ODP: Saw to triangle problem - NOT ANYMORE :)

[Tadej Bozicko]

Roman Sowa wrote:
>
>Hi all!

>Why do always simple tasks are done the hard way?
>What would you say about 2 opamps, 2 resistors and 1 diode design?
>And very old one too...

>imagine standard inverting amplifier with gain = -1.
>insert diode between opamp's output and feedback resistor.
>anode toward opamp if you want positive output, or cathode otherwise.
>use second opamp as a follower connected to the diode-resistor node.
>voila!

>Roman

Hi again!

There is no problem in being simple. Many other designs are simple but they all suffer from rounded peak of the triangle. This drove me crazy so I didn't wanna simple anymore. Btw: Whats 2 or 3 resistors more in a circuit? They are ultra cheap anyway and the take almost no space (you can always use SMT resistors, if the space is a problem).


Tadej Bozicko
E-Mail   : tadej.bozicko at uni-mb.si
WWW  : http://imola.uni-mb.si/~bozicko
WWW2: http://www.uni-mb.si/~uelelt68b

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