ICdesignerbeginner
Member level 5
Hi
I am simulating a low frequency differential OTA circuit. And I want to calculate THD. I am using calculator in cadence. First i take the transient output of THD then take thd . E.g. dB20(thd (VT1-VT2) ) . I am using rectangular window its showing -40dB
When i am using DFT of the transient output its showing 57 dB which one is correct. My fundamental frequency is 100Hz.
The inputs applied at the OTA circuit is vsin fr9m analig. But i have read in different forums about placing port from analog lib at input. Which input should I use.
I am simulating a low frequency differential OTA circuit. And I want to calculate THD. I am using calculator in cadence. First i take the transient output of THD then take thd . E.g. dB20(thd (VT1-VT2) ) . I am using rectangular window its showing -40dB
When i am using DFT of the transient output its showing 57 dB which one is correct. My fundamental frequency is 100Hz.
The inputs applied at the OTA circuit is vsin fr9m analig. But i have read in different forums about placing port from analog lib at input. Which input should I use.