1 / 13

ELEC 3030 Final design project

ELEC 3030 Final design project. Bass & Treble Control. Jordan Lewis & Elizabeth Devore. BASS VS. TREBLE. Bass controls low frequencies around 100 Hz Used to boost kick drum and bass guitar sounds. Treble controls high frequencies around 12kHz

kasen
Télécharger la présentation

ELEC 3030 Final design project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ELEC 3030Final design project Bass & Treble Control Jordan Lewis & Elizabeth Devore

  2. BASS VS. TREBLE • Bass controls low frequencies around 100 Hz • Used to boost kick drum and bass guitar sounds • Treble controls high frequencies around 12kHz • Used to boost sounds from upper octave piano and flutes

  3. BAXANDALL CIRCUIT • Tone control circuits • Uses resistors and capacitors (or inductors) • Low pass filter (treble-cut), attenuates at high frequencies • High pass filter (bass-cut) attenuates at low frequencies

  4. CIRCUIT LTSPICE DESIGN • After some tinkering….

  5. LOW-FREQUENCY ANALYSIS • Vx ≈ 0 • (Vi) / (RLF1+R1) ≈ (-Vo) / (RLF2+R4) • Av ≈ -(RLF2+R4) / (RLF1+R1) • -20dB < Av < 20dB

  6. HIGH-FREQUENCY ANALYSIS • Vx ≈ 0 • (Vi) / (RHF1+R3) ≈ (-Vo) / (RHF2+R6) • Av ≈ -(RHF2+R6) / (RHF1+R3) • -12dB < Av < 20dB

  7. Mid-Frequency Analysis • R7 = R8 = 1 / (2*π*1000*.1uF) = 1.6k • R9 = 1 / (2*π*1000*.001uF) = 160k • Av = (4.7k+(1.6k||RLF2)) / (4.7k+(1.6k||RLF1)) (-2.5dB < Av < 2.5dB)

  8. SIMULATION IN LT SPICE Treble boost Bass boost Mid-band

  9. THE BIG PICTURE • Bass/treble control circuit placed between detector and audio amp • Large gain

  10. BASS Boost Cut Mid

  11. TREBLE • Unable to view well on the scope at higher frequencies • Gain did not appear larger during simulation, but sounds louder

  12. FINAL THOUGHTS ON DESIGN • Audible change in bass and trebleachieved • Overall, great project!

  13. PART II • Mind-numbingly long and tedious hand calculations….

More Related