lec29_handout - From last time Internal noise: Johnson...

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ME365 Noise and Noise Rejection 1 From last time… Internal noise: – Johnson noise (thermal) – Shot noise (quantization) – Flicker noise (low frequency) Noise through a system ߶ ݂ൌ2 ܫ ݍܴ [volts 2 /Hz] ߶ ி ݂ൌ ܥ ݂ [volts 2 /Hz] ߶ ݂ൌ4 ݇ ܴ ܶ [volts 2 /Hz] ߶ ௢௨௧ ݂ ܶ ݆2ߨ݂ ߶ ௜௡ ݂ ME365 Noise and Noise Rejection 2 Sources of Noise External AC Interference 60/120/180/240 Hz sinusoidal interference due to power lines, fluorescent lights, fans, etc. Communication Interference Radio/TV (1-100 MHz), cordless phone, cellular communication interference. Switching Interference Switching interference due to switching power supplies, relays,
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ME365 Noise and Noise Rejection 3 Noise Spectrum ME365 Noise and Noise Rejection 4 Modes of Interference Series Mode Interference Noise or interference voltage
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This note was uploaded on 12/26/2011 for the course ME 365 taught by Professor Merkle during the Fall '07 term at Purdue University-West Lafayette.

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lec29_handout - From last time Internal noise: Johnson...

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