What kind of IC is this LM337

dwight elvey dkelvey at hotmail.com
Tue Apr 28 08:44:49 CDT 2009




----------------------------------------
> From: steven.alan.canning at verizon.net
> To: cctech at classiccmp.org; cctalk at classiccmp.org
> Subject: Re: What kind of IC is this LM337
> Date: Tue, 28 Apr 2009 01:20:23 -0700
>
> 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
 
 
Hi
 As I said, I knew that. It is the negative
voltage compliment of the LM317.
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
>>>
>>
>> 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
>
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