A-110-4 Quadrature Thru Zero VCO

Thru-zero quadrature VCO

Doepfer · 8 HP · 3U

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LFrq
LFM
LFM
A-110-4 QZVCO
Quadrature Thru Zero VCO
1V/Oct
XTune
XFM
XFM
TZ Control
Sine
Cosine

Panel · 40.6 × 128.5 mm

Description

Doepfer's quadrature VCO with thru-zero linear FM: a sine and a cosine 90 degrees apart, its pitch set by an exponential and a linear section.

Key features

  • Sine and cosine outputs, in quadrature (90 degrees apart)
  • Exponential section: XTune, 1V/Oct input and XFM input with its attenuator
  • Linear section: LFrq (linear frequency) and LFM input with its attenuator, for thru-zero linear FM
  • TZ Control lamp, red for a positive linear control voltage, yellow for a negative one
  • With LFrq fully clockwise it behaves as a standard quadrature VCO

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