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How to measure THD ang gain in cadence 6.1.4

ralakhani

Hello everyone,

I have designed OTA for hearing aid application. I want to measure THD of OTA. How can i measure it?

The value that i get is it in percentage or not? 

Another query is that gain of the OTA is the ratio of output current to input voltage or ratio of output voltage to input voltage?

please help me i am too confused becoz i have calculated as ratio of output voltage to input voltage, but i got it negative dB value.

And also tell me what is the possible value of gain for OTA of hearing aid application? 

plz, help me........... thanks in advance......... 

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