Re: question about amplifier with diff in

From: Jim Thompson (thegreatone_at_example.com)
Date: 09/14/04


Date: Tue, 14 Sep 2004 13:30:01 -0700

On 14 Sep 2004 20:23:10 GMT, cfoley1064@aol.com (CFoley1064) wrote:

>>Subject: question about amplifier with diff in
>>From: "Vexator" vexator_nospam@inwind.it
>>Date: 9/14/2004 1:59 PM Central Daylight Time
>>Message-id: <GcH1d.2919$2T6.81684@twister1.libero.it>
>>
>>Hi all,
>>
>>I've a stupid question, an amplifier with differential input and
>>single-ended output, could be this?
>>
>> Vcc
>> |
>> |
>> |
>> |/
>> IN -----------|
>> |>
>> |
>> |
>> .-.
>> | |
>> | |
>> '-'
>> |
>> ------------ OUT
>> .-.
>> | |
>> | |
>> '-'
>> |
>> |
>> |<
>> IN ------------|
>> |\
>> |
>> |
>> |
>> GND
>>created by Andy´s ASCII-Circuit v1.25.250804 www.tech-chat.de
>>
>>Best regards.
>>
>>--
>>MEMENTO AVDERE SEMPER
>>Giovanni (Italy)
>>
>
>Hello again. Close, but not quite. Try using a differential pair with current
>mirror setup -- six transistors instead of two, but quite a bit better. Here's
>a web tutorial that looks like it covers it pretty well (I haven't proofed it,
>but you'll get the idea.
>
>http://www.allaboutcircuits.com/vol_6/chpt_5/17.html
>
>This is actually the basis for the op amp.
>
>Good luck
>Chris

Chris provided a pretty good reference.

See also "MC1530-TeachingExercise.pdf" on the SED/Schematics page of
my website.

                                        ...Jim Thompson

-- 
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.


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