Analog equalizer circuit design, implementation & simulation
Design and analysis of an analog equalizer for targeted audio signal frequency shaping, developed as part of an Electrical Engineering workshop at KIT. The project covers second-order Sallen-Key high-pass and low-pass filters with a cutoff frequency of 1 kHz and quality factor of 0.5, an inverting adder circuit with variable resistors, LTSpice simulation of all filter stages, and hardware implementation on a TI breadboard with oscilloscope measurements.
Project Highlights
Synthesized Sallen-Key 2nd-order low-pass and high-pass filters with Q=0.5 and f_c=1 kHz.
Simulated filter frequency response in LTSpice and verified with Bode diagrams.
Built and measured filter circuits on a TI breadboard using an oscilloscope and Lenlab.
Designed an inverting adder with variable resistors enabling adjustable bass/treble equalisation.
Demonstrated allpass behaviour by inverting the low-pass signal before summation.
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