Goal: evaluate delay of a comparator to a slow ramp where the trip point is a variable parameter that is stepped across input range with virtuoso 6.1.6 spectre.I.e ramp slews from 0 to 5V, trip point is a list of voltages e.g. 1.1, 2.2 3.3 4.4.Each run the output trips in the display, but I want to quantify the delay with parametric simulations. Method: use cross/intercept/delay commands of the calculator Problem(s): 1) I thought I could use delay to select the difference between input crossing a voltage & the output crossing midscale. But I can't see how to tell the delay function to look at a parameter for the trip point on the input.2) If I compute the output switching time with cross I get a table of floating point numbers. Then if I evaluate the inputs crossing with intercept, I get another table of FP numbers. I thought great, I'll just subtract one from the other. but all that appears in the result is the intercept value.3) Then I thought well, I'll evaluate the output switching time with another intercept statement. then I will have apples & apples in the subtraction. but the calculator tells me that subtracting intercept from intercept is invalid. How do I do this?
I've designed latch based comparator. I need to calculate an offset voltage of the entire comparator circuit. How?
I designed a schematic of a latch based dynamic comparator circuit on virtuoso. It comprises a couple of inputs and outputs apart i.e.- (Vin-), ( Vin+ ) and (out-) (out+) respectively with 01+ and 01- interconnects preamplifier and latch stages of the comparator circuit.
How to calculate the delay / Speed of the comparator circuit?
Well, posting on the end of an 8-year old thread which only overlaps slightly with your question (and wasn't answered at the time) isn't the best way (especially if you read the forum guidelines which ask you not to do that).
You might find it useful to look at this workshop: ADC Verification. It has a module on dynamic comparator characterisation (including measuring the offset). May not cover everything you want but should give you some useful pointers.