80-2

Voltage Controlled Oscillator

Courtesy/Thanks to: Digisound

Description: Voltage Controlled Oscillator based on CEM 3340.
Exponential response of 1V/octave. Fully temperature compensated. Very accurate in the range 5Hz to 10kHz (suitable for polyphonic use) but will operate over a range of 0.1Hz to 50kHz. Six outputs available simultaneously : 0-10V sawtooth, pulse, sine and triangle together with ±5V sine and triangle waves. Linear and exponential frequency modulation. Voltage and manual control of pulse width from 0 to 100%. Three synchronisation techniques may be used at the same time : hard negative, hard positive and soft.

(text courtesy of: http://www.digisound80.co.uk/digisound/)

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Modular Unit

VCO

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Files

80-2.jpg
	Frontpanel view of the 80-2 VCO
80-2.jpg
	Frontpanel view of the 80-2 VCO
80-2.pdf
	Service manual, with Schematics, PCB, componentlist for the 80-2 VCO
80-2_3_pcb.gif
	PCB for the Digisound 80-2 and 80-3

Manufacturers

Digisound Ltd
	Manufacturer of the Digisound 80 Modular system. Charles Blakey ran a small family-owned company cal

Modular mother system

Digisound 80
	Modular Synthesizer

Parts used

BZY88
	Zener Diode
LM1458
	Dual Operational Amplifier
CEM3340
	Voltage Controlled Oscillator
1N4148
	High speed Switching Diode
CA3080
	2MHz, Operational Transconductance Amplifier (OTA)
TL082
	JFet-input Operational Amplifier

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