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In 1988 with the advent of digital technology and software, Doug Curtis broadened his focus beyond synthesizers forming OnChip Systems and did no further design work on music synthesis products, except for occasional consulting for synth manufacturers until his premature death in 2007. Several more patents in his name are assigned for chips designed into various commercial products.<ref name="emwcem"/><ref>[https://web.archive.org/web/20130429124424/http://curtiselectromusic.com/Doug_Curtis.html Doug Curtis], Curtis Electromusic</ref><ref>[https://web.archive.org/web/20171012050739/http://curtiselectromusic.com/Home_Page.html About the Company], Curtis Electromusic</ref>
 
In 2016 OnChip Systems re-released the 3340, in response to [[Coolaudio International LimitedLtd.|Coolaudio's]] [http://www.coolaudio.com/features-page.php?product=V3340D V3340] re-design of the part to the same specifications.<ref>[https://www.facebook.com/curtischips/posts/1173548609342828 Curtis Electromusic Specialties], Facebook, 5 June 2016</ref><ref>[https://ask.audio/articles/curtis-family-speaks-out-against-behringer-synth-clone-plans-using-cem3340 Curtis Family Speaks Out Against Behringer Synth Clone Plans Using CEM3340] by Rounik Sethi, Ask.Audio, 21 Mar 2017</ref>
 
== Clones ==
AS[[Alfa ALFARpar RPARAS]] produces the AS3310,AS33xx AS3320, AS3330, AS3340, AS3345 andequivalent AS3360ICs in DIP and SMDSMT packages.
 
== The designs ==
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== CEM ICs ==
* [[CEM3310]] – [[Envelope generator|Voltage Controlledcontrolled Envelopeenvelope Generatorgenerator]] (VCEG)
* [[CEM3320]] – [[Voltage Controlledcontrolled Filterfilter]] (VCF)
* [[CEM3328]] – DualFour [[Voltagepole Controlledlow Amplifier]]pass VCF
* [[CEM3330]] – Dual Voltagevoltage Controlledcontrolled Amplifieramplifier (VCA)
* [[CEM3335]] – Dual Voltage Controlled AmplifierVCA
* [[CEM3340]] – [[Voltage Controlledcontrolled Oscillatoroscillator]] (VCO)
* [[CEM3345]] – Voltage Controlled OscillatorVCO
* [[CEM3350]] – Dual VC Statestate Variablevariable Filterfilter (VCSVF)
* [[CEM3360]] – Dual VCA
* [[CEM3365]] – Fast Dual [[DAC]] Multipliermultiplier
* [[CEM3372]] - µP Controllablecontrollable Signalsignal Processorprocessor
* [[CEM3374]] – Dual VCO
* [[CEM3378]] – Voltage Controlledcontrolled Signalsignal Processorprocessor, (two-channel [[voltage controlled mixer]], four-pole low-pass VCF, and VCA)
* [[CEM3379]] – Voltage Controlledcontrolled Signalsignal Processorprocessor, (two-channel voltage controlled output pan, four-pole low-pass VCF, and VCA)
* [[CEM3381]] / PDA381 – Dual Lowlow Riserise VCA
* [[CEM3382]] / PDA382 – Dual Lowlow Riserise VCA
* [[CEM3385]] – Dual Lowlow Noisenoise VCF
* [[CEM3387]] – Low Noisenoise voltage controlled Signalsignal Processorprocessor
* [[CEM3389]] – Voltage Controlledcontrolled Signalsignal Processorprocessor
* [[CEM3391]] - µP Controllablecontrollable Dynamicdynamic Signalsignal Processorprocessor
* [[CEM3394]] - µP Controllablecontrollable [[synthesizer voice]]
* [[CEM3396]] - µP Controlledcontrolled [[Waveshaper]]/Filter
* [[CEM5310]] – Hex [[ADSR]] and VCA
* [[CEM5315]] – Quant ADSR and [[Octaveoctave Divider]]
* [[CEM5508]] / PD508 – Octal [[Samplesample & Holdhold]]
* [[CEM5512]] – Octal Doubledouble Bufferedbuffered Samplesample & Holdhold
* [[CEM5510]] – Fast Octaloctal Samplesample & Holdhold, custom-made for Sequentialsequential Circuits
* [[CEM5530]] – 30 Channelchannel Samplesample & Holdhold, custom-made for Sequentialsequential Circuits
* [[CEM5570]] – [[Bus]] Controlledcontrolled Signalsignal Processorprocessor
<ref name="cemds">CEM data sheets</ref><ref name="sch">Various schematics</ref><ref name="cempo">Curtis Electromusic [https://web.archive.org/web/20130502090659/http://curtiselectromusic.com/Product_Overview.html Product Overview]</ref><ref>[http://www.synthtech.com/cem/cemdata.html ''What chip do I have in my synth?''] at www.synthtech.com</ref>
 
== Synthesizers using CEM ICs ==
=== Prebuilt ===
* [[Akai AX-60]] – 6 CEM3394
* [[Akai VX600]] AX-60 12– CEM3374B,6 12x CEM3378CEM3394
* [[Akai AX-80]] – 6 x CEM3372
* Akai VX600 - 12 x CEM3374B, 12 x CEM3378
* [[Behringer Neutron]] - 2 CEM3340
* Behringer Crave - 1 x CEM3340
* Behringer Neutron - 2 x CEM3340
* Buchla 296e – 1 x CEM3360
* Cheetah MS6 – 6 x CEM3396
* Crumar Bit 99 – 6 x CEM3328
* Crumar Bit One – 6 x CEM3328 in late models
* Crumar Composer – 2 x CEM3310, 2 x CEM3320, 2 x CEM3330
* Crumar Spirit – 2 x CEM3340, 2 x CEM3350, 3 x CEM3360
* Crumar Stratus – 6 x CEM3310, 6 x CEM3320, 6 x CEM3330
* Crumar Trilogy – 6 x CEM3310, 6 x CEM3320, 6 x CEM3330
* Doepfer A-106-6 XP Filter - CEM3379
* Doepfer A-107 Multitype Morphing Filter - CEM3379
* Doepfer A-109 Voltage Controlled Signal Processor - CEM3379
* Doepfer A-111-1 High-End VCO - CEM3340
* Doepfer A-111-2 High End VCO II/VCLFO - CEM3340
* Doepfer A-111-3 Micro Precision VCO - CEM3340
* Doepfer A-111-4 Quad Precision VCO - CEM3340
* Doepfer A-111-5 Synthesizer Voice - CEM3394
* Doepfer A-121 Multimode Filter - CEM3320
* Doepfer A-122 24dB Curtis Low Pass Filter - CEM3320, CEM3379 in later versions
* Doepfer A-123 24dB High Pass - CEM3320
* Doepfer A-124 Wasp Filter - CEM3379
* Doepfer A-126 Voltage Controlled Frequency Shifter - CEM3382
* Doepfer A-130 Voltage Controlled Amplifier - CEM3381 in earlier models, alternately CEM3382
* Doepfer A-131 Voltage Controlled Amplifier - CEM3381 in earlier models, alternately CEM3382
* Doepfer A-132-3 Dual linear/exponential VCA - CEM3360 (early versions)
* Doepfer A-134-1 Voltage Controlled Panner/Crossfader - CEM3381
* Doepfer A-179 Light Controlled Voltage Source - CEM3320
* Doepfer Dark Energy - CEM3394 (original model)
* Dynacord Add-one - 8 x CEM3389
* [[EH-30 Modular]] – 2 x CEM3310, 4 x CEM3330, 4 x CEM3340
* Elka Synthex – 8 x CEM3320
* Elka EK-22 – 6 x CEM3396
* Ensoniq ESQ-1 – 1 x CEM3360, 8 x CEM3379
* Ensoniq ESQ-2 – 1 x CEM3360
* Ensoniq Mirage – 8 x CEM3328
* Ensoniq SDP-1 - 10 x CEM3328
* Ensoniq SQ-80 – 1 x CEM3360, 8 x CEM3379
* Ensoniq SQ-81 – 1 x CEM3360
* Fairlight CMI II – 8 x CEM3320, in earlier versions
* Fender/Rhodes Chroma – 8 x CEM3350, 8 x CEM3360
* Fender/Rhodes Polaris – 6 x CEM3372, 6 x CEM3374
* Forat F9000 – 4 x CEM3320
* Hyperflange + Chorus by Craig Anderton - 1 x CEM3340
* Hohner PK150 - 1 x CEM3391
* Hohner PK250 - 2 x CEM3391
* Keytek CTS-2000 – 8 x CEM3389, 1 x CEM5530
* Kurzweil K250 – 8 x CEM3335
* Linndrum – 2 x CEM3320, 1 x CEM3360
* Linn 9000 – 4 x CEM3320
* Marion Systems MSR-2 - CEM3397
* Marion Systems MS9C - 8 3387
* [[Moog Memorymoog]] – 12 x CEM3310, 19 x CEM3340, 26 x CEM3360
* Mutronics Mutator
* Oberheim DX – 3 x CEM3320
* Oberheim DMX – 1 x CEM3320, or CEM3350 depending upon the voice card
* Oberheim Matrix 6 & 6R – 6 x CEM3396
* Oberheim Matrix 12 – 12 x CEM3374, 12 x CEM3372
* Oberheim Matrix 1000 – 6 x CEM3396
* [[Oberheim OB-1]] – 2 x CEM3310
* [[Oberheim OB-8]] – 16 x CEM3310, 16 x CEM3320, 16 x CEM3340, 2 x CEM3360
* Oberheim OB-SX – 2 x CEM3310, 1 x CEM3320, 2 x CEM3340, 1 x CEM3360 per voice
* Oberheim OB-X – 2 x CEM3310
* Oberheim OB-Xa – 16 x CEM3310, 8 x CEM3320, 16 x CEM3340, 2 x CEM3360
* Oberheim Prommer – 1 x CEM3328<!-- or 3320?-->
* Oberheim Xpander – 6 x CEM3372, 6 x CEM3374
* Octave Plateau Voyetra 8 – 16 x CEM3340
* Octave The Cat SRM II – CEM3340
* JLCooper Oberheim filter mod – per voice: 1 x CEM3320
* Polyfusion Series 2000 Synthesizer - 3340 revision D only, revision A and B are based on the μA726 and XR2207
* [[PPG Wave|PPG Wave 2.0]] – 4 x CEM3310, 4 x CEM3320
* [[PPG Wave|PPG Wave, 2.2 and 2.3]] – 4 x CEM3360
* Rhodes Chroma – 8 x CEM3350, 8 x CEM3360 (some versions have 9)
* Rhodes Polaris – 6 x CEM3372, 6 x CEM3374
* Roland Jupiter 6 – 12 x CEM3340, 6 x CEM3360
* Roland Jupiter 8/MKS-80 to serial #511799 (early models) – 8 x CEM3340, 4 x CEM3360
* Roland Jupiter 8/MKS-80 serial #511800 up (later models) – 4 x CEM3360
* Roland MKS-20 – 5 x CEM3360
* Roland Roland MC202 – 1 x CEM3340
* Roland Roland SH101 – 1 x CEM3340
* Sequential Circuits Drumtraks – 2 x CEM3320
* Sequential Circuits Max – 6 x CEM3394
* Sequential Circuits Multi-Trak – 6 x CEM3394
* Sequential Circuits Pro One – 2 x CEM3310, 1 x CEM3320, 3 x CEM3340
* Sequential Circuits Prophet 10 – 20 x CEM3310, 10 x CEM3320, 22 x CEM3340
* Sequential Circuits Prophet 2000 – 8 x CEM3379
* Sequential Circuits Prophet 3000 – CEM3387
* [[Sequential Circuits Prophet-5]], Rev 3 – 10 CEM3310, 5 x CEM3320, 11 x CEM3340
* Sequential Circuits Prophet 600 – 12 x CEM3340, 4 x CEM3360, 6 x CEM3372
* Sequential Circuits Six-Trax – 6 x CEM3394
* Sequential Circuits Split8 – 8 x CEM3394
* Sequential Circuits Studio 440 – 1 x CEM3360, 8 x CEM3389, 1 x CEM5530
* Sequential Circuits T8 – 16 x CEM3340, 8 x CEM3372
* Sequential Circuits VS – 8 x CEM3378/3379, 4 x CEM3360, 2 x CEM3365, 4 x CEM5510, 2 x CEM5530
* Simmons SDS1000 – 3 x CEM3394
* Simmons SDS200 - 2 x CEM3394
* Simmons SDS400 - 4 x CEM3394
* Simmons SDS7 – – per module: 1 x CEM3340, 1 x CEM3372
* Simmons SDS8 – 5 x CEM3372
* Simmons SDS800 – 4 x CEM3394
* Simmons SDS9 – 1 x CEM3372, 3 x CEM3394
* Solton Programmer 24 - 1 x CEM3350
* Solton TS3 - 3 x CEM3360
* Solton TS4 - 1 x CEM3360
* Steiner EVI – 1 x CEM3340, 1 SSM2040
* Syntec Banana – 12 x CEM3310, 12 x CEM3340, 12 x CEM3360
* Synton Synrix – 2 x CEM3310, 2 x CEM3340, 2 x CEM3350, 1 x CEM3360
* Voyetra 8 - 16 x CEM3340
* Waldorf Microwave1 revision A – 8 x CEM3389
* Waldorf Microwave1 revision B – 8 x CEM3387
* Waldorf Wave – 16 x CEM3387
 
=== DIY projects ===
* [[Böhm Soundlab]] – CEM3310, CEM3320, CEM3330, CEM3340
* Deckard's Dream - 17 x CEM3340
* [[Buchla 296e]] – 1 CEM3360
* [[CheetahDigisound MS6]]80-10 – 61 CEM3396x CEM3310
* Digisound 80-16 – 1 x CEM3350
* [[Crumar Bit 01]] – 6 CEM3328 in late models
* [[CrumarDigisound Composer]]80-18 – 21 x CEM3310, 2 CEM3320, 2 CEM3330
* [[CrumarDigisound Spirit]]80-19 – 21 CEM3340, 2 CEM3350, 3x CEM3360
* Digisound 80-2 – 1 x CEM3340
* [[Stratus]] – 6 CEM3310, 6 CEM3320, 6 CEM3330
* Digisound 80-21 – 1 x CEM3340
* [[Crumar Trilogy]] – 6 CEM3310, 6 CEM3320, 6 CEM3330
* Digisound 80-3 – 1 x CEM3340
* [[Deckard's Dream]] - 17 CEM3340
* [[Digisound 80-10]]4 – 13 CEM3310x CEM3330
* [[Digisound 80-16]]6 – 1 CEM3350x CEM3320
* [[Digisound 80-18]]7A – 1 CEM3310x CEM3320, 1 x CEM3335
* [[Digisound 80-19]]9 – 1 CEM3360x CEM3330
* [[Digisound 80-2]]C9 – 12 x CEM3310, 2 x CEM3340, 1 x CEM3360, 1 x CEM3372
* [[Digisound 80 Dev-21]]91 – 1 CEM3340x CEM3391
* Dusk work Self-Tuning VCO - 1 x AS3340
* [[Digisound 80-3]] – 1 CEM3340
* [[DigisoundE&MM 80-4Spectrum Synthesizer]] – 32 x CEM3310, 1 x CEM3320, 2 x CEM3330, 2 x CEM3340
* [[DigisoundElektor 80-6new synthesiser]] –- 2 x CEM3310, 1 x CEM3320, 2 x CEM3340
* [[DigisoundElektor 80-7Apolyphonic synthesiser]] –- per voice: 2 x CEM3310, 1 x CEM3320, 1 CEM3335or 2 x CEM3340
* Juergen Haible Dual VCO - 2 x CEM3340
* [[Digisound 80-9]] – 1 CEM3330
* [[DigisoundKijimi 80-C9]] –16 2x CEM3310AS3340, 224 CEM3340, 1x CEM3360, 1 CEM3372
* [[DigisoundMIDIbox 80 Dev-91]]3396 – 1 CEM3391CEM3396
* [[PAiA Proteus 1]] – 1 x CEM3310, 1 x CEM3320, 1 x CEM3330, 2 x CEM3340
* [[Doepfer A-106-6 XP Filter]] - CEM3379
* PAIA EKx-40 VCO - 1 x CEM3340
* [[Doepfer A-107 Multitype Morphing Filter]] - CEM3379
* [[Powertran Transcendent polysynth]] - per voice: 2 x CEM3310, 2 x CEM3340
* [[Doepfer A-109 Voltage Controlled Signal Processor]] - CEM3379
* Thomas Henry Deluxe VCO – CEM3340<ref name="th">Build a better music synthesiser by Thomas Henry, Tab Books Inc, 1987, {{ISBN|0830627553}}</ref>
* [[Doepfer A-111-1 High-End VCO]] - CEM3340
* [[Doepfer A-111-2 High End VCO II/VCLFO]] - CEM3340
* [[Doepfer A-111-3 Micro Precision VCO]] - CEM3340
* [[Doepfer A-111-4 Quad Precision VCO]] - CEM3340
* [[Doepfer A-111-5 Synthesizer Voice]] - CEM3394
* [[Doepfer A-121 Multimode Filter]] - CEM3320
* [[Doepfer A-122 24dB Curtis Low Pass Filter]] - CEM3320, CEM3379 in later versions
* [[Doepfer A-123 24dB High Pass]] - CEM3320
* [[Doepfer A-124 Wasp Filter]] - CEM3379
* [[Doepfer A-126 Voltage Controlled Frequency Shifter]] - CEM3382
* [[Doepfer A-130 Voltage Controlled Amplifier]] - CEM3381 in earlier models, alternately CEM3382
* [[Doepfer A-131 Voltage Controlled Amplifier]] - CEM3381 in earlier models, alternately CEM3382
* [[Doepfer A-132-3 Dual linear/exponential VCA]] - CEM3360 (early versions)
* [[Doepfer A-134-1 Voltage Controlled Panner/Crossfader]] - CEM3381
* [[Doepfer A-179 Light Controlled Voltage Source]] - CEM3320
* [[Doepfer Dark Energy]] - CEM3394 (original model)
* [[E&MM Spectrum Synthesizer]] – 2 CEM3310, 1 CEM3320, 2 CEM3330, 3 CEM3340
* [[EH-30 Modular]] – 2 CEM3310, 4 CEM3330, 4 CEM3340
* [[Elka Synthex]] – 8 CEM3320
* [[Elka EK-22]] – 6 CEM3396
* [[Ensoniq ESQ1]] – 1 CEM3360, 8 CEM3379
* [[Ensoniq ESQ2]] – 1 CEM3360
* [[Ensoniq Mirage]] – 8 CEM3328
* [[Ensoniq SDP-1]] - 10 CEM3328
* [[Ensoniq SQ-80]] – 1 CEM3360, 8 CEM3379
* [[Ensoniq SQ-81]] – 1 CEM3360
* [[Fairlight CMI II]] – 8 CEM3320, in earlier versions
* [[Fender/Rhodes Chroma]] – 8 CEM3350, 8 CEM3360
* [[Fender/Rhodes Polaris]] – 6 CEM3372, 6 CEM3374
* [[Forat F9000]] – 4 CEM3320
* [[Hyperflange + Chorus]] by Craig Anderton - 1 CEM3340
* [[Hohner PK150]] - 1 CEM3391
* [[Hohner PK250]] - 2 CEM3391
* [[Juergen Haible Dual VCO]] - 2 CEM3340
* [[Keytek CTS-2000]] – 8 CEM3389, 1 CEM5530
* [[Kurzweil K250]] – 8 CEM3335
* [[Linndrum]] – 2 CEM3320, 1 CEM3360
* [[Linn 9000]] – 4 CEM3320
* [[Marion Systems MSR-2]] - CEM3397
* [[MIDIbox 3396]] – CEM3396
* [[Moog Memorymoog]] – 12 CEM3310, 19 CEM3340, 26 CEM3360
* [[Mutronics Mutator]]
* [[Oberheim DX]] – 3 CEM3328
* [[Oberheim DMX]] – 1 CEM3320, or CEM3350 depending upon the voice card
* [[Oberheim Martix 6|Oberheim Martix 6 & 6R]] – 6 CEM3396
* [[Oberheim Matrix 12]] – 12 CEM3374, 12 CEM3372
* [[Oberheim Matrix 1000]] – 6 CEM3396
* [[Oberheim OB-1]] – 2 CEM3310
* [[Oberheim OB-8]] – 16 CEM3310, 16 CEM3320, 16 CEM3340, 2 CEM3360
* [[Oberheim OB-SX]] – 2 CEM3310, 1 CEM3320, 2 CEM3340, 1 CEM3360 per [[voice]]
* [[Oberheim OB-X]] – 2 CEM3310
* [[Oberheim OB-Xa]] – 16 CEM3310, 8 CEM3320, 16 CEM3340, 2 CEM3360
* [[Oberheim Prommer]] – 1 CEM3328
* [[Oberheim Xpander]] – 6 CEM3372, 6 CEM3374
* [[Octave Plateau Voyetra 8]] – 16 CEM3340
* [[Octave The Cat SRM II]] – CEM3340
* [[JLCooper filter mod|Oberheim JLCooper filter mod]] – 1 CEM3320 per voice
* [[Paia Proteus]] – 1 CEM3310, 1 CEM3320, 1 CEM3330, 2 CEM3340
* [[PAIA EKx-40 VCO]] - 1 CEM3340
* [[Powertran Transcendent Polysynth]] – 2 CEM3310 per voice, 2 CEM3340 per voice
* [[PPG Wave|PPG Wave 2.0]] – 4 CEM3310, 4 CEM3320
* [[PPG Wave|PPG Wave, 2.2 and 2.3]] – 4 CEM3360
* [[Rhodes Chroma]] – 8 CEM3350, 8 CEM3360 (some versions have 9)
* [[Rhodes Polaris]] – 6 CEM3372, 6 CEM3374
* [[Roland Jupiter 6]] – 12 CEM3340, 6 CEM3360
* [[Roland Jupiter 8|Roland Jupiter 8/MKS-80]] to serial #511799 (early models) – 8 CEM3340, 4 CEM3360
* Roland Jupiter 8/MKS-80 serial #511800 up (later models) – 4 CEM3360
* [[Roland MKS-20]] – 5 CEM3360
* [[Roland Roland MC202]] – 1 CEM3340
* [[Roland Roland SH101]] – 1 CEM3340
* [[Sequential Circuits Drumtraks]] – 2 CEM3320
* [[Sequential Circuits Max]] – 6 CEM3394
* [[Sequential Circuits Multi-Trak]] – 6 CEM3394
* [[Sequential Circuits Pro One]] – 2 CEM3310, 1 CEM3320, 3 CEM3340
* [[Sequential Circuits Prophet 10]] – 20 CEM3310, 10 CEM3320, 22 CEM3340
* [[Sequential Circuits Prophet 2000]] – 8 CEM3379
* [[Sequential Circuits Prophet 3000]] – CEM3387
* [[Sequential Circuits Prophet-5]], Rev 3 – 10 CEM3310, 5 CEM3320, 11 CEM3340
* [[Sequential Circuits Prophet 600]] – 12 CEM3340, 4 CEM3360, 6 CEM3372
* [[Sequential Circuits Six-Trax]] – 6 CEM3394
* [[Sequential Circuits Split8]] – 8 CEM3394
* [[Sequential Circuits Studio 440]] – 1 CEM3360, 8 CEM3389, 1 CEM5530
* [[Sequential Circuits T8]] – 16 CEM3340, 8 CEM3372
* [[Sequential Circuits VS]] – 8 CEM3378/3379, 4 CEM3360, 2 CEM3365, 4 CEM5510, 2 CEM5530
* [[Simmons SDS1000]] – 3 CEM3394
* [[Simmons SDS200]] - 2 CEM3394
* [[Simmons SDS400]] - 4 CEM3394
* [[Simmons SDS7]] – 1 CEM3340 per module, 1 CEM3372 per module
* [[Simmons SDS8]] – 5 CEM3372
* [[Simmons SDS800]] – 4 CEM3394
* [[Simmons SDS9]] – 3 CEM3394
* [[Solton Programmer 24]] 1 CEM3350
* [[Steiner EVI]] – 1 CEM3340, 1 SSM2040
* [[Syntec Banana]] – 12 CEM3310, 12 CEM3340, 12 CEM3360
* [[Synton Synrix]] – 2 CEM3310, 2 CEM3340, 2 CEM3350, 1 CEM3360
* [[Thomas Henry]]: Deluxe VCO – CEM3340<ref name="th">Build a better music synthesiser by Thomas Henry, Tab Books Inc, 1987, ISBN 0-8306-2753-3</ref>
* Thomas Henry: A dual VCA – CEM3330<ref name="th" />
* [[Waldorf Microwave1 revision A]] – 8 CEM3389
* [[Waldorf Microwave1 revision B]] – 8 CEM3387
* [[Waldorf Wave]] – 16 CEM3387
<ref name="sch" /><ref name="cemci">Curtis Electromusic [https://web.archive.org/web/20130502132536/http://curtiselectromusic.com/Customers_and_Instruments.html Customers and Instruments]</ref><ref name="sd">[http://www.sequencer.de/specials/synthesizer_chip.html Synthesizer Database] by Moogulator</ref><ref name="pp">[http://patchpierre.blogspot.co.uk/2012/02/cem-chips-in-doepfer-modules.html CEM chips in Doepfer Modules] by Pierre Serné, 28 Feb. 2012</ref><ref>[http://www.midibox.org/dokuwiki/doku.php?id=midibox_3396 MIDIbox 3396]</ref><ref>[http://www.digisound80.co.uk/digisound/modules/modules.htm Digisound 80 Synthesizer Modules]</ref><ref>Wikipedia:[https://en.wikipedia.org/wiki/CEM_and_SSM_chips_in_synthesizers CEM and SSM chips in synthesizers]</ref>
 
== See also ==
* [[Solid State Micro Technology Forfor Music]]
* [[Alfa Rpar AS]]
 
== References ==
{{reflist}}
 
== Further reading ==
* ''[https://archive.org/details/ElektorMagazine/Elektor%5Bnonlinear.ir%5D%201981-10/page/n19/mode/1up Synthesiser IC's]'' by H. P. Baumann, Elektor 078, Oct 1981, pp. 10-18
* ''Electronic Music Circuits'' by Barry Klein, Howard Sams, 1982, {{ISBN|067221833X}}
 
== External links ==
* [https://web.archive.org/web/20080124170117/http://curtiselectromusic.com/ Curtis Electromusic] - archived
* [http://www.alfarzpp.lv/eng/sc/application.php Alfa application specific ICs]
* [http://retrosynthads.blogspot.co.uk/2011/07/curtis-electromusic-specialties-what.html What a Difference a Chip Makes] a quarter page advertisement in Contemporary Keyboard, February 1980
* [http://synth.stromeko.net/DIY.html#CEMpics Pictures of dead CEM chips] at Stromeko Synth World
* [http://www.aes.org/e-lib/browse.cfm?elib=2639 A Monolithic Voltage-Controlled Amplifier Employing Log-Antilog Techniques], by Douglas R Curtis, JAES Volume 24 Issue 2 pp. 93-102, March 1976
* [http://ssmcurtis.com/ SSM & Curtis Chips –Synth's Inside outOut]
* About the CEM3340 - [http://www.muzines.co.uk/articles/ics-for-electro-music/2561 ICs for Electro-Music (Part 1)] by Charles Blakey, Electronics & Music Maker, March 1981
* About the CEM3320, CEM3330 and CEM3310 - [http://www.muzines.co.uk/articles/ics-for-electro-music/2596 ICs for Electro-Music (Part 2)] by Charles Blakey, Electronics & Music Maker, April 1981
* [https://gearspace.com/board/electronic-music-instruments-and-electronic-music-production/1016749-cem-curtis-love-thread.html CEM (Curtis) Love Thread], Gearspace.com, Jul 2015
 
== YouTube ==
* [https://youtu.be/rslPZYUMQMw New vs. old Curtis CEM3340 rev G comparison]
=== Data sheets ===
[http://www.sdiy.info/wiki/File:CEM3310_datasheet.pdf CEM3310], [http://www.sdiy.info/wiki/File:CEM3310_datasheet_long.pdf CEM3310 long],[http://www.sdiy.info/wiki/File:CEM3312_datasheet.pdf CEM3312], [http://www.sdiy.info/wiki/File:CEM3320_datasheet.pdf CEM3320], [http://www.sdiy.info/wiki/File:CEM3320_datasheet_long.pdf CEM3320 long], [http://www.sdiy.info/wiki/File:CEM3328_datasheet.pdf CEM3328], [http://www.sdiy.info/wiki/File:CEM3330_datasheet.pdf CEM3330], [http://www.sdiy.info/wiki/File:CEM_3330CEM3330-3335_long.pdf CEM_3330-3335 long], [http://www.sdiy.info/wiki/File:CEM3340_datasheet.pdf CEM3340], [http://www.sdiy.info/wiki/File:CEM3340-3345_long.pdf CEM_3340-3345 long], [http://www.sdiy.info/wiki/File:CEM3350_datasheet.pdf CEM3350], [http://www.sdiy.info/wiki/File:CEM3360_datasheet.pdf CEM3360], [http://www.sdiy.info/wiki/File:CEM3365_datasheet.pdf CEM3365], [http://www.sdiy.info/wiki/File:CEM3371_datasheet.pdf CEM3371], [http://www.sdiy.info/wiki/File:CEM3372_datasheet.pdf CEM3372], [http://www.sdiy.info/wiki/File:CEM3374_datasheet.pdf CEM3374], [http://www.sdiy.info/wiki/File:CEM3378_datasheet.pdf CEM3378], [http://www.sdiy.info/wiki/File:CEM3381_datasheet.pdf CEM3381], [http://www.sdiy.info/wiki/File:CEM3389_datasheet.pdf CEM3389], [http://www.sdiy.info/wiki/File:CEM3391_datasheet.pdf CEM3391], [http://www.sdiy.info/wiki/File:CEM3394_datasheet.pdf CEM3394], [http://www.sdiy.info/wiki/File:CEM3396_datasheet.pdf CEM3396], [http://www.sdiy.info/wiki/File:CEM5508_datasheet.pdf CEM5508], [http://www.sdiy.info/wiki/File:CEM5530_datasheet.pdf CEM5530]<br />Some are also freely available from:
<br/>Some are also freely available from [http://www.synfo.nl/pages/datasheets.html Synfo.nl]
* [https://web.archive.org/web/20130502090659/http://curtiselectromusic.com/Product_Overview.html Curtis Electromusic]
* [http://synfo.nl/ Synfo.nl]
 
[[Category:Linear ICs]]
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