analog digital output average mean value

helllo,

Hello,

I have 4 bit analog digital output. By averaging output, I can not precise result because tools take analog signal. and since analog signal have changes since temperature and little edge distortions, tool dont give me precise average mean value. I want to take precise average value without using verilogA model. How can I achieve this?

sorry, I attached right figure as seeen in the below

I combined your duplicate posts.

You'd need to use the sample() function in the calculator to sample at the points where it is flat, and then use the average function with the fairly new continuous option set to "no". This was added in IC6.1.8/ICADVM20.1 ISR19 and means that the average is computed by summing the y values at all points (this is why you want to sample it first) and dividing by the number of points. The default (continuous=yes, which was the old behaviour) works by integrating the area under the curve (including the transitions) and dividing by the x-range - so that's going to be slightly different.

Andrew

Thank you andrew.

How Can I set the new cont. option set??Also, I can get  digital decimal values as seen in the figure for average? I think that signed decimals bits which I converted, cadence tool get  as a analog signal?Is it right? 

How Can I set the new cont. option set?

Your last two questions are slightly garbled so I'm not entirely sure what you mean. If you have a waveform such as the red-pink signal you showed in a graph before, that is suitable for feeding to the average function, although as I said you'd probably want to sample it first to ensure you only have one point per period, and then use average with ?continuous "no" - which can be chosen from the calculator (assuming you're using a recent enough version):

Dear abdurrahman0234,

I was about to respond to "attempt" to save Andrew some time, when as usual, Andrew responded sooner than I could! To expand on his response, Figures1 and 2 show the Calculator expressions that are invoked when the ?continuous argument is set to "no" and "yes" respectively. This is further detailed in the Help GUI for the average function. From the Help GUI, the definitions for the two ?continuous argument is shown in Figure 3.

Shawn

Figure 1

Figure 2

Figure 3

I experienced this, tool can not be y axis values precisely, especially at the edges. Have a another way to get average for 4 bit analog output?

abdurrahman0234 said:

I experienced this, tool can not be y axis values precisely, especially at the edges. Have a another way to get average for 4 bit analog output?

I have no idea what you're saying here. We've given you a way of getting the average, but I don't know what you mean by "tool can not be y axis value precisely" (I recognise that English is not your first language, but this statement doesn't mean anything). What is wrong with the method we have suggested?

Andrew

I apologize Andrew,

for example digital analog value '840 mv' for  +1 bit, cadence takes it as a 838 mV so average value is calculated wrongly. (Average is fluctuated)