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doepfer

System A - 100

Dual VC Polarizer

A-133

1. Introduction

Module A-133 (

Dual VC Polarizer

) is a

special dual

voltage controlled amplifier that enables both posi-

tive and negative amplifications. Negative amplifica-

tion means in this context that the signal is

inverted

The main application of the module is the processing

of control voltages

e.g. ADSR or LFO. But even

audio signals can be processed with this module.

The amplification range is about -2.5....0....+2.5. Am-

plification can be adjusted manually (Man control) or

by an

external control voltage

The present

amplification

displayed

with

two

LEDs: one for positive and one for negative amplifica-

tions.

A-133

Dual VC Polarizer

Out

Man.

Summary of content (4 pages)

PAGE 1
System A - 100 doepfer Dual VC Polarizer A-133 1. Introduction A-133 Dual VC Polarizer CV Module A-133 (Dual VC Polarizer) is a special dual voltage controlled amplifier that enables both positive and negative amplifications. Negative amplification means in this context that the signal is inverted. + CV - In Man. Out CV CV The main application of the module is the processing of control voltages, e.g. ADSR or LFO. But even audio signals can be processed with this module.
PAGE 2
A-133 Dual VC Polarizer System A - 100 Controls and indicators: 2. Overview ➊ ➋ ➌ 2 doepfer ➀ ➁ ➂ 1 LEDs : negative/positive amplification display (not a signal display !) 2 CV : attenuator for the control voltage at input ! that controls the amplification 3 Man.
PAGE 3
doepfer System A - 100 3. Controls and Indicators Dual VC Polarizer A-133 Man. LEDs a In Out 1 LEDs The two LEDs indicate the amplification of the polarizer in question (attention: in contrast to the LED displays of other modules they do not show the signal but the amplification factor !). -5 -2,5 -2 -1 Tab. 1 shows the connection between LED display and amplification. At maximum negative amplification (about -2.5, signal inverted !) the left LED lights with maximum brightness.
PAGE 4
A-133 Dual VC Polarizer System A - 100 ons would cause clipping for all standard A-100 signals (like LFOs, ADSRs or VCOs). If the amplification is negative the signal is inverted (see table above). The effects of the manual control 3 and the external control voltage ! with attenuator 2 are added up. CV In Out VCO This jack socket is the control voltage input to control the amplification by an external control signal. A-133 In Fig. 1: Generating new waveforms Same applies for modulations (see fig.