Ladder waveform generator

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meep

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Hi

Im looking for a Ladder waveform ckt that can be interfaced with a microntroller. Ive seen a MCU with a DAC and it can supply a ladder waveform as an output and the user can vary the frequency to his liking. So my question is, Is there any other way of doing this without using a DAC :?:

thank u
 

Ladder - do you mean a waveform that looks like stairs?

You could feed several short current pulses into a capacitor. Then another pulse that somehow discharges the capacitor.
 

cn i make its output look like this?
 

Well the ancient CMOS technique basically was to make a counter and to tight the outputs to resistors that add in a point ..Well this comes down to making a home made DAC .A Dac you know! is not a COMPLICATED circuit .
 

so it basically falls down to an R-2R network?
 

Ten positive current pulses into a capacitor, then ten negative current pulses, and you get that voltage waveform. No DAC required.

Is there some reason that you don't wan't to use a DAC?
 

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