EM-105 | Variable Waveshape Oscillator

The EM-105 is a precision analog oscillator built around a thermally compensated, discrete sawtooth integrator core with matched transistor arrays. It provides calibrated 1V/octave tracking across eight octaves, with three selectable frequency ranges extending from sub-audio modulation to 20 kHz.

WAVEFORM ARCHITECTURE

Independent analog waveshaping circuits provide continuous transitions between falling sawtooth, triangle, and rising sawtooth waveforms, alongside variable pulse width and a low-distortion sine output derived from a dedicated diode shaping network. Both waveshapers feature independent voltage control.

A precision multi-turn frequency dial provides fine pitch adjustment, with a mechanical lock to maintain the selected setting.

SYNCHRONIZATION

Two distinct synchronization circuits offer different responses to external signals. JFET-based proximity synchronization provides gradual phase locking and subharmonic relationships, while hard cycle synchronization interacts directly with the oscillator's comparator feedback loop, producing complex harmonic transitions and aggressive, phase-dependent timbres.

SPECIFICATIONS

• Thermally compensated discrete analog oscillator
• Eight-octave calibrated 1V/octave tracking
• Three selectable frequency ranges
• Continuous sawtooth / triangle / sawtooth symmetry
• Voltage-controlled pulse width
• Dedicated low-distortion sine shaping
• Precision multi-turn frequency control with mechanical lock
• Independent proximity and hard cycle synchronization
• Three simultaneous waveform outputs

LA CIRCUITS, INC.

Official Website — https://circuits.audio
Instagram — https://instagram.com/lacircuits
Email — contact@circuits.audio

https://circuits.audio

• 70 mA +12V
• 70 mA -12V
• ? mA 5V
• 50 mm Depth

This Module is currently available.