Analog Synthesizer

Analog electronics · audio circuits

An analog synthesizer, in progress. The Altium project is set up with eleven sheets; the VCO is the one that is drawn and simulates. Nothing has been built yet.

Status In progress — VCO simulated, no hardware

Focus Oscillators, filters, audio signal paths

Tools Altium Designer, LTspice

Altium schematic of VCO1: a TL074 integrator reset by an LM311 comparator forms the sawtooth core, followed by pulse, triangle and SSM2212 sine waveshapers

Overview

The VCO block is drawn and simulates. The remaining sheets — filter, amplifier, control and output — are stubs. Hardware comes after they simulate.

Planned subsystems

Oscillator stage for generating the core waveform sources.
Filter and shaping stages for tone control and sound design.
Control interface for pitch, tuning, and playable parameters.
Output stage suitable for speaker or line-level audio testing.
PCB layout once the breadboarded architecture is validated.

Next steps

Next steps are simulation cleanup, first-pass breadboard testing, signal-level checks, noise measurements, and PCB layout after the major circuit blocks are stable.