Doepfer A-110 Standard VCO - Manual

doepfer System A - 100 VCO A-110
1
1. Introduction
Module A-110 (VCO) is a voltage-controlled oscilla-
tor.
This VCO’s frequency range is about ten octaves. It
can produce four waveforms simultaneously: square,
sawtooth, triangle, and sine wave.
The Frequency or pitch of the VCO is determined by
the position of the octave (Range) switch and tuning
(Tune) knob, and by the voltage present at the CV
inputs. Frequency modulation (FM) of the VCO is
therefore a possibility. Footage (the octave of the
fundamental) is set by the Range control, and Fine
tuning controlled by the Tune knob.
You can control the pulse width of the square wave
either by hand, or by voltage control - Pulse Width
Modulation or PWM.
H Because of the analog nature of the design,
the VCO may need about 20 minutes’ warm-
up time for the tuning to become completely
stable.
SYNC
CV 2
CV 2
PW CV 1
PW CV 2
PW CV 2
PW
CV 1 Range
A-110
VCO
Tune