Thu Dec 23 21:46:13 EST 2010


- Is offset the only problem for LTP (Long Tail Pair) ?

- LTP offset for opamp / OTA: does it really matter for non-DC audio?

  Note that current gain in an ideal OTA is  

     I_out = I_bias exp(V_d / V_T).

  Since V_T is 25mV, you do want to take it into account when DC
  coupling is used and mismatch goes over a couple of mV.