lecture02

# lecture02 - BIEN 130 Bioinstrumentation L02 April 2 2009...

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Unformatted text preview: BIEN 130: Bioinstrumentation L02 April 2, 2009 Hyle Park Questions? Low pass filter • At ω=0? • At ω=∞? in V out V R C ( 29 1 tan RC φ ϖ- =- ( 29 2 2 1 in out V V RC ϖ = + 3dB 3dB 1 2 2 f RC ϖ π π = = RC τ = High pass filter in V out V ( 29 2 1 out in RC V V RC ϖ ϖ = + 1 1 tan RC φ ϖ- = RC τ = 3dB 3dB 1 2 2 f RC ϖ π π = = • At ω=0? • At ω=∞? Questions? • Durm analysis Bandpass filter • Both a low and high pass filter in combination to allow a specific range of frequencies through in V out V 1 R 1 C 2 R 2 C ( 29 2 2 1 1 1 in temp V V R C ϖ = + ( 29 2 2 2 2 2 1 out temp R C V V R C ϖ ϖ = + ( 29 ( 29 ( 29 ( 29 2 2 2 2 2 2 1 1 2 2 1 1 out in R C V V R C R C ϖ ϖ ϖ = + + • At ω=0? • At ω=∞? Bode plot • The gain of the transfer function H can be represented in dB’s as 20*log 10 (H) • In a Bode plot, the x-axis is the log 10 of the frequency, and then y-axis is the gain in dB’s ( 29 2 2 1 1 out in V H V RC ϖ = = + ( 29 2 2 1 1 1 H RC ϖ = ≈ + ( 29 2 2 1 1 1 H RC RC ϖ ϖ = ≈ + 1 RC ϖ < 1 RC ϖ Inductors dI V L dt = C Z j L ϖ = Bandpass filter...
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## This note was uploaded on 02/17/2010 for the course BIEN 130 taught by Professor Park during the Spring '10 term at UC Riverside.

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lecture02 - BIEN 130 Bioinstrumentation L02 April 2 2009...

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