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 =0? At =? in V out V R C ( 29 1 tan RC - =- ( 29 2 2 1 in out V V RC = + 3dB 3dB 1 2 2 f RC = = RC = High pass filter in V out V ( 29 2 1 out in RC V V RC = + 1 1 tan RC - = RC = 3dB 3dB 1 2 2 f RC = = At =0? At =? 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 = + ( 29 2 2 2 2 2 1 out temp R C V V R C = + ( 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 = + + At =0? At =? Bode plot The gain of the transfer function H can be represented in dBs 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 dBs ( 29 2 2 1 1 out in V H V RC = = + ( 29 2 2 1 1 1 H RC = + ( 29 2 2 1 1 1 H RC RC = + 1 RC < 1 RC Inductors dI V L dt = C Z j L = Bandpass filter...
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lecture02 - BIEN 130: Bioinstrumentation L02 April 2, 2009...

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