Audio Mixer Circuit Design

University of Washington, Seattle

06/2019 - 08/2019

Keywords: Circuit design, RLC circuit, Bandpass filters, Op Amps, Microphones, Buffer, Function generator, Oscilloscope, SPICE

Role

  • Electrical Engineer
  • Impacts

  • Implemented and simulated bandpass filter circuitries on SPICE.
  • Integrated and mixed signals from a AUX cable and microphones onto the mixer.
  • Demonstrated competency of using hardware debugging tools such as function generators and oscilloscopes
  • Skills

  • Circuit design
  • RLC circuits
  • Analog filters
  • Op Amp applications
  • Oscilloscopes
  • Function generators
  • SPICE circuit analysis
  • Descriptions

    We designed an audio mixer circuit from stratch. It picks up an audio from a AUX cable and another from a microphone. The circuit contains a buffer circuit and a low pass filter to delay and filter out white noises from the microphone. It also includes three bandpass filters which control the magnitude of active zones in three distinctive frequencies, which are the bass, the mid, and the treble. During our implementation, we used function generators to simulate our audio signals, and we used oscilloscopes to check our filtered signals. We also used SPICE to simulate our circuits before implementing it on the real board.

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