28 Apr
2009
28 Apr
'09
1:20 a.m.
Dwight,
The LM337 is a 3-terminal negative adjustable regulator. It
supplies in excess of 1.5A over an output voltage range of
-1.2V to - 37V. This regulator requires only two external
resistor to set the output voltage. Included on the chip are
current limiting, thermal overload protection and safe area
compensation.
Best regards, Steven
----------------------------------------
Saw this in the news today:
Departure of chip-design legend Bob Pease prompts outpouring in valley
http://www.mercurynews.com/ci_12167632
Hi
I found it interesting but I do know what a LM337 is.
I've had the honor to have lunch with Bob once.
Dwight
Date: Mon, 27 Apr 2009 12:44:18 -0700
Subject: Re: What kind of IC is this
From: glen.slick at gmail.com
To: cctalk at classiccmp.org
On Thu, Jan 8, 2009 at 10:26 AM, Jim Battle wrote:
> Philip Pemberton wrote:
>>
>> Roy J. Tellason wrote:
>>>
>>> "One of the celebrated things Widlar did was to put a
"hassler" in his
>>> office.2 When a person came in to his office and spoke loudly, this
circuit
>>> would detect the audio, convert the audio
to a very high audio
frequency,
>>> and play back this converted sound.
>>
>> [snip]
>>>
>>> I *want* one of these...!
>>
>> It was published in Electronic Design magazine:
>>
>> "What's All This Hassler Stuff, Anyhow?" (Pease Porridge)
>> Pease, Bob
>> Electronic Design, May 15, 1995
>>
>> I've got a (signed!) copy of the article here. Five op-amps (1x LMC6484,
>> LM837 or similar + 1x LM301A), two transistors (jellybeans), a handful
of
Rs
>> and Cs, half a dozen 1N914 diodes, a tweeter
(Radioshack 40-1383 or
similar
>> -- 2x6" piezo horn tweeter) and a
microphone (Radioshack 270-090 or
similar
-- basically a cheap PCB-mount electret element).
http://electronicdesign.com/Globals/PlanetEE/Content/3080.html