help for circuit on 10mV step size increase in output periodivally

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So, you want to make a staircase ramp?

It's pretty simple: use a low-duty-cycle pulse generator into an integrator. For low frequency, that'd be a '555 feeding an op amp through a resistor to (-), with a feedback capacitor to (-), and some provision to reset the capacitor to zero to start another staircase.

At high frequency, take a square wave generator with nearer 50% duty cycle... feed through C1 into a rectifier (two diodes, one to GND, other to ramp-output), a hold capacitor, C2, and some suitable output buffer amplifier.

point is that: i have fixed Pulse width signal source. I need to make the shift in its level (step size 10mV upto 6V for a particular period of time). please advice..

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