[sdiy] Some more electronics history

[Oren Leavitt]

I'm not too keen on the history of ICs but I do know that IC op amps and logic ICs have been around since the early 1960s.
Fairchild introduced the uA702 IC op amp in 1963, and later, the uA709 in 1965 and the uA741 in 1968. The 709 and 741 are still made today.
National Semiconductor introduced the LM101 in 1967.
Texas Instruments developed the first IC "Solid Circuit" in 1958.
LEDs became commercially available in the late 1960s.
The CA3080 OTA came out in 1969 I think...

Oren

-----Original Message-----
From: ChristianH <chris at scp.de>
Sent: Feb 3, 2004 3:47 AM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] Some more electronics history

Hi,

all this historical talk about the 3900 and its first use in synths made
me wonder - do any members of the O.F.F. (aka Old Fart Fraction :-)
remember introduction years for some key technologies, like operational
amplifiers, OTAs, 4000 CMOS logic, or - gulp - BBDs? 
When did e.g. the state variable circuit pop up for the first time? Or
something simple as LED technology, and there's probably some more that
we take for granted now, but that simply hasn't been around only a few
decades ago...

Do those inventions date back to the 60s, or did it all happen in the
early 70s?

Christian