Hi...
Can anyone help me in finding information about OTA ( Operational Transconductance Amplifier)
1. OTA as a differentiator
2. OTA as an integrator
3. OTA as a filter
The term to Google on is "transconductance amp", which gets 165,000 hits.
The three functions you want are op amp functions where the feedback network is where the function is accomplished. OTA's work without feedback, so they don't usually sub for op amps.