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Doepfer Inte kategoriserad A-110

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doepfer System A - 100 VCO A-110

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

PW CV 1

PW CV 2

CV 1 Range

A-110

VCO

Tune

A-110 VCO System A - 100 doepfer

2. VCO Overview Controls:

1 Range: 5-position Octave or Footage switch

2 Tune: Fine tuning control

3 CV 2: Attenuator for voltage at CV 2 (!)

4 PW: Manual control for Pulse Width

5 PW CV 2: Attenuator for PWM voltage at PW

CV 2 (")

In / outputs:

! SYNC: Sync input

" CV 1: Voltage control input 1

§ CV 2: Voltage control input 2, level ad-

justable with ➂

$ PW CV 1: PWM input 1

% PW CV 2: PWM input 2, level adjustable with ➄

&: Sawtooth output

/: Square wave output

(: Triangle wave output

): Sine wave output

VCO

CV 1

CV 2

PW CV 1

Tune

CV 2

PW CV 2

Range

SYNC

➀

➁

➂

➃

➄

+,-.

PW CV 2

0 10

010

0 10

-2

STANDARD VCO

doepfer System A - 100 VCO A-110

3. Basics

Module A-110 puts out four waveforms simultaneously.

All these signals have the same pitch, since all are

controlled by the same voltages present at inputs "

and §.

Sawtooth

The VCO’s sawtooth waveform is present at output &.

It has a ‘cutting’ sound, rich in overtones. All the

harmonics of the fundamental are present, with a linear

reduction in intensity as the harmonic series progres-

ses - so that the second harmonic is half as

Fig. 1: Harmonic spectrum of a sawtooth

strong, the third is one third, the fourth a quarter, and

so on (see Fig. 1).

Sawtooth waves are ideal for synthesizing sounds

which are rich in harmonics, such as percussion, brass

or vocal timbres.

Square wave

The VCO produces a square / rectangle wave at output

/. You can alter its pulse width manually, or by voltage

control (Pulse Width Modulation).

Fig 2: Square waves with different pulse widths

f f

Harmonics

➨

100%

1/f 1/f

Produktspecifikationer

Varumärke:	Doepfer
Kategori:	Inte kategoriserad
Modell:	A-110
Färg på produkten:	Zwart
Vikt:	1200 g
Bredd:	159 mm
Djup:	198 mm
Höjd:	79 mm
Sladdlängd:	0.6 m
Typ av förpackning:	Doos
USB-kontakttyp:	USB Type-A, USB Type-C
Medföljande kablar:	DC
Inbyggd fläkt:	Ja
Antal USB-anslutningar:	2
Avsedd för:	Universeel
Antal per paket:	1 stuk(s)
Inspänning:	24 V
Uteffekt:	600 W
Typ av mat:	Auto
Strömspänningsskydd:	Over voltage, Overheating, Overload, Short circuit
Frekvens:	- Hz
Spännande:	230 V
Lämplig för inomhusbruk:	Ja
Typ av kylning:	Actief
Toppeffekt:	1200 W
Lämplig plats:	Auto
Antal per låda:	1 stuk(s)
Utgångsfrekvens:	50 Hz
Vågform:	Sinus
Strömströmstyp:	DC-to-AC