Usefull parts for do it yourself Synthesizers

Updated: 8-7-00
 
Analog Parts
Part Status Where
CA3080-Operational tranconductance amplifier.  Useful as gain control element in VCA, VCF, VCO, ADSR, etc Harris-unknown Jameco
JDR
Digikey
CA3280-Dual operational transconductance amplifier.  Same as CA3080 but has linearization network Harris-Currently Manufactured Digikey
LM13600-Dual operational transconductance amplifer.  Same as CA3080 but has linearization diodes and darlington follower buffer. National Semiconductor
Life time buy. These are getting hard to find.
Mouser
LM13700-Same as LM13600, bias control does not affect buffer National Semiconductor
Currently Manufactured
Digikey
CA3046-5 matched NPN transistors good for exponential converters and diff amps. Harris
Currently Manufacutred
Jameco
JDR
CA3096A-three matched NPN and two matchedd PNP transistors.  Good for making OTA's and Current Switches Harris
Currently Manufactured
Digikey
CA3096-Same as above, but transistors not so tightly matched Harris
Unknown
Jameco
JDR
DG201-Quad SPST CMOS analog switch. Harris, Siliconix
Currently Manufactured
JDR
DG211-Quad SPST CMOS analog switch Siliconix
Currently Manufactured
JDR
CA3140-MOSFET input single opamp.  Usefull in aplications that require minimum input bias current Harris
Currently Manufactured
Jameco
JDR
Digikey
TL07x-Single,Dual,Quad JFET input amplifier.  Fairly low noise, low distortion 3.5MHz opamp TI
Currently Manufactured
Jameco
JDR
TL08x-Same as TL074, not as quiet, distortion a little higher. TI
Currently Manufactured
Jameco
JDR
LF347-Sort of like the TL084 National Semiconductor
Currently Manufactured
Jameco
JDR
Digikey
LM336-2.5--Voltage reference.  Good for making relatively stable voltage reference for many things.  Like a zener. National Semiconductor
Currently Manufactured
Jameco
JDR
Digikey
LM1496-Balanced Modulator, many uses, this part is wide band as well Motorola,National Semiconductor
Unknown
Jameco
JDR
LM311-Comparator-Medium performance. National Semiconductor
Unknown
Jameco
JDR
Digikey
LM319-Dual Comparator-slightly higher performance than LM311 National Semiconductor
Unknown
Jameco
JDR
Digikey
H11F1 ,H11F2 ,H11F3 opto coupled fet, usefull as controlled resistor. Optoelectronics Digikey
Mouser
Techamerica
LM398-Sample and hold National Semiconductor Digikey
MAT04 Quad Matched NPN
Good for exponetial converters. Low
Rbe (emitter bulk resistance)
Analog Devices No good sources known
THAT100 Quad Matched NPN
Low noise, Moderate Bulk emmiter resistance.
THAT CORPORATION No good sources known
THAT120 Quad Matched PNP
Low noise, Moderate Bulk emmiter resistance.  Exponential converters.
THAT Corporation No good sources known
THAT140 Dual NPN/PNP pair.  Good for OTA, low noise. THAT Corporation No good sources known.
OPA2130
OPA134
OPA604
OPA2604
Burr Brown Opamps I believe.  According to Jules Rychebusch, "Fantasitc Opamps".  Probably good for aps that need a little more.  Don't know specifics on any of these. Digikey
J108 Siliconix JFET.  Ron= 8 ohms
N Channel

J111 Siliconix JFET Ron=30ohms N Channel.  This part is equivelent to the 2n4391 and is a lot cheaper Future Active
J174 Siliconix JFET Ron=85 ohms P Channel Future Active
Digital IC's
68008--32 bit internal, 8 bit bus microprocessor Motorola
No longer availiable
not anywhere
68hc11a1p- 8 bit uP, 8 analog ins, external rom/ram Motorola
Currently manufactured
Jameco
JDR
68EC000 -32 bit internal 8/16 bit bus microprocessor Motorola
Currently manufacuted
unknown
6502 - 8 bit uP, used at one time in Apple ][, C64, Atari 800 Rockwell, Synertek, MOS
no longer manufactured
Jameco
JDR
XC4010E-field programable gate array, 10000 gates, dual port ram, etc Xilinx
Currently manufactured
Digikey
AT90S8515 8 bit microcomputer Atmel AVR Flash programable Digikey













 
Passive Components
Q81K +3300ppm resistor Tel Labs
This company is long gone

Polystyrene Capacitors ?
Rumor has it that these are getting harder and harder to find
Mouser
Metal Film Resistors, 1% +/-100ppm Many
They are everywhere
Mouser
Digikey









    This is only a partial list, I am sure.  Also, I can only list places I have actually purchased parts from.  Since I live in the USA, that sort of explains the bias towards US based suppliers.  If you know of a supplier for various parts listed, send me an e-mail and I will add it.  Also, if you think other parts should be added to this list, send me email.  Hopefully, all will find this list useful.

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