ≈ 70 Speaker Power output =1Watt
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Agenda Signal Detection Overview Audio Signal Dilemma/Solution
Preliminaries Amplifier Design and Simulation Amplifier Prototype
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Laws Ohm’s law - V=IR Kirchhoff’s Voltage Law/KVL P=VI
Kirchhoff’s Current Law/KCL Ohm’s law - V=IR P=VI Energy E Joule Power P Watt – 1W = 1J/S Charge Q Coulomb Current I Ampere – 1A = 1Q/S Voltage V Volt – 1V = 1J/Q Resistance R Ohm
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Resistors Resistance - R =
Series resistors - Rtotal = R1 + R2 + R3. . . Parallel resistors - Rtotal =
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Ideal Operational Amplifiers
Infinite input resistance Zero input offset voltage I1 = 0 0V I2 = 0
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Inverting Amplifiers Gain = Gain of this amplifier = -10
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Agenda Signal Detection Overview Audio Signal Dilemma/Solution
Preliminaries Amplifier Design and Simulation Amplifier Prototype
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Amplifier Design
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Circuit Simulation Results
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Agenda Signal Detection Overview Audio Signal Dilemma/Solution
Preliminaries Amplifier Design and Simulation Amplifier Prototype
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Acknowledgements This work was supported primarily by the ERC Program of the National Science Foundation and DOE under NSF Award Number EEC Other US government and industrial sponsors of CURENT research are also gratefully acknowledged.
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Questions and Answers
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