SSM2040: Difference between revisions
Jump to navigation
Jump to search
Content added Content deleted
mNo edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
The ''' |
The '''SSM 2040''' is a [[Filters|4-pole filter]] from [[Solid State Micro Technology For Music|SSM]]. The device's cutoff frequency can be [[Exponential|exponentially]] [[voltage controlled]] over a 10,000 to 1 range. It is an extremely flexible circuit building block which can be used in virtually any active filter design including low-pass, high-pass, band-pass and notch. Roll-off characteristics can be selected to be Butterworth, Chebyshev, Cauer, Bessel or any other filter type.<ref name="data">[http://www.cem3374.com/docs/Manuals/datasheets/SSM2040_datasheet.pdf SSM2040 data sheet]</ref> Regarded as one of the best sounding filters, because of the way resonance and small amounts of sof distortion when overdriven, can add harmonics to the original signal.<ref name="jg">''[http://www.siliconbreakdown.com/msl/chip.html The SSM 2040 Integrated Circuit]'', by James Gideon, 2006</ref> |
||
==History == |
|||
Designed by [[Dave Rossum]] of [[E-mu Systems]] and used in the first 2 versions of the [[Sequential Circuits Prophet 5]]. Early SSM chips were often defective, and having to pay royalties led Sequential to switch to [[Curtis Electromusic Specialties|Curtis]] ICs in later versions of the Prophet 5.<ref name="msl">[http://www.siliconbreakdown.com/msl/ssm2040History.html SSM 2040 Voltage Controlled Filter Chip History], Mad Science Lab 2008</ref><ref>[http://www.siliconbreakdown.com/msl/ssm2040manual.html SSM 2040 VCF with LFO], Mad Science Lab 2008</ref> |
|||
== Clones and schematics == |
== Clones and schematics == |
||
| Line 42: | Line 45: | ||
== Further reading == |
== Further reading == |
||
* Circuit for dynamic control of phase shift, [http://www.google.co.uk/patents/US3969682 US Patent US3969682], by David Rossum, 1974 |
* Circuit for dynamic control of phase shift, [http://www.google.co.uk/patents/US3969682 US Patent US3969682], by David Rossum, 1974 |
||
* SSM 2040 data sheet at [http://www.maxmidi.com/diy/ssm/index.html MaxMidi Rare Silicon] |
* SSM 2040 data sheet at [http://www.maxmidi.com/diy/ssm/index.html MaxMidi Rare Silicon], [http://www.cem3374.com/datasheets.htm CEM3374.com] and [http://www.digisound80.co.uk/digisound/other_documents/brochure_files/SSM2040.pdf Digisound80.co.uk] |
||
* Build a better music synthesiser by [[Thomas Henry]], Tab Books Inc, 1987, ISBN 0830627533, Chapter 6: ''A four-pole lowpass VCF - SSM2040'' |
* Build a better music synthesiser by [[Thomas Henry]], Tab Books Inc, 1987, ISBN 0830627533, Chapter 6: ''A four-pole lowpass VCF - SSM2040'' |
||
* ''Electronic Music Circuits'' by Barry Klein, Howard Sams, 1982,ISBN 0-672-21833-X, pages 125-126, 135-137, 141 |
* ''Electronic Music Circuits'' by Barry Klein, Howard Sams, 1982,ISBN 0-672-21833-X, pages 125-126, 135-137, 141 |
||
| Line 54: | Line 57: | ||
* [http://www.homebuilthardware.com/index.php/projects/ssm2040-vcf/ SSM2040 VCF] by Ryan Williams, March 2007. |
* [http://www.homebuilthardware.com/index.php/projects/ssm2040-vcf/ SSM2040 VCF] by Ryan Williams, March 2007. |
||
* [http://hem.bredband.net/bersyn/VCF/vcf-2040+vca.html SSM 2040 style VCF + discrete VCA (AMORE)], 2011. Both circuits by René Schmitz. |
* [http://hem.bredband.net/bersyn/VCF/vcf-2040+vca.html SSM 2040 style VCF + discrete VCA (AMORE)], 2011. Both circuits by René Schmitz. |
||
* [http://www.siliconbreakdown.com/msl/chip.html The SSM 2040 Integrated Circuit], by James Gideon, 2006. Discusses the IC, the ways it can be configured and the discrete version by Jürgen Haible. |
|||
[[Category:Linear integrated circuits]] |
[[Category:Linear integrated circuits]] |
||
Revision as of 20:26, 22 April 2015
The SSM 2040 is a 4-pole filter from SSM. The device's cutoff frequency can be exponentially voltage controlled over a 10,000 to 1 range. It is an extremely flexible circuit building block which can be used in virtually any active filter design including low-pass, high-pass, band-pass and notch. Roll-off characteristics can be selected to be Butterworth, Chebyshev, Cauer, Bessel or any other filter type.[1] Regarded as one of the best sounding filters, because of the way resonance and small amounts of sof distortion when overdriven, can add harmonics to the original signal.[2]
History
Designed by Dave Rossum of E-mu Systems and used in the first 2 versions of the Sequential Circuits Prophet 5. Early SSM chips were often defective, and having to pay royalties led Sequential to switch to Curtis ICs in later versions of the Prophet 5.[3][4]
Clones and schematics
In chronological order:
- discrete SSM2040-style filter by Jürgen Haible, 1997.
- SSM2040 Style 4 pole Filter by Jürgen Haible, 1998. A discrete version that reproduces the original sound. A lot of component selection is needed (matching transistor pairs). The circuit is not a pin for pin replacement, and it has a voltage controlled resonance path added. There'a little error in the drawing: the pnp current mirrors have C and E mixed up.
- SMD SSM 2040 filter by René Schmitz, 1999
- 4-pole VCF by Osamu Hoshuyama, 2002
- The SSM 2040 Integrated Circuit, by James Gideon, 2006
- SSM 2040 style VCF + discrete VCA (AMORE), 2011. Both circuits by René Schmitz.
- Discrete Transistor 2040 SVVCF by Scott Stites, electro-music.com forum, Apr. 2013
Synthesizers etc. using the SSM2040 or clone
- Digisound 80-7
- Division 6 Filtare SEIII
- Hearn Morley HM2040 potted module.
- Mad Science Lab SSM2
- Mattson Mini Modular FV1-B, based on the SSM2040 designed by Jim Patchell
- Radio Junk Box 2040 VCF
- RSF Kobol Expander I
- Sequential Circuits Prophet 5 Rev. 1 & 2
- SMB-1 Project
- SRM Synthesizer Octave Cat
- SSM2040 VCF by Ryan Williams, March 2007.
- Steiner EVI
- Synthesis Technology MOTM-440
- Tiptop Audio Z2040
- VCF/Phase Shifter by Craig Anderton, AMS-100 guitar processor, Device 6, 1979
- Vedic Scapes Model 2040, uses the HM2040
- Voltage Controlled Phase Shifter module by Craig Anderton, AMS-100 guitar processor, Device 4, 1979
 | This article is a stub. You can help the Synth DIY Wiki by expanding it. |
See also
References
- ^ SSM2040 data sheet
- ^ The SSM 2040 Integrated Circuit, by James Gideon, 2006
- ^ SSM 2040 Voltage Controlled Filter Chip History, Mad Science Lab 2008
- ^ SSM 2040 VCF with LFO, Mad Science Lab 2008
Further reading
- Circuit for dynamic control of phase shift, US Patent US3969682, by David Rossum, 1974
- SSM 2040 data sheet at MaxMidi Rare Silicon, CEM3374.com and Digisound80.co.uk
- Build a better music synthesiser by Thomas Henry, Tab Books Inc, 1987, ISBN 0830627533, Chapter 6: A four-pole lowpass VCF - SSM2040
- Electronic Music Circuits by Barry Klein, Howard Sams, 1982,ISBN 0-672-21833-X, pages 125-126, 135-137, 141
- Two ICs For Electronic Music - SSM2020 And SSM2040 by Dave Rossum, Electronotes 78, Volume 9, 1977, p. 15
- Reader's Circuits - VCF With SSM2040 by Rich Ryan, Electronotes 84, Volume 9, 1977, p. 17
- Additional Design Ideas For Voltage-Controlled Filters by Bernie Hutchins, Electronotes 85, Volume 10, 1978, p. 5
- A Fourth Order State-Variable Filter by Bob Chidlaw, Electronotes 99, Volume 11, 1979, p. 3
- Musical Applications of Microprocessors by Hal Chamberlin, Hayden, 1985 ISBN 0-8104-5768-7, pages 218-220, 599, 603
External links
- SSM2040 VCF by Ryan Williams, March 2007.
- SSM 2040 style VCF + discrete VCA (AMORE), 2011. Both circuits by René Schmitz.
- The SSM 2040 Integrated Circuit, by James Gideon, 2006. Discusses the IC, the ways it can be configured and the discrete version by Jürgen Haible.