iaf
Member level 3
Hi, I'm using a single stage amplifier IC design as a comparator for generating a reset signal when the input voltage goes below the refrence voltage (0.7V), the input voltage is produced by a voltage divider from the voltage supply (3.3V) so i'm getting an input range from 0-0.9V.
Now i want to characterize the comparator calculating the gain, delay time, slew rate etc. The problem that what matters for me is the voltage drop rate which varies with the fall rate of the supply. I tried simulating with small input voltage overdrive 0.65-0.75V but the comparator is too slow for reaching the rails(which are not really reached) depending on the load i'm using (which i don't really know) so for every change in the overdrive voltage or the voltage fall rate i get different values.
My question is how to calculate these values while the values of the overdrive voltage and voltage fall rate are variable. Also which load should i expect when this output is going to be connected to the reset pin in the Microcontroller? and which charectertistics would be important in this case?
Thanks
Now i want to characterize the comparator calculating the gain, delay time, slew rate etc. The problem that what matters for me is the voltage drop rate which varies with the fall rate of the supply. I tried simulating with small input voltage overdrive 0.65-0.75V but the comparator is too slow for reaching the rails(which are not really reached) depending on the load i'm using (which i don't really know) so for every change in the overdrive voltage or the voltage fall rate i get different values.
My question is how to calculate these values while the values of the overdrive voltage and voltage fall rate are variable. Also which load should i expect when this output is going to be connected to the reset pin in the Microcontroller? and which charectertistics would be important in this case?
Thanks