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This is the equivalent model of an ideal single-ended OTA: enter image description here

Now, this is the equivalent model of an ideal fully differential OTA: enter image description here

Now, is there a rule for getting a certain circuit with a fully differential OTA starting from that of a single-ended OTA?

For instance, I have to realize this circuit with a fully differential architecture: enter image description here

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  • \$\begingroup\$ Just to clarify: You are not looking for the implementation of the OTA, but for your last circuit (single-ended) in a differential version, correct? \$\endgroup\$
    – pschulz
    Feb 28, 2020 at 21:21
  • \$\begingroup\$ Yes, I'm looking for the last circuit \$\endgroup\$
    – Kinka-Byo
    Feb 28, 2020 at 21:47

1 Answer 1

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Use two single-ended amps. Switch the inputs on one of them.

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