{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Set12 - Signal Conditioning(I Signal Conditioning(I Signal...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Signal Conditioning (I) Signal Conditioning (I) Signal Conditioning (I) Signal Conditioning (I) • Filters – Passive Filters (L, R, C circuits) – Active Filters (Op Amp circuits) oading Effect ME365 Signal Conditioning (I) Slide 1 Galen King Purdue University • Loading Effect – Energy Flow Between Two Subsystems • Operational Amplifiers – “Golden Rules” – Op Amp Circuits Anti Anti Anti Anti-Aliasing Filter Aliasing Filter Aliasing Filter Aliasing Filter an analog filter that removes signal frequencies above f s /2, where f s is the sample frequency Amplifier Low-pass Filter ADC Input Signal Computer ME365 Signal Conditioning (I) Galen King Purdue University Slide 2 Filters Filters Filters Filters Filter G ( j ϖ ) Input Output x(t) y(t) Electrical Quantities: Voltage, Current, Impedance ... Electrical Quantities: Voltage, Current, Impedance ... Adjust Gain (Scaling); ME365 Signal Conditioning (I) Slide 3 Galen King Purdue University • Characterized in the frequency domain through frequency response function. • Can be implemented using passive elements (R,L,C), active elements (Op Amps, transistors) or digital components . “Clean up” Noise; Isolate Interested Signal; Change frequency range; Integrate; Differentiate; ... • Low Pass Filters (LP) Frequency Response tatic Sensitivity (Gain) Passive Filters Passive Filters Passive Filters Passive Filters ( 29 G j K j ϖ τ ϖ = + 1-20-10 Gain dB Bode Plot for a 1st Order Low Pass Filter PASS BAND ME365 Signal Conditioning (I) Slide 4 Galen King Purdue University – K : Static Sensitivity (Gain) τ : Time Constant – Cut-off Frequency ( ϖ C ) At ϖ C , [ ] ϖ τ C rad /sec = 1 ( 29 ( 29 G K K ϖ C of = = 2 70% 10-1 10 10 1-30-60-90 Frequency (rad/sec) Phase deg 10-1 10 10 1-30-45 o ϖ C • Low Pass Filters (LP) Passive Implementation (RC Network) Passive Filters Passive Filters Passive Filters Passive Filters Vo R C Vin ME365 Signal Conditioning (I) Slide 5 Galen King Purdue University Impedance (Z) Analysis: – Resistance ( Z R ): – Capacitance ( Z C ): ( 29 G j Vo Vin R j LP ϖ ϖ = = + 1 1 C τ ϖ ϖ LP RC RC K = ← = ← = ← → Time Constant Cut - off Frequency Gain as C 1 1 Z V I R R R R = = Z V I C j C C C = = 1 ϖ • High Pass Filters (HP) Frequency Response ensitivity (Gain) Passive Filters Passive Filters Passive Filters Passive Filters ( 29 G j K j j ϖ τ ϖ τ ϖ = + 1-20-10 Gain dB Bode Plot for 1st Order High Pass Filter PASS BAND ME365 Signal Conditioning (I) Slide 6 Galen King Purdue University – K : Sensitivity (Gain) τ : Time Constant – Cut-off Frequency ( ϖ C ) At ϖ C , [ ] ϖ τ C rad /sec = 1 ( 29 ( 29 G K K ϖ C of = = 2 70% 10-1 10 10 1-30 10-1 10 10 1 30 60 90 Frequency (rad/sec) Phase deg-45 o ϖ C • High Pass Filters (LP) Passive Implementation (RC Network)...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern