submodules


Introduction to ARP submodules
A brief tutorial on submodule types and encapsulation schemes.

Submodule listing
Listed below are submodules used in ARP synthesisers. A brief descritpion of each module is given, as well as information about which synthesiser model(s) the submodule was used in. Some of the more common modules are presented in greater detail by means of downloadable documents.
 
Designator Description Usage Documents
4001 Exponential Converter
  • Voltage input, dual current output (sink)
  • Temperature compensated
2500 oscillators N/A
4002 Exponential Converter
  • Voltage input, current output (source)
  • Temperature compensated
2500 oscillators N/A
4005-1P Variable Transconductance Cell
  • Differential input (PNP)
  • Linear control current input (sink)
1047 Multimode Filter (2500) N/A
4005-2N Variable Transconductance Cell
  • Differential input (NPN)
  • Linear control current input (source)
  • Temperature compensated exponential control voltage input
1047 Multimode Filter (2500) N/A
4005-3P Variable Transconductance Cell
  • Differential input (PNP)
  • Linear control current input (sink)
  • Temperature compensated exponential control voltage input
1047 Multimode Filter (2500) N/A
4010 Voltage Controlled Amplifier
  • Replaced by 4019 module
Early 2600 synthesisers PDF (11K)
Example Application
Designator Description Usage Documents
4011 Voltage Controlled Oscillator
  • Replaced by 4017 module
Early 2600 synthesisers N/A
4012 Voltage Controlled Filter
  • 4-pole low-pass transistor ladder
  • Temperature compensated exponential control
  • Cut-off frequency range approx. 0 - 35 kHz
  • DC-coupled signal path
  • Replaced by 4072 module
2600 (1970-1976), Soloist PDF (71K)
Schematic,
Example Application
4013 Voltage Controlled Filter
  • Similar to 4012 module
Soloist N/A
4014 Balanced Modulator
  • Dual complementary transconductance cells yield 4-quadrant multiplication
  • DC-coupled signal path
2500 and 2600 synthesisers PDF (41K)
Schematic,
Example Application
4015 Sample and Hold 2600 synthesiser PDF (87K)
Schematic,
Example Application,
Component Layout
4016 White Noise Generator
  • Replaced by 4022 module
Early 2600 synthesisers N/A
Designator Description Usage Documents
4017 Voltage Controlled Oscillator
  • Temperature compensated exponential control
  • 10 Vpp sawtooth output
  • External HF-tracking trim required
  • Replaced by 4027 module
Early 2600 synthesisers PDF (18K)
Example Application
4018 Waveform Converter
  • Converts sawtooth wave to triangle, sine, and pulse waves
Only sold separately N/A
4019 Voltage Controlled Amplifier
  • Linear and exponential control inputs
  • DC-coupled signal path
  • Replaces 4010 module
2600 synthesiser PDF (95K)
Schematic,
Example Application,
Component Layout
4020 Envelope Generator
  • Attack, Decay, Sustain, Release segments
  • RC-exponential slope shapes
2600 synthesiser PDF (20K)
Schematic and Example Application
4022 White Noise Generator
  • 8 Vrms output
  • Replaces 4016 module
2600 synthesiser PDF (16K)
Schematic and Component Layout
4023 Voltage Controlled Filter
  • 2-pole bi-quad design with low-pass output
  • Temperature compensated exponential control
2800 Odyssey ("white-face" and early grey/gold) PDF (43K)
Schematic, Example Application
Designator Description Usage Documents
4027 Voltage Controlled Oscillator
  • Temperature compensated exponential control
  • 10 Vpp sawtooth output
  • Replaces 4017 module, superseded by 4027-1
2600, Soloist N/A
4027-1 Voltage Controlled Oscillator
  • Temperature compensated exponential control
  • 10 Vpp sawtooth output
  • No HF-track trimming required
  • Replaces 4027 module
2600 synthesiser PDF (47K)
Schematic, Example Application
4030 Fixed Filter
  • Complex filter for "Violin" preset voice
Soloist N/A
4031 Fixed Filter
  • Complex filter for "Cello" preset voice
Soloist N/A
4032 Fixed Filter
  • Complex filter bank for "English Horn", "Oboe", "Banjo", preset voices
Soloist N/A
4033 Fixed Filter
  • Complex filter bank for "Bassoon", "Elec. Bass", "Elec. Piano", preset voices
Soloist N/A
Designator Description Usage Documents
4034 Voltage Controlled Filter
  • 4-pole low-pass transistor ladder
  • Temperature compensated exponential control
Pro Soloist,
Explorer 1
PDF (37K)
Schematic
4035 Voltage Controlled Filter
  • 4-pole low-pass transistor ladder
  • Temperature compensated exponential control
2810 Odyssey PDF (54K)
Schematic, Example Application
4072 Voltage Controlled Filter
  • 4-pole low-pass integrator cascade
  • Temperature compensated exponential control
  • Replaces 4012 module
  • Cut-off range limited to approx 12 kHz due to design miscalculation
2600 (1976-1981) PDF (57K)
Schematic,
4012 to 4072 conversion


PDF (436K)
"Dynamic Filter" patent
4075 Voltage Controlled Filter
  • 4-pole low-pass integrator cascade
  • Temperature compensated exponential control
  • Became the "standard" ARP VCF in 1976-77
  • Directly replaces 4035 module
  • Cut-off range limited to approx 12 kHz due to design miscalculation
2810-2823 Odyssey,
2310-2323 Axxe,
Omni, Omni-2,
Pro DGX, Avatar,
Quadra
PDF (52K)
Schematic, Example Application

PDF (436K)
"Dynamic Filter" patent

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